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W91572DNF

23-MEMORY TONE/PULSE DIALER WITH AUTOREDIAL RTC AND LCD DISPLAY FUNCTIONS

Winbond 

W91570DN SERIES

AC Characteristics, continued

PARAMETER

Auto Redialing

Break Time

Auto Redialing

Pause Time

Auto Redialing

Waiting Interval

LCD Frame Frequency

SYMBOL

TARB

TAPR

TWI

FLCD

CONDITIONS

ARD = VDD

ARD = VSS

ARD = VDD

ARD = VSS

ARD = VDD

ARD = VSS

-

MIN.

-

-

-

-

-

-

-

TYP.

4

30

1

1

25

30

32

MAX.

-

-

-

-

-

-

-

UNIT

S

S

S

Hz

RTC DC CHARACTERISTICS

(VRTC = 1.5V, VSS = 0V , FOSC. = 32,768 Hz, TA = 25° C, all outputs unloaded.)

PARAMETER

SYMBOL CONDITIONS

MIN.

TYP.

MAX. UNIT

Supply Voltage

VRTC

-

1.2

1.5

1.8

V

Supply Current

IRTC

No Load

-

2.0

4.0

µA

OSC. Starting Time

TOSC

-

-

-

3

S

OSC. Output Built-in Cap.

CO

Cl = 12.5 pF

-

25

-

pF

OSC. in Trimmer Cap.

CTRIM

-

5

-

35

pF

Frequency Stability

∆f/f

VDD−VSS = 1.3

-

-

1

ppM

to 1.6V

SET RTC Input High Voltage VSETH

-

VDD -0.3

-

VDD

V

SET RTC Input Low Voltage

VSETL

-

VSS

-

VSS +0.3 V

Notes :

1. Crystal parameters suggested for proper operation are Rs < 100Ω, 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.

- 20 -

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