ISL12028IB27Z Intersil, ISL12028IB27Z Datasheet - Page 3

• Manufacturer Part Number: ISL12028IB27Z
• Description: IC RTC W/EEPROM 2.7V 14SOIC
• Manufacturer: Intersil
• Type: Clock/Calendar/Supervisor/EEPROMr

Specifications of ISL12028IB27Z

• 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: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Descriptions
3, 4, 5, 10,
NUMBER
PIN
12
13
14
11
1
2
6
7
8
9
IRQ/F
SYMBOL
RESET
GND
V
SDA
SCL
V
NC
X1
X2
BAT
DD
OUT
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.
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 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
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).
Interrupt Output/Frequency Output is a multi-functional pin that can be used as interrupt or frequency output pin. The
function is set via the configuration register. It is a CMOS push-pull output and does not require a pull-up resistor.
This input provides a backup supply voltage to the device. V
V
Power Supply.
No Internal Connection.
DD
3
supply fails. This pin should be tied to ground if not used.
ISL12028, ISL12028A
TRIP
DESCRIPTION
threshold. It is an open drain active LOW output. Recommended
BAT
supplies power to the device in the event that the
November 30, 2010
FN8233.9