1338-31DCGI IDT, 1338-31DCGI Datasheet - Page 5

• Manufacturer Part Number: 1338-31DCGI
• Description: Real Time Clock .9RTC BASE
• Manufacturer: IDT

Specifications of 1338-31DCGI

• Rohs: yes
• Part # Aliases: IDT1338-31DCGI

Power Control
A precise, temperature-compensated voltage reference and
a comparator circuit provides power-control function that
monitors the
data can be written and read when
However, when
registers are blocked from any access. If V
V
V
power is switched from
V
until
returns above V
t
Power-up/down Timing
Table 2. Power-up/down Characteristics
IDT® REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 5
REC
CC
BAT
BAT
IDT1338
REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM
drops below V
, the device power is switched from
. The registers are maintained from the V
V
(see the “Power-Up/Down Timing” diagram).
CC
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.
is returned to nominal levels (Table 1). After
Recovery at Power-up
V
V
CC
CC
V
Fall Time; V
Rise Time; V
CC
V
PF
CC
level. The device is fully accessible and
, read and write access is allowed after
PF
falls below V
. If V
Parameter
V
PF
CC
PF(MAX)
PF(MIN)
is greater than V
to V
BAT
PF
to V
to V
, the internal clock
V
when
CC
PF(MIN)
PF(MAX)
is greater than V
V
CC
V
PF
CC
BAT
to V
is less than
BAT
drops below
, the device
BAT
source
Symbol
t
t
t
VCCF
VCCR
when
REC
V
CC
PF
.
(see note below)
IDT1338-18
IDT1338-31
Table 1. Power Control
Conditions
V
V
V
V
Supply Condition
CC
CC
CC
CC
< V
< V
> V
> V
PF
PF
PF
PF
, V
, V
, V
, V
CC
CC
CC
CC
<
>
<
>
V
V
V
V
BAT
BAT
BAT
BAT
Min.
300
1
0
Read/Write
Access
Typ.
Yes
Yes
No
No
IDT1338
Max.
Powered
2
V
REV R 020713
V
V
V
By
BAT
CC
CC
CC
Units
RTC
ms
ms
µs
µs