1338-31DCGI8 IDT, Integrated Device Technology Inc, 1338-31DCGI8 Datasheet - Page 5

• Manufacturer Part Number: 1338-31DCGI8
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 1338-31DCGI8

• Bus Type: Serial (I2C)
• User Ram: 56Byte
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 8
• Mounting: Surface Mount
• Date Format: DW:DM:M:Y
• Time Format: HH:MM:SS
• Lead Free Status / RoHS Status: Compliant

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)
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
0
Read/Write
Access
Typ.
Yes
Yes
No
No
IDT1338
Max.
Powered
2
V
V
V
V
REV K 032910
By
BAT
CC
CC
CC
Units
RTC
ms
µs
µs