LTC-4727WC Equivalent & Substitute Parts

Part Overview

The LTC-4727WC is a 4-character red 7-segment LED display module manufactured by Lite-On Inc., designed for clock and numeric display applications. This component features a common cathode configuration with 0.39" character size in a 16-DIP package. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations where equivalent functionality is required.

Substiute Parts

LTC-4727WC

Lite-On Inc.In Stock: 1099LTC-4727WC Datasheet

Current PartRFQ

TDCR1060M

Vishay Semiconductor Opto DivisionIn Stock: 4723TDCR1060M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTC-4727WC is determined by strict alignment of the following critical parameters:

• Display Configuration: 4-character, 7-segment, common cathode architecture
• Physical Form Factor: 0.39" character size with 16-DIP package footprint and compatible dimensions
• Electrical Characteristics: Forward voltage and test current specifications that permit direct circuit integration
• Color and Wavelength: Red LED emission within the visible spectrum
• Compliance Standards: RoHS3 compliance and MSL rating for manufacturing compatibility

The TDCR1060M from Vishay Semiconductor Opto Division satisfies these substitution criteria through identical display configuration, package type, character size, and compliance certifications. Variations in forward voltage (2V vs. 1.7V), test current (20mA vs. 5mA), brightness (6mcd vs. 3.4mcd), and wavelength (631nm vs. 660nm) represent measurable differences that must be evaluated within specific circuit design parameters.

Parameter Comparison

Engineering Selection Recommendations

The TDCR1060M qualifies as a functional substitute for the LTC-4727WC based on matching display architecture, package footprint, and regulatory compliance. Both components are RoHS3 compliant with MSL rating of 1, ensuring compatibility with standard manufacturing processes.

The obsolete status of the LTC-4727WC contrasts with the active product status of the TDCR1060M, establishing the latter as the appropriate selection for new designs and ongoing production support. The substitute part maintains identical physical form factor and electrical interface, permitting direct PCB-level replacement without layout modification.

Electrical parameter differences—specifically the 0.3V increase in forward voltage and 15mA increase in test current—require circuit-level evaluation to confirm compatibility with existing current-limiting resistor networks and power supply specifications. The TDCR1060M delivers higher brightness output (6mcd vs. 3.4mcd) and operates at a shorter peak wavelength (631nm vs. 660nm), which may produce perceptible color and intensity variations in visual applications.

Frequently Asked Questions (FAQ)

Q: Can the TDCR1060M directly replace the LTC-4727WC without PCB modifications?

A: The TDCR1060M maintains identical 16-DIP package pinout and physical dimensions (within 0.01" tolerance), permitting direct socket-level replacement. However, circuit-level adjustments to current-limiting resistors may be necessary to accommodate the higher forward voltage and test current specifications.

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

A: The TDCR1060M operates at 2V forward voltage compared to 1.7V for the LTC-4727WC, with test current of 20mA versus 5mA. These differences affect resistor selection in the display driver circuit. The TDCR1060M also produces higher brightness (6mcd vs. 3.4mcd) and emits at 631nm wavelength versus 660nm, resulting in a slightly different red hue.

Q: Are both parts RoHS compliant?

A: Yes, both the LTC-4727WC and TDCR1060M are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level), meeting current environmental and manufacturing standards.

Q: Why is the LTC-4727WC listed as obsolete?

A: The LTC-4727WC has reached end-of-life status with Lite-On Inc. The TDCR1060M from Vishay represents an active, currently manufactured alternative that fulfills the same functional requirements.

Q: What should be verified before implementing the TDCR1060M as a substitute?

A: Confirm that the circuit's current-limiting resistor network accommodates the 2V forward voltage and 20mA test current. Verify that the increased brightness and wavelength shift (631nm vs. 660nm) are acceptable for the intended visual application. Validate that the power supply can deliver the higher current demand.

Q: Are the physical dimensions identical?

A: Dimensions are nearly identical with negligible variation: LTC-4727WC measures 12.80mm x 40.18mm x 7.00mm, while TDCR1060M measures 12.80mm x 40.20mm x 7.00mm. The 0.02mm difference in width is within standard manufacturing tolerance and does not affect PCB placement or mechanical fit.