PCA8575

General description

The PCA8575 provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional I²C-bus (serial clock (SCL), serial data (SDA)).

The device consists of a 16-bit quasi-bidirectional port and an I²C-bus interface. The PCA8575 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs.

The PCA8575 also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I²C-bus. The internal Power-On Reset (POR) initializes the I/Os as inputs.

Features

• 400 kHz I²C-bus interface
• 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
• 16-bit remote I/O pins that default to inputs at power-up
• Latched outputs with 25 mA sink capability for directly driving LEDs
• Total package sink capability of 400 mA
• Active LOW open-drain interrupt output
• 8 programmable slave addresses using 3 address pins
• Readable device ID (manufacturer, device type, and revision)
• Low standby current (10 uA max.)
• -40 Cel to +85 Cel operation
• 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
• Packages offered: SO24, SSOP24 (QSOP24), TSSOP24, HVQFN24, DHVQFN24

Products/packages

Quality/reliability/chemical content

Quality and reliability disclaimer

Pricing/ordering/availability

Applications

• LED signs and displays
• Servers
• Industrial control
• Medical equipment
• PLCs
• Cellular telephones
• Gaming machines
• Instrumentation and test measurement

Related applications
Intelligent washing machine
PCI analog/DVB-T stereo TV receiver
LCD TV - MMS functionality
Set-top box - MMS functionality

Block diagrams/pinning

Design support

Application Notes

AN10441; Level shifting techniques in I2C-bus design (2007-06-20)

AN256; PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus (2009-03-23)

Support Documents

75016543; An industry-leading portfolio of cost-effective, power-saving solutions for major home appliances (2008-06-01)

UM10206; I2C Demonstration Board 2005-1 Quick Start Guide (2006-06-13)

UM10204; I2C-bus specification and user manual (2007-06-26)

web; IBIS and HSPICE Model ()

75016535; NXP 4/8/16-bit I²C/SMBus GPIO expanders PCA9536/54/54A/55 (2008-08-01)

UM10267; PCA9698 demonstration board OM6281 (2008-09-26)

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer