Philips Semiconductors Product data sheet
PCA9539
16-bit I
2
C and SMBus, low power I/O port
with interrupt and reset
2
2004 Sep 30
FEATURES
• 16-bit I
2
C 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
JESD22-C101
• Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
• Offered in three different packages: SO24, TSSOP24, and
HVQFN24
DESCRIPTION
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 I
2
C/SMBus applications and was developed
to enhance the Philips family of I
2
C 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 I
2
C address and allow up
to four devices to share the same I
2
C/SMBus.
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE TOPSIDE MARK DRAWING NUMBER
24-Pin Plastic SO –40 °C to +85 °C PCA9539D PCA9539D SOT137-1
24-Pin Plastic TSSOP –40 °C to +85 °C PCA9539PW PCA9539PW SOT355-1
24-Pin Plastic HVQFN –40 °C to +85 °C PCA9539BS 9539 SOT616-1
Standard packing quantities and other packing data are available at www.standardproducts.philips.com/packaging.
I
2
C is a trademark of Philips Semiconductors Corporation.
SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I
2
C patent.
