PCA9554APWG4 Equivalent & Substitute Parts

Part Overview

The PCA9554APWG4 is an 8-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by Texas Instruments in a 16-TSSOP surface mount package. This device is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and production requirements. The part provides push-pull output configuration with interrupt output capability and power-on reset (POR) feature, suitable for applications requiring expanded I/O capabilities in embedded systems.

Substiute Parts

PCA9554APWG4

Texas InstrumentsIn Stock: 825PCA9554APWG4 Datasheet

Current PartRFQ

TCA9554APWR

Texas InstrumentsIn Stock: 164732TCA9554APWR Datasheet

MFR RecommendedRFQ

PCA9554APW,118

NXP SemiconductorsIn Stock: 2124PCA9554APW,118 Datasheet

DirectRFQ

PCA9554PW,112

NXP USA Inc.In Stock: 3383PCA9554PW,112 Datasheet

DirectRFQ

PCA9554PW,118

NXP USA Inc.In Stock: 2765PCA9554PW,118 Datasheet

DirectRFQ

PCA9554BPWJ

NXP USA Inc.In Stock: 2493PCA9554BPWJ Datasheet

MFR RecommendedRFQ

PCA9554CPWJ

NXP USA Inc.In Stock: 3892PCA9554CPWJ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCA9554APWG4 is determined by strict equivalence across the following critical parameters:

• 8-bit I/O configuration
• I2C and SMBus protocol support at 400 kHz
• Push-pull output type with 10mA/25mA source/sink capability
• 16-TSSOP package form factor
• Surface mount technology
• Operating temperature range -40°C to 85°C
• Supply voltage compatibility (minimum 2.3V requirement for primary part)
• RoHS3 compliance and MSL Level 1 rating

Substitute parts are grouped by manufacturer and voltage supply range. Parts with extended voltage ranges (1.65V minimum) provide broader application flexibility while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status with established supply availability, addressing the discontinuation of the original PCA9554APWG4. Selection criteria are based on voltage supply requirements and packaging format:

For applications operating at 2.3V or higher, NXP variants PCA9554APW,118, PCA9554PW,112, and PCA9554PW,118 provide direct voltage compatibility with the original part. These parts are available in high quantities and maintain identical electrical specifications.

For applications requiring extended low-voltage operation down to 1.65V, TCA9554APWR (Texas Instruments), PCA9554BPWJ, and PCA9554CPWJ (NXP USA Inc.) offer enhanced voltage range capability. TCA9554APWR provides the highest inventory availability at 164,662 pieces. PCA9554CPWJ offers the largest single-source inventory among extended-range options at 3,784 pieces.

All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and identical 16-TSSOP package specifications. Packaging format differences (Cut Tape, Tube, Tape & Reel) do not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can TCA9554APWR replace PCA9554APWG4 in existing designs?

A: Yes. TCA9554APWR is electrically and mechanically equivalent. The extended voltage range (1.65V ~ 5.5V) provides broader compatibility. Both devices share identical I/O count, interface protocol, clock frequency, output type, and package form factor.

Q: What is the difference between PCA9554APW,118 and PCA9554PW,118?

A: Both parts are NXP variants with identical electrical specifications and 16-TSSOP packaging. The primary difference is packaging format: PCA9554APW,118 is supplied in Cut Tape (CT) & Digi-Reel format, while PCA9554PW,118 is supplied in Cut Tape (CT) & Digi-Reel format. Electrical performance and pin configuration are identical.

Q: Are PCA9554BPWJ and PCA9554CPWJ interchangeable?

A: Yes. Both parts are NXP USA Inc. variants with identical electrical specifications, 8-bit I/O configuration, and 16-TSSOP package. The primary difference is packaging format: PCA9554BPWJ uses Cut Tape (CT) & Digi-Reel packaging, while PCA9554CPWJ uses Tape & Reel (TR) packaging. Electrical performance and pin configuration are identical.

Q: Does voltage supply range affect part selection?

A: Voltage range affects application suitability. Parts with 2.3V ~ 5.5V range (PCA9554APW,118, PCA9554PW,112, PCA9554PW,118) match the original part's voltage specification. Parts with 1.65V ~ 5.5V range (TCA9554APWR, PCA9554BPWJ, PCA9554CPWJ) support lower voltage applications. Select based on your system's minimum supply voltage requirement.

Q: Is the 16-TSSOP package consistent across all substitute parts?

A: Yes. All substitute parts use the 16-TSSOP package with 0.173" width and 4.40mm dimensions. Package form factor is identical across all listed alternatives, ensuring PCB layout compatibility.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for all parts. ECCN classification is EAR99 and HTSUS code is 8542.39.0001 across all variants.