Line- Powered Call Progress Detector
4
Application Information - Decoder Timing
MX623 Preliminary Information
VDD
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
Figure 3 - Timing with the Chip Select Input Held “Low”; CS and IRQ are not used
VDD
PURS
t PURS
SIGNAL IN
NOTONE
Tone 1
OUTPUTS
Q0 - Q3
E
F
1
(INTERNAL)
DATA CHANGE
IRQ
t RIRQ
CS
DATA OUT Q0 - Q3
TRI-STATE
t IR
t ACS
VALID DATA
(READ DATA)
t HIZ
TRI-STATE
Figure 4 - Timing with the HOLD Input Held “High”; CS and IRQ are used
VALID DATA
(READ DATA)
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