PCA9501D,118

I/o Expanders Overview

The PCA9501D,118 is an 8-bit I/O expander with integrated 2-kbit EEPROM. It features quasi-bidirectional data pins independently assignable as inputs or outputs. The device supports I2C-bus and SMBus interfaces with a clock frequency up to 400 kHz. Operating voltage ranges from 2.5 V to 3.6 V. It includes six hardware address pins allowing up to 64 devices on the bus. An active LOW open-drain interrupt output signals input state changes. The package is SO20 (SOT163-1) with a body width of 7.5 mm.

I/o Expanders Feature Summary

• Integrated 2-kbit EEPROM for storing board manufacturing data or error codes
• Active LOW open-drain interrupt output indicating input state changes
• Six hardware address pins enabling up to 64 devices on a single I2C-bus/SMBus
• Supports hot insertion for removable cards in backplane systems

I/o Expanders Applications

• Board version tracking and configuration
• Board health monitoring and status reporting
• Multi-card systems in telecom, networking, and base station infrastructure equipment
• Field recall and troubleshooting functions for installed boards

I/o Expanders Procurement Notes

Verify the specific ordering suffix '118' against the manufacturer's current documentation to confirm packaging details and compliance status. Ensure the SO20 package variant matches the required footprint dimensions. Confirm that the operating voltage range of 2.5 V to 3.6 V aligns with the system power supply specifications before finalizing procurement.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with non-volatile memory storage is required. It serves as a replacement for the PCF8574 while adding EEPROM capabilities. Ensure the system utilizes an I2C-bus or SMBus interface compatible with 400 kHz clock speeds. Verify that the 2.5 V to 3.6 V supply voltage range fits the design constraints.

I/o Expanders Part Context

The PCA9501D,118 belongs to the PCA9501 family of 8-bit I/O expanders with EEPROM. It is manufactured by NXP Semiconductors. The 'D' suffix indicates the SO20 plastic small outline package. This part provides both GPIO expansion and data storage in a single device, simplifying board design for applications requiring status monitoring and configuration data retention.

I/o Expanders Replacement Considerations

Direct replacements include other variants within the PCA9501 family such as PCA9501PW or PCA9501BS, depending on the required package type.