PCA9500BSHP

I/o Expanders Overview

The PCA9500BSHP is an 8-bit I/O expander with integrated 2-kbit EEPROM, operating at 2.5 V to 3.6 V in a TSSOP16 package. It features I²C-bus and SMBus interfaces with noise filters on SCL/SDA inputs. The device includes three hardware address pins allowing up to eight devices on the bus. It supports hot insertion, internal power-on reset, and low standby current. The I/O pins are quasi-bidirectional, configurable as inputs or outputs, and tolerate 5 V levels.

I/o Expanders Feature Summary

• Integrates 2-kbit EEPROM for board configuration and diagnostic data storage
• Supports hot insertion for removable card applications
• Provides internal noise filtering on serial data inputs
• Offers drop-in replacement compatibility with PCF8574

I/o Expanders Applications

• Board version tracking and configuration
• Telecom and network base station multi-card systems
• Field recovery and troubleshooting of installed boards

I/o Expanders Procurement Notes

Verify the complete ordering code matches the specific suffix requirements for tape and reel packaging. Confirm the voltage range and interface logic align with system specifications before integration. Ensure ESD handling procedures are followed during assembly due to CMOS construction standards.

I/o Expanders Selection Notes

Select this component when 8-bit expansion combined with non-volatile memory is required. It is suitable for systems needing hot-swap capabilities and SMBus compatibility. Consider alternative models if higher pin counts or interrupt outputs are necessary for the design.

I/o Expanders Part Context

This part belongs to the PCA9500 series of I/O expanders developed by NXP Semiconductors. It enhances standard GPIO functionality by embedding EEPROM within the same package. The series targets industrial and commercial environments requiring reliable board-level status monitoring.

I/o Expanders Replacement Considerations

The PCA9500 serves as a direct drop-in replacement for the PCF8574 while adding EEPROM functionality. For systems requiring more than eight devices on the bus or interrupt outputs, the PCA9501 is the functional alternative.