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PCA9539 Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. PCA9539
Description  16-bit I2C and SMBus, low power I/O port with interrupt and reset
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9539 Datasheet(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product data sheet
16-bit I2C and SMBus, low power I/O port
with interrupt and reset
2004 Sep 30
16-bit I2C GPIO with interrupt and reset
Operating power supply voltage range of 2.3 V–5.5 V
5 V tolerant I/Os
Polarity inversion register
Active LOW interrupt output
Active LOW reset input
Low stand-by current
Noise filter on SCL/SDA inputs
No glitch on power-up
Internal power-on reset
16 I/O pins which default to 16 inputs
0 kHz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115, and 1000 V CDM per
Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
Offered in three different packages: SO24, TSSOP24, and
The PCA9539 is a 24-pin CMOS device that provide 16 bits of
General Purpose parallel Input/Output (GPIO) expansion with
interrupt and reset for I2C/SMBus applications and was developed
to enhance the Philips family of I2C I/O expanders. I/O expanders
provides a simple solution when additional I/O is needed for ACPI
power switches, sensors, pushbuttons, LEDs, fans, etc.
The PCA9539 consists of two 8-bit Configuration (Input or Output
selection); Input, Output and Polarity inversion (Active HIGH or
Active LOW operation) registers. The system master can enable the
I/Os as either inputs or outputs by writing to the I/O configuration
bits. The data for each Input or Output is kept in the corresponding
Input or Output register. The polarity of the read register can be
inverted with the Polarity Inversion Register. All registers can be
read by the system master.
The PCA9539 is identical to the PCA9555 except for the removal of
the internal I/O pull-up resistor which greatly reduces power
consumption when the I/Os are held LOW, repleacement of A2 with
RESET and different address range.
The PCA9539 open-drain interrupt output is activated when any
input state differs from its corresponding input port register state and
is used to indicate to the system master that an input state has
changed. The power-on reset sets the registers to their default
values and initializes the device state machine. The RESET pin
causes the same reset/sonfiguration to occur without depowering
the device.
Two hardware pins (A0, A1) vary the fixed I2C address and allow up
to four devices to share the same I2C/SMBus.
24-Pin Plastic SO
°C to +85 °C
24-Pin Plastic TSSOP
°C to +85 °C
24-Pin Plastic HVQFN
°C to +85 °C
Standard packing quantities and other packing data are available at www.standardproducts.philips.com/packaging.
I2C is a trademark of Philips Semiconductors Corporation.
SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I2C patent.

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