PCA9674D,512 Equivalent & Substitute Parts

Part Overview

The PCA9674D,512 is an 8-bit I/O Expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. in a 16-SOIC surface mount package. This part is classified as Obsolete, making equivalent and substitute components necessary for new designs and ongoing production requirements. The device provides push-pull output configuration with 100µA source and 25mA sink current capability, operating across a 2.3V to 5.5V supply range and -40°C to 85°C temperature range.

Substiute Parts

PCA9674D,512

NXP USA Inc.In Stock: 1188PCA9674D,512 Datasheet

Current PartRFQ

PCA9674PW,118

NXP USA Inc.In Stock: 6335PCA9674PW,118 Datasheet

MFR RecommendedRFQ

PCA9534ADW

Texas InstrumentsIn Stock: 877PCA9534ADW Datasheet

MFR RecommendedRFQ

PCA9534ADWR

Texas InstrumentsIn Stock: 3323PCA9534ADWR Datasheet

MFR RecommendedRFQ

PCA9534DW

Texas InstrumentsIn Stock: 782PCA9534DW Datasheet

MFR RecommendedRFQ

PCA9534DWR

Texas InstrumentsIn Stock: 2205PCA9534DWR Datasheet

MFR RecommendedRFQ

TCA9534ADWR

Texas InstrumentsIn Stock: 3016TCA9534ADWR Datasheet

MFR RecommendedRFQ

TCA9534ADWT

Texas InstrumentsIn Stock: 1679TCA9534ADWT Datasheet

MFR RecommendedRFQ

TCA9534DWR

Texas InstrumentsIn Stock: 65813TCA9534DWR Datasheet

MFR RecommendedRFQ

TCA9534DWT

Texas InstrumentsIn Stock: 45334TCA9534DWT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCA9674D,512 is determined by the following critical parameters: 8-bit I/O count, I2C interface compatibility, push-pull output configuration, and surface mount packaging. The substitute parts are grouped into two categories based on electrical and mechanical compatibility:

Category 1: Direct Package Equivalent (16-SOIC) Parts maintaining identical 16-SOIC package dimensions and pinout compatibility with the original PCA9674D,512. These include PCA9534 series variants and TCA9534 series variants from Texas Instruments, all operating at 400 kHz I2C frequency with compatible voltage supply ranges (1.65V ~ 5.5V or 2.3V ~ 5.5V).

Category 2: Alternative Package Form (16-TSSOP) The PCA9674PW,118 provides functional equivalence in a smaller 16-TSSOP package (0.173", 4.40mm Width) while maintaining the same 1 MHz clock frequency and electrical specifications as the original part.

Parameter Comparison

Engineering Selection Recommendations

For Active Production (Recommended): Select from Active status parts: PCA9674PW,118 (NXP, maintains 1 MHz operation), PCA9534DWR (Texas Instruments, 16-SOIC package), TCA9534ADWR, TCA9534DWR, or TCA9534DWT (Texas Instruments, extended voltage range 1.65V ~ 5.5V). These parts carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

For Last Time Buy Applications: PCA9534ADW, PCA9534ADWR, and PCA9534DW remain available with Last Time Buy status. These parts maintain identical 16-SOIC packaging and 2.3V ~ 5.5V supply range compatibility with the original PCA9674D,512.

Package Considerations: The PCA9674PW,118 provides the closest electrical match (1 MHz operation, NXP manufacturer) but requires PCB layout modification due to 16-TSSOP package dimensions (0.173" width versus 0.295" for 16-SOIC). All 16-SOIC variants maintain identical footprint compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PCA9674D,512 with a PCA9534 series part? A: Yes, PCA9534 variants in 16-SOIC packaging provide direct pinout compatibility. The primary difference is reduced clock frequency (400 kHz versus 1 MHz). Verify your application does not require 1 MHz I2C operation before substitution.

Q: What is the difference between PCA9534 and TCA9534 series? A: Both provide 8-bit I2C I/O expansion in 16-SOIC packages with 400 kHz operation. TCA9534 variants support extended voltage range (1.65V ~ 5.5V) compared to PCA9534 (2.3V ~ 5.5V). TCA9534 parts are currently in Active production status with higher inventory availability.

Q: Does the PCA9674PW,118 require design changes? A: The PCA9674PW,118 maintains electrical equivalence and 1 MHz operation but uses 16-TSSOP packaging instead of 16-SOIC. PCB footprint modification is required. Pin configuration remains compatible.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all listed substitute parts carry ROHS3 compliance certification.

Q: Which substitute part has the highest inventory availability? A: TCA9534DWT provides the highest inventory at 45,300 pieces, followed by TCA9534DWR at 65,780 pieces. Both are Active status parts with unlimited moisture sensitivity rating.

Q: Can I use parts with SMBus interface instead of I2C only? A: Yes, SMBus is a superset of I2C protocol. PCA9534 variants supporting both I2C and SMBus are fully compatible with I2C-only applications.