PCA9536DGKRG4

I/o Expanders Overview

The PCA9536DGKRG4 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 configuration registers for input/output direction control and provides push-pull outputs capable of sourcing 10 mA or sinking 25 mA. It includes power-on reset (POR) functionality and ESD protection rated at 2 kV. Designed for surface mount applications, it is housed in an 8-VSSOP package and functions reliably across an operating temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Supports bidirectional data transfer via I2C and SMBus interfaces
• Configurable input/output directions through dedicated registers
• Includes power-on reset circuitry for reliable initialization

I/o Expanders Applications

• Portable equipment requiring additional GPIO pins
• Consumer electronics with limited microcontroller pins
• Industrial control systems needing remote I/O expansion

I/o Expanders Procurement Notes

Verify the specific suffix DGKRG4 against official manufacturer documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for the 8-VSSOP form factor. Cross-reference RoHS compliance status with current regulatory requirements before procurement.

I/o Expanders Selection Notes

Select this component when a low-pin-count I/O expander is required for I2C-based systems. Consider the 4-bit limitation and push-pull output drive strength relative to load requirements. Verify that the 2.3 V minimum supply voltage aligns with the system's power rails.

I/o Expanders Part Context

This part belongs to the PCA9536 family of I/O expanders from Texas Instruments. It serves as a cost-effective solution for adding digital inputs and outputs to I2C-compatible buses. The device complements other interface ICs by extending system connectivity without increasing microcontroller pin usage.

I/o Expanders Replacement Considerations

Direct substitutes include the PCA9536D and PCA9536DRG4. Verify pinout compatibility and electrical characteristics before substitution.