ISL12022MR5421 Datasheet, PDF (3/29 Pages) Intersil Corporation – Low Power RTC with Battery Backed SRAM, Integrated 5ppm

ISL12022MR5421
Pin Descriptions (Continued)
PIN
NUMBER
13
14
1, 2, 3, 6, 8,
15, 18, 19,
20
SYMBOL
DESCRIPTION
IRQ/F_OUT
Interrupt Output/Frequency Output (Default 32.768kHz frequency output). This dual function pin
can be used as an interrupt or frequency output pin. The IRQ/F_OUT mode is selected via the frequency
out control bits of the control/status register. Interrupt Mode. The pin provides an interrupt signal
output. This signal notifies a host processor that an alarm has occurred and requests action. It is an
open drain active low output. Frequency Output Mode. The pin outputs a clock signal, which is
related to the crystal frequency. The frequency output is user selectable and enabled via the I²C bus.
It is an open drain output. The output is open drain and requires a pull-up resistor.
V_DD
GND
Power Supply. Chip power supply and ground pins. The device will operate with a power supply from
V_DD = 2.7V to 5.5VDC. A 0.1µF capacitor is recommended on the V_DD pin to ground.
Ground Pin.
Ordering Information
PART NUMBER
PART
MARKING
V_DD RANGE
(V)
TEMP RANGE
(°C)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
ISL12022MIBZR5421 ISL12022MIBZ R5421
(Note 2)
2.7 to 5.5
-40 to +85 20 Ld SOIC
M20.3
ISL12022MIBZ-TR5421 ISL12022MIBZ R5421
(Notes 1, 2)
2.7 to 5.5
-40 to +85 20 Ld SOIC (Tape and Reel) M20.3
1. Please refer to TB347 for details on reel specifications.
2. These Intersil plastic packaged products employ special material sets, molding compounds and 100% matte tin plate plus
anneal (e3) termination finish. These products do contain Pb but they are RoHS compliant by exemption 7 (lead in high melt
temp solder for internal connections) and exemption 5 (lead in piezoelectric elements). These Intersil RoHS compliant
products are compatible with both SnPb and Pb free soldering operations. These Intersil RoHS compliant products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3
FN7576.1
June 4, 2010