LC75890W-2H Equivalent & Substitute Parts

Part Overview

The LC75890W-2H is an LCD driver IC manufactured by onsemi, designed for 37 and 148 segment LCD display applications. This device operates as a serial interface LCD driver in a 48-LQFP surface mount package. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

LC75890W-2H

onsemiIn Stock: 1558LC75890W-2H Datasheet

Current PartRFQ

BU91600FV-ME2

Rohm SemiconductorIn Stock: 1089BU91600FV-ME2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC75890W-2H is determined by the following critical parameters:

• Display Driver Function: Both the main part and substitute must support LCD segment driver operation with serial interface capability
• Segment Configuration: The substitute must support segment counts compatible with or exceeding the 37/148 segment capability of the main part
• Supply Voltage Range: The substitute voltage range must encompass or exceed the 2.7V ~ 3.6V operating window
• Supply Current: The substitute current consumption must be within acceptable operational limits for the target application
• Operating Temperature Range: The substitute must cover the -40°C ~ 85°C temperature specification
• Package Compatibility: Surface mount packages with compatible pinout and footprint characteristics
• Compliance Standards: RoHS3 compliance and REACH unaffected status must be maintained

The BU91600FV-ME2 from Rohm Semiconductor meets these substitution criteria as an active LCD driver IC with serial interface, expanded segment capability, compatible voltage and temperature ranges, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The BU91600FV-ME2 is the identified substitute for the obsolete LC75890W-2H based on functional equivalence in LCD driver operation and serial interface architecture. Key selection factors include:

• Active Product Status: The BU91600FV-ME2 is an active product with ongoing manufacturer support, addressing the obsolescence of the LC75890W-2H
• Compliance Alignment: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity
• Automotive Qualification: The BU91600FV-ME2 carries AEC-Q100 qualification, providing enhanced reliability documentation for applications requiring automotive-grade components
• Expanded Operating Range: The substitute offers extended voltage range (2.7V ~ 6V) and temperature range (-40°C ~ 105°C), providing design flexibility beyond the original specification
• Package Transition: The shift from 48-LQFP to 40-SSOP requires PCB layout modification and pinout verification during implementation

Frequently Asked Questions (FAQ)

Q: Can the BU91600FV-2H directly replace the LC75890W-2H without PCB modification?

A: No. The package types differ (48-LQFP versus 40-SSOP), requiring PCB footprint redesign. Pinout verification against both datasheets is mandatory before implementation.

Q: What are the key electrical compatibility factors?

A: The substitute operates within the original supply voltage range (2.7V minimum is common to both), maintains comparable supply current (120 µA versus 135 µA), and covers the original temperature range with extended capability to 105°C.

Q: Does the segment configuration difference affect substitution validity?

A: The BU91600FV-ME2 supports 116 segments, which accommodates the 37 and 148 segment configurations of the LC75890W-2H. Segment addressing and control logic must be verified against application requirements.

Q: What is the significance of the MSL rating difference?

A: The LC75890W-2H has MSL 3 (168 hours), while the BU91600FV-ME2 has MSL 1 (unlimited). The substitute offers superior moisture resistance, reducing handling and storage constraints.

Q: Is the AEC-Q100 qualification relevant for non-automotive applications?

A: AEC-Q100 qualification indicates enhanced reliability testing and documentation. For non-automotive applications, this represents an additional quality assurance benefit with no negative impact.

Q: What documentation is required before design implementation?

A: Obtain and compare complete datasheets for both devices, focusing on serial interface protocol, segment addressing schemes, timing specifications, and electrical characteristics to ensure functional compatibility with the target application.