PCA9536DG4

I/o Expanders Overview

The PCA9536DG4 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 power-on reset (POR) functionality. It is housed in an 8-SOIC package suitable for surface mount installation. The component includes ESD protection rated at 2 kV and functions reliably across an operating temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Provides four bidirectional digital I/O pins accessible via standard I2C or SMBus protocols
• Includes internal configuration registers to define pin directions without external components
• Integrates a power-on reset circuit to ensure predictable initial states upon power-up

I/o Expanders Applications

• Portable consumer electronics requiring additional GPIOs in space-constrained designs
• Industrial control systems utilizing I2C/SMBus communication buses
• Embedded systems needing low-power peripheral expansion

I/o Expanders Procurement Notes

Verify the specific suffix 'DG4' against current manufacturer documentation to confirm RoHS compliance status and lead times, as older variants may have different environmental certifications. Ensure the source distributor provides valid traceability data for this discontinued or legacy part number before finalizing orders.

I/o Expanders Selection Notes

Select this component when a simple 4-bit expansion is required with minimal interface complexity. It is suitable for applications where interrupt capabilities are not needed, unlike the TCA9536 series. Confirm that the 2.3 V minimum supply voltage aligns with the system's logic levels and that the SOIC-8 package fits the PCB footprint constraints.

I/o Expanders Part Context

This part belongs to the PCA9536 family of I/O expanders, designed for low-pin-count applications. It serves as a cost-effective solution for adding digital inputs and outputs to microcontrollers lacking sufficient pins. The DG4 variant typically denotes a specific packaging and environmental compliance version within the broader product line.

I/o Expanders Replacement Considerations

The PCA9536D is listed as obsolete with the PCA9536D,118 from NXP USA Inc. identified as a direct substitute. Verify pin compatibility and electrical specifications before swapping manufacturers.