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

W91473 SERIES
AC CHARACTERISTICS
PARAMETER
SYMBOL CONDITIONS MIN. TYP. MAX. UNIT
Keypad Active in Debounce
TKID
-
-
20
-
mS
Key Release Debounce
Pre-digit Pause¹
Pre-digit Pause²
TKRD
TPDP1
10 ppS
TPDP2
20 ppS
-
M/B = 2/3
M/B = 1/2
M/B = 2/3
M/B = 1/2
-
20
-
mS
-
40
-
mS
- 33.3 -
-
20
-
mS
- 16.7 -
Interdigit Pause (Auto dialing)
TIDP
10 ppS
20 ppS
-
800
-
mS
-
500
-
Make/Break Ratio
M/B
M/B = 2/3
- 40:60 -
%
M/B = 1/2
- 33:67 -
Tone Output Duration
TTD
Auto Dialing
-
93
-
mS
Intertone Pause
TITP
Auto Dialing
-
93
-
mS
-
98
-
Flash Break Time
TFB
-
-
305
-
mS
-
600
-
Pause Time
TP
-
-
3.6
-
S
Key Tone Frequency
FKT
-
-
600
-
Hz
Key Tone Duration
TKTD
-
-
35
-
mS
One-key Redialing Pause Time TPR
-
-
600
-
mS
One-key Redialing Break Time
TRB
-
-
2.2
-
S
First key-in Pause Time
TFKP
-
-
600
-
mS
Notes:
1. Crystal parameters suggested for proper operation are Rs < 100Ω, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,
FOSC. = 3.579545 MHz ±0.02%.
2. Crystal oscillator accuracy directly affects these times.
TIMING WAVEFORMS
- 14 -