UM91S31 Search Results

UM91531

Abstract: 7662 RS-470 circuit diagram of dtmf generator 7662x
Contextual Info: UMC UM91S31 Parallel Input Tone/Pulse Dialer Features • 4-bit parallel data input from microcomputer. ■ TTL compatible inputs and outputs. ■ Uses TV crystal standard 13.58 MHz to derive all frequen­ cies, providing high accuracy and stability. ■ Operating voltage: 2.5 to 5.5 Volts.

Contextual Info: UM C UM 91531 Parallel Input Tone/Pulse Dialer !!!?!: Features • DTMF signaling of 1 ,2 , 3, 4, 5, 6, 7, 8, 9, 0, * , #, A, ■ 4-bit parallel data input from microcomputer ■ T T L compatible inputs and outputs B, C and D ■ Uses T V crystal standard 3.58 MHz to derive all

um91531

Abstract: tone pulse dialer chip for generating 10 Mhz sine wave NPN/transistor C 331 RS-470 TRANSISTOR D 471 um9153 speed dial circuit
Contextual Info: L J IV I «=^ UM91531 Parallel Input Tone/Pulse Dialer Features • 4-bit parallel data input from microcomputer D TM F signaling of 1 , 2 , 3 , 4 , 5, 6 , 7, 8, 9 , 0, * , # , A , ■ T T L compatible inputs and outputs B , C and D ■ Uses T V Pulse signaling 0-E