PCA9537DP,118 Equivalent & Substitute Parts

Part Overview

The PCA9537DP,118 is a 4-channel I/O expander designed for I2C and SMBus communication at 400 kHz, packaged in a 10-TSSOP surface mount configuration. This component operates across a supply voltage range of 2.3V to 5.5V and supports operating temperatures from -40°C to 85°C. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

PCA9537DP,118

NXP USA Inc.In Stock: 1127PCA9537DP,118 Datasheet

Current PartRFQ

PCA9537DPZ

NXP USA Inc.In Stock: 3268PCA9537DPZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9537DP,118 is determined by strict equivalence across the following critical parameters:

• I/O Channel Count: 4 channels (fixed requirement)
• Communication Protocol: I2C and SMBus at 400 kHz (functional requirement)
• Supply Voltage Range: 2.3V ~ 5.5V (electrical compatibility)
• Operating Temperature Range: -40°C ~ 85°C (thermal compatibility)
• Package Type: 10-TFSOP/10-MSOP surface mount (mechanical compatibility)
• Output Configuration: Push-Pull topology (electrical interface)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected (supply chain requirement)

The PCA9537DPZ meets all substitution criteria as a direct functional equivalent manufactured by the same supplier (NXP USA Inc.) with identical electrical specifications and package geometry.

Parameter Comparison

Engineering Selection Recommendations

The PCA9537DPZ is the direct functional equivalent for the obsolete PCA9537DP,118. Both parts are manufactured by NXP USA Inc. and share identical electrical specifications, package geometry, and regulatory compliance certifications (ROHS3 Compliant, REACH Unaffected). The PCA9537DPZ maintains active product status with confirmed inventory availability, making it the appropriate selection for new designs and production continuity. The minor variance in sink current specification (24mA versus 25mA) remains within acceptable engineering tolerances for I/O expander applications and does not affect functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the PCA9537DPZ directly replace the PCA9537DP,118 in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent with identical I/O channel count, communication protocol, supply voltage range, operating temperature range, and package configuration. The PCA9537DPZ is the active production equivalent.

Q: What is the significance of the product status change from Obsolete to Active?

A: The PCA9537DP,118 is no longer manufactured. The PCA9537DPZ is the current production part from NXP USA Inc., ensuring long-term availability for procurement and supply chain continuity.

Q: Are there differences in the output current specifications between these parts?

A: The PCA9537DP,118 specifies 10mA source and 25mA sink current, while the PCA9537DPZ specifies 10mA source and 24mA sink current. This 1mA variance in sink current does not affect functional compatibility for standard I/O expander applications.

Q: Do both parts require the same PCB footprint?

A: Yes. Both parts use the 10-TFSOP/10-MSOP package with 0.118" width (3.00mm). PCB layouts are directly compatible without modification.

Q: Are regulatory certifications identical between the two parts?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected, meeting identical environmental and regulatory requirements.