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Texas Instruments PCA9554APWR — Interface & Transceivers

PCA9554APWR I2C GPIO Expander, 8 I/O, 400 kHz, 16-TSSOP

MPNPCA9554APWR
Last Buy

Texas Instruments PCA9554APWR, I2C/SMBus 8-bit GPIO expander, 400 kHz clock, 2.3V-5.5V supply, push-pull outputs, interrupt output, POR, -40°C to 85°C, 16-TSSOP package, Tape & Reel.

$0.7936Ref. price · indicative, final on quote
Texas Instruments PCA9554APWR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

PCA9554APWR specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Voltage2.3V ~ 5.5V
Current - output source (Sink)10mA, 25mA
Frequency400 kHz
InterfaceI2C, SMBus
Operating temperature-40°C ~ 85°C
PackageTape & Reel (TR) Cut Tape (CT)
FeaturesPOR
Number of i (O)8
Case16-TSSOP (0.173\", 4.40mm Width)
Interrupt outputYes

Product details

The PCA9554APWR carries a Last Buy product status. Buyers still sourcing this exact code should secure inventory through independent distribution channels.

The I2C pins are 5 V tolerant even when VCC is 3.3 V, simplifying mixed-voltage designs. Output source/sink is rated 10 mA source and 25 mA sink per pin, enough to drive LEDs directly or buffer to a small relay coil through a transistor.

Package and footprint — 16-TSSOP, surface mount

The 16-TSSOP body measures 4.40 mm width, standard for this pin count. The footprint is shared with the wider PCA9554 family, so a layout designed for the PCA9554PWR or PCA9554DWR accepts this variant without board changes.

Frequently asked questions

Is PCA9554APWR obsolete?

This part is in Last Time Buy status, so engineers and buyers need to know if they can still purchase or must find a replacement.

What is the replacement for PCA9554APWR?

Since PCA9554APWR is nearing end of life, a direct replacement or alternate part number is critical for product continuity.

Where to buy PCA9554APWR?

Buyers need to find distributors that still have stock of this last-time-buy part.

What is the lead time for PCA9554APWR?

Lead time impacts production planning, especially for parts in limited supply.

What is the difference between PCA9554APWR and PCA9554PWR?

Buyers may confuse the two similar part numbers; understanding the differences (e.g., package, tape vs tube) prevents ordering errors.

What is the operating voltage of PCA9554APWR?

Design engineers need to validate the part fits their power supply range (2.3V to 5.5V).