Datasheet

PCA6408A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 27 September 2012 2 of 40
NXP Semiconductors
PCA6408A
Low-voltage, 8-bit I
2
C-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 I
2
C-bus address
and allow up to two devices to share the same I
2
C-bus or SMBus.
2. Features and benefits
 I
2
C-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 PortP
 2.5V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V PortP
 3.3V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V PortP
 5V SCL/SDA and 1.8V, 2.5V, 3.3V or 5V PortP
 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
 V
hys
= 0.18 V (typical) at 1.8 V
 V
hys
= 0.25 V (typical) at 2.5 V
 V
hys
= 0.33 V (typical) at 3.3 V
 V
hys
= 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 I
2
C-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