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U3760MB-N
Low-Voltage Standard Telephone Circuit
Description
TEMIC Semiconductors' low-voltage telephone circuit, U3760MB-N, performs all the speech and line interface functions required in an electronic telephone set tone ringer, pulse and DTMF dialing with redial. Electrostatic sensitive device. Observe precautions for handling.
Features
Speech Circuit D Adjustable dc characteristic D Symmetrical input of microphone amplifier D Receiving amplifier for dynamic or piezo-electric
earpieces
D Automatic line-loss compensation
Dialer
D D D D
Selectable flashing duration by key pad Pause function Last number redial up to 32 digits Standard low-cost crystal 3.58 MHz or ceramic resonator
D DTMF / pulse switchable D Pulse dialing 66/33 or 60/40 for 10 ppS and 20 ppS or
DTMF dialing selectable by pins
Tone Ringer
D Key tone D Handset Mute (Privacy) with optical indication
D D D D
Two-tone ringer Adjustable volume RC oscillator Adjustable threshold
Benefits
D Low number of external components D High quality through one IC solution D One IC for all standards
Ordering Information
Extended Type Number U3760MB-NFN U3760MB-NFNG3 Package SSO44 SSO44 Tube Taped and reeled Remarks
Rev. A1, 31-May-99
1 (20)
Preliminary Information
5V1 1M 220 k Tip HKS 5M 470 1m 220 k HKS BC546 EP 18 k 3k MPSA42 22 k 220 n 2n2 HKS Microphone - amplifier + Control function 2.4 k Sidetone amplifier 3n3 ST Pulse control logic Supply current regulator Control function Receiver attenuation RECIN 2.2 m Receiving amplifier RECO1 100 RECO2 AGC 12 k RDC 39 1W VI VRING Supply Power-on-reset VRIAC OUT Tone signal generator 10 k 28 V 10 m 390 100 m 1.8 k 47 n EP Mute control Transmit amplifier VL 680 MODE BM KT DP VDD2 VDD1 MFO MIC1 MIC2 MICO TIN CL 13 V 1W 330 2N5401 33 k 220 m 75V 470 k 47 n 5k 100 n
1 kW
100 n
3.58 MHz
XT
XT
U3760MB-N
PRIND
Clock generator
C1
Block Diagram / Applications
C2
C3
K e y b o a r d RAM l o g i c
Read - write counter
C o n t r o l
1
2
3 F1
R1
4
5
6 F2
R2
Figure 1.
AGC current generator D/A converter Data latch & decoder ROW & column programmable counter
7
8
9 F3
R3
*/T 0
# R/P
R4
i n t e r f a c e
Location latch
Preliminary Information
Clock signal oscillator Divider Divider Bandgap reference Comparator with hysteresis
16260
PRIVACY
47 n
MUTE
1n
RCK
150 k THA 10 k
GND1
Rev. A1, 31-May-99
GND2
AA AA
Ring
LED
AA
2 (20)
VI
220 k
U3760MB-N
SSO44 C1 1 C2 2 C3 3 n.c. 4 n.c. 5 n.c. 6 KT 7 XT 8 XT 9 MFO 10 GND 2 11 44 43 42 41 40 39 38 37 36 35 34 R4 R3 R2 R1 n.c. DP MODE BM HKS n.c. VDD 2 VDD 1 OUT
U3760MB-N
GND 1 12 MIC 1 13 MIC 2 14 MICO 15 VL 16 RDC 17 TIN 18 VI 19 MUTE 20 PRIND 21 RECIN 22
16261
33 32
31 RCK 30 VRING 29 VRIAC 28 AGC
27 THA 26 ST 25 24 23 PRIVACY RECO 1 RECO 2
Rev. A1, 31-May-99
3 (20)
Preliminary Information
U3760MB-N
Pin Description
SSO44 1 Symbol C1 Function Keyboard input
C1
PD
Configuration
2
C2
C2
PD
3
C3
C3
PD
4, 5, 6, 35 7
NC KT
Not connected Key tone signal output generated for all keys in pulse dialing mode (except Flash + Redial) with a frequency of about 1240 Hz and duration about 50 ms A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator
XT
PD
KT
8
XT
9
XT
XT
40P PD 40P
10
MFO
Output of DTMF DTMF output frequency Specified Actual (HZ) (Hz) R1 697 699 R2 770 766 R3 852 848 R4 941 948 C1 1209 1216 C2 1336 1332 C3 1477 1472
Error (%) +0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34
MFO
12 11
GND 1 GND 2
Ground 1 connected with ground 2
4 (20)
Rev. A1, 31-May-99
Preliminary Information
U3760MB-N
SSO44 13 Symbol MIC 1
1V 50K
MIC1 MIC2
14
MIC 2
Non-inverting input of microphone amplifier
50K
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
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. Input to the line output driver amplifier. Transmit AGC applied to this stage.
AGC
PD
RDC
1V 5.6K
TIN
PD
16V
19
VI
This internal voltage bias line must be connected to VL via an external resistor, RB, 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
MUTE
VI
16V PD
MUTE PD 6.7V
Rev. A1, 31-May-99
Preliminary Information
E
20
MUTE
30K
E EE EE
18
TIN
EE E E E
1V
E
E
VI VI
Function Inverting input of microphone amplifier
Configuration
PD
PD
VI
1V
16K
PD VL
PD
VBG
5 (20)
U3760MB-N
SSO44 21 Symbol PRIND
PD
22
RECIN
Receive amplifier input. The receiving amplification is regulated by an AGC.
REC IN
24
RECO1
23
RECO2
Output of the receive amplifier. Dynamic transducers with a minimum impedance of 100 W can be directly driven by these outputs.
RECO2 RECO1
6.7V PD
25
PRIVACY Input for handset mute
PRIVACY
PD
26
ST
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. Ringer threshold adjustment
ST
16V PD VRIAC
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
29
VRIAC
Ringing supply
10K
50V PD
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
6 (20)
Rev. A1, 31-May-99
Preliminary Information
EE EEE
VRIAC
70K
E E EE
E
27
THA
12K
140K
E E
6V
EE E EE EE E E
60K VL 60K VI 6V 40K 0.6V
Function PRIVACY indication pin Open collector with minimum 1 mA drive current to GND when PRIVACY = active
Configuration
PRIND
6.7V VL
1V
1V
VL
PD
200
U3760MB-N
RCK
PD
6V 6V
32
OUT
Buzzer output
VRING
PD 30V 200 6.5K
OUT
50V PD
33
VDD 1
Supply output for dialer part
6V 6V PD
VDD1
34
VDD 2
Supply input of dialer section
VDD2
PD
36
HKS
Hook switch input. HKS = 1: On-hook state. Chip in sleep mode, no operation. HKS = 0: Off-hook state. Chip enable for normal operation. If BM = floating pulse dialing with 3:2 B/M ratio If BM is connected to ground pulse dialing with a B/M ratio of 2:1 Pulling mode pin to VDD places the dialer in tone mode. Pulling mode pin to GND places the dialer in pulse mode ( 20 ppS ). If the mode pin is left floating, the dialer is in pulse mode ( 10 ppS) N-channel open drain pulse dialing output. Flash key will cause DP to be active in either DTMF mode or pulse mode.
HKS
PD
37
BM
B/M
PD
38
MODE
MODE
39
DP
DP
Rev. A1, 31-May-99
Preliminary Information
E EE EE
3.4V 0.8V
SSO44 31
Symbol RCK
Function RC clock oscillator for ringer
Configuration
E E
DP
VL
7 (20)
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AA A A A AAA AA A A AA A AA A A A AAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AA A AA A A A AAA AA A A A AAA AA A AAAAAAAAAAAAAAAAAA A A A A AA A A A A A A AA A A A AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA A A A A AA A AAAAAAAAAAAAAAAAAA A A A AA A A A
D :/T: : and pulse-to-tone key D R/P: Redial and pause function key D F1, F2, F3: Flash keys
1.
AAAAA A A A AA AAAAAAAAAAAAAAAAAAAAAA AAA AA AAAAA A A A AA AAAAAAAAAAAAAAAAAAAAAA AAA AA AAAAAAAAAAAAAAAAAAAAAA AAA AA AAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AA AAAAAAAAAAAAAAAAAAAAAA AAA AA AA AAAAAAAAAAAAAAAAAAAAAA AAA AA AAAAAAAAAAAAAAAAAAAAAA AAA AA AAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAA AAA AAAAAAAAAAAAAAAAAA AA AA AA
:/T
C1 1 4 7 C2 2 5 8 0 C3 3 6 9 # F1 F2 F3 R/P
The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it executes the pause function.
Redialing
2.
Normal Dialing
Keyboard Operation
U3760MB-N
8 (20) SSO44 41 OFF HOOK 44 43 42 OFF HOOK Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits. D1, D2, ..., Dn will be dialed out. Symbol R1 R4 R3 R2 , D1 , Keyboard input D1 , D2 , , ..., D2 Function Dn , ..., BUSY, Come Dn ON HOOK
Preliminary Information
R4 R3 R1 R2
Configuration
,
R1 R2 R3 R4
OFF HOOK
PD
PD
PD
PD
Rev. A1, 31-May-99 , R/P
U3760MB-N
HKS
10626
KEY IN
3
2
R/P
tKID DP tPDP MUTE
tPDP
tKID
tIDP
tB tM
tIDP
tPDP
KT
LOW MFO
OSC ON HOOK
Oscillation OFF HOOK Normal dialing
Oscillation Auto dialing
Figure 2. Pulse mode
10627
HKS
KEY IN tKID tKRD tKRD tKID tITP MFO tTD MUTE tITP tITP
LOW KT HIGH DP
OSC
Oscillation
Oscillation
Figure 3. DTMF mode normal dialing
Rev. A1, 31-May-99
9 (20)
Preliminary Information
U3760MB-N
10628
HKS
KEY IN tKID
R/P
MFO tTD tITP tITP
MUTE
LOW KT DP HIGH
OSC
Oscillation
Figure 4. DTMF auto dialing
10 (20)
Rev. A1, 31-May-99
Preliminary Information
U3760MB-N
Access Pause
A A A AA A AA A AA A A A AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A A A AA A AA A AA A A A AA A AA A AA A A AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A A A AA A AA A AA AAAAAAAAAAAAAAAAAAAAAAAA A A AA A AA A AA A
OFF HOOK , D1 , D2 , R/P , D3 , ..., Dn' 1. 2. The pause function can be stored in memory. The pause function is executed in normal dialing and redialing.
10629
HKS
KEY IN
4
2
R/P
2
tKID DP tPDP tIDP
M
tB tM
tIDP
tPDP
tIDP
MUTE tP
KT LOW MFO Oscillation OSC
Figure 5. Pause function
Rev. A1, 31-May-99
11 (20)
Preliminary Information
U3760MB-N
Pulse-to-Tone (:/T)
A A A A AA A A A A A AA AA A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A AA A A A A A AA AA A AA A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A AA A A A A A AA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A AA A A A A A AA AA A A A AA A A A A A AA AA A A
OFF HOOK , D1 , D2 , ..., Dn ,
:/T
,
D1'
,
D2'
, ...,
Dn'
1.
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 only by going on-hook.
HKS
10630
KEY IN
4
2
*/T
8
tKID DP tIDP tIDP
tPDP MUTE
tB tM
tP
KT
MFO
OSC
Oscillation
Figure 6. Pulse-to-tone operation
12 (20)
Rev. A1, 31-May-99
Preliminary Information
U3760MB-N
A A A A A A A AAA A A A A A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A AAA A A A A A A A A A AAA A A A A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A AAA A A AAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A AAA A A A A AAAAAAAAAA A A A A AAAAAAAAAA A A A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA A AAAAAAAAAA AAAAAAAAAA A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAA
AAA A A A AAA A A A AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA AAA AA A AAAAAAAAAA AAAAAAAAAA AA
OFF HOOK , Fn 1. 2. OFF HOOK , Fn LNB = D1, D2, D3, ..., Dn OFF HOOK , D1 LNB = D3, ..., Dn
HKS KEY IN F tKID DP MFO MUTE KT OSC
Flash (F1 or F2 or F3)
The flash key cannot be stored as a digit in memory. The flash key has first priority among the keyboard functions. The system will return to the initial state after the flash pause time is finished.
,
D1
,
D2
,
D3
, ...,
Dn
,
D2
,
Fn
,
D3
, ...,
Dn
10631
4
tFB
tFP
tTD
tITP
LOW
Oscillation
Figure 7. Flash operation
tKID tKRD tPDP tIDP tTD
= key active in debounce = key release debounce = pre-digit pause = inter-digit pause = DTMF output duration
tITP tFB tFP tP
= intertone pause = flash break time = flash pause time = pause time
Rev. A1, 31-May-99
13 (20)
Preliminary Information
U3760MB-N
Absolute Maximum Ratings
Parameters Line current DC line voltage Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60C SSO44 SDIP40 Junction ambient SSO44 SDIP40 RthJA 70 50 k/W Symbol IL VL Tj Tamb Tstg Ptot Value 140 14 125 - 25 to + 75 - 55 to + 150 0.9 1.3 Unit mA V C C C W
Electrical Characteristics Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mVrms, RDC = 39 / 1 W, Tamb = 25C, unless otherwise specified Parameters Line voltage Test Conditions / Pin IL = 5 mA IL = 20 mA IL = 30 mA IL = 73 mA Ri IL = 20 mA, S5 = open RAGC = 12 kW, IL = 73 mA IL > 20 mA, GS = 48dB IL Symbol VL Min. 1.2 Typ. 4.0 4.5 6.4 Ri Gs no GSTA 10 1.3 -8 1 15 45 46.8 - 4.8 80 47.8 -6 120 48.8 -7 - 72 20 Max. 1.5 Unit V V V V k dB dB dBmp dB dBm dBm dB
Transmit and sidetone Input resistance Gain Line-loss compensation 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 Line-loss compensation Receiving noise at earphone weighted psophometrially Gain change when muted Output voltage push-pull
DGs
y 20 mA w
Single tone, IL 20 mA IL = 20 mA, S5 = closed PPRE = PHLG - PLLG, S5 = closed
VL VL PPRE
-4 3
IL 20 mA IL = 73 mA IL = 73 mA
w
DGR
ni
GR
3 - 4.7
-6 - 77.5
5 -7 - 71
dB dB dBm
IL 20 mA IL 20 mA, Zear = 68 nF, 100 W in series Supply voltage (for internal use only) Output voltage IL 20 mA dialing mode
y y
GRM VRECO
24 0.8
29 0.9
34
dB VRMS
y
VDD 1
2.3
6.3
V
14 (20)
Rev. A1, 31-May-99
Preliminary Information
U3760MB-N
DC Characteristics Dialer
VDD2 = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9b Parameters Memory rentention current Pre-emphases DTMF distortion DP output sink current Keyboard input drive current Keyboard input sink current Keyboard resistance Key tone output current Key tone frequency Test Conditions / Pins HKS = 1, VDD2 = 1.0 V Column/Row RL = 5 kW VPO = 0.5 V VI = 0 V VI = 2.7 V Symbol IMR d IPL IKD IKS 0.5 30 200 400 Min. 1 Typ. 2 - 30 Max. 0.2 3 - 23 Unit
mA mA mA
dB dB mA
t = 50 ms
1240
"1
5
kW mA Hz
AC Characteristics Dialer
Parameters Keypad active in debounce Key release debounce Pre-digit pause Inter-digit pause ( auto dialing ) Make/break ratio DTMF output duration Inter-tone pause Flash break time F1 F2 F3 Flash pause time Test Conditions / Pins Symbol tKID tKRD tPDP tPDP tIDP tIDP M/B tTD tITP tFB Min. Typ. 20 20 40 33.3 800 500 40:60 33:67 87 87 94 250 600 1.0 3.6 Max. Unit ms ms ms ms ms ms % % ms ms ms ms ms s
B/M pin = floating 10 ppS B/M pin = low 10 ppS 20 ppS B/M pin = floating B/M pin = low Auto dialing Auto dialing R1 grounded R2 grounded R3 grounded F1 F2 F3
tFP tP
Pause time
Rev. A1, 31-May-99
15 (20)
Preliminary Information
U3760MB-N
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 Test Conditions / Pins VRIAC = 20 V VRIAC VRIAC R = 150 k, C = 1 nF VRIAC > VRON Symbol IRING VRon VRoff f1H f1L f2 toff C R 937 752 Min. 2.1 Typ. Max. 3.8 Unit mA V V 1083 868 Hz Hz ms pF kW
23.5 5.6 1010 808 12.5 65
Audio sequence frequency Turn-off delay Range of external compog p nents for R/C oscillator
See figure 8
1000 50
2200 330
Volt VRING 0
12459
t
VRIAC 0 t
OUT Melody t 0 toff
Figure 8. Turn off delay time
16 (20)
Rev. A1, 31-May-99
Preliminary Information
a TO TESTER S9
I/O IN IN
S5 220UF S6 MIC1 S6 MIC2 MFO 10K
220NF
S8
IDC
Rev. A1, 31-May-99
Basic Test Circuit
ab TO TESTER
OUT I/O IN I/O
VMIC AC DC
TO TESTER 1 100NF 8.2K
AC 100MV VGEN 1UF 600 IL S7 100UF VGEN 300MV/1KHZ
VDD
25K
25K
b VDD1
CLOCK
S11 1
BM KT DP MODE HKS XT
VDD2
MICO
TIN VL
1.5K
VL 13V
ST
4.7K 47NF
2.2NF 620
S11 3.58 MHZ TO TESTER
IN IN IN IN IN IN IN I/O
XT C1 C2 C3 R1 R2 R3 R4 MUTE
RECIN VI RECO1 100UF VRECO RECO2 330 AGC RDC VBG VRING VRIAC OUT THA DC DC 68NF 39 12K 2.2UF
U3760MB
AC
12460
E
Preliminary Information
17 (20)
U3760MB-N
S1
47NF 1NF 150K
PRIVACY RCK GND2 GND1
VRING VRIAC
U3760MB-N
Formulas for Parameters of Elecrtrical Characteristics of Speech Circuit
Formulas referred to the basic test circuit. If not otherwise specified switches in basic test circuit are inactive.
Transmit gain GS
+ 20
log
VL VMIC
VMIC = 3 mV/1 kHz, S5 = open
Receiving gain GR
+ 20
log VRECO VL
RX-mode: VGEN = 300 mV/1 kHz, S7b
Line loss compensation transmit DGS GS(at IL 73 mA)-GS(at IL
+
+
+ 20 mA)
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Sidetone reduction GSTA
+ 20
log
VL (in TX-mode) VRECO
) GR
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Line loss compensation receive DGR GR(at IL 73 mA)-GR(at IL
+
+
+ 20 mA)
RX-mode: VGEN = 300 mV/1 kHz, S7b
Gain change when muted GRM
+ 20
log VRECO (Mute VL
+ inactive)-20
log VRECO (Mute VL
+ active)
VGEN = 100 mV/1 kHz, S5 = open, S8 = open
Input impedance of microphone amplifier 50 k Ri
+
VL (s6
VL(S6
+ closed) -1 + open)
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
18 (20)
Rev. A1, 31-May-99
Preliminary Information
U3760MB-N
Package 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
Rev. A1, 31-May-99
19 (20)
Preliminary Information
U3760MB-N
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
20 (20)
Rev. A1, 31-May-99
Preliminary Information

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