W91590A View Datasheet(PDF) - Winbond

Part Name

Description

MFG CO.

W91590A

24-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE, HOLD AND LOCK FUNCTIONS

Winbond 

W91590 SERIES

Timing Waveforms, continued

HKS

HFI

H KEY

HFO

ON HOOK

T/P MUTE

HPM MUTE

CHIP ENBLE

HIGH

Figure 3(c).

Note: Changing the state of the HKS signal from high to low will initialize the HFO and HPM MUTE signals.

HKS

LOW

KEY IN

DP

R

TKID

TRB

TIDP

TPDP

TIDP

T/P MUTE

HPM MUTE

KT

DTMF

OSC.

TFKP

LOW

OSCILLATION

Figure 4. Pulse Mode One-key Redialing Timing Diagram (when not first key)

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Publication Release Date: July 1995

Revision A3

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