W91570DN SERIES
- 20 -
AC Characteristics, continued
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Auto Redialing
T
ARB
ARD = V
DD
-
4
-
S
Break Time
ARD = V
SS
-
30
-
Auto Redialing
T
APR
ARD = V
DD
-
1
-
S
Pause Time
ARD = V
SS
-
1
-
Auto Redialing
T
WI
ARD = V
DD
-
25
-
S
Waiting Interval
ARD = V
SS
-
30
-
LCD Frame Frequency
F
LCD
-
-
32
-
Hz
RTC DC CHARACTERISTICS
(V
RTC
= 1.5V, V
SS
= 0V , F
OSC
. = 32,768 Hz, T
A
= 25
°
C, all outputs unloaded.)
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply Voltage
V
RTC
-
1.2
1.5
1.8
V
Supply Current
I
RTC
No Load
-
2.0
4.0
µ
A
OSC. Starting Time
T
OSC
-
-
-
3
S
OSC. Output Built-in Cap.
C
O
Cl = 12.5
pF
-
25
-
pF
OSC. in Trimmer Cap.
C
TRIM
-
5
-
35
pF
Frequency Stability
∆
f/f
V
DD
−
V
SS
= 1.3
to 1.6V
-
-
1
ppM
SET
RTC
Input High Voltage
V
SETH
-
V
DD
-0.3
-
V
DD
V
SET
RTC
Input Low Voltage
V
SETL
-
V
SS
-
V
SS
+0.3
V
Notes :
1. Crystal parameters suggested for proper operation are Rs < 100
Ω
, Lm = 96 mH , Cm = 0.02 pF , Cn = 5 pF , Cl = 18 pF, and
Fosc. = 3.579545 MHz
±
0.02%
2. Crystal oscillator accuracy directly affects these times.
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