FX623 Datasheet, PDF (4/6 Pages) List of Unclassifed Manufacturers – Call Progress Tone Decoder

Application Information
Decoder Timing
V_DD
PURS
t _PURS
SIGNAL IN NOTONE
t _DE
OUTPUTS
Q0 to Q3
DATA CHANGE
HOLD
Tone 1
t _RESP
Tone 2
t _DC
t _HOLD
Tone 3
Tone ’N’
NOTONE
t _NT
’N’
t _PUL
t _NORM
Fig.3 Timing with the Chip Select Input Held “Low”; CS and IRQ are not used
V_DD
PURS
t _PURS
SIGNAL IN
NOTONE
Tone 1
OUTPUTS
Q0 - Q3
E
(INTERNAL)
DATA CHANGE
IRQ
CS
DATA OUT Q0 - Q3
TRI-STATE
F
1
t _RIRQ
t _IR
t _ACS
VALID DATA
(READ DATA)
t _HIZ
TRI-STATE
VALID DATA
(READ DATA)
Fig.4 Timing with the HOLD Input Held “High”; CS and IRQ are used
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