ISL12027IB27AZ Intersil, ISL12027IB27AZ Datasheet - Page 3

• Manufacturer Part Number: ISL12027IB27AZ
• Description: IC RTC/CALENDAR EEPROM 8-SOIC
• Manufacturer: Intersil
• Type: Clock/Calendar/Supervisor/EEPROMr

Specifications of ISL12027IB27AZ

• 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)
• Clock Format: HH
• Clock Ic Type: RTC
• Interface Type: I2C, Serial
• Memory Configuration: 512 X 8
• Supply Voltage Range: 2.7V To 5.5V
• Digital Ic Case Style: SOIC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Descriptions
SOIC
1
2
3
4
5
6
7
8
PIN NUMBER
TSSOP
3
4
5
6
7
8
1
2
SYMBOL
RESET
V
GND
SDA
SCL
V
X1
X2
BAT
DD
3
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.
DD
supply fails. This pin should be tied to ground if not used.
ISL12027
BRIEF DESCRIPTION
TRIP
BAT
threshold. It is an open drain active LOW
supplies power to the device in the event
October 18, 2006
FN8232.4