PCA9557DGVR

I/o Expanders Overview

The PCA9557DGVR is a remote 8-bit I2C and SMBus low-power I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 6 V, with specific documentation citing 2.5 V to 6 V for the DGVR variant. The device supports clock frequencies up to 400 kHz and functions across an operating temperature range of -40°C to +85°C. It features configuration registers and an interrupt pin, housed in a TVSOP-16 package. The component includes ESD protection rated at 2 kV and is RoHS compliant.

I/o Expanders Feature Summary

• Provides general-purpose I/O expansion via I2C and SMBus interfaces
• Includes configuration registers for flexible input/output setup
• Features an interrupt output pin for event signaling
• Supports mixed-mode signal operation with powered-off high-impedance pins

I/o Expanders Applications

• Microcontroller system I/O expansion
• Embedded controller peripheral interfacing
• Industrial control systems requiring remote I/O

I/o Expanders Procurement Notes

Verify the exact suffix against the manufacturer's current datasheet to confirm package type and electrical specifications. Ensure compatibility with system voltage levels and interface requirements before integration. Check for any recent product change notices regarding packaging or material composition updates.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with interrupt capability is required for I2C/SMBus systems. Consider the TVSOP-16 package constraints and the 2.3 V to 6 V operating range. Verify that the 400 kHz maximum clock speed meets system timing requirements.

I/o Expanders Part Context

The PCA9557 is part of the Texas Instruments PCA95xx family of I2C and SMBus devices, which includes repeaters, switches, and expanders. This series provides general-purpose I/O expansion for most microcontroller families via the I2C interface, offering a scalable solution for adding inputs and outputs to embedded systems.

I/o Expanders Replacement Considerations

The PCA9554A is a related device in the same family, also providing 8-bit I/O expansion via I2C. Verify pinout compatibility and specific feature differences such as interrupt handling or voltage tolerances before substituting.