LC75863WS-E Equivalent & Substitute Parts

Part Overview

The LC75863WS-E is an LCD driver IC manufactured by onsemi, designed for 75-segment LCD display applications. This Surface Mount device operates in the 4.5V to 6V supply voltage range with a supply current of 270 µA and supports serial interface communication. The product is classified as obsolete, making identification of functionally compatible substitute components essential for ongoing system support, maintenance, and new design implementations where legacy display driver functionality is required.

Substiute Parts

LC75863WS-E

onsemiIn Stock: 1450LC75863WS-E Datasheet

Current PartRFQ

LC75857WS-E

SanyoIn Stock: 8668LC75857WS-E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC75863WS-E is evaluated based on the following critical parameters that define functional compatibility:

Primary Substitution Criteria:

• Display Type: LCD driver functionality
• Interface: Serial communication protocol
• Voltage Supply Range: Compatibility with 4.5V ~ 6V operating window
• Operating Temperature Range: -40°C ~ 85°C thermal envelope
• Mounting Type: Surface Mount technology
• Package Classification: LQFP/SQFP form factor

The LC75857WS-E, manufactured by Sanyo, qualifies as a substitute component. While the LC75857WS-E supports higher segment configurations (126 and 164 segments versus 75 segments) and operates across an extended voltage range (2.7V ~ 6V), it maintains compatibility with the core substitution parameters: LCD display driver functionality, serial interface operation, identical operating temperature range, surface mount packaging, and LQFP/SQFP package family classification. The extended voltage range of the substitute part provides additional design flexibility without compromising compatibility in systems designed for the original 4.5V ~ 6V specification.

Parameter Comparison

Engineering Selection Recommendations

Both the LC75863WS-E and LC75857WS-E are classified as obsolete products. Selection between these components should be based on the following engineering considerations:

LC75863WS-E (Original Part): Remains the primary choice where existing inventory is available and design specifications are locked to 75-segment configuration with 48-pin packaging. Current supply specification of 270 µA applies to this configuration.

LC75857WS-E (Substitute Part): Suitable for applications where higher segment count capability (126 or 164 segments) can be accommodated within the system design, or where extended voltage range operation (2.7V ~ 6V) provides system-level advantages. The 64-pin package requires PCB layout modification. Supply current increases to 300 µA. Both components maintain identical operating temperature range and serial interface protocol, ensuring functional compatibility at the driver level.

Both parts carry REACH Unaffected and EAR99 ECCN classifications, indicating equivalent regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can the LC75857WS-E directly replace the LC75863WS-E without PCB modification?

A: No. The LC75857WS-E uses a 64-pin LQFP package (10x10 mm) compared to the 48-pin LQFP package (7x7 mm) of the LC75863WS-E. PCB layout and pinout redesign is required. Pin-to-pin compatibility does not exist between these packages.

Q: What is the impact of the higher segment configuration in the LC75857WS-E?

A: The LC75857WS-E supports 126 or 164 segment configurations versus the 75-segment configuration of the LC75863WS-E. If your display requires only 75 segments, the substitute part will operate with unused segment drivers. Firmware or hardware configuration may be required to disable unused segments depending on the application design.

Q: Are there voltage compatibility concerns when substituting?

A: The LC75857WS-E operates across 2.7V ~ 6V, which encompasses the LC75863WS-E specification of 4.5V ~ 6V. Systems designed for 4.5V ~ 6V operation will function with the substitute part. Systems operating below 4.5V will require the LC75857WS-E to achieve compatibility.

Q: What is the significance of the 30 µA increase in supply current?

A: The LC75857WS-E draws 300 µA versus 270 µA for the LC75863WS-E. This 30 µA difference (11% increase) should be evaluated in battery-powered or power-constrained applications. For line-powered systems, this difference is typically negligible.

Q: Do both parts share the same serial interface protocol?

A: Yes. Both the LC75863WS-E and LC75857WS-E implement serial interface communication for LCD driver control. Protocol compatibility exists at the functional level, though specific timing parameters and command sets should be verified against respective datasheets for your application.

Q: What is the Moisture Sensitivity Level (MSL) requirement for the LC75857WS-E?

A: The provided specifications do not include MSL data for the LC75857WS-E. The LC75863WS-E specifies MSL 4 (72 Hours). Consult the Sanyo LC75857WS-E datasheet for equivalent moisture sensitivity classification before implementing in moisture-sensitive manufacturing environments.