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PCA9538 Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. PCA9538
Description  8-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

PCA9538 Datasheet(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product data sheet
PCA9538
8-bit I2C and SMBus low power I/O port
with interrupt and reset
2
2004 Oct 05
FEATURES
8-bit I2C GPIO with interrupt and reset
Operating power supply voltage range of 2.3 V to 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
8 I/O pins which default to 8 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: SO16, TSSOP16, and
HVQFN16
DESCRIPTION
The PCA9538 is a 16-pin CMOS device that provide 8 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 PCA9538 consists of an 8-bit Configuration register (Input or
Output selection); 8-bit Input register, 8-bit Output register and an
8-bit Polarity inversion register (Active HIGH or Active LOW
operation). 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 input port register can be inverted with the
Polarity Inversion Register. All registers can be read by the system
master.
The PCA9538 is identical to the PCA9554 except for the removal of
the internal I/O pull-up resistor which greatly reduces power
consumption when the I/Os are held LOW, replacement of A2 with
RESET and different address range.
The PCA9538 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/initialization to occur without depowering the
device.
Two hardware pins (A0 and A1) vary the fixed I2C address and allow
up to four devices to share the same I2C/SMBus.
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
TOPSIDE MARK
DRAWING NUMBER
16-Pin Plastic SO (wide)
–40
°C to +85 °C
PCA9538D
PCA9538D
SOT162-1
16-Pin Plastic TSSOP
–40
°C to +85 °C
PCA9538PW
PCA9538
SOT403-1
16-Pin Plastic HVQFN
–40
°C to +85 °C
PCA9538BS
9538
SOT629-1
Standard packing quantities and other packing data are available at www.standardproducts.philips.com/packaging.
I2C-bus 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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