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 pressedis right
Pulse, P→T (Pulse to Tone) can be stored as a digit in memory
Easy operation with one-key redial, memory, pause and etc.
Standard 5×5 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