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Texas Instruments PCA9535DW — Analog & Data Acquisition
Texas Instruments

TI PCA9535DW I²C I/O Expander, 16-Bit, 400 kHz, 24-SOIC

MPNPCA9535DW
End of Life

Texas Instruments PCA9535DW, 16-bit I²C/SMBus I/O expander, 400 kHz clock, 2.3V–5.5V supply, push-pull outputs, interrupt output, 24-SOIC package, -40°C to 85°C.

$2.82Ref. price · indicative, final on quote
PCA9535DW datasheet
Packaging24-SOIC (0.295", 7.50mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
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Specifications

PCA9535DW Technical Specifications
ParameterValue
Output typePush-Pull
Mounting typeSurface Mount
Voltage2.3V ~ 5.5V
Current - output source (Sink)10mA, 25mA
Frequency400 kHz
InterfaceI²C, SMBus
Operating temperature-40°C ~ 85°C
PackageTube
FeaturesPOR
Number of i (O)16
Case24-SOIC (0.295\", 7.50mm Width)
Interrupt outputYes

Product details

16-bit I²C GPIO expander for board-level I/O stretch

The Texas Instruments PCA9535DW is a 16-bit I²C and SMBus I/O expander in a 24-SOIC package, designed to add general-purpose digital I/O to a microcontroller or SoC. It operates from a 2.3 V to 5.5 V supply and communicates over a 400 kHz I²C bus. Each of the 16 I/O channels can be configured as input or output, with push-pull outputs capable of sourcing 10 mA and sinking 25 mA. A dedicated interrupt output (INT) notifies the host controller on input change. The POR (power-on reset) feature ensures all I/Os default to inputs at power-up.

Temperature grade and environment

Rated for -40°C to 85°C, the PCA9535DW suits industrial environments — motor drives, outdoor telecom cabinets, factory automation I/O blocks, and HVAC controllers.

Sourcing and lifecycle

For dual-sourcing or supply resilience, the TCA9536ADTMR is a functional alternative — it offers 4 I/O (not 16), operates from 1.65 V, uses open-drain outputs, and extends temperature to 125°C, but it is not a pin-compatible drop-in. The PCA9535DW is the full 16-bit version in the 24-SOIC footprint.

Frequently asked questions

Does PCA9535DW support interrupt output?

Yes, the PCA9535DW has a dedicated interrupt output (INT) that asserts when any input changes state, allowing the host to avoid polling.

What are reliable alternatives or cross references for PCA9535DW?

The TCA9536ADTMR is a functional alternative with 4 I/O, 1.65 V supply, open-drain outputs, and 125°C rating — but it is not pin-compatible and offers fewer I/O. For a full 16-bit drop-in, the PCA9535DW is the standard part.