PCA9554APW,112 Equivalent & Substitute Parts

Part Overview

The PCA9554APW,112 is an 8-bit I/O Expander with I2C and SMBus interface operating at 400 kHz, manufactured by NXP USA Inc. in a 16-TSSOP surface mount package. This part is classified as Obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device provides push-pull output capability with 10mA/25mA source/sink current and operates across a 2.3V to 5.5V supply range with power-on reset (POR) functionality.

Substiute Parts

PCA9554APW,112

NXP USA Inc.In Stock: 2471PCA9554APW,112 Datasheet

Current PartRFQ

PCA9554APW,118

NXP SemiconductorsIn Stock: 2124PCA9554APW,118 Datasheet

DirectRFQ

PCA9554PW,112

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

MFR RecommendedRFQ

PCA9654EDTR2G

onsemiIn Stock: 10226PCA9654EDTR2G Datasheet

MFR RecommendedRFQ

PI4IOE5V9554ALEX

Diodes IncorporatedIn Stock: 11556PI4IOE5V9554ALEX Datasheet

MFR RecommendedRFQ

PI4IOE5V9554LE

Diodes IncorporatedIn Stock: 11004PI4IOE5V9554LE Datasheet

MFR RecommendedRFQ

TCA9534APWR

Texas InstrumentsIn Stock: 2376TCA9534APWR Datasheet

MFR RecommendedRFQ

TCA9534PWR

Texas InstrumentsIn Stock: 165243TCA9534PWR Datasheet

MFR RecommendedRFQ

TCA9554APWR

Texas InstrumentsIn Stock: 164732TCA9554APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9554APW,112 is determined by the following critical parameters: 8 I/O count, I2C interface support, 400 kHz clock frequency, 16-TSSOP package, push-pull output type, and 10mA/25mA output current capability. Parts meeting all these specifications are direct functional equivalents. The voltage supply range (2.3V ~ 5.5V minimum) and operating temperature range (-40°C ~ 85°C minimum) establish baseline compatibility requirements.

Substitute parts are grouped into two categories:

Direct Equivalents (Full Parameter Match): Parts with identical I2C/SMBus 400 kHz operation, 8 I/O, push-pull output, 10mA/25mA current, and matching voltage/temperature ranges.

Compatible Substitutes (Extended Specifications): Parts with wider voltage ranges (1.65V ~ 5.5V) or extended temperature ranges (-55°C ~ 125°C) that exceed the original specifications, providing enhanced operational flexibility while maintaining core functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: PCA9554APW,118 or PCA9554PW,112 are the preferred substitutes. Both are manufactured by NXP with Active product status, matching all electrical specifications and package requirements of the original PCA9554APW,112. These parts provide direct functional replacement with identical I2C/SMBus 400 kHz operation, voltage range, temperature range, and output characteristics. Packaging options (Cut Tape/Digi-Reel or Tube) accommodate different procurement workflows.

Secondary Recommendation: TCA9554APWR (Texas Instruments) provides full functional equivalence with Active product status. It maintains I2C/SMBus 400 kHz operation, push-pull output, and 10mA/25mA current capability. The extended voltage range (1.65V ~ 5.5V) offers additional design flexibility for low-voltage applications while remaining compatible with the original 2.3V ~ 5.5V specification.

Alternative Options: PI4IOE5V9554ALEX and PI4IOE5V9554LE (Diodes Incorporated) are Active alternatives with matching 400 kHz I2C operation and voltage/temperature ranges. However, output type and current specifications are not provided in available documentation, requiring verification against application requirements before selection.

Not Recommended: PCA9654EDTR2G operates at 100 kHz (not 400 kHz) and is Obsolete. TCA9534APWR and TCA9534PWR lack SMBus support and have unspecified output current in one variant, limiting compatibility with SMBus-dependent applications.

Frequently Asked Questions (FAQ)

Q: Can I use PCA9554APW,118 as a direct replacement for PCA9554APW,112?

A: Yes. Both parts are manufactured by NXP with identical electrical specifications: 8 I/O, I2C/SMBus 400 kHz, 2.3V ~ 5.5V supply, -40°C ~ 85°C operating range, push-pull output, and 10mA/25mA current capability. The difference is packaging format (Cut Tape/Digi-Reel vs. Tube) and product status (Active vs. Obsolete). Electrical and functional compatibility is complete.

Q: What is the difference between PCA9554 and TCA9554 variants?

A: Both provide 8-bit I/O expansion at 400 kHz with I2C interface and 16-TSSOP packaging. The primary difference is manufacturer (NXP vs. Texas Instruments) and voltage range: PCA9554 operates 2.3V ~ 5.5V, while TCA9554 operates 1.65V ~ 5.5V. TCA9554APWR additionally supports SMBus, matching the original part's full feature set. Both are Active products with equivalent performance.

Q: Why is PCA9654EDTR2G listed as a substitute if it operates at 100 kHz instead of 400 kHz?

A: PCA9654EDTR2G is included in the substitute list from the provided data but is not recommended for direct replacement due to the 100 kHz clock frequency limitation versus the required 400 kHz. It is suitable only for applications where lower I2C bus speed is acceptable. Its Obsolete status further limits its viability for new designs.

Q: Are the Diodes Incorporated PI4IOE5V9554 parts fully compatible?

A: PI4IOE5V9554ALEX and PI4IOE5V9554LE match the core specifications: 8 I/O, I2C 400 kHz, 2.3V ~ 5.5V, -40°C ~ 85°C, and 16-TSSOP package. However, output type and current source/sink specifications are not documented. Verification against application requirements is necessary before selection, particularly if push-pull output and specific current ratings are critical.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel (PCA9554APW,118, PI4IOE5V9554ALEX, TCA9554APWR, TCA9534APWR, TCA9534PWR), Tube (PCA9554PW,112, PI4IOE5V9554LE), and Tape & Reel (PCA9654EDTR2G). Selection depends on procurement volume and assembly requirements. All maintain identical 16-TSSOP component footprint.

Q: Can I use a part with a wider voltage range in place of the original?

A: Yes. Parts with extended voltage ranges (1.65V ~ 5.5V) are backward compatible with the original 2.3V ~ 5.5V specification. The wider range provides additional design flexibility for low-voltage applications without compromising compatibility with existing 2.3V ~ 5.5V designs. Verify that your application does not require the original minimum voltage threshold.