Documentation
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Application Note
Level shifting techniques in I2C-bus design
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User Guide
I2C-bus specification and user manual
Remote 16-Bit I/O Expander for I²C-Bus with Interrupt
PCA8575 Receive alerts
The PCA8575 provides general purpose remote I/O expansion for many 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.
Product Details
Block Diagram
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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 target 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
Target Applications
- LED signs and displays
- Servers
- Industrial control
- Medical equipment
- PLCs
- Cellular telephones
- Gaming machines
- Instrumentation and test measurement
Design Resources
Design Files
1 design file
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Models
PCA8575 IBIS model
Hardware
1 hardware offering
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Evaluation and Development BoardsSurface Mount to DIP Evaluation Board
Engineering Services
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1 engineering service
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Independent Design House (IDH)
Embedded Software Design
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