HDSP-561A 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The HDSP-561A is a single-character red 7-segment LED display module manufactured by Broadcom Limited. This common anode display is designed for numeric and alphanumeric applications requiring compact form factor and low power consumption. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts may be required due to inventory constraints, end-of-life considerations, or application-specific performance requirements within compatible electrical and mechanical parameters.

Substiute Parts

HDSP-561A

Broadcom LimitedIn Stock: 878HDSP-561A Datasheet

Current PartRFQ

LAP-601VB

Rohm SemiconductorIn Stock: 913LAP-601VB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HDSP-561A is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Display Type: 7-Segment (single character only)
• Common Pin Configuration: Common Anode
• Color: Red
• Package Type: 10-DIP (0.600", 15.24mm)
• Wavelength Range: Red spectrum (650nm–660nm acceptable)

Electrical Tolerance Parameters:

• Forward Voltage (Vf): 1.8V nominal; substitutes within 1.9V acceptable for common anode circuits
• Test Current: 20mA nominal; lower current ratings (10mA) acceptable with brightness considerations
• Power Dissipation: Must not exceed circuit design limits

Mechanical Compatibility:

• Digit size and overall package footprint must accommodate PCB layout constraints
• 10-DIP pinout standard ensures direct socket compatibility

The LAP-601VB from Rohm Semiconductor meets all mandatory criteria and falls within acceptable electrical tolerance ranges for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both the HDSP-561A and LAP-601VB are active production parts with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

HDSP-561A Selection Criteria:

• Primary choice for applications requiring the specified 0.52" digit size
• Lower power dissipation (37mW) suitable for battery-powered or thermally constrained designs
• MSL 1 rating eliminates moisture sensitivity concerns in standard storage and handling
• Standard brightness (0.45mcd) appropriate for indoor display applications

LAP-601VB Selection Criteria:

• Acceptable substitute when HDSP-561A inventory is unavailable
• Larger 0.57" digit size may improve visibility in applications where increased character size is beneficial
• Higher brightness (36mcd) suitable for high-ambient-light environments
• MSL 3 rating requires controlled storage conditions (168-hour maximum exposure to 85°C/85% RH)
• Higher power dissipation requires thermal design verification in the application circuit

Both parts share identical 10-DIP package pinout and common anode configuration, enabling direct socket substitution with circuit parameter adjustments for voltage and current differences.

Frequently Asked Questions (FAQ)

Q: Can LAP-601VB be used as a direct drop-in replacement for HDSP-561A?

A: Yes, from a pinout and package perspective. Both use 10-DIP (0.600", 15.24mm) packaging with common anode configuration. However, circuit design adjustments may be necessary due to differences in forward voltage (1.9V vs. 1.8V), test current (10mA vs. 20mA), and brightness characteristics (36mcd vs. 0.45mcd).

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

A: The LAP-601VB operates at 1.9V forward voltage (0.1V higher) and 10mA test current (50% lower). The substitute provides significantly higher brightness (36mcd vs. 0.45mcd) and higher maximum power dissipation (448mW vs. 37mW). Current-limiting resistor values in the circuit must be recalculated for the substitute part.

Q: Will the LAP-601VB fit in the same physical space as HDSP-561A?

A: The 10-DIP package footprint is identical, but the LAP-601VB has a slightly larger overall height (0.748" vs. 0.689") and depth (0.315" vs. 0.276"). Verify clearance in the application enclosure before substitution.

Q: Are there any storage or handling differences?

A: Yes. The HDSP-561A has MSL 1 (unlimited moisture sensitivity), while LAP-601VB has MSL 3 (168-hour limit at 85°C/85% RH). The substitute requires controlled storage conditions and careful handling to prevent moisture absorption before soldering.

Q: How do the wavelength specifications affect color appearance?

A: Both parts emit red light within the standard red spectrum (650nm–660nm). The HDSP-561A peaks at 660nm while LAP-601VB peaks at 650nm. This represents a minor hue difference that is typically imperceptible in most applications but may be noticeable in color-critical displays.

Q: What brightness considerations apply when substituting?

A: The LAP-601VB is approximately 80 times brighter (36mcd vs. 0.45mcd). In applications designed for the lower brightness of HDSP-561A, the substitute may appear excessively bright. Current-limiting resistor adjustment or PWM dimming may be required to match the original display intensity.