PCA9500D,112 Equivalent & Substitute Parts

Part Overview

The PCA9500D,112 is an 8-channel I/O Expander IC designed for I2C and SMBus communication at 400 kHz, packaged in a 16-SO surface mount configuration. This component features integrated EEPROM and Power-On Reset (POR) functionality with push-pull output capability. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

PCA9500D,112

NXP USA Inc.In Stock: 829PCA9500D,112 Datasheet

Current PartRFQ

PCA9500PW,118

NXP USA Inc.In Stock: 3446PCA9500PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The PCA9500PW,118 qualifies as a direct functional substitute for the PCA9500D,112 based on the following critical parameters:

Matching Electrical Specifications:

• Identical I/O channel count (8 channels)
• Identical interface protocols (I2C, SMBus 400 kHz)
• Identical feature set (EEPROM, POR)
• Identical output type (Push-Pull)
• Identical current ratings (100µA source, 25mA sink)
• Identical supply voltage range (2.5V ~ 3.6V)
• Identical operating temperature range (-40°C ~ 85°C)

Packaging Difference: The primary distinction is the package format: PCA9500D,112 uses 16-SO (0.295" width), while PCA9500PW,118 uses 16-TSSOP (0.173" width). Both are surface mount packages with equivalent pin configurations and electrical performance.

Product Status Advantage: PCA9500PW,118 maintains Active product status with significantly higher inventory availability (3400 Pcs vs. 755 Pcs), making it the preferred alternative for the obsolete PCA9500D,112.

Parameter Comparison

Engineering Selection Recommendations

The PCA9500PW,118 is the appropriate substitute for the obsolete PCA9500D,112 when electrical and functional requirements are the primary selection criteria. Both components maintain identical ROHS3 compliance and REACH unaffected status, ensuring regulatory consistency.

The transition from 16-SO to 16-TSSOP packaging requires PCB layout modification due to the reduced package width (0.173" vs. 0.295"). This is a mechanical consideration only and does not affect electrical performance or protocol compatibility.

The active product status of PCA9500PW,118 provides supply chain continuity and long-term availability assurance compared to the obsolete PCA9500D,112.

Frequently Asked Questions (FAQ)

Q: Are PCA9500D,112 and PCA9500PW,118 electrically interchangeable?

A: Yes. Both components provide identical electrical specifications including I/O count, interface protocols, supply voltage, operating temperature range, and output characteristics. Substitution is valid from an electrical standpoint.

Q: What is the primary difference between these two parts?

A: The package format differs. PCA9500D,112 uses 16-SO (0.295" width) while PCA9500PW,118 uses 16-TSSOP (0.173" width). This requires PCB footprint redesign but does not affect electrical functionality.

Q: Can I use PCA9500PW,118 as a direct drop-in replacement on existing PCBs designed for PCA9500D,112?

A: No. The different package formats require PCB layout modification. The 16-TSSOP package has a narrower width and different pin spacing compared to 16-SO, necessitating new PCB artwork.

Q: Why is PCA9500D,112 classified as obsolete?

A: Product obsolescence is determined by the manufacturer. The PCA9500PW,118 maintains active status and serves the same functional requirements with improved supply availability.

Q: Are there compliance differences between these parts?

A: No. Both components maintain identical ROHS3 compliance, REACH unaffected status, and MSL rating of 1 (Unlimited).

Q: Which part should I specify for new designs?

A: PCA9500PW,118 is the appropriate choice for new designs due to its active product status and higher inventory availability.