IL91214A

TECHNICAL DATA www.DataSheet4U.com IL91214A/B Tone/Pulse Dialer with Flash Function IL91214A and IL91214B are tone/pulse dialers designed for providing standard DTMF or pulse signals. The ICs enable to: - generate standard DTMF or pulse signals of dialing as well as “flash” pulses; - store and redial last number; - generate pause in the transmitted package of dial signals; ICs are designed to be used in telephone sets. D SUFFIX SOIC ORDERING INFORMATION IL91214A/BN Plastic IL91214A/BD SOIC TA = -20° to 70° C for all packages R1 KEYBOARD LOGIC R4 C1 C3 REDIAL MEMORY 32 DIGITS OUTPUT LOGIC DP KT XMIT MUTE MODE OUT VDD DTMF GENERATOR TONE MODE IN HK OSCI OSCO INPUT LOGIC CONTROL LOGIC OSC. Fig. 1. Block diagram. IL91214 A, IL91214B www.DataSheet4U.com PIN DESCRIPITION Pin # HK M O D E IN 01 02 16 15 R4 R3 R2 R1 C3 C2 C1 DP A B Designation HK MODE IN Description Hook switch input MODE IN = VDD: pulse mode, 10 Hz, М/В = 1/2, MODE IN = VSS: tone mode, MODE IN = floating mode, 20 Hz, М/В = 1/2 Oscillator input Oscillator output Ground Supply output Tone dialing output Dialing transmission mute output Mode output pin Key-in tone output Dialing pulse output Keyboard column input Keyboard column input Keyboard column input Keyboard row input Keyboard row input Keyboard row input Keyboard row input O SCI 03 O SCO 04 IL91214A 1 2 1 2 14 13 12 11 Vss 05 Vdd 06 TO NE 07 X M IT M U T E 10 09 08 3 4 5 6 7 8 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 HK 01 MODE...