IDT1338

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM

RTC

IDT®

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 5

IDT1338

REV K 032910

Power Control

A precise, temperature-compensated voltage reference and

a comparator circuit provides power-control function that

Table 1. Power Control

Power-up/down Timing

Table 2. Power-up/down Characteristics

Ambient Temperature -40 to +85° C

Note

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

occurs.

Supply Condition

Read/Write

Access

Powered

By

No

No

Yes

Yes

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Recovery at Power-up

(see note below)

2

ms

300

µs

0

µs