HDSP-311E Equivalent & Substitute Parts

Part Overview

The HDSP-311E is a single-character red 7-segment LED display module manufactured by Broadcom Limited. This common anode display operates at 2.05V forward voltage with a 20mA test current and delivers 3.2 millicandela brightness. The component is housed in a 14-DIP package with 10 leads and maintains Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory availability, or specific performance characteristics within the defined electrical and mechanical parameters.

Key Parameters

Parameter	Value
Display Type	7-Segment LED
Number of Characters	1
Common Pin Configuration	Common Anode
Color	Red
Digit Size	0.40" (10.16mm)
Package Type	14-DIP (0.300", 7.62mm)
Voltage - Forward (Vf) Typical	2.05V
Current - Test	20mA
Wavelength - Peak	635nm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the HDSP-311E are qualified based on the following electrical and mechanical parameters:

Display Configuration: Single-character, 7-segment, common anode topology
Physical Compatibility: 0.40" digit size with 14-DIP package footprint
Electrical Specifications: Forward voltage range 2.0V–2.05V, test current 20mA
Optical Characteristics: Red wavelength (627nm–635nm), millicandela rating within operational range
Regulatory Compliance: RoHS3 compliance and MSL Level 1 rating

The identified substitutes—LTS-4910AHR (Lite-On Inc.) and SA04-11EWA (Kingbright)—meet these core criteria and are functionally interchangeable within the specified parameter tolerances.

Parameter Comparison

Parameter	HDSP-311E (Broadcom)	LTS-4910AHR (Lite-On)	SA04-11EWA (Kingbright)
Display Type	7-Segment	7-Segment	7-Segment
Number of Characters	1	1	1
Common Pin	Common Anode	Common Anode	Common Anode
Color	Red	Red	Red
Digit Size	0.40" (10.16mm)	0.40" (10.16mm)	0.40" (10.16mm)
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.295", 7.50mm)
Voltage - Forward (Vf) Typical	2.05V	2V	2V
Current - Test	20mA	20mA	20mA
Millicandela Rating	3.2mcd	2.2mcd	5.6mcd
Wavelength - Peak	635nm	635nm	627nm
Power Dissipation (Max)	65mW	75mW	75mW
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain Active product status and full RoHS3 compliance with MSL Level 1 rating, ensuring long-term availability and regulatory alignment. The HDSP-311E and LTS-4910AHR share identical wavelength specifications (635nm), while SA04-11EWA operates at 627nm within the red spectrum range. Brightness variation exists across the three options: HDSP-311E at 3.2mcd, LTS-4910AHR at 2.2mcd, and SA04-11EWA at 5.6mcd. Forward voltage tolerance is maintained across all parts (2.0V–2.05V). Package dimensions show minor variation in the SA04-11EWA (0.295" vs. 0.300" DIP width), which remains within standard PCB footprint tolerances for 14-DIP components. Power dissipation increases marginally in both substitutes (75mW vs. 65mW), remaining within acceptable thermal design margins for typical applications.

Frequently Asked Questions (FAQ)

Q: Can LTS-4910AHR and SA04-11EWA be used interchangeably with HDSP-311E?

A: Yes, both parts are functionally equivalent within the specified electrical and mechanical parameters. All three share common anode configuration, 0.40" digit size, 14-DIP package type, 20mA test current, and 2.0V–2.05V forward voltage range. Brightness and wavelength variations are within acceptable operational tolerances for standard 7-segment display applications.

Q: What are the brightness differences between these parts?

A: HDSP-311E delivers 3.2mcd, LTS-4910AHR delivers 2.2mcd, and SA04-11EWA delivers 5.6mcd. Selection depends on application visibility requirements. Higher brightness (SA04-11EWA) suits applications requiring enhanced visibility; lower brightness (LTS-4910AHR) reduces power consumption in current-limited designs.

Q: Are there package compatibility concerns with SA04-11EWA?

A: SA04-11EWA has a 0.295" DIP width compared to 0.300" for HDSP-311E and LTS-4910AHR. This 0.005" difference falls within standard PCB footprint tolerances for 14-DIP components and does not affect pin alignment or board-level compatibility.

Q: Do all parts meet the same regulatory requirements?

A: Yes. HDSP-311E, LTS-4910AHR, and SA04-11EWA are all ROHS3 compliant with MSL Level 1 rating. REACH status differs: HDSP-311E and SA04-11EWA are REACH Unaffected; LTS-4910AHR is REACH Affected. Verify REACH compliance requirements for your specific application and region.

Q: What is the wavelength difference between SA04-11EWA and the other parts?

A: SA04-11EWA operates at 627nm (orange-red), while HDSP-311E and LTS-4910AHR operate at 635nm (pure red). Both wavelengths are within the red spectrum and visually compatible for most applications. Verify color matching requirements for applications with strict color specifications.

Q: How do power dissipation ratings affect component selection?

A: HDSP-311E dissipates 65mW maximum, while both substitutes dissipate 75mW. The 10mW difference is negligible in most applications. Verify thermal design margins if components operate in high-temperature environments or with current-limiting resistors below 20mA.

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