PCA9670D,512

I/o Expanders Overview

The PCA9670D,512 is an 8-bit remote I/O expander for the Fast-mode Plus (Fm+) I2C-bus with a reset function. It operates within a supply voltage range of 2.3 V to 5.5 V and supports a maximum clock frequency of 1 MHz. The device features eight quasi-bidirectional ports that default to inputs at power-up, providing latched outputs with a 25 mA sink capability per pin and a total package sink capability of 200 mA. It includes three hardware address inputs allowing up to 64 programmable slave addresses on a single bus. The component operates between -40 °C and +85 °C, consumes 2.5 µA typical standby current, and offers ESD protection exceeding 2000 V HBM.

I/o Expanders Feature Summary

• Supports 1 MHz I2C-bus interface with 30 mA SDA sink capability
• Features active LOW hardware reset input and software reset sequence
• Provides readable device ID containing manufacturer, part identification, and revision data
• Includes latch-up testing compliant with JEDEC standard JESD78

I/o Expanders Applications

• LED signs and displays
• Servers
• Industrial control systems
• Medical equipment
• PLCs

I/o Expanders Procurement Notes

Verify the specific ordering suffix ',512' against official NXP documentation to confirm tube packaging specifications. Confirm the SO16 package designation matches the required board layout. Ensure compatibility with the specified operating temperature range and voltage requirements before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when expanding I/O capacity via Fm+ I2C-bus is required. It serves as a direct upgrade to PCF8574 devices, offering higher speed and drive capabilities. Consider the 64-addressable limit and 25 mA output drive when designing systems requiring multiple expanders or high-current LED loads without external buffers.

I/o Expanders Part Context

The PCA9670 belongs to NXP's family of remote I/O expanders designed for Fm+ I2C-bus applications. It replaces legacy parallel I/O port controllers by providing enhanced bus speeds and drive currents. The device integrates general-purpose I/O expansion with robust reset and identification features suitable for complex embedded systems.

I/o Expanders Replacement Considerations

PCA9670BS, PCA9670PW are alternative packages within the same functional family. Verify pinout compatibility and thermal performance differences when substituting SO16 variants.