PCA9538D,118 Equivalent & Substitute Parts

Part Overview

The PCA9538D,118 is an 8-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by NXP Semiconductors in a 16-SOIC package. This component is classified as Obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The part features push-pull output configuration with 10mA/25mA source/sink capability, power-on reset (POR), and interrupt output functionality. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability or active product status.

Substiute Parts

PCA9538D,118

NXP SemiconductorsIn Stock: 745PCA9538D,118 Datasheet

Current PartRFQ

PCA9538PW,118

NXP SemiconductorsIn Stock: 3151PCA9538PW,118 Datasheet

MFR RecommendedRFQ

PCA9538DWR

Texas InstrumentsIn Stock: 3118PCA9538DWR Datasheet

DirectRFQ

PCA9538DW

Texas InstrumentsIn Stock: 947PCA9538DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA9538D,118 are qualified based on strict electrical and mechanical parameter matching. All substitute parts maintain identical specifications across the following critical parameters: 8 I/O lines, I2C/SMBus 400 kHz interface, 2.3V–5.5V supply voltage range, -40°C to 85°C operating temperature, push-pull output configuration, 10mA/25mA source/sink current, interrupt output capability, and POR feature. Substitutes are differentiated by package type (16-SOIC versus 16-TSSOP) and product status (Obsolete, Last Time Buy, or Active). All parts maintain ROHS3 compliance and MSL Level 1 rating.

Parameter Comparison

Engineering Selection Recommendations

Selection among substitute parts is determined by package compatibility and product lifecycle status. The PCA9538PW,118 offers the primary advantage of Active product status with NXP Semiconductors manufacturing continuity, though it requires PCB redesign due to 16-TSSOP package format (0.173" width) versus the original 16-SOIC format (0.295" width). The PCA9538DWR and PCA9538DW maintain identical 16-SOIC package geometry, enabling direct board-level substitution without layout modification, though both carry Last Time Buy status indicating limited future availability. All substitute parts maintain ROHS3 compliance and MSL Level 1 rating consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can PCA9538PW,118 replace PCA9538D,118 without PCB modification?

A: No. The PCA9538PW,118 uses 16-TSSOP packaging (0.173" width) while the original part uses 16-SOIC packaging (0.295" width). PCB footprint redesign is required for this substitution.

Q: Are PCA9538DWR and PCA9538DW pin-compatible with PCA9538D,118?

A: Yes. Both parts use identical 16-SOIC packaging and maintain all electrical specifications. Direct board-level substitution is possible without layout changes.

Q: What is the difference between PCA9538DWR and PCA9538DW?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications and 16-SOIC packaging. The primary difference is packaging format: PCA9538DWR is supplied in Tape & Reel format, while PCA9538DW is supplied in standard packaging.

Q: Do all substitute parts maintain the same I2C/SMBus interface specifications?

A: Yes. All substitute parts operate at 400 kHz clock frequency with I2C and SMBus interface compatibility, 2.3V–5.5V supply voltage range, and identical interrupt output and POR features.

Q: Are there compliance or certification differences among the substitute parts?

A: No. All parts maintain ROHS3 compliance, MSL Level 1 rating, REACH Unaffected status, and identical EAR99 and HTSUS classifications.