PCF8575DBQR

I/o Expanders Overview

The PCF8575DBQR is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It provides general-purpose digital input and output expansion via the I2C bus interface, utilizing two bidirectional data lines and one clock line. The device features an interrupt output pin to signal external devices of data changes. It operates within a supply voltage range of 2.5 V to 5.5 V and supports a maximum clock frequency of 400 kHz. The component is housed in a 24-pin TSSOP package with a wide operating temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16-bit I/O expansion through standard I2C and SMBus communication protocols
• Includes dedicated interrupt output capability for efficient event-driven monitoring
• Supports operation across a broad industrial temperature range

I/o Expanders Applications

• Embedded systems requiring additional GPIO pins for sensor interfacing
• Industrial control panels needing remote I/O expansion
• Consumer electronics with limited microcontroller pin availability

I/o Expanders Procurement Notes

Verify the specific suffix 'DBQR' against the official Texas Instruments datasheet to confirm the exact package type (TSSOP) and tape-and-reel packaging configuration. Ensure compatibility with the target system's I2C address settings and voltage levels before procurement.

I/o Expanders Selection Notes

Select this component when a 16-bit I/O solution is required with interrupt functionality. Compare against the PCF8575CDWR variant if a SOIC package is preferred instead of TSSOP. Verify that the 400 kHz I2C speed meets the system's timing requirements.

I/o Expanders Part Context

This part belongs to the PCF8575 family of remote I/O expanders. It shares functional similarities with other Texas Instruments devices like the PCA9535 but lacks configuration registers found in some competitors. It is designed for simple, cost-effective I/O expansion in space-constrained applications.

I/o Expanders Replacement Considerations

The PCF8575CDWR is a documented alternative offering identical functionality in a different SOIC-24 package. Verify pin-to-pin compatibility and software register mapping before substitution.