LC75814VS-TLM-E Equivalent & Substitute Parts

Part Overview

The LC75814VS-TLM-E is a 64-segment LCD driver manufactured by onsemi, designed for surface mount applications in power management and display control systems. This device operates across a 2.7V to 6V supply range with a supply current of 230 µA and supports serial interface communication. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

LC75814VS-TLM-E

onsemiIn Stock: 2253LC75814VS-TLM-E Datasheet

Current PartRFQ

BU91796FS-ME2

Rohm SemiconductorIn Stock: 14956BU91796FS-ME2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC75814VS-TLM-E is determined by the following critical parameters:

Primary Compatibility Criteria:

• Display type: LCD driver functionality
• Interface type: Serial communication protocol
• Supply voltage range: Minimum 2.7V operation capability
• Mounting type: Surface mount package
• RoHS compliance: ROHS3 Compliant status

Secondary Considerations:

• Segment configuration: 64-segment architecture
• Operating temperature range: -40°C minimum threshold
• Package form factor: 30-pin SSOP class packaging

The BU91796FS-ME2 from Rohm Semiconductor qualifies as a functional substitute based on shared LCD driver architecture, serial interface operation, overlapping voltage supply range (2.5V ~ 6V), surface mount configuration, and ROHS3 compliance. While the BU91796FS-ME2 supports an 80-segment configuration and operates across an extended temperature range (-40°C ~ 105°C), these parameters represent enhanced capabilities rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The LC75814VS-TLM-E is classified as obsolete, necessitating alternative component selection for new designs or production restocking. The BU91796FS-ME2 is an active product from Rohm Semiconductor and represents a viable substitute based on functional equivalence in LCD driver architecture and serial interface operation.

Both components maintain ROHS3 compliance and operate within compatible voltage supply ranges. The BU91796FS-ME2 demonstrates superior characteristics in supply current efficiency (12.5 µA versus 230 µA) and extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C). The BU91796FS-ME2 carries AEC-Q100 automotive qualification, indicating enhanced reliability for demanding applications.

Package geometry differences exist: the LC75814VS-TLM-E uses a 30-LSSOP form factor while the BU91796FS-ME2 employs a 32-SOP package. PCB layout modifications may be required to accommodate the different pin count and package dimensions. The BU91796FS-ME2 offers improved moisture handling with MSL 1 rating compared to the MSL 4 rating of the obsolete part.

Frequently Asked Questions (FAQ)

Q: Can the BU91796FS-ME2 directly replace the LC75814VS-TLM-E without design modifications?

A: Functional substitution is possible based on shared LCD driver operation and serial interface architecture. However, package geometry differences (30-pin versus 32-pin, different SOP variants) require PCB layout evaluation and potential redesign of the footprint and routing.

Q: What are the key differences in electrical performance between these parts?

A: The BU91796FS-ME2 operates at significantly lower supply current (12.5 µA versus 230 µA), reducing power consumption. The BU91796FS-ME2 supports an 80-segment configuration compared to the 64-segment architecture of the LC75814VS-TLM-E. Both parts operate within overlapping voltage ranges, though the BU91796FS-ME2 extends the lower limit to 2.5V.

Q: Are there temperature range considerations for substitution?

A: The BU91796FS-ME2 extends the upper operating temperature to 105°C compared to 85°C for the LC75814VS-TLM-E. Both parts maintain the -40°C lower threshold. Applications operating near the 85°C limit of the original part benefit from the extended range of the substitute.

Q: What packaging considerations apply to this substitution?

A: The LC75814VS-TLM-E uses a 30-LSSOP package (0.220" width, 5.60mm) while the BU91796FS-ME2 uses a 32-SOP package (0.213" width, 5.40mm). The increased pin count and different package variant necessitate footprint redesign. The BU91796FS-ME2 packaging offers superior moisture resistance (MSL 1 versus MSL 4).

Q: Is the BU91796FS-ME2 suitable for automotive applications?

A: Yes. The BU91796FS-ME2 carries AEC-Q100 automotive qualification, making it appropriate for automotive-grade applications. The original LC75814VS-TLM-E does not specify automotive qualification.

Q: What is the inventory status of these parts?

A: The LC75814VS-TLM-E is obsolete with 2,158 pieces available in current stock. The BU91796FS-ME2 is an active product with 14,853 pieces in stock, ensuring long-term availability for production requirements.