ISL12025IVZ Intersil, ISL12025IVZ Datasheet - Page 2

• Manufacturer Part Number: ISL12025IVZ
• Description: IC RTC/CALENDAR EEPROM 8-TSSOP
• Manufacturer: Intersil
• Type: Clock/Calendar/Supervisor/EEPROMr

Specifications of ISL12025IVZ

• 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-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Block Diagram
Pin Descriptions
SOIC
1
2
3
4
5
6
7
8
PIN NUMBER
SCL
SDA
32.768KHZ
TSSOP
RESET
INTERFACE
DECODER
3
4
5
6
7
8
1
2
SERIAL
X1
X2
SYMBOL
RESET
V
CONTROL
GND
SDA
SCL
V
DECODE
X1
X2
BAT
LOGIC
DD
8
2
The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external
32.768kHz quartz crystal. X1 can also be driven directly from a 32.768kHz source.
The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external
32.768kHz quartz crystal.
RESET. This is a reset signal output. This signal notifies a host processor that the “watchdog” time period
has expired or that the voltage has dropped below a fixed V
output. Recommended value for the pull-up resistor is 5kΩ. If unused, connect to ground.
Ground.
Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an
open drain output and may be wire OR’ed with other open drain or open collector outputs.
The Serial Clock (SCL) input is used to clock all serial data into and out of the device. The input buffer on
this pin is always active (not gated).
This input provides a backup supply voltage to the device. V
that the V
Power Supply.
REGISTERS
CONTROL/
(EEPROM)
OSCILLATOR
OSC COMPENSATION
DD
supply fails. This pin should be tied to ground if not used.
WATCHDOG
TIMER
FREQUENCY
REGISTERS
STATUS
DIVIDER
(SRAM)
ISL12025
LOW VOLTAGE
RESET
1Hz
CALENDAR
ALARM
BRIEF DESCRIPTION
TIMER
LOGIC
COMPARE
ALARM REGS
EEPROM
REGISTERS
ARRAY
(EEPROM)
KEEPING
(SRAM)
4k
TIME
TRIP
BAT
supplies power to the device in the event
threshold. It is an open drain active LOW
CIRCUITRY
BATTERY
SWITCH
V
V
DD
BAT
August 13, 2008
FN6371.3