PCA9535EMTTXG

I/o Expanders Overview

The PCA9535EMTTXG is a 16-bit I/O expander manufactured by onsemi, designed for I2C and SMBus communication. It operates within a supply voltage range of 1.65V to 5.5V and supports clock frequencies up to 100 kHz. The device features open-drain outputs capable of sourcing or sinking 25mA per pin. It includes an interrupt output and power-on reset (POR) functionality. The component is housed in a 24-WFQFN package with exposed pad, measuring 4x4 mm, and is rated for operation between -55°C and 125°C.

I/o Expanders Feature Summary

• Provides 16 general-purpose digital input/output ports expandable via I2C interface
• Includes dedicated interrupt output pin for efficient event-driven monitoring
• Features internal configuration registers allowing individual pin direction control
• Supports low-voltage operation with integrated power-on reset circuitry

I/o Expanders Applications

• Portable consumer electronics requiring extended GPIO capabilities
• Industrial control systems utilizing I2C bus architectures
• Embedded devices needing remote I/O expansion in compact form factors

I/o Expanders Procurement Notes

Verify the specific suffix 'EMTTXG' against official onsemi documentation to confirm exact packaging and tape/reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors as availability may vary. Ensure the procurement channel provides valid traceability for this discontinued or limited-stock component type.

I/o Expanders Selection Notes

Select this component when a 16-bit I/O expander with I2C interface is required in a small QFN footprint. Verify that the system voltage falls within the 1.65V to 5.5V range. Consider the 100 kHz speed limit if higher bus speeds are needed, in which case alternative models like the PCA9535E with 400 kHz support might be more suitable.

I/o Expanders Part Context

This part belongs to the PCA9535 family of low-power I/O expanders. It shares functional similarities with other 16-bit I2C expanders but is distinguished by its specific onsemi manufacturing process and 24-QFN packaging. It serves as a bridge between microcontrollers and external peripherals in space-constrained designs.

I/o Expanders Replacement Considerations

Publicly confirmed substitutes include the NLA9535 from onsemi, which offers similar 16-bit I2C functionality. Other potential replacements from different manufacturers should be verified for pin compatibility and electrical parameter alignment before integration.