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PCA9535HF +BOM

16-bit I2C-bus and SMBus, low power I/O port with interrupt

Manufacturer:

NXP Semiconductor
Mfr.Part #:

PCA9535HF
Datasheet:

PCA9535HF Datasheet (PDF)
No Of Bits:

16
V<sub>DD</sub> [min]:

2.3
V<sub>DD</sub> [max]:

5.5
Over Volt Tolerant:

Y
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PCA9535HF General Description

The PCA9535 and PCA9535C are 24-pin CMOS devices that provide 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.The PCA9535 and PCA9535C consist of two 8-bit Configuration (Input or Output selection), Input, Output and Polarity Inversion (active HIGH or active LOW operation) registers. The system controller 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 controller. Although pin-to-pin and I2C-bus address compatible with the PCF8575, software changes are required due to the enhancements and are discussed in Application Note AN469.The PCA9535 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.The PCA9535C is identical to the PCA9535 except that all the I/O pins are high-impedance open-drain outputs.The PCA9535 and PCA9535C 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 controller that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine.Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight devices to share the same I2C-bus/SMBus. The fixed I2C-bus address of the PCA9535 and PCA9535C are the same as the PCA9555 allowing up to eight of these devices in any combination to share the same I2C-bus/SMBus.

Key Features

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
Low standby 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 Hz 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 JEDEC Standard JESD78 which exceeds 100 mA
Offered in four different packages: SO24, TSSOP24, HVQFN24 and HWQFN24

Specifications

No of bits	16	V<sub>DD</sub> [min]	2.3
V<sub>DD</sub> [max]	5.5	Over volt tolerant	Y
No of supplies	1	Standby current [typ] (µA)	0.25
Max Sink Current per bit (mA)	25	Source Current per bit (mA)	10
Interrupt output pin	Y	Output mode	Totem pole
Input mode: invert option	Y	I2C-bus (kHz)	400
Footprint body and leads	16.81	Operating Temperature (°C)	-40~85
No of Addresses	8