ISL12029 Intersil Corporation, ISL12029 Datasheet - Page 3

• Manufacturer Part Number: ISL12029
• Description: Real Time Clock/Calendar
• Manufacturer: Intersil Corporation

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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
N.C.
V
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. 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
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).
Interrupt Output/Frequency Output is a multi-functional pin that can be used as interrupt or frequency output pin. It
is an open drain output. The function is set via the configuration register.
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.
ISL12029
DESCRIPTION
TRIP
BAT
threshold. It is an open drain active LOW output.
supplies power to the device in the event that the
April 17, 2006
FN6206.4