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Texas Instruments PCA9554PW — Interface & Transceivers

NXP PCA9554PW I²C I/O Expander, 8-bit, 400 kHz, Obsolete

MPNPCA9554PW
Obsolete

NXP PCA9554PW, 8-bit I²C/SMBus I/O expander, 400 kHz, 2.3 V to 5.5 V, push-pull outputs, interrupt output, -40°C to +85°C, 16-TSSOP, Tube.

$2.7000Ref. price · indicative, final on quote
Texas Instruments PCA9554PW datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

PCA9554PW 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
PackageTube
FeaturesPOR
Number of i (O)8
Case16-TSSOP (0.173\", 4.40mm Width)
Interrupt outputYes

Product details

8-bit I/O expansion for the I²C bus — what the PCA9554PW brings

The NXP PCA9554PW is an 8-bit general-purpose I/O expander that connects to a host controller via the I²C bus (or SMBus) at up to 400 kHz. It provides eight push-pull output or input pins, each capable of sinking 25 mA or sourcing 10 mA, and includes a dedicated interrupt output (active-low) to signal the host when any input state changes.

Lifecycle status — this part is officially Obsolete

NXP has classified the PCA9554PW as Obsolete. For new designs, NXP recommends migrating to a current-production equivalent — the PCA9554PW,118 (same die, same package, RoHS-compliant and active) or the PCA9554D (SOIC package variant). For legacy BOM lines, the PCA9554PW can be sourced through independent distribution on a quoted-to-order basis against an RFQ.

Frequently asked questions

What is the replacement for PCA9554PW?

The recommended direct replacement is the PCA9554PW,118, which uses the same die and 16-TSSOP package but carries an active lifecycle status. The PCA9554D (16-SOIC) is another active alternative if the footprint can change.

Can PCA9554PW be used with 3.3V?

Yes.

What is the difference between PCA9554 and PCA9554A?

The PCA9554 and PCA9554A are functionally identical but have different fixed I²C slave addresses. The PCA9554 uses address 0x20 (with three hardware address pins), while the PCA9554A uses address 0x38. If your system cannot accommodate the address change, they are not drop-in replacements without a firmware update.