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Universal Telephone IC
Description
* All Functions Integrated
Electrostatic sensitive device. Observe precautions for handling.
U3761MB-S
TEMIC Semiconductors' low-voltage telephone circuit U3761MB performs all the speech and line interface functions required in an electronic telephone set, the tone ringer, the pulse and DTMF dialing with redial, notice function, and 13 memories. Operation below 15 mA is possible with reduced performance.
Features
Speech Circuit
D Adjustable DC characteristic D Symmetrical input of microphone amplifier D Receiving amplifier for dynamic or
piezo-electric earpieces
D Ten by 17 digits indirect (two-touch) memory D Notice function up to 32 digits D Standard low-cost crystal 3.58 MHz or
ceramic resonator
D Automatic line-loss compensation
Dialer
D Handset Mute (Privacy) with optical indication D Additional toggle flipflop D Internal loop interrupt detection
Tone Ringer
D DTMF / pulse switchable D Pulse dialing 66/33 or 60/40 or DTMF dialing
selectable by pin
D D D D D D
Selectable flashing duration by key pad Pause function Optical indication of temporary DTMF mode Keytone for pulse dialing Last number redial up to 32 digits Three by 17 digits direct (one-touch) memory
D D D D
2-tone ringer Adjustable volume RC oscillator Adjustable threshold
Benefits
D Low number of external components D High quality through one IC solution
Ordering Information
Type U3761MB-SFN U3761MB-SFNG3 Package SSO44 SSO44 Remarks Tube Taped and reeled
Rev. A5, 26-May-99
1 (25)
Preliminary Information
U3761MB-S
Tip
Block Diagram / Applications
2 (25)
VI 100 k W HKS 1a 470 W 5 MW HKS 1b 75 V Ring 220 kW Next to VDD and GND 220 mF MPSA42 18 k W 220 nF 220 nF 2N5401 CL 2.2 nF PRIND Mask DP VDD MFO MIC1 MIC2 MICO TIN 2.2 m F CLIM VL 13 V/ 1W 3 kW 33 k W LED 4.7 V 470 nF 1 mF 1 kW
3.58 MHz
to key board matrix
XT
XT
HKS
MODE
Clock generator
- +
Micro- phone amplifier Control function Sidetone amplifier
ST 2.4 kW
Transmit amplifier
*/T 0
Important note: Application examples have not been examined for series use or reliability, and no worst case scenarios have been developed. Customers who adapt any of these proposals must carry out their own testing and be convinced that no negative consequences arise from the proposals.
680 W 330W
Earth
KT
Mute control
3.3 nF
C1
C2
Pulse control logic
47 nF RECIN 2.2 m F
C3
Receiver attenuation
C4
Read - write counter Supply current regulator Control function
Control logic
R1
1
2
3
S M1
R2
Receiving amplifier
RECO1 1.8 k W 100 W RECO2 12 kW AGC RDC VI 39 W 1W
4
5
6
M2
R3
Key- board inter- face RAM
7
8
9
A M3
R4
# R/P N
F1 F2 F3 E
Location latch Data latch & decoder D/A converter ROW & column programmable counter
AGC current generator
300 W 100 mF
Figure 1. Block diagram / applications
Preliminary Information
Supply Power on reset Clock signal oscillator Divider Tone signal generator Divider Bandgap reference Comparator with hysteresis
VI
MFIND
4.7 V
MUTE VRING 10 k W OUT 10
mF
TEST
1 nF
RCK
150 k W
VRIAC 10 k W THA
HFI
Rev. A5, 26-May-99
HFO
Toggle flipflop
14936
U3761MB-S
Pin Description
C1 1 C2 2 C3 3 C4 4 Earth 5 HFI 6 HFO 7 XT 8 XT 9 MFO 10 MFIND 11 44 43 42 41 40 39 38 37 36 35 34 R4 R3 R2 R1 Mask DP MODE KT HKS n.c. TEST VDD OUT
U3761MB-B
GND 12 MIC 1 13 MIC 2 14 MICO 15 VL 16 RDC 17 TIN 18 VI 19 MUTE 20 PRIND 21 RECIN 22
16258
33 32
31 RCK 30 VRING 29 VRIAC 28 AGC
27 THA 26 ST 25 24 23
Figure 2. Pinning SSO44
CLIM RECO 1 RECO 2
Rev. A5, 26-May-99
3 (25)
Preliminary Information
U3761MB-S
1 2 3 4 5 C1 C2 C3
C2-C4
Keyboard input
C1
C4 Earth Earth key ( 604 ms high pulse, 1 s pause)
EARTH
7
HFO
Output will be toggled by each LOW/ HIGH edge at HFI.
HFO
PD
VDD
XT
PD
10
MFO
Error (%) +0.28 -0.52 -0.47 -0.10 +0.57 -0.30 -0.34
MFO
4 (25)
Preliminary Information
E E E E
Output of DTMF DTMF output frequency Specified Actual (Hz) (Hz) 697 699 R1 770 766 R2 852 848 R3 941 940 R4 C1 1209 1216 1336 1332 C2 1477 1472 C3
VDD
E
9
XT
XT
E
E
8
XT
A built-in inverter provides oscillation with an inexpensive 3.579545-MHz crystal or ceramic resonator
VDD
EE E
HFI
VDD
PD
VDD
PD
VDD
VDD
VDD
PD
Rev. A5, 26-May-99
200K
EE
6
HFI
Toggle flipflop input Input with 200 kW pull-down resistor. HFI triggers HFO with each LOW/ HIGH edge.
E E EE E E E
VDD PD VDD VDD
Pin
Symbol
Function
Configuration
VDD
VDD
PD = Protection Device VDD
PD
E
U3761MB-S
MFIND
12 13
GND MIC 1
Ground Inverting input of microphone amplifier
14
MIC 2
Non-inverting input of microphone amplifier
50K
1V
MIC1 MIC2
1V
15
MICO
Transmit pre-amp output which is normally capacitively coupled to Pin TIN
MICO
PD
16
VL
Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal.
VL
PD 16V
RDC
AGC
PD
RDC
1V 5.6K
TIN
PD
16V
Rev. A5, 26-May-99
Preliminary Information
EE EE EE
18
TIN
Input to the line output driver amplifier. Transmit AGC applied to this stage.
E
17
RDC
An external resistor (1 W) is required from this pin to GND to control the DC input impedance of the circuit. It has a nominal value of 39 W for low-voltage operation. Values up to 100 W may be used to increase the available transmit output voltage swing at the expense of low-voltage operation.
EE EE E E
50K
E
E E
Pin 11
Symbol MFIND
Function Output switches to low being in temporary DTMF mode. Reset by on hook condition. Maximum voltage at MFIND = 5.5 V.
Configuration
VDD
MFIND
PD
VI
PD
VI
PD
VI
1V
16K
PD VL
PD
5 (25)
U3761MB-S
VI
16V PD
20
MUTE
MUTE
PD 6.7V
MUTE
21
PRIND
PD
22 23 24
RECIN RECO2 RECO1
Receive amplifier input. The receiving amplification is regulated by an AGC. Output of the receive amplifier. Dynamic transducers with a minimum impedance of 100 W can be directly driven by these outputs.
RECIN
RECO2 RECO1
6.7V PD
25
CLIM
6V PD
26
ST
16V PD VRIAC
27
THA
Ringer threshold adjustment
THA
PD
6V 6V
20K
28
AGC
The range of transmit and receive gain variations between short and long loops may be adjusted by connecting a resistor RAGC from this pin to (GND). This pin can be left open to set AGC out of action.
AGC
PD
RDC
6 (25)
Rev. A5, 26-May-99
Preliminary Information
E EE
12K
140K
E
The output of the sidetone cancellation signal, which requires a balanced impedance of 8 to 10 times the subscribers line impedance to be connected to Pin VL.
ST
E
Time constant of anticlipping in transmit path. CLIM 2.2 mF CLIM = GND: anticlipping inactive
w
CLIM
E EE E E
PRIVACY indication pin Open collector with minimum 1 mA drive current to GND when PRIVACY = active
PRIND
6.7V
VL
60K
VL
60K
VL IDC
E
30K
E E
VBG 1V 1V VL PD
Pin 19
Symbol VI
Function This internal voltage bias line must be connected to VL via an external resistor which dominates the AC input impedance of the circuit and should be 680 for an 600-W input impedance or 1.2 k for a 900- input impedance. Pin for testing Forcing MUTE to GND mutes the microphone and decreases the earpiece signal by typically 29 dB; no pull up circuit allowed.
Configuration
E
U3761MB-S
Pin 29 Symbol VRIAC Function Ringing supply
10K
Configuration
VRIAC
50V PD 70K
30
VRING
DC supply voltage for the tone ringer is limited to 30 V with integrated Z-diode.
VRING
30V PD 6.5K
OUT
PD
50V
31
RCK
RC clock oscillator for ringer
3.4V
RCK
PD
6V 6V
32
OUT
Buzzer output
VRING
PD 30V 200 6.5K
OUT
50V PD
33
VDD
Supply output for dialer part
VDD
6V
6V
PD
34
Test
Test input with 6.25 kW pull-up resistor
TEST
VDD
VDD
PD
35 36
n.c. HKS
Not connected Hook switch input. HKS = 0: On-hook state. Chip in sleep mode, no operation (external pull-down resistor recommended). HKS = 1: Off-hook state. Chip enable for normal operation. IHKS 0.5 mA
HKS
VDD
PD
Rev. A5, 26-May-99
6.25 k
Preliminary Information
EEE
200 0.8V VL
VDD
EEE EE
7 (25)
E E E E EE E EE
U3761MB-S
KT
38
MODE
MODE
PD
39
DP
Pulse dialing output. Flash key will cause DP to be active in either DTMF mode or pulse mode. In on-hook state is DP = VDD.
DP
MASK
41 42 43 44
R1 R2 R3
Keyboard input
R1
VDD
PD VDD
R2-R4
R4
PD
8 (25)
Preliminary Information
E
40
Mask
Short mute during pulse dialing, active high During MASK an internal npn-transistor shortens VL against VI.
E
E
E E
E
E
Pulling MODE pin to: C3 tone mode with 87 ms burst time and 140 ms pause C4 tone mode with 87 ms DTMF burst and 87 ms pause R1 pulse mode with 20 pps, Make/Break = 40/60 R2 pulse mode with 20 pps, Make/Break = 33/66 R3 pulse mode with 10 pps, Make/Break = 40/60 R4 pulse mode with 10 pps, Make/Break = 33/66 C1 pulse mode with 10 pps, Make/Break = 33/66 and temp. DTMF with 87 ms DTMF burst, 140 ms pause MODE pin pulled to R4: with temporary DTMF, 87 ms DTMF burst and 87 ms pause
E E E E
VDD PD VDD
Pin 37
Symbol KT
Function Keytone output signal which is sent out in pulse dialing mode with a keytone frequency of 582 Hz. KT sink/ drive current is about 100 mA at VDD = 2.5 V
Configuration
VDD
VDD
VDD
PD VDD
PD
E E
VDD
VDD
Rev. A5, 26-May-99
U3761MB-S
D D D D
S: Store function key
A: Indirect repertory dialing function key (LN 0 to 9) R/P: Redial and pause function key N: Notice function
Normal Dialing
OFF HOOK
1. 2. 3.
D1, D2, ..., Dn will be dialed out. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits. If redialing length oversteps 32 digits, the redialing function will be inhibited.
Redialing
A AA A AA A A A AAA AA A A AA A AA A A A AAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A A A AAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AA AA A A A AAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AA A A A AAA AA A
OFF HOOK
The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it executes the pause function (3.6 s). Keys stored in redial memory: 0 to 9, *, #, R/P, F1, F2, F3, Earth, A, M1, M2, M3, N
A AA AAA AAA A AAAA AA A A A AA AAA A A AAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA AAA A AAAA AA A A AAA A AAAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA AAA A AAAA AA A A AA A AAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA A A A AA AAA AAAAAAAAAA AA A AA A AAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA A AA A AAA AA A AA AAA A AA A AAA AA A A A AAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAA A AAA A AA A A A AA A A AA A
Number Store
OFF HOOK ,
1.
D1, D2, ..., Dn will be stored in memory location only (not in redial memory) and dialed out. , S , D1 , D2 , ..., Dn , S , Mn (or Ln )
OFF HOOK
2. 3.
D1, D2, ..., Dn will be stored in memory location but will not be dialed out.
R/P and In store mode,
4.
The store mode is released after the store function is executed or when the state of the hook switch is changed.
Rev. A5, 26-May-99
AAAAA A A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAA A A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA
:/T
F1 C1 1 4 7 C2 2 5 8 0 F2 C3 3 6 9 # F3 C4 S A R/P E M1 M2 M3 N R1 R2 R3 R4
Keyboard Operation
D :/T: : function; D D
pulse-to-tone function
M1 to M3: One-touch memory F1, F2, F3: Flash keys
AAAAAAAAAAAAAAAAA A A A AA A A A A A A AA A A A A A AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA A A A AA A A AAAAAAAAAAAAAAAAA A A AA A A A
, D1 , D2 , ..., Dn , D1 , D2 , ..., Dn D1AA ,AA , ..., D2 Dn , S ,
BUSY, Come
ON HOOK
,
OFF HOOK
,
R/P
S
,AA (orAA ) Mn Ln
:/T
keys can be stored as a digit in memory, also F1, F2, F3, Earth. R/P is the pause function key; is the pulse-to-tone function key.
:/T
9 (25)
Preliminary Information
AAA AAA AAAA A AA A AAAAAAAAAAAAAAAAAAA A AAA AAAA A AA AAA AAA AAAA A AA AAA AAA AAAA A AA A A AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA A AAA AAAA A AA A AAA AAAA A AA AAA AAAA A AA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAA AAAA A AA AAA AAAA A AA
Flash and Earth can be switched with following procedures:
AA AA AAAAAAAAAAAAAAAA A AA AA AA A AA AA AA AAAAAAAAAAAAAAAAAAAAA A AAAAAAAAAAAAAAAA AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AAAAAAAAAAAAAAAAAAAAA A AAA AA A AA AAAAAAAA AA AAAAAAAAAAAAAAAAAAAAA A AAA AA A A A AA AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA A A AA AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AA AA AA
Switching of Flash and Earth Cascaded Dialing
3. 2. OFF HOOK 4. 3. 2. 1. Notice function is valid as first key only. D1 to Dn will be dialed out after the N key is pressed. Repertory dialing + Normal dialing Redialing is valid as first key-in only. Redialing , N + + Repertory dialing + Normal dialing Normal dialing + Repertory dialing + Normal dialing Normal dialing
AAAAAAAAA A AA A A AA A A AAAAAAAAA AAAAAAAAA A AA A AAAAAAAAA AA A AAAAAAAAAAAAAAAAAA AAA A AAA AA A AAAA A AAA AA A A AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAA A AAA AA A AAAAAAAAAAAAAAAAA AA A AAA AA A AA A AA AAAAAAAAAAAAAA AAA AA A A A AA A AA A A AA A A AAAAAAAAAAA AAAAAAA A A AAAAAAAAAAAAAA A A AA A A AAA AA A A A A AA A AA A A A AA A A AAAAAAAAAAA AAAAAAAAAAA AAAAAAAAA AAAAAAAAAAA AAAAAAAAAAA AA A A A AA AAAAAAAAAAA AAAAAAAAAAA AA A A
1.
Notice (N)
Repertory Dialing
U3761MB-S
10 (25) 2. 1. OFF HOOK 2. 1. If the dialing of D1 to the N memory. OFF HOOK OFF HOOK S S , + + D1 # # , , , Mn + + A to D2 3 2 , Dn is finished, pressing the , ..., Ln + + S S Dn , = = N Earth Flash N
Preliminary Information
key will cause D1 to Dn to be copied Rev. A5, 26-May-99
U3761MB-S
HKS tKRD KEY IN 3 tKID DP tIDP MUTE
BM
4
2
2 tKID
tPDP
tIDP
BM
tIDP
tPDP
tIDP
MASK Low
MFO
OSC
Oscillation
15019
Figure 3. Pulse mode normal dialing
HKS tKRD KEY IN R/P tKID DP
BM
ttPDP MUTE
tIDP
BM
tIDP
tIDP
MASK Low
MFO
OSC
Oscillation
15020
Figure 4. Pulse mode auto dialing
Rev. A5, 26-May-99
11 (25)
Preliminary Information
U3761MB-S
HKS tKRD KEY IN R/P tKID DP
BM
t > tOHD
tPDP MUTE
tIDP
BM
tIDP
MASK Low
MFO
OSC
Oscillation
15021
Figure 5. Pulse mode auto dialing
HKS tKRD KEY IN 3 tKID DTMF MUTE tTD tITP tITP tITP 4 2 5
MASK DP
Low High
OSC
Oscillation
15022
Figure 6. DTMF mode normal dialing
12 (25)
Rev. A5, 26-May-99
Preliminary Information
U3761MB-S
HKS tKRD KEY IN R/P tKID DTMF MUTE tTD tITP tITP tMASK DP
Low High
OSC
Oscillation
15023
Figure 7. DTMF mode auto dialing (tttOHD)
HKS tKRD KEY IN R/P tKID DTMF MUTE tTD tITP t > t OHD
MASK DP
Low High
OSC
Oscillation
15024
Figure 8. DTMF mode auto dialing (tutOHD)
Rev. A5, 26-May-99
13 (25)
Preliminary Information
U3761MB-S
Access Pause
AA A A AA A A AA AA A A AAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A AA A A AA A A AA AA A A A AA A A AA AA A AAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAA A A A AA A A AA AA AAAAAAAAAAAAAAAAAAAAAAAA A A AA A A AA AA A A
OFF HOOK , D1 , D2 , R/P , D3 , ..., Dn' 1. 2. The pause function can be stored in the memory. The pause function is executed in normal dialing and redialing. HKS KEY IN tKID DP tPDP MUTE tP MASK Low tPDP 2 R/P 3 tIDP MFO OSC Oscillation
15025
Figure 9. Pause function
14 (25)
Rev. A5, 26-May-99
Preliminary Information
U3761MB-S
Pulse-to-Tone (:/T)
A A A A AA A A A A AA A AA A A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A AA A A A A AA A AA A AA A A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A AA A A A A AA A AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A AA A A A A AA A AA A A A AA A A A A AA A AA A
OFF HOOK , D1 , D2 , ..., Dn ,
:/T
,
D1'
,
D2'
, ...,
Dn'
If the mode switch is set to pulse mode, then the output signal will be: D1, D2, ..., Dn, Pause (3.6 s), D1', D2' ,..., Dn' (Pulse) (Tone)
2.
If the mode switch is set to tone mode, then the output signal will be: D1, D2, ..., Dn, (Tone) * (Tone) , D1', D2', ..., Dn' (Tone)
3.
The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse mode by going on-hook only.
HKS
KEY IN tKID DP tPDP MUTE
2
*/T
3
tIDP
tP MASK
MFO
OSC MFIND
Oscillation
15026
Figure 10. Pulse-to-tone operation
Rev. A5, 26-May-99
15 (25)
Preliminary Information
U3761MB-S
AAA A A AAA A A AAAAAAAAAAA AAAAAAAAAAA A AAAAAAAAAAA AAA AA A AAAAAAAAAAA AAAAAAAAAAA AA A
OFF HOOK , Fn 1. 2. 3. HKS KEY IN F tKID DP MUTE MASK MFO OSC tKID tKRD tPDP tIDP tTD = key active in debounce = key release debounce = pre-digit pause = inter-digit pause = DTMF output duration KEY IN DP MUTE MASK EARTH 16 (25)
Flash (F1 or F2 or F3)
The dialer will execute flash break and the entire flash pause time will elapse before the next digits are dialed out.
The flash key can be stored as a digit in the memory. Only one flash, however, will be released to the users. The system will return to the initial state after the flash pause time has elapsed. High
F tFB tFP
3
tFP
tITP Oscillation
15027
Figure 11. Flash operation
tITP tFB tFP tP
= intertone pause = flash break time = flash pause time = pause time
Low
15028
Figure 12. Symbolic timing diagram: Earth function
Rev. A5, 26-May-99
Preliminary Information
U3761MB-S
HFI HFO
14937
Figure 13. Symbolic timing diagram: HFI, HFO function
Off hook HKS On hook
XT 165 ms
Figure 14. Symbolic timing diagram: on hook debounce time
14938
60 HKS threshold ( % of VDD ) 55 50 45 40 35 30 2
14916
switch on
switch off
2.5
3.0
3.5 VDD/V
4.0
4.5
5.0
Figure 15. HKS threshold voltage
Absolute Maximum Ratings
Parameters Line current DC line voltage DC voltage at Pins 1 to 11 and 33 to 44 Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60C Junction ambient Symbol IL VL VDC Tj Tamb Tstg Ptot RthJA Value 140 14 5.5 125 - 25 to + 75 - 55 to + 150 0.9 70 Unit mA V V C C C W K/W
SSO44 SSO44
ESD withstand voltage 1 kV according to MIL standard 883d method 3015.7 (HBM)
Rev. A5, 26-May-99
17 (25)
Preliminary Information
U3761MB-S
Electrical Characteristics: Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mVrms, RDC = 39 / 1 W, Tamb = 25C, unless otherwise specified, refer to "Basic Test Circuit". CLIM = GND Parameters Line voltage Test Conditions / Pin IL = 8 mA IL = 20 mA IL = 73 mA IL = 100 mA Ri IL = 20 mA, S5 = open IL = 20 to 60 mA RAGC = infinite Tamb = -10 to +60C IL = 20 mA RAGC = 12 kW, IL = 73 mA IL = 20 mA, S5 = open IL = 20 mA, Vmic = 10 mV, CLIM = 2.2 mF, S1 = open CLIM = 2.2 mF IL > 20 mA, GS = 48dB IL Symbol VL Min. 3.6 5.9 6.9 Ri Gs 45 46.8 -0.5 -0.5 -7 -6 Typ. 1.4 3.85 6.55 Max. 4.1 7.2 8.2 120 48.8 0.5 0.5 - 4.8 2 Unit V V V V k dB dB dB dB % dBm ms - 72 10 1.3 -7.6 1.9 2.5 15 20 dBmp dB dBm dBm dB
Transmit and sidetone Input resistance Gain Gain change with current Gain deviation Line-loss compensation Distortion at line VL = 0.775 Vrms Max. output voltage at line d 5% Attack time transmit anticlipping Noise at line weighted psophometrically Sidetone reduction DTMF amplifier Volume range d < 5% DTMF output level low frequency group Pre-emphasis between high- and low-level frequency group Receiving amplifier Gain Gain change with current
DGS DGS DGs
dt VLmax tatt no GSTA
80 47.8
x
1.2 3.5
y 20 mA
Single tone, IL 20 mA IL = 20 mA, S5 = closed Tamb = -5C to +60C PPRE = PHLG - PLLG, S5 = closed, Tamb = -5C to +60C IL 20 mA IL = 20 to 60 mA RAGC = infinite Tamb = -10 to +60C IL = 20 mA IL = 73 mA IL = 73 mA
w
VL VL PPRE
-4.6 3.1
w
DGR DGR DGR
ni
GR
3 -0.5 -0.3 -7 -6 - 77.5
5 0.5 0.7 - 4.7 - 71
dB dB dB dB dBm
Gain deviation Line-loss compensation Receiving noise at earphone weighted psophometrially Gain change when muted Output voltage push-pull Ear protection differential
IL 20 mA IL 20 mA, Zear = 68 nF, 100 W in series, d 2% IL = 40 mA, Vgen = 4 Vrms, Zear = 68 nF + 100 W
y y
GRM VRECO Vear
24 0.8 1.3
29 0.9 1.6
34
dB Vrms Vrms
2.5
18 (25)
Rev. A5, 26-May-99
Preliminary Information
U3761MB-S
Electrical Characteristics: Speech Circuit (continued)
Parameters Test Conditions / Pin Supply voltage (for internal use only) Output voltage IL 20 mA dialing mode
Note: Output must be limited externally to max. 5.5 V
Symbol VDD
Min. 2.0
Typ.
Max. 6.3
Unit V
y
Available current for peripherals Transmit Maximum output voltage swing at line Mute suppression transmit with privacy function
IL
y 20 mA dialing mode
IDD
150
mA
3.4 4 Vpp dB
IL = 20 mA, VMIC = 50 mVrms IL = 20 mA
VL max GSPRIV 60
DC Characteristics Dialer
VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1 Parameters Memory retention current Data retention voltage DTMF distortion DP output sink current Keyboard input drive current Keyboard input sink current Key on resistance Key off resistance Mask sink / drive current Earth sink / drive current Isolation resistance XT/XT Maximum voltage at HKS Maximum input current at HKS Test Conditions / Pins HKS = 0, VDD = 1.0 V RL = 5 kW VPO = 0.5 V VI = 0 V VI = 2.7 V Symbol IMR d IPL IKD IKS RKON RKOFF IM H/L Ie H/L Riso 0.5 20 500 5 100 0.5 0.5 4.7 5.5 0.5 Min. Typ. 0.5 - 30 Max. 0.1 - 23 Unit
mA
V dB mA
mA mA
kW kW mA mA MW V mA
Rev. A5, 26-May-99
19 (25)
Preliminary Information
U3761MB-S
AC Characteristics Dialer
Parameters Keypad active in debounce mode Key release debounce Pre-digit pause Test Conditions / Pins Symbol tKID tKRD tPDP tPDP tPDP tPDP tIP tIP M/B Min. 15 15 37 31 Typ. 20 20 40 33.3 20 16.65 836 512 40:60 33:67 87 87 87 140 98 250 604 Max. 25 25 41 33.5 Unit ms ms ms ms ms ms ms ms % % ms ms
Inter-digit pause ( auto dialing ) Make/break ratio
DTMF output duration Inter-tone pause Flash break time F1 F2 F3 Rise time of leading edge at HKS Flash pause time Pause time On-hook debounce time Earth time Earth pause time Break duration
MODE pin = R3 (10 pps) MODE pin = C1, C4 (10 pps) MODE pin = R1 (20 pps) MODE pin = R2 10 pps, tIP = tIDP + tPDP 20 pps MODE pin = R1 (20 pps), R3 (10 pps) MODE pin = C1, R4 (10 pps) R2 (20 pps) Auto dialing, MODE = C4 MODE = C3 Auto dialing, MODE = C4 MODE = C3 C1 connected to GND C2 connected to GND C3 connected to GND 20 to 70% of VDD F1, F2, F3
810 40.8:60.2 35.6:64.4
860 39.2:60.8 31.2:68.8 90 90 90 147 101 255 610 10 1.1 3.7 185
tTD tITP tFB
84 84 84 135 95 245 590
trHKS tFP tP tohd tet tpt tB tB tM tM tP tP 95 38 31 0.9 3.5 145 1 3.6 165 604 1 60 66.7 30 33.35 40 33.3 20 16.65 100 50
ms ms ms ms s s ms ms s ms ms ms ms ms ms ms ms ms ms
C4 connected to GND MODE pin = R3 MODE pin = C1, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = R3 MODE pin = C1, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = C1, R3, R4 MODE pin = R1, R2 (20 pps)
0.9 57.6 63
1.1 62.4 69
Make duration
41 35
Break + make duration
105
20 (25)
Rev. A5, 26-May-99
Preliminary Information
U3761MB-S
Electrical Characteristics Tone Ringer
fRCK = 4 kHz, VRING = 20 V, Tamb = 25_C, reference point GND, unless otherwise specified Parameters Supply current, outputs open Switch-on threshold Switch-off threshold Ringing frequency Range of external compog p nents for R/ C oscillator Audio sequence frequency Output voltage swing Turn-off delay VRing = 25 V, Cout = 68 nF See figure 15 Test Conditions / Pins VRIAC = 20 V VRIAC, THA = open VRIAC R = 150 k, C = 1 nF VRIAC > VRON Symbol IRING VRON VROFF f1H f1L C R f2 Vout toff Min. 2.1 8 5.0 937 752 1000 50 11.5 21 Typ. Max. 3.8 10 6.5 1083 868 2200 330 14.0 100 Unit mA V V Hz Hz pF kW Hz Vpp ms
9 5.6 1010 808
12.5 23 65
Volt VRING 0 VRIAC 0 OUT Melody t 0 toff
Figure 16. Turn-off delay time
12459
t
t
Note
The oscillator frequency is defined by R and C at Pin RCK. f Osc
+ 1.594
C
1 [R
) 3809 W]
frequency f1L and high frequency f1H are derived from oscillator frequency by internal deviders. So f2, f1H and f1L are given by: f2 f + 320
Osc
The audio sequence frequency f2 and the ratio of low
;
f 1H
+ f4
Osc
;
f 1L
+ f5
Osc
Rev. A5, 26-May-99
21 (25)
Preliminary Information
OUT
I/O
VMIC VGEN 100 mV CL 100 m 1m 25k 600 S5 220n S8 S6 VDD VL 13V 4.7k S11 XT ST 47n RECIN VI RECO1 VRECO RECO2 330 AGC RDC PRIND VRING VRIAC OUT THA 68n VRIAC 39
OUT
I/O
Basic Test Circuit
U3761MB-S
To tester
To tester
Preliminary Information
MIC1 MIC2 MFO MICO TIN KT DP MODE HKS XT
To tester
22 (25)
To tester To tester ab S7 VGEN 300 mV / 1 kHz VDD 8.2k 25k a S9 b 220 m 1m IL 1.5k VL 2.2n 620 100 m 2.2 m
I/O
IN
CLOCK
IN
3.58 MHz
IN
Figure 17. Basic test circuit
IN
IN IN
IN
IN
U3761MB-S
IN IN
12k
S1
I/O OUT
OUT
OUT
C1 C2 C3 C4 R1 R2 R3 R4 MUTE MASK MFIND EARTH CLIM
To tester
2.2 m
150k
IN
VRING
1n GND
IN OUT
RCK TEST HFI HFO
16259
Rev. A5, 26-May-99
U3761MB-S
Equations for Electrical Characteristic Parameters of the Speech Circuit
The equations refer to the basic test circuit. If not otherwise specified, the switches in the basic test circuit are inactive. Transmit gain GS
+ 20
log
VL V MIC
VMIC = 3 mV/1 kHz, S5 = open
Receiving gain GR
+ 20
log
V RECO VL
RX-mode: Vgen = 300 mV/1 kHz, S7b
Line-loss compensation transmit DGS GS(at IL 73 mA)-GS(at I L
+
+
+ 20 mA)
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Sidetone reduction GSTA
+ 20
log
VL (in TX-mode) V RECO
) GR
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Line-loss compensation receive DGR GR(at I L 73 mA)-GR(at I L
+
+
+ 20 mA)
RX-mode: Vgen = 300 mV/1 kHz, S7b
Gain change when muted GRM
+ 20
log
V RECO (Mute VL
+ inactive)-20
log
V RECO (Mute VL
+ active)
Vgen = 100 mV/1 kHz, S5 = open, S8 = open
Input impedance of microphone amplifier 50 k Ri V L (S6 + closed) -1 V L(S6 + open)
+
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Rev. A5, 26-May-99
23 (25)
Preliminary Information
U3761MB-S
Packaging Information
Package SSO44
Dimensions in mm
18.05 17.80 9.15 8.65 7.50 7.30
2.35 0.3 0.8 16.8 44 23 0.25 0.10
0.25 10.50 10.20
technical drawings according to DIN specifications 13040
1
22
24 (25)
Rev. A5, 26-May-99
Preliminary Information
U3761MB-S
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC Semiconductors products for any unintended or unauthorized application, the buyer shall indemnify TEMIC Semiconductors against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423
Rev. A5, 26-May-99
25 (25)
Preliminary Information

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