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

Part Overview

The LA-301AB is a single-character red 7-segment LED display manufactured by Rohm Semiconductor in a 10-DIP package. This display module is designed for numeric and alphanumeric applications requiring common anode configuration. The part is currently active in production with 1120 units in stock. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameter ranges for this display category.

Substiute Parts

LA-301AB

Rohm SemiconductorIn Stock: 1169LA-301AB Datasheet

Current PartRFQ

HDSP-U211

Broadcom LimitedIn Stock: 21480HDSP-U211 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Display Configuration: Single character, 7-segment, common anode topology
• Physical Package: 10-DIP form factor with compatible pinout
• Digit Size: 0.31" (8.00mm) character height
• Color Specification: Red wavelength in the 620-640nm range
• Electrical Operating Range: Forward voltage 2.0-2.1V and test current 10-20mA
• Compliance: ROHS3 compliance and MSL 1 rating

The HDSP-U211 from Broadcom Limited meets these substitution criteria within the allowed parameter tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both the LA-301AB and HDSP-U211 are active production parts with ROHS3 compliance and MSL 1 ratings, indicating equivalent environmental and regulatory qualification. The LA-301AB operates at 10mA test current with 2.05V forward voltage, while the HDSP-U211 operates at 20mA with 2.0V forward voltage. Circuit design must account for the higher current requirement of the HDSP-U211 when selecting current-limiting resistors. The wavelength difference (626nm versus 635nm) represents a shift within the red spectrum and does not affect functional compatibility in standard 7-segment display applications. Physical dimensions are equivalent within manufacturing tolerances for 10-DIP packaging.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-U211 directly replace the LA-301AB in existing designs?

A: Direct PCB replacement is possible due to identical 10-DIP pinout and package footprint. However, circuit resistor values must be recalculated to accommodate the HDSP-U211's 20mA test current specification versus the LA-301AB's 10mA requirement.

Q: What is the significance of the wavelength difference between 626nm and 635nm?

A: Both wavelengths fall within the red spectrum range. The 626nm (LA-301AB) represents a slightly shorter wavelength compared to 635nm (HDSP-U211). This difference is not functionally significant for standard numeric display applications.

Q: Are there packaging differences between these parts?

A: Both parts use 10-DIP (0.209", 5.30mm) packaging. The LA-301AB is supplied in Bulk packaging, while the HDSP-U211 is supplied in Tube packaging. Physical dimensions are equivalent within standard manufacturing tolerances.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the LA-301AB and HDSP-U211 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the primary electrical difference between these displays?

A: The HDSP-U211 requires double the test current (20mA versus 10mA) and operates at a slightly lower forward voltage (2.0V versus 2.05V). Maximum power dissipation is correspondingly higher at 105mW versus 65mW.