W91580 Datasheet, PDF (15/19 Pages) Winbond – 24-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE AND HOLD FUNCTIONS

W91580 SERIES
Timing Waveforms, continued
HKS
HFI
H KEY
HFO
OFF HOOK
ON HOOK
T/P MUTE
HPM MUTE
HIGH
LOW
CHIP ENBLE
Note: H KEY cannot be enabled when chip is disabled.
Figure 3(a).
HKS
HFI
H KEY
HFO
OFF HOOK
T/P MUTE
HIGH
HPM MUTE
CHIP ENBLE
Figure 3(b).
Note: The HFI and H KEY inputs will toggle the HFO signal; as soon as either HFI or H KEY is activated, the HFO signal
will go high and previous inputs will be ignored.
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Publication Release Date: Auguest 1995
Revision A3