LTS-4301Y 7-Segment Yellow LED Display - Equivalent & Substitute Parts

Part Overview

The LTS-4301Y is a single-character 7-segment yellow LED display manufactured by Lite-On Inc. in a 10-DIP package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The LTS-4301Y operates as a common anode display with a forward voltage of 2.1V and supports test currents of 10mA and 20mA.

Substiute Parts

LTS-4301Y

Lite-On Inc.In Stock: 901LTS-4301Y Datasheet

Current PartRFQ

HDSM-431F

Broadcom LimitedIn Stock: 745HDSM-431F Datasheet

MFR RecommendedRFQ

HDSP-313Y

Broadcom LimitedIn Stock: 754HDSP-313Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTS-4301Y is determined by the following critical parameters:

• Display Type & Configuration: 7-segment, single character, yellow color
• Common Pin Type: Common anode or common cathode (circuit-dependent)
• Electrical Characteristics: Forward voltage (Vf), test current, and power dissipation
• Package Type: DIP or surface-mount alternatives
• Physical Dimensions: Digit size and overall form factor
• Wavelength: Peak emission wavelength in the yellow spectrum (585–595nm range)

Two substitute parts are identified:

1. HDSM-431F (Broadcom Limited): Common anode, surface-mount package (10-SMD, No Lead). Maintains common anode configuration and electrical compatibility with DIP-based designs requiring PCB layout modification.

2. HDSP-313Y (Broadcom Limited): Common cathode, DIP package (10-DIP). Maintains DIP package compatibility but requires circuit redesign due to common cathode configuration versus the original common anode design.

Parameter Comparison

Engineering Selection Recommendations

HDSM-431F Selection Criteria:

• Preferred for new designs requiring surface-mount technology
• Maintains common anode configuration, eliminating circuit redesign
• Active product status with ROHS3 compliance and REACH unaffected designation
• Higher millicandela rating (15mcd) provides increased brightness
• Requires PCB layout modification from DIP to SMD footprint
• MSL rating of 3 requires controlled storage conditions (168 hours at 60% RH, 30°C maximum)

HDSP-313Y Selection Criteria:

• Suitable for through-hole DIP-based designs where package compatibility is prioritized
• Active product status with ROHS3 compliance and REACH unaffected designation
• Maintains MSL 1 rating (unlimited moisture sensitivity)
• Common cathode configuration requires circuit redesign and driver logic inversion
• Lower millicandela rating (1.5mcd) compared to LTS-4301Y
• Digit size tolerance (0.40" vs. 0.39") may affect visual consistency in multi-display applications

Frequently Asked Questions (FAQ)

Q: Can HDSM-431F directly replace LTS-4301Y in existing PCB designs? A: No. HDSM-431F uses a 10-SMD, No Lead surface-mount package versus the 10-DIP through-hole package of LTS-4301Y. PCB layout and footprint redesign is required. However, the common anode configuration and electrical parameters (2.1V Vf, 20mA test current) are compatible.

Q: Why is HDSP-313Y listed as a substitute if it uses common cathode instead of common anode? A: HDSP-313Y maintains the 10-DIP package form factor, allowing direct physical mounting without PCB redesign. However, the common cathode configuration requires circuit-level modifications to driver logic and pull-up/pull-down resistor networks. This substitute is applicable only when circuit redesign is feasible.

Q: What is the impact of the wavelength difference between LTS-4301Y (585nm) and HDSP-313Y (595nm)? A: Both wavelengths fall within the yellow spectrum. The 10nm difference represents a shift toward longer wavelengths (more orange-yellow). Visual perception differences may be minimal in most applications, but color-critical applications should conduct visual comparison testing.

Q: Does the higher millicandela rating of HDSM-431F (15mcd vs. 2.2mcd) affect circuit design? A: The millicandela rating indicates brightness output at specified test conditions. Higher brightness may require reduced forward current or series resistor adjustment to maintain consistent luminosity with the original design. Circuit current limiting should be verified against the 20mA test current specification.

Q: What are the storage and handling implications of HDSM-431F's MSL 3 rating? A: MSL 3 requires storage at ≤60% relative humidity and ≤30°C. Maximum floor life is 168 hours after moisture exposure. HDSP-313Y and LTS-4301Y with MSL 1 have unlimited floor life. Procurement and inventory management must account for this constraint.

Q: Are both substitute parts RoHS and REACH compliant? A: Yes. Both HDSM-431F and HDSP-313Y are ROHS3 compliant and REACH unaffected. The original LTS-4301Y compliance status is not specified in available documentation.