LA-301YB 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LA-301YB is a single-character, 7-segment LED display module manufactured by Rohm Semiconductor. It features a yellow light-emitting element with common anode configuration, designed for numeric and alphanumeric display applications. The device is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations where this display type is required.

Substiute Parts

LA-301YB

Rohm SemiconductorIn Stock: 758LA-301YB Datasheet

Current PartRFQ

HDSP-U311

Broadcom LimitedIn Stock: 4558HDSP-U311 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LA-301YB is determined by the following critical parameters:

• Display Type: 7-Segment configuration
• Number of Characters: Single character (1)
• Digit/Alpha Size: 0.31" (8.00mm)
• Color: Yellow
• Common Pin Configuration: Common Anode
• Package / Case: 10-DIP (0.209", 5.30mm)

The HDSP-U311 manufactured by Broadcom Limited meets all primary substitution criteria. Both devices share identical display type, character count, digit size, color, common anode configuration, and 10-DIP package specification. Electrical parameters including forward voltage, test current, and power dissipation fall within acceptable operational ranges for typical display applications. Both components maintain ROHS3 compliance and MSL Level 1 rating.

Parameter Comparison

Engineering Selection Recommendations

The HDSP-U311 is a direct substitute for the LA-301YB based on matching mechanical and electrical interface specifications. The substitute maintains identical package footprint, pin configuration, and display format, enabling direct replacement in existing PCB designs without layout modifications.

The HDSP-U311 carries Active product status, ensuring continued availability and supply chain stability compared to the obsolete LA-301YB. Both components maintain equivalent regulatory compliance with ROHS3 certification and MSL Level 1 moisture sensitivity rating.

Electrical parameter variations between the two devices are within acceptable ranges for typical display applications. The HDSP-U311 operates at 2.2V forward voltage versus 2.1V for the LA-301YB, and draws 20mA test current versus 15mA. These differences require verification against specific circuit design requirements, particularly in current-limited driver configurations and power supply specifications.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-U311 replace the LA-301YB in existing designs?

A: Yes. Both devices share identical 10-DIP package footprint, pin configuration, common anode topology, and 0.31" digit size. Direct PCB substitution is mechanically and electrically feasible.

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

A: The HDSP-U311 operates at 2.2V forward voltage (versus 2.1V) and draws 20mA test current (versus 15mA). Peak wavelength differs slightly: 583nm for HDSP-U311 versus 585nm for LA-301YB. Maximum power dissipation is 80mW for HDSP-U311 versus 40mW for LA-301YB.

Q: Are both devices RoHS compliant?

A: Yes. Both LA-301YB and HDSP-U311 are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: Why is the LA-301YB listed as obsolete?

A: The LA-301YB is classified as obsolete by Rohm Semiconductor. The HDSP-U311 maintains Active product status, providing long-term availability for new designs and legacy system support.

Q: What is the brightness difference between these displays?

A: The LA-301YB has a millicandela rating of 6.3mcd, while the HDSP-U311 is rated at 2.74mcd. This difference reflects variations in LED die efficiency and optical design between manufacturers.