isl12057 Intersil Corporation, isl12057 Datasheet - Page 3

• Manufacturer Part Number: isl12057
• Description: Low Cost And Low Power I 2c Rtc Real Time Clock/calendar
• Manufacturer: Intersil Corporation

Pin Descriptions
NUMBER
PIN
1
2
3
4
5
6
7
8
IRQ1/F
SYMBOL
IRQ2
GND
SDA
SCL
V
X1
X2
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
The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz
Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an open drain output
quartz crystal. This pin can also be driven by an external 32.768kHz oscillator with X2 pin floating.
quartz crystal.
Interrupt Output 2 is a multi-functional pin that can be used as alarm interrupt. This pin is open drain and requires an
external pull-up resistor. This pin is at high impedance at power up.
Ground
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.
Interrupt Output 1/Frequency Output is a multi-functional pin that can be used as alarm interrupt or frequency output
pin. The function is set via the configuration register. This pin is open drain and requires an external pull-up resistor. It
has a default output of 32.768kHz at power up.
Power supply
3
ISL12057
DESCRIPTION
June 15, 2009
FN6755.0