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BL1102series
Description BL1102 Series is a single chip dialer IC using Si-gate CMOS process, it can provide signal for either Pulse or double Tone with multi-frequency dialing. It features key tone and hands-free dialing, "0,"9" dialing latch with first number, 2array 32-digit number memory re-dialing, and 13-array 16-digit number memory etc.
Features
Operating voltage: 2.0 ~ 5.5V Double Tone/Pulse selection with switch, pulse can be switched to double tone by pressing*/T key. 3.579545MHz crystal or ceramic resonator is used Power on reset on chip Minimum tone output duration: 100 ms 2 arrays of 32-digit number memory used for re-dialing and memory dialing respectively 3 arrays of 16-digit number single key dialing memory 10 arrays of 32-digit number double key dialing memory Pulse break/make ratio can be 3/2 or 2/1, both alternative, and pulse speed is 10PPS Flash Time: 98ms, 305ms, 6000ms Minimum tone output width: 93ms, minimum tone interval: 93ms Key tone output used for confirming the key pressed is right Pulse, PT (Pulse to Tone) can be stored as a digit in memory Easy operation with one-key redial, memory, pause and etc. Standard 5x5 keyboard used Key "Mute" used for mute talking The dial-out staring with number "0" or "9"can be locked and chosen by pin. CD-operating key 20 and 24 PDIP plastic Package
Application Used as dialing circuit in telephone, complete relevant functions.
Block Diagram
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BL1102series
Known from the above block diagram, it mainly made up of system clock generator, keyboard interface, data code, random storing, read/write counter, address lock and storing, system control logic, pulse generator, data/mode converter and double tone generator and other circuits. Pin Description
Symbol Row/colum n input X T,X T T/P MUTE 22 Pin 1-4,1822 6,7 8 24 Pin 1-4,2024 6,7 8 I/0 O I/0 I Function A valid key entry is defined by a single row being Connected to a single column Oscillation I/O The T/P MUTE is a conventional CMOS N-channel
open drain output. When dialing and flash, the output is and will turn down the talking network.
Dialing mode selection.. When pin is connected to VSS, it is double tone multi-frequency mode when it is connected to VDD; it is pulse mode (10ppS). The pin is the hook switch input HKS =1, on HOOK state, chip in sleeping mode, no operation. HKS =0, on HOOK stateenable chip on normal operation. Break/make ratio, pin selection. B/M=1, ratio is 60/40; B/M=0, ratio is 66/33. Power and power ground input Inverter output. Dialing under double tone mode, pin is high voltage dialing under pulse mode, the if pin is low voltage. Hands-free control details can be seen in table2. Key tone signal output. The frequency is1.2KHz. Once the pin is locked, dialing starting with "0" or "9" and all the key input afterwards will become invalid. It will recover the original state after on hook LOCK Pin Function VDD "0""9"dialing lim it Floating Normal VSS "0"dialing lim it Not available The DP/C5 is a conventional CMOS N-channel open drain output. Under tone state. Output will keep high; Under pulse state, output dialing pulse. Double tone multifrequency signal output
MODE
14
16
I
HKS
9
9
I
B/M VDD, VSS X MUTE HFI, HFO KT
16 1 7, 5 13 -12
18 19, 5 15 1213 14
I I O I/O O
LOCK
15 (BL1102L)
17 (BL1102AL)
I
NC DP / C5
15 (BL1102) 10
17 (BL1102A) 10
I O
DTMF
11
11
O
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BL1102series
Table1. Circuit Function
Type
Pulse (PPS)
10 10 10 10
Flash (ms)
98 / 305 / 600 98 / 305 / 600 98 / 305 / 600 98 / 305 / 600
Break/Make Ratio (B/M)
Hands-free
Lock Control N N Y Y
Assembly (PDIP) 22 24 22 24
BL1102 BL1102A BL1102L BL1102AL
Pin Selection
Pin Selection Pin Selection Pin Selection
N Y N Y
Table 2
Hook switch Current State HFO Low High High Low High input HFI HFI HFI Off hook on hook On hook Next State Hands-free output dialing ( HFO ) High Y Low Low Low Low High Y Y Y
On hook ( HKS=1) Off hook ( HKS=0) On hook ( HKS=1) off hook ( HKS=0) off hook ( HKS=0)
Function Description Keyboard Operation
R1 R2 R3 R4 R5 C1 1 4 7 */T RD C2 2 5 8 0 S C3 3 6 9 # A C4 EM1 EM2 EM3 SAVE P DP/C5 MUTE CD F1 F2 F3 MUTE: mute on/off P: pause CD: call disconnect RD: one-key redial S: double-key store A: * /T: *&PT key EM1-EM3: 16 digit emergency number store disconnect SAVE: 32 F1, F2, F3: flash time 98/305/600ms store
#: Invalid under pulse state while refer to double tone multifrequency of the corresponding row and column
Genera l Dialing
b . Dialing length is unlimited, but the re-dial is inhibited if it oversteps 32 digits Re-dialing
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"Pause" key operation
a . Pause function can be stored in memory storage. b . Pause function can be performed when general dialing or re-dial or memory dialing. pulse tone mode convert ( * / T )
a . If mode switch is set as pulseoutput signal will be D1D2...Dnpause (3.1 minutes) D1', D2', ...Dn' ( pulse ) ( tone ) b . If the mode switch is set as tone, output signal will be D1D2... Dn*/TD1', D2'...Dn'
( tone ) ( tone ) ( tone ) c . If the tone mode remains since the number is dialed out, pulse mode can be recovered as long as do on-hook operation.
FLASH
a . "flash" key can not be stored in the memory , but it enjoys the most high priority in all keyboard functions. b . after pressing " flash" keydialer will recover to the original status. Number Storage
a . Dialing out D1D2... Dn first, then press the storage key S b . D1D2...Dn numbers are stored in the position " Mn or Ln"and dialed out.
a . D1, D2...Dn are stored in Mn or L n but will not be dialed out. b . P and * / T key can be stored in the memory as one digit P key indicates "pause".
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BL1102series
c . Once the storage function is finished or the state of hook switch changesthe storage mode will be released. Memory dialing a . One-key dial
b . Two-key dial
"Save" Key
a. will be stored in the memory. b. will be dialed out. CD Press CD one pulse output will make call disconnected and make the system recover to the original status. MUTE
Press " MUTE", mute output will be generated. Mixed dialing
Dialing with "Save" key is valid only being first pressed after off hook, and the second serial numbers can be dialed after the number is sent out. Absolute Maximum Rating
Parameter DC Supply Voltage Symbol VDD ~ VS S VIL Input / output Voltage VIH VDL VDH Power-Dissipation Operating Temperature Storage Temperature PD TOPR TSTG Rating -0.3 ~ +7.0 VSS-0.3 VDD+0.3 VSS-0.3 VDD-0.3 120 -20 ~+70 -55 ~+150 Unit V V V V V mW
oC oC
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BL1102series
DC Characteristic ( VDD -VSS=2.5VFosc=3.58MHzTa=25 C, all output unloaded except for being indicated.)
O
Parameter Operating voltage
Symbol VDD
Test Condition tone pulse memory tone pulse HKS1 , Ta=450OC VDD = 1.0V HKS0 N loaded and N input
Min. 2.0 2.0 1.0
Typical
Max. 5.5 5.5 5.5
Unit V
Operating current Memory retention current Standby current
IOPT IOPP IMR ISB
0.6 0.2 0.1 0.1
2.0 0.5 0.2 5
mA A A
DTMF output voltage Pre-emphasis DTMF distortion tone output outer loading resistance tone output DC voltage tone output sink current pulse output drive current T/P mute output drive /sink current mute output drive / sink current XMT T/P mute drive/sink current voltage input low level voltage input high level key input drive/sink current Pin control input
Vto
Row group RL=5K Column/row group VDD = 2.0 ~ 5.5V
130 1
150 2 -30
170 3 -23
mVrms dB dB K
THd RL VDC ITC IPC IMH I ML IKH I KL ILH I LL VIL VI H IKD I KS IIS
RL=5K TMD (-23dB) VDD = 2.5~5.5V VTO = 0.5V VPO = 0.5V VMO = 2.0V VMO = 0.5V VKO = 2.5V VKO = 0.5v VLO = 2.0V VLO = 0.5V
5 1.1 0.2 0.5 -0.5 0.5 -0.5 0.5 -0.5 0.5 GND 0.7VDD 0.3VDD VDD 30 400 2.5 80 2.8
V mA mA mA mA
mA
V A A
VI= 0V VI= 0V HKSMODE ,M/B
10 200
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BL1102series
AC characteristic
Parameter Time of keyin debounce Time of key release debounce Time of key tone defer Time of One-key re-dial "pause" Time of pulse T/P mute defer Pre-digit pause pulse speed Time in data pace (auto-dial) Break/make ratio Tone width Inter tone pace Time of flash pause Time of Pause Row -group frequency Symbol TKID TKRD TKD TRB TMD TPDP FPR TTD B/M TTD TTD TFB TP F1 F2 F3 F4 F5 F6 F7 Fkt TPR B/M=1 B/M=0 Automatic dialing Automatic dialing B/M=1 B/M=0 B/M=1 B/M=0 Test Condition Min. ----------------Typical 20 20 20 2.2 40 33.3 40 33.3 10 800 60:40 66.6:33.3 93 93 98 305 600 3.1 699 766 848 948 1216 1332 1472 1.2 600 Max. ----------------Unit ms ms ms s ms ms pps ms % ms ms ms s Hz
Column-group frequency Key tone frequency Time of one-key re-dial pause NB:
row1 row2 row3 row4 column1 column2 column3 ---
Hz --kHz ms
1 . If it is operated on the following normal situation, the oscillation parameters are recommended as: Rs < 100 , Lm: 96mH , Cm :0.02pF, Cn:5pF, C1:18pF OSC : 3.57945 Mhz 0.02 % 2 . the accuracy of oscillator frequency will effect the above -mentioned times.
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BL1102series
Timing Diagram
Pulse mode normal dialing timing diagram Tone mode normal timing diagram
Tone mode redial timing diagram
hands-free control function timing
Pulse mode timing diagram
Pause function timing diagram
General dial: pulse tone (PT) transfer timing diagram Flash function operation timing diagram
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BL1102series
"Mute" key function operation timing diagram
Application Circuit
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