ISL12027IB27Z-T Intersil, ISL12027IB27Z-T Datasheet - Page 25

• Manufacturer Part Number: ISL12027IB27Z-T
• Description: IC RTC/CALENDAR EEPROM 8-SOIC
• Manufacturer: Intersil
• Type: Clock/Calendar/Supervisor/EEPROMr

Specifications of ISL12027IB27Z-T

• Memory Size: 4K (512 x 8)
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Bus Type: Serial (I2C)
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 8
• Mounting: Surface Mount
• Rohs Compliant: YES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ISL12027IB27Z-TTR

.
.
(X12028
MODE
mode)
C
D
A
B
TABLE 10. I
SBIB
BIT
V
V
0
0
1
1
I
DD
I
BAT
DD
BAT
RESET
RESET
BSW
BIT
2
0
1
0
1
V
(2.2V)
C, LV RESET, AND BATTERY BACKUP OPERATION SUMMARY (Shaded Row is same as X12028 operation)
V
(2.2V)
TRIP
TRIP
V
RESET
V
Standard Mode,
Standard Mode,
SWITCHOVER
Legacy Mode,
Legacy Mode,
RESET
V
V
V
V
ISL12027A
VOLTAGE
Default for
Default for
25
TRIP
TRIP
ISL12027
DD
DD
V
BAT
V
(2.63V)
V
typ
typ
BAT
< V
< V
(2.63V)
BAT
= 2.2V
= 2.2V
(3.0V)
BAT
BAT
FIGURE 29. EXAMPLE RESET OPERATION IN MODE A OR C
(3.0V)
(VDD POWER, V
V
I
2
BAT
C ACTIVE IN
YES, only if
FIGURE 30. RESET OPERATION IN MODE D
BACKUP?
BATTERY
> V
NO
NO
NO
tPURST
tPURST
ISL12027, ISL12027A
RESET
BAT
NOT CONNECTED)
READ IN BATTERY
EE PROM WRITE/
BACKUP?
I
2
C BUS ACTIVE
YES
NO
NO
NO
I
2
C Bus Active
FREQ/IRQ
ACTIVE?
YES
YES
N/A
Yes
Operation of I
then below that no communications. Battery
switchover at V
Operation of I
mode, but only for
V
Bus must have pull-ups to V
non-volatile writes with V
Operation of I
then below that no communications. Battery
switchover at V
Operation of I
V
BAT
BAT
, whichever is higher.
> V
DD
(BATTERY BACKUP MODE)
(BATTERY BACKUP MODE)
> V
2
2
2
2
C bus down to V
C bus down to V
C bus into battery backup
C busdown to V
TRIP
TRIP
RESET
NOTES
.
.
.
BAT
BAT
> V
DD
RESET
DD
. No
August 12, 2010
DD
= V
=V
RESET
RESET
FN8232.8
or
,
,