PCA9554ADWR Equivalent & Substitute Parts

Part Overview

The PCA9554ADWR is an 8-bit I/O expander IC manufactured by Texas Instruments, designed for I2C and SMBus communication at 400 kHz. This device provides 8 programmable I/O pins with push-pull output capability and power-on reset (POR) functionality in a 16-SOIC surface mount package. The main part is currently in Last Time Buy status, making equivalent substitutes necessary for ongoing design support and procurement planning.

Substiute Parts

PCA9554ADWR

Texas InstrumentsIn Stock: 2168PCA9554ADWR Datasheet

Current PartRFQ

TCA9554ADWR

Texas InstrumentsIn Stock: 2611TCA9554ADWR Datasheet

MFR RecommendedRFQ

PCA9554D,118

NXP USA Inc.In Stock: 100226PCA9554D,118 Datasheet

DirectRFQ

PCA9554AD,118

NXP USA Inc.In Stock: 3992PCA9554AD,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCA9554ADWR is determined by the following critical parameters:

• I/O Count: 8 pins (fixed requirement)
• Interface Protocol: I2C and SMBus compatibility at 400 kHz
• Output Configuration: Push-pull output type
• Voltage Supply Range: Minimum 2.3V operation required
• Package Compatibility: 16-SOIC form factor
• Interrupt Output: Present on all qualified substitutes
• Power-On Reset: Required feature

The substitute parts identified maintain functional equivalence across these parameters while differing in manufacturer, packaging format (Cut Tape vs. Tape & Reel), and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PCA9554D,118 (NXP)

The PCA9554D,118 from NXP USA Inc. is the direct functional equivalent with the highest inventory availability (100,200 pcs). This part maintains identical electrical specifications including voltage supply range (2.3V ~ 5.5V), output current ratings (10mA, 25mA), and operating temperature range. Active product status ensures long-term availability and design support. The part is available in both Cut Tape and Digi-Reel packaging formats, providing flexibility for different procurement volumes.

Secondary Substitute: PCA9554AD,118 (NXP)

The PCA9554AD,118 offers equivalent functionality with Tape & Reel packaging suitable for high-volume automated assembly. Inventory of 3,965 pcs supports medium-term production requirements. Electrical specifications are identical to the main part.

Alternative Substitute: TCA9554ADWR (Texas Instruments)

The TCA9554ADWR maintains Texas Instruments manufacturing continuity with Active product status. This part features an extended lower voltage supply limit (1.65V vs. 2.3V), providing additional design flexibility for low-power applications. Output current specifications are not provided for this variant. Tape & Reel packaging is standard. Inventory of 2,590 pcs supports ongoing procurement.

All substitute parts are ROHS3 compliant, carry MSL rating 1 (Unlimited), and maintain the same 16-SOIC package footprint for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can PCA9554D,118 replace PCA9554ADWR in existing designs?

A: Yes. Both parts share identical I/O count (8), interface protocol (I2C/SMBus 400 kHz), output type (push-pull), voltage supply range (2.3V ~ 5.5V), output current ratings (10mA, 25mA), and 16-SOIC package. No circuit modifications are required.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging is supplied in individual strips suitable for manual handling and small-quantity orders. Tape & Reel (TR) packaging provides components on continuous reels optimized for automated pick-and-place assembly in high-volume production. Electrical performance is identical; packaging choice depends on assembly process and order volume.

Q: Why is the main part (PCA9554ADWR) in Last Time Buy status?

A: Last Time Buy status indicates Texas Instruments has discontinued this specific part number variant. Customers must transition to active alternatives such as the NXP PCA9554D,118 or the Texas Instruments TCA9554ADWR to ensure continued supply.

Q: Does TCA9554ADWR offer any advantages over PCA9554D,118?

A: The TCA9554ADWR supports a lower minimum supply voltage (1.65V vs. 2.3V), enabling operation in ultra-low-power applications. However, output current specifications are not provided for this part. For standard 2.3V ~ 5.5V applications, PCA9554D,118 is recommended due to documented current ratings.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitutes are ROHS3 compliant with MSL rating 1 (Unlimited), meeting environmental and reliability standards for industrial and commercial applications.

Q: Can I mix different substitute parts in the same production batch?

A: Yes, provided your design accommodates the specified electrical parameters. All substitutes maintain identical I/O functionality, interface protocol, and package footprint. Verify output current requirements match your application load before selecting between variants with different current specifications.