Tone/pulse Dialer
TECHNICAL DATA
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Tone/Pulse Dialer with Handsfree Control and Flash Function
IL91214A and IL91214B a...
Description
TECHNICAL DATA
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Tone/Pulse Dialer with Handsfree Control and 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.
PIN DESCRIPTION
HK MODE IN OSCI
01 02
16 15
R4 R3 R2 R1 C3 C2 C1 DP
Pin # 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
03
14
OSCO 04
Vss 05 Vdd TONE
1 2
1 2
IL91214A
13 12 11
10 09
06
07
08
XMIT MUTE
HK MODE IN
01 02
18 17 16
R4 R3 R2 R1 C3 C2 C1 DP
3 4 5 6 7 8 9 10 11 12 13 14 15 16
OSCI 03 OSCO 04
15
14 13 12
Vss 05 Vdd 06 TONE 07
XMIT MUTE
08
11 10
MODE OUT 09
KT
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
OSCI OSCO VSS VDD TONE XMIT MUTE MODE OUT KT DP C1 C2 C3 R1 R2 R3 R4
Fig. 1. Pin configuration in package
IL91214B
1
IL91214 A, IL91214B
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R1 KEYBOARD LOGIC R4 C1 C3 R...
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