1339-31DCGI8 参数 Datasheet PDF下载

IDT1339

REAL-TIME CLOCK WITH SERIAL I

2

C INTERFACE

RTC

Table 1. Power Control

Supply Condition

V

CC

< V

PF

, V

CC

<

V

BACKUP

V

CC

< V

PF

, V

CC

>

V

BACKUP

V

CC

> V

PF

, V

CC

<

V

BACKUP

V

CC

> V

PF

, V

CC

>

V

BACKUP

Read/Write

Access

No

No

Yes

Yes

Powered

By

V

BACKUP

V

CC

V

CC

V

CC

Power-up/down Timing

Table 2. Power-up/down Characteristics

Ambient Temperature -40 to +85° C

Parameter

Recovery at Power-up

V

CC

Fall Time; V

PF(MAX)

to V

PF(MIN)

V

CC

Rise Time; V

PF(MIN)

to V

PF(MAX)

Symbol

t

REC

t

VCCF

t

VCCR

Conditions

(see note below)

Min.

300

0

Typ.

Max.

2

Units

ms

µs

µs

Note:

This delay applies only if the oscillator is running. If the oscillator is disabled or stopped, no power-up delay

occurs.

IDT®

REAL-TIME CLOCK WITH SERIAL I

2

C INTERFACE

5

IDT1339

REV K 032910