PCA9501D,112 Equivalent & Substitute Parts

Part Overview

The PCA9501D,112 is an 8-channel I/O Expander with I2C and SMBus interface operating at 400 kHz, manufactured by NXP USA Inc. This component features EEPROM and Power-On Reset (POR) functionality in a 20-SOIC package. The part is classified as Obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations. The availability of active alternative packages from the same manufacturer ensures design continuity without functional compromise.

Substiute Parts

PCA9501D,112

NXP USA Inc.In Stock: 933PCA9501D,112 Datasheet

Current PartRFQ

PCA9501PW,118

NXP USA Inc.In Stock: 2368PCA9501PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9501D,112 is determined by strict equivalence across the following critical parameters:

• I/O Channel Count: 8 channels (fixed requirement)
• Communication Protocol: I2C and SMBus at 400 kHz (protocol and speed must match)
• Electrical Specifications: Supply voltage 2.5V ~ 3.6V, output current 100µA source / 25mA sink, push-pull output configuration
• Operating Environment: Temperature range -40°C ~ 85°C, MSL 1 rating
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected status

The PCA9501PW,118 qualifies as a direct substitute based on identical functional parameters across all electrical and operational specifications. The primary difference is the package format: the substitute uses 20-TSSOP instead of 20-SOIC, representing a mechanical variation only. Both packages are surface-mount configurations with equivalent pin counts and signal assignments.

Parameter Comparison

Engineering Selection Recommendations

The PCA9501PW,118 is the direct functional equivalent for the obsolete PCA9501D,112. Selection between these parts depends on PCB layout and mechanical constraints:

PCA9501D,112 (20-SOIC): Use when existing PCB layouts require the larger SOIC package footprint or when component height clearance is not a constraint. This part is obsolete and should be considered only for legacy system maintenance where inventory exists.

PCA9501PW,118 (20-TSSOP): Use for new designs and ongoing production. This part is in active production status, ensuring long-term availability and supply chain stability. The 20-TSSOP package offers reduced board area (0.173" width versus 0.295") and lower profile, beneficial for space-constrained applications.

Both parts maintain identical electrical performance, regulatory compliance (ROHS3, REACH Unaffected), and operational specifications. PCB redesign is required when transitioning from SOIC to TSSOP due to different footprint geometries, though pin assignments remain functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can PCA9501PW,118 directly replace PCA9501D,112 without design changes?

A: Electrical and functional replacement is direct. However, PCB layout modification is required due to different package geometries (SOIC versus TSSOP). Pin assignments are functionally equivalent, but physical footprints differ.

Q: What is the primary reason to substitute the PCA9501D,112?

A: The PCA9501D,112 is classified as Obsolete. The PCA9501PW,118 is in Active production status, providing assured long-term availability and supply chain continuity.

Q: Are there any electrical performance differences between the two parts?

A: No. Both parts operate identically across all specified parameters: 8 I/O channels, I2C/SMBus 400 kHz interface, 2.5V ~ 3.6V supply, -40°C ~ 85°C operating range, and identical output current specifications.

Q: What are the package dimension differences?

A: PCA9501D,112 uses 20-SOIC with 0.295" width and 7.50mm body width. PCA9501PW,118 uses 20-TSSOP with 0.173" width and 4.40mm body width. The TSSOP package is narrower and lower profile.

Q: Do both parts have the same regulatory compliance?

A: Yes. Both are ROHS3 Compliant, REACH Unaffected, with MSL 1 (Unlimited) moisture sensitivity rating and identical ECCN and HTSUS classifications.

Q: Which part should be selected for new designs?

A: PCA9501PW,118 should be selected for new designs due to active production status and superior space efficiency of the TSSOP package.