PCA8538UG/2DA/Q1Z Equivalent & Substitute Parts

Part Overview

The PCA8538UG/2DA/Q1Z is an LCD driver die manufactured by NXP USA Inc., classified as a Power Management (PMIC) component. This part supports LCD display configurations with 57, 114, or 918 elements through I2C and SPI interfaces, operating across a supply voltage range of 2.5V to 5.5V. The component is qualified to AEC-Q100 automotive standards and operates reliably from -40°C to 105°C. The product status is obsolete, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing designs while offering active product availability.

Substiute Parts

PCA8538UG/2DA/Q1Z

NXP USA Inc.In Stock: 898PCA8538UG/2DA/Q1Z Datasheet

Current PartRFQ

HV66PG-G

Microchip TechnologyIn Stock: 3296HV66PG-G Datasheet

MFR RecommendedRFQ

HV66PJ-G

Microchip TechnologyIn Stock: 1090HV66PJ-G Datasheet

MFR RecommendedRFQ

LC749402PT-H

onsemiIn Stock: 1144LC749402PT-H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA8538UG/2DA/Q1Z are selected based on the following critical parameters: LCD driver functionality, interface compatibility (I2C or SPI), supply voltage range overlap, operating temperature range, surface mount capability, and compliance certifications (ROHS3, REACH Unaffected, EAR99).

The substitute parts are grouped into two categories:

Group 1: Microchip Technology HV66 Series (HV66PG-G, HV66PJ-G) These parts maintain LCD driver functionality with serial interface capability, surface mount packaging, and ROHS3 compliance. Both operate within the 4.5V to 5.5V supply range and -40°C to 85°C temperature range. The primary distinction is packaging format: HV66PG-G uses 44-PQFP (10x10) with MSL 3, while HV66PJ-G uses 44-PLCC (16.59x16.59) with MSL 1.

Group 2: onsemi LC749402PT-H This part provides LCD driver functionality with I2C interface, supporting the original part's communication protocol. It operates within 2.6V to 3.6V supply range and -40°C to 85°C temperature range, with 100-TQFP surface mount packaging and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Selection of substitute parts depends on design constraints and application requirements:

HV66PG-G and HV66PJ-G Selection These Microchip Technology parts are suitable for applications where serial interface operation is acceptable and supply voltage remains within the 4.5V to 5.5V range. Both parts maintain active product status with full ROHS3 compliance and REACH Unaffected certification. HV66PG-G in 44-PQFP packaging offers MSL 3 (168 Hours) moisture sensitivity, while HV66PJ-G in 44-PLCC packaging provides superior moisture handling with MSL 1 (Unlimited). Selection between these two depends on PCB layout requirements and moisture exposure conditions during assembly and storage.

LC749402PT-H Selection This onsemi part is appropriate for designs requiring I2C interface compatibility with the original PCA8538UG/2DA/Q1Z. The 2.6V to 3.6V supply voltage range restricts use to lower-voltage applications. The 100-TQFP package provides higher pin density compared to the HV66 series. This part maintains active status with ROHS3 compliance and REACH Unaffected certification.

All substitute parts are active products with current manufacturing support, ensuring long-term availability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can HV66PG-G and HV66PJ-G be used interchangeably? A: Both parts share identical electrical specifications (4.5V to 5.5V supply, -40°C to 85°C operating range, 15 mA supply current, serial interface). The primary difference is packaging: HV66PG-G uses 44-PQFP (10x10) with MSL 3, while HV66PJ-G uses 44-PLCC (16.59x16.59) with MSL 1. Selection depends on PCB layout compatibility and moisture sensitivity requirements for your manufacturing process.

Q: What is the key limitation when substituting with LC749402PT-H? A: The LC749402PT-H operates within a 2.6V to 3.6V supply voltage range, which is narrower than the original PCA8538UG/2DA/Q1Z (2.5V to 5.5V). This part is suitable only for applications designed for 3.3V or lower supply voltages. The I2C interface matches the original part's communication capability.

Q: Why is the original PCA8538UG/2DA/Q1Z listed as obsolete? A: The original part is a die-level component, which typically has limited production windows. Active substitute parts in standard packages (44-QFP, 44-PLCC, 100-TQFP) provide equivalent LCD driver functionality with improved availability and manufacturing support.

Q: Are all substitute parts automotive-qualified? A: The substitute parts listed do not explicitly indicate AEC-Q100 qualification in the provided specifications. The original PCA8538UG/2DA/Q1Z carries AEC-Q100 automotive qualification. For automotive applications requiring this qualification, design review and supplier verification are necessary.

Q: What are the moisture sensitivity implications for assembly? A: HV66PG-G carries MSL 3 (168 Hours), requiring bake-out procedures if storage exceeds 168 hours in high-humidity conditions. HV66PJ-G carries MSL 1 (Unlimited), eliminating moisture sensitivity concerns. LC749402PT-H carries MSL 3 (168 Hours). Selection should align with your manufacturing and storage environment.