PCA9535PWG4

I/o Expanders Overview

The PCA9535PWG4 is a 16-bit I/O expander designed for I2C and SMBus communication. It operates within a supply voltage range of 2.3 V to 5.5 V, supporting clock frequencies up to 400 kHz. The device features an interrupt output capability and configuration registers for flexible input/output management. It is housed in a 24-pin TSSOP package suitable for surface mount applications. The component provides low-power operation with a typical operating current of 100 µA and includes ESD protection rated at 2 kV. It functions reliably across a temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Supports bidirectional data transfer via standard I2C and SMBus protocols
• Includes dedicated interrupt output pin for efficient event-driven monitoring
• Features individual configuration registers to set each pin as input or output

I/o Expanders Applications

• Portable systems requiring extended I/O capabilities
• Industrial control panels with limited microcontroller pins
• Consumer electronics utilizing I2C/SMBus interfaces

I/o Expanders Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to ensure correct packaging and environmental compliance. Confirm that the G4 suffix aligns with current RoHS standards and lead-free requirements. Cross-reference the part number with official distributor catalogs to validate availability status and ensure compatibility with existing supply chain channels before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when a system requires sixteen additional general-purpose digital I/O lines accessible through a two-wire serial interface. Ensure the host controller supports the required I2C/SMBus speeds and voltage levels compatible with the 2.3 V to 5.5 V operating range. Consider the TSSOP-24 package dimensions for PCB layout constraints and verify thermal performance within the specified industrial temperature limits.

I/o Expanders Part Context

This part belongs to the PCA9535 family of low-voltage I/O expanders manufactured by Texas Instruments. It serves as a bridge between microcontrollers and peripheral devices, effectively increasing system connectivity without consuming additional processor resources. The device is widely used in embedded designs where space efficiency and low power consumption are critical design parameters.

I/o Expanders Replacement Considerations

Direct substitutes include PCA9535PWR and PCA9535PW. Verify pinout compatibility and electrical specifications before substitution.