LC75841PES-H Equivalent & Substitute Parts

Part Overview

The LC75841PES-H is an LCD driver IC manufactured by onsemi, designed to drive 27 or 54 segment LCD displays. This device operates as a serial interface LCD driver in a 36-QFP surface mount package. The product is currently obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

LC75841PES-H

onsemiIn Stock: 10214LC75841PES-H Datasheet

Current PartRFQ

BU91600FV-ME2

Rohm SemiconductorIn Stock: 1089BU91600FV-ME2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC75841PES-H is evaluated based on the following critical parameters that define functional compatibility:

Primary Substitution Criteria:

• Display driver functionality for LCD segments
• Serial interface communication protocol
• Operating voltage range compatibility (4V ~ 6V minimum overlap)
• Operating temperature range (-40°C ~ 105°C)
• Surface mount packaging capability
• RoHS3 compliance for regulatory alignment

The BU91600FV-ME2 qualifies as a substitute based on these parameters. While the BU91600FV-ME2 supports a higher segment count (116 segments versus 27/54 segments) and operates across a wider voltage range (2.7V ~ 6V), it maintains serial interface operation, identical temperature range, surface mount configuration, and equivalent regulatory compliance. The expanded segment capability and lower minimum voltage do not preclude substitution in applications requiring the LC75841PES-H functionality.

Parameter Comparison

Engineering Selection Recommendations

The BU91600FV-ME2 is available as an active product from Rohm Semiconductor with current inventory, whereas the LC75841PES-H is obsolete. Both devices maintain ROHS3 compliance and identical operating temperature specifications. The BU91600FV-ME2 demonstrates superior reliability characteristics with MSL 1 rating compared to MSL 4, and includes AEC-Q100 automotive qualification. The substitute operates at significantly lower supply current (120 µA versus 1.6 mA), providing power efficiency advantages. Package transition from 36-LQFP to 40-SSOP requires PCB layout modification. Serial interface compatibility between devices supports functional substitution in LCD driver applications.

Frequently Asked Questions (FAQ)

Q: Can the BU91600FV-ME2 directly replace the LC75841PES-H without firmware changes?

A: Both devices employ serial interface protocols for LCD segment control. Functional substitution is possible; however, pinout differences between 36-LQFP and 40-SSOP packages require PCB redesign. Serial communication protocol compatibility must be verified against specific application firmware implementation.

Q: What are the package differences between these two parts?

A: The LC75841PES-H uses a 36-LQFP (7x7mm) package, while the BU91600FV-ME2 uses a 40-SSOP (5.40mm width) package. The SSOP package is narrower and requires different PCB footprint design. Pin count differs (36 versus 40), necessitating schematic and layout review.

Q: Is the BU91600FV-ME2 suitable for the same voltage supply range?

A: The BU91600FV-ME2 operates across 2.7V ~ 6V, which encompasses the LC75841PES-H range of 4V ~ 6V. The substitute supports lower minimum voltage operation, providing additional design flexibility.

Q: What is the significance of the segment count difference?

A: The LC75841PES-H supports 27 or 54 segment configurations, while the BU91600FV-ME2 supports 116 segments. Higher segment capability does not prevent substitution in lower-segment applications; however, unused segment outputs must be managed in circuit design.

Q: Are there compliance or qualification differences?

A: Both parts are ROHS3 compliant. The BU91600FV-ME2 includes AEC-Q100 automotive qualification, providing additional reliability assurance. The LC75841PES-H carries no automotive qualification designation.

Q: How do the power consumption characteristics compare?

A: The BU91600FV-ME2 draws 120 µA supply current compared to 1.6 mA for the LC75841PES-H, representing approximately 13x lower power consumption. This advantage may influence system-level power budget calculations.