HDSP-301Y 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The HDSP-301Y is a single-character, 7-segment LED display module manufactured by Broadcom Limited. It features a 0.40-inch yellow display with common anode configuration, designed for numeric and alphanumeric applications. The device operates at 2.15V forward voltage with a 20mA test current and delivers 1.8mcd brightness output.

This part is classified as obsolete. Locating equivalent substitute components is necessary to support ongoing production requirements, maintenance operations, and system redesigns where continued availability of the original part cannot be assured.

Key Parameters

Parameter	Value
Manufacturer Part Number	HDSP-301Y
Manufacturer	Broadcom Limited
Display Type	7-Segment
Number of Characters	1
Digit Size	0.40" (10.16mm)
Color	Yellow
Common Pin Configuration	Common Anode
Package Type	10-DIP (0.300", 7.62mm)
Voltage - Forward (Vf) Typical	2.15V
Current - Test	20mA
Millicandela Rating	1.8mcd
Wavelength - Peak	589nm
Power Dissipation (Max)	105mW
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute components for the HDSP-301Y must satisfy the following electrical and mechanical criteria:

Electrical Compatibility:

Display type: 7-Segment configuration
Common pin configuration: Common Anode
Color: Yellow
Forward voltage (Vf): Within acceptable operating range for the application (2.1V to 2.15V nominal)
Test current: 20mA
Wavelength peak: Yellow spectrum (589nm to 590nm)

Mechanical Compatibility:

Package type: 10-DIP (0.300", 7.62mm)
Single character display
Physical dimensions: Compatible with 0.39" to 0.40" digit size

Functional Equivalence:

Brightness output (millicandela rating) must support the intended application
Power dissipation must remain within acceptable thermal limits

The SA39-11YWA from Kingbright meets all specified criteria for direct substitution.

Parameter Comparison

Parameter	HDSP-301Y (Broadcom)	SA39-11YWA (Kingbright)
Display Type	7-Segment	7-Segment
Number of Characters	1	1
Digit Size	0.40" (10.16mm)	0.39" (10.00mm)
Color	Yellow	Yellow
Common Pin Configuration	Common Anode	Common Anode
Package Type	10-DIP (0.300", 7.62mm)	10-DIP (0.300", 7.62mm)
Voltage - Forward (Vf) Typical	2.15V	2.1V
Current - Test	20mA	20mA
Millicandela Rating	1.8mcd	3mcd
Wavelength - Peak	589nm	590nm
Power Dissipation (Max)	105mW	75mW
Product Status	Obsolete	Active

Engineering Selection Recommendations

The SA39-11YWA qualifies as a direct substitute for the HDSP-301Y based on the following factors:

Electrical Compatibility: Both devices operate at nominally equivalent forward voltages (2.15V vs. 2.1V) and identical test current (20mA). The wavelength peak values (589nm vs. 590nm) fall within the yellow spectrum and are visually indistinguishable in typical applications.

Mechanical Compatibility: Both components use identical 10-DIP packaging with 0.300" (7.62mm) pitch. The digit size difference (0.40" vs. 0.39") represents a 2.5% reduction, which is within acceptable tolerance for most display applications and maintains visual consistency in standard viewing distances.

Performance Enhancement: The SA39-11YWA delivers higher brightness output (3mcd vs. 1.8mcd) and lower maximum power dissipation (75mW vs. 105mW), providing improved visibility with reduced thermal load.

Product Status: The SA39-11YWA is classified as Active, ensuring long-term availability and supply chain continuity. The HDSP-301Y obsolete status necessitates transition to an active equivalent.

Compliance: The SA39-11YWA carries RoHS3 compliance certification, meeting current regulatory requirements for electronic components.

Frequently Asked Questions (FAQ)

Q: Can the SA39-11YWA be used as a direct pin-for-pin replacement for the HDSP-301Y?

A: Yes. Both components use 10-DIP packaging with identical 0.300" (7.62mm) pitch. Pin configuration and functional assignment are compatible for common anode 7-segment display applications.

Q: What is the significance of the 0.01" digit size difference between the two displays?

A: The SA39-11YWA digit size is 0.39" compared to the HDSP-301Y at 0.40". This 2.5% reduction is negligible for most applications and maintains visual consistency at standard viewing distances. Physical mounting dimensions remain compatible due to identical DIP packaging.

Q: How do the forward voltage specifications affect circuit design?

A: The SA39-11YWA operates at 2.1V versus the HDSP-301Y at 2.15V. This 0.05V difference is within typical circuit tolerance and does not require redesign of current-limiting resistor networks. Both devices operate at identical 20mA test current.

Q: Does the higher brightness rating of the SA39-11YWA affect compatibility?

A: No. The SA39-11YWA delivers 3mcd compared to 1.8mcd for the HDSP-301Y. Higher brightness is a performance enhancement that improves display visibility without introducing compatibility issues. Existing circuit designs will function correctly with the brighter display.

Q: What is the impact of the wavelength difference (589nm vs. 590nm)?

A: Both wavelengths fall within the yellow spectrum and are visually indistinguishable to the human eye. The 1nm difference has no practical impact on display appearance or application performance.

Q: Why is the SA39-11YWA power dissipation lower than the HDSP-301Y?

A: The SA39-11YWA maximum power dissipation is 75mW versus 105mW for the HDSP-301Y. This represents improved efficiency and reduced thermal load, which is beneficial for circuit design and thermal management.

Q: Is the SA39-11YWA RoHS compliant?

A: Yes. The SA39-11YWA is RoHS3 compliant, meeting current regulatory requirements for electronic components in most markets.

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