PCA9554DB,112 Equivalent & Substitute Parts

Part Overview

The PCA9554DB,112 is an 8-bit I/O Expander designed for I2C and SMBus communication at 400 kHz, manufactured by NXP USA Inc. in a 16-SSOP surface mount package. This component is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

The PCA9554DB,112 provides 8 programmable I/O lines with push-pull output capability, interrupt output functionality, and power-on reset (POR) features. Its wide supply voltage range (2.3V to 5.5V) and extended operating temperature range (-40°C to 85°C) support diverse industrial and commercial applications.

Substiute Parts

PCA9554DB,112

NXP USA Inc.In Stock: 836PCA9554DB,112 Datasheet

Current PartRFQ

PCA9554DB,118

NXP USA Inc.In Stock: 2804PCA9554DB,118 Datasheet

DirectRFQ

PCA9554DB

Texas InstrumentsIn Stock: 2185PCA9554DB Datasheet

MFR RecommendedRFQ

PCA9554DBR

Texas InstrumentsIn Stock: 3872PCA9554DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9554DB,112 is determined by strict equivalence across the following electrical and mechanical parameters:

• I/O Configuration: 8 programmable I/O lines
• Communication Protocol: I2C and SMBus compatibility at 400 kHz
• Output Characteristics: Push-pull output with 10mA and 25mA source/sink capability
• Voltage Compatibility: 2.3V to 5.5V supply range
• Temperature Range: -40°C to 85°C operating window
• Package Specification: 16-SSOP surface mount form factor
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

All identified substitutes maintain identical electrical specifications and package dimensions, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

PCA9554DB,118 (NXP USA Inc.) is the primary substitute for the PCA9554DB,112. Both components are manufactured by NXP USA Inc. with identical electrical and mechanical specifications. The PCA9554DB,118 carries Active product status, ensuring continued availability and manufacturing support. The difference in packaging format (Tape & Reel versus Tube) does not affect functional compatibility and reflects standard supply chain variations.

PCA9554DB (Texas Instruments) and PCA9554DBR (Texas Instruments) provide cross-manufacturer alternatives with equivalent electrical performance and package specifications. The Texas Instruments variants maintain ROHS3 compliance and identical I/O, interface, voltage, and temperature parameters. The PCA9554DB carries Last Time Buy status, indicating limited future availability. The PCA9554DBR is classified as Obsolete. Selection between NXP and Texas Instruments variants should prioritize supply chain continuity and existing design qualification.

All substitutes are ROHS3 compliant with MSL Rating 1 (Unlimited), supporting unrestricted storage and handling conditions.

Frequently Asked Questions (FAQ)

Q: Can PCA9554DB,118 directly replace PCA9554DB,112 in existing designs?

A: Yes. Both parts are manufactured by NXP USA Inc. with identical electrical specifications, I/O configuration, communication protocol, voltage range, temperature range, and 16-SSOP package dimensions. The only difference is packaging format (Tape & Reel versus Tube), which does not affect circuit functionality.

Q: What is the difference between NXP and Texas Instruments variants?

A: All variants maintain identical electrical and mechanical specifications: 8 I/O lines, I2C/SMBus 400 kHz interface, 2.3V to 5.5V supply, push-pull output, and 16-SSOP package. The difference is manufacturer origin. Selection should be based on supply availability and existing design qualifications.

Q: Does packaging format (Tube vs. Tape & Reel) affect compatibility?

A: No. Packaging format affects only supply chain logistics and handling. The electrical and mechanical specifications of the component remain identical regardless of packaging format.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: What is the significance of Product Status (Active, Obsolete, Last Time Buy)?

A: Product Status indicates manufacturing availability. Active status ensures ongoing production and supply. Last Time Buy indicates limited future production windows. Obsolete status indicates discontinued manufacturing. For new designs, prioritize Active status components. For legacy system support, any status is acceptable if inventory is available.

Q: Can I use Texas Instruments variants in place of NXP components?

A: Yes, provided all electrical and mechanical parameters match, which they do for these I/O expander variants. Cross-manufacturer substitution is valid when specifications are identical. Verify design qualification requirements with your engineering team.