W91473 Datasheet, PDF (16/20 Pages) Winbond – 14-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE AND LOCK FUNCTION

W91473 SERIES
HKS
HFI
H KEY
HFO
OFF HOOK
ON HOOK
T/P MUTE
HPM MUTE
HIGH
LOW
CHIP ENBLE
Figure 3(a).
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Note: The H KEY cannot be enabled when chip is disabled.
HKS
OFF HOOK
HFI
H KEY
HFO
T/P MUTE
HIGH
HPM MUTE
CHIP ENBLE
Figure 3(b).
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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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