PCA9536DR

I/o Expanders Overview

The PCA9536DR is a remote 4-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features four configurable I/O pins, each with internal pull-up resistors, and includes configuration, input, output, and polarity inversion registers. It provides ESD protection exceeding 2 kV HBM and functions reliably across an operating temperature range of -40°C to +85°C. Packaged in an SOIC-8 surface-mount format, it integrates an internal power-on reset mechanism.

I/o Expanders Feature Summary

• Configurable I/O direction via dedicated configuration registers
• Polarity inversion capability for flexible logic level handling
• Internal noise filters on SCL and SDA inputs
• Automatic initialization through internal power-on reset

I/o Expanders Applications

• Portable systems requiring additional GPIOs
• Industrial control panels
• Consumer electronics with limited microcontroller pins

I/o Expanders Procurement Notes

Verify the specific package variant and tape/reel specifications against the official datasheet before procurement. Confirm RoHS compliance status and ensure the supplier provides valid traceability documentation. Check for any obsolescence notices or lifecycle changes from Texas Instruments to avoid supply chain disruptions during production.

I/o Expanders Selection Notes

Select this component when a fixed I2C address is acceptable, as the address cannot be configured externally. Ensure the system voltage aligns with the 2.3 V to 5.5 V operating range. Consider the lack of interrupt output if real-time event detection is required, as this model does not support interrupt signaling.

I/o Expanders Part Context

The PCA9536 belongs to the PCA9536 series of 4-bit I/O expanders. It serves as a bridge between I2C/SMBus masters and peripheral devices. The 'DR' suffix denotes the SOIC-8 package type. This component is part of Texas Instruments' interface IC portfolio designed for simple GPIO expansion in embedded applications.

I/o Expanders Replacement Considerations

PCA9536D,118 (NXP USA Inc.) is listed as a direct substitute.