PCA9535EDWR2G

I/o Expanders Overview

The PCA9535EDWR2G is a 16-bit I/O expander manufactured by onsemi, designed for I2C and SMBus interfaces. It operates within a supply voltage range of 1.65 V to 5.5 V and features an interrupt output capability. The device utilizes a TSSOP-24 package and supports a maximum clock frequency of 1 MHz. It includes configuration registers for input/output direction control and offers ESD protection rated at 3 kV. The component functions with a typical operating supply current of 100 uA and provides an output current capacity of 50 mA per pin.

I/o Expanders Feature Summary

• Provides 16 general-purpose digital input and output expansion channels via serial communication interfaces.
• Includes dedicated interrupt output functionality to signal state changes to the host processor.
• Supports flexible power supply requirements compatible with various logic families through wide voltage operation.

I/o Expanders Applications

• Portable devices requiring additional GPIO pins within limited space constraints
• Industrial control systems utilizing I2C or SMBus communication protocols
• Consumer electronics needing low-power peripheral expansion

I/o Expanders Procurement Notes

Verify the manufacturer designation carefully, as the PCA9535 part number is widely produced by multiple semiconductor vendors including Texas Instruments. Confirm that the specific suffix 'EDWR2G' corresponds to the onsemi variant rather than other manufacturers' equivalents. Ensure the datasheet matches the required electrical specifications and package dimensions before integration into the design.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion solution is required with I2C compatibility and low power consumption. Consider the TSSOP-24 package size relative to available PCB real estate. Evaluate the operating voltage range against the system's power rails to ensure compatibility with both the controller and the target I/O loads.

I/o Expanders Part Context

This component belongs to the PCA9535 family of I/O expanders, which are standard solutions for adding parallel I/O ports to serial bus systems. The 'E' suffix typically denotes an extended temperature range, while 'DWR' indicates the SOIC/TSSOP package type and tape/reel packaging. The '2G' suffix often signifies RoHS compliance and green manufacturing status.

I/o Expanders Replacement Considerations

Direct substitutes include the PCA9535DW from Texas Instruments in SOIC-24 packages and the PCA9535ECDTR2G from onsemi in TSSOP-24 packages. Verify pinout compatibility and electrical characteristics such as voltage ranges and drive currents before swapping between these variants.