PCA6408ABS datasheet(2/40 Pages) NXP

Part #	PCA6408ABS

Description	Low-voltage, 8-bit I2C-bus and SMBus I/O expander with interrupt output, reset, and configuration registers

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Manufacturer	NXP [NXP Semiconductors]

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PCA6408A

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Product data sheet

Rev. 1 — 27 September 2012

2 of 40

NXP Semiconductors

PCA6408A

Low-voltage, 8-bit I2C-bus and SMBus I/O expander

The device Port P outputs have 25 mA sink capabilities for directly driving LEDs while

consuming low device current.

One hardware pin (ADDR) can be used to program and vary the fixed I2C-bus address

and allow up to two devices to share the same I2C-bus or SMBus.

2.

Features and benefits

 I2C-bus to parallel port expander

 Operating power supply voltage range of 1.65 V to 5.5 V

 Allows bidirectional voltage-level translation and GPIO expansion between:

 1.8V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V Port P

 2.5V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V Port P

 3.3V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V Port P

 5V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V Port P

 Low standby current consumption of 1

A

 Schmitt-trigger action allows slow input transition and better switching noise immunity

at the SCL and SDA inputs

 Vhys = 0.18 V (typical) at 1.8 V

 Vhys = 0.25 V (typical) at 2.5 V

 Vhys = 0.33 V (typical) at 3.3 V

 Vhys = 0.5 V (typical) at 5 V

 5 V tolerant I/O ports

 Active LOW reset input (RESET)

 Open-drain active LOW interrupt output (INT)

 400 kHz Fast-mode I2C-bus

 Input/Output Configuration register

 Polarity Inversion register

 Internal power-on reset

 Power-up with all channels configured as inputs

 No glitch on power-up

 Noise filter on SCL/SDA inputs

 Latched outputs with 25 mA drive maximum capability for directly driving LEDs

 Latch-up performance exceeds 100 mA per JESD 78, Class II

 ESD protection exceeds JESD 22

 2000 V Human-Body Model (A114-A)

 1000 V Charged-Device Model (C101)

 Packages offered: HVQFN16, TSSOP16, XQFN16

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