Preliminary W91312N
DC Characteristics, continued
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX.
UNIT
KD
I
Keypad Input Drive Current
Keypad Input Sink Current
Keypad Resistance
I
V = 0V
30
200
-
-
400
-
-
-
m
A
KS
I
I
V = 2.5V
m
A
5.0
W
K
AC CHARACTERISTICS
PARAMETER
Keypad Active in Debounce
Key Release Debounce
Pre-digit Pause1
SYMBOL
CONDITIONS
MIN. TYP. MAX.
UNIT
mS
KID
T
-
-
-
-
-
-
-
20
20
-
-
-
-
-
-
-
KRD
T
mS
PDP
T
1
B/M = 1
B/M = 0
B/M = 1
B/M = 0
10 ppS
40
mS
10 ppS
33.3
20
Pre-digit Pause2
2
mS
mS
PDP
T
20 ppS
16.7
800
IDP
Interdigit Pause (Auto
dialing)
T
20 ppS
B/M = 1
B/M = 0
Auto Dialing
Auto Dialing
F1
-
-
-
-
-
-
-
-
-
-
-
-
500
40:60
33:67
100
100
600
100
300
73
-
-
-
-
-
-
-
-
-
-
-
-
Make/Break Ratio
M/B
%
TD
DTMF Output Duration
Intertone Pause
T
mS
mS
mS
ITP
T
FB
T
Flash Break Time
F2
F3
F4
FP
T
Flash Pause Time
Pause Time
-
1.0
S
S
P
T
Pause 1
Pause 2
3.6
2.0
Notes:
1. Crystal parameters suggested for proper operation are Rs < 100 , Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,
W
FOSC. = 3.579545 MHz 0.02%.
±
2. Crystal oscillator accuracy directly affects these times.
- 6 -
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