PCF8575DBR

I/o Expanders Overview

The PCF8575DBR is a remote 16-bit I/O expander manufactured by Texas Instruments, designed for I2C and SMBus communication. It operates within a supply voltage range of 2.5 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features 16 quasi-bidirectional ports with an interrupt output capability. It is housed in a 24-pin TSSOP package (DBR suffix) and functions across a temperature range of -40°C to +85°C. The component includes three hardware address pins to allow connection of up to eight devices on the same bus.

I/o Expanders Feature Summary

• Provides 16 quasi-bidirectional I/O ports for system expansion
• Supports I2C and SMBus interfaces with interrupt output functionality
• Enables multi-device connectivity via configurable hardware address pins

I/o Expanders Applications

• Microcontroller I/O expansion in embedded systems
• Keyboard and display driver circuits
• Industrial control panels requiring additional input/output channels

I/o Expanders Procurement Notes

Verify the specific package type and manufacturer documentation when sourcing. Confirm that the DBR suffix corresponds to the TSSOP-24 package variant. Ensure compatibility with the target I2C bus voltage levels and check for any recent product change notices or lifecycle status updates from Texas Instruments before finalizing procurement plans.

I/o Expanders Selection Notes

Select this component when a design requires expanding GPIO capabilities via a standard two-wire interface. It is suitable for applications needing low-power operation and interrupt-driven event handling. Consider the physical footprint of the TSSOP-24 package during PCB layout. Verify that the required number of addressable nodes does not exceed the limit supported by the three address pins.

I/o Expanders Part Context

This part belongs to the PCF8575 family of remote I/O expanders. It shares functional similarities with other members like the PCF8575C and PCA9535 but differs in specific power characteristics and configuration options. The DBR designation specifically identifies the surface-mount TSSOP packaging option provided by Texas Instruments.

I/o Expanders Replacement Considerations

Direct substitutes include PCF8575C variants and PCA9535. Verify pinout compatibility and register mapping differences before swapping components in existing designs.