PCA9654EDR2G

I/o Expanders Overview

The PCA9654EDR2G is an 8-bit I/O expander for I2C-bus and SMBus applications, manufactured by onsemi. It provides general-purpose parallel input/output expansion with a supply voltage range of 1.65 V to 5.5 V. The device features 30 mA SDA sink capability and 5.5 V tolerant I/Os. It supports Standard Mode (100 kHz), Fast Mode (400 kHz), and Fast Mode+ (1 MHz) clock frequencies. An active LOW interrupt output signals input state changes. The component includes polarity inversion registers and internal power-on reset logic. It operates within a temperature range of -55°C to +125°C and is housed in a SOIC-16 package.

I/o Expanders Feature Summary

• Configurable 8-bit I/O ports with individual direction selection via configuration registers
• Active LOW open-drain interrupt output triggered by input state changes
• Polarity inversion register allowing flexible active HIGH or LOW operation
• Hardware address pins enabling up to 64 unique slave addresses on the bus

I/o Expanders Applications

• I2C/SMBus system master interface expansion
• General purpose digital input monitoring
• Digital output control in embedded systems

I/o Expanders Procurement Notes

Verify the specific suffix 'DR2G' corresponds to the SOIC-16 package and tape & reel shipping format as documented in the official ordering information. Confirm that the device code matches the required revision level for your design. Ensure compatibility with the intended I2C bus voltage levels and check for any recent product change notices affecting manufacturing sites.

I/o Expanders Selection Notes

Select this component when 8 bits of GPIO expansion are required over an I2C interface. Consider the PCA9654EA variant if a different hardware address map is needed compared to the PCA9654E. Verify that the operating voltage range of 1.65 V to 5.5 V aligns with the system power rails. Check if the 30 mA SDA sink capability meets the bus load requirements without external buffering.

I/o Expanders Part Context

This part belongs to the PCA9654E/PCA9654EA family of 8-bit I/O expanders. The 'D' suffix indicates the SOIC-16 package, while 'R2G' denotes the tape and reel packaging and lead-free status. Other variants include TSSOP-16 (DT suffix) and QFN packages. The device is designed for low standby current and noise immunity in industrial and consumer applications.

I/o Expanders Replacement Considerations

Public confirmed substitutes include PCA9654EDTR2G (TSSOP-16 package). Verify pinout and register compatibility before substitution. No other direct cross-manufacturer replacements are verified in the provided documentation.