HDSP-315G Equivalent & Substitute Parts

Part Overview

The HDSP-315G is a single-character 7-segment LED display module manufactured by Broadcom Limited. This green display operates at 2.1V forward voltage with 10mA test current and features a 0.40" digit size in a 10-DIP package. The product is currently obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain compatibility with the 10-DIP (0.300", 7.62mm) package and common anode configuration while meeting the electrical and optical requirements of the original application.

Substiute Parts

HDSP-315G

Broadcom LimitedIn Stock: 1620HDSP-315G Datasheet

Current PartRFQ

HDSP-301G

Broadcom LimitedIn Stock: 1481HDSP-301G Datasheet

MFR RecommendedRFQ

LDS-A3902RI

Lumex Opto/Components Inc.In Stock: 886LDS-A3902RI Datasheet

MFR RecommendedRFQ

SA39-11CGKWA

KingbrightIn Stock: 974SA39-11CGKWA Datasheet

MFR RecommendedRFQ

SA39-11GWA

KingbrightIn Stock: 1235SA39-11GWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HDSP-315G are selected based on strict electrical and mechanical compatibility criteria. All substitute parts must meet the following requirements:

Critical Parameters for Substitution:

• Display Type: 7-Segment LED (single character)
• Common Pin Configuration: Common Anode
• Package: 10-DIP (0.300", 7.62mm)
• Color: Green
• Wavelength Range: 565nm to 574nm
• Forward Voltage (Vf): 2.1V to 2.25V
• Power Dissipation (Max): Not exceeding 105mW

The substitute parts are grouped into two categories based on digit size and electrical characteristics:

Group 1 - Broadcom Series (0.40" digit size): HDSP-301G maintains the original 0.40" digit size with identical package dimensions. This part operates at slightly higher voltage (2.25V) and current (20mA) but remains within acceptable substitution parameters.

Group 2 - Alternative Manufacturers (0.39" digit size): LDS-A3902RI (Lumex), SA39-11CGKWA (Kingbright), and SA39-11GWA (Kingbright) feature a 0.39" digit size with identical 10-DIP package footprint. These parts operate within the specified voltage and current ranges with comparable optical output.

Parameter Comparison

Engineering Selection Recommendations

HDSP-301G (Broadcom Limited) is the primary substitute for direct replacement. This part maintains the original 0.40" digit size and identical package dimensions. The forward voltage increase from 2.1V to 2.25V and current increase from 10mA to 20mA are within acceptable operating ranges for most circuit designs. HDSP-301G is actively produced and ROHS3 compliant, providing long-term availability and regulatory compliance.

LDS-A3902RI (Lumex Opto/Components Inc.) provides an alternative with 0.39" digit size. This part matches the original 10mA test current and operates at 2.2V forward voltage. The 0.01" reduction in digit size may require PCB layout verification for visual consistency in multi-digit displays. LDS-A3902RI is actively produced and ROHS3 compliant.

SA39-11CGKWA (Kingbright) offers the highest brightness rating at 21mcd with 0.39" digit size. This part operates at 2.1V forward voltage matching the original specification, but requires 20mA test current. The reduced power dissipation (75mW) provides thermal efficiency benefits. ROHS3 compliant and actively produced.

SA39-11GWA (Kingbright) provides a balanced alternative with 0.39" digit size, 2.2V forward voltage, and 20mA test current. The 6.4mcd brightness and 62.5mW power dissipation offer moderate optical output with improved thermal characteristics. ROHS3 compliant and actively produced.

All substitute parts share identical 10-DIP package footprints and common anode configuration, ensuring direct PCB compatibility. Selection should be based on specific circuit voltage/current requirements and visual brightness requirements for the application.

Frequently Asked Questions (FAQ)

Q: Can HDSP-301G be used as a direct replacement for HDSP-315G?

A: Yes. HDSP-301G maintains the 0.40" digit size and 10-DIP package of the original part. The forward voltage increases from 2.1V to 2.25V and current from 10mA to 20mA. These changes are compatible with standard 7-segment display driver circuits. Verify that your current-limiting resistor values accommodate the 20mA test current.

Q: What is the difference between 0.40" and 0.39" digit sizes?

A: The digit size refers to the height of the displayed character. A 0.40" display is 0.01" (0.254mm) taller than a 0.39" display. In multi-digit applications, this difference may be visually noticeable. Single-digit applications typically show no functional impact. PCB layout remains identical due to matching 10-DIP package dimensions.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. HDSP-301G, LDS-A3902RI, SA39-11CGKWA, and SA39-11GWA are all ROHS3 compliant. The original HDSP-315G RoHS status is not specified in the available data.

Q: Which substitute part has the lowest power consumption?

A: SA39-11GWA has the lowest maximum power dissipation at 62.5mW, followed by SA39-11CGKWA at 75mW. Both HDSP-301G and LDS-A3902RI are rated at 105mW maximum power dissipation, matching the original HDSP-315G specification.

Q: Can I use parts with different forward voltages interchangeably?

A: Forward voltage differences (2.1V to 2.25V range) require circuit verification. If your design uses a fixed voltage supply with current-limiting resistors, the resistor values may need adjustment to maintain proper brightness and current levels. Consult your circuit schematic and driver specifications before substitution.

Q: What is the significance of millicandela (mcd) rating?

A: Millicandela rating indicates the brightness of the display. Higher mcd values produce brighter displays. SA39-11CGKWA (21mcd) is significantly brighter than the original HDSP-315G (5mcd). If brightness consistency is critical for your application, select a substitute with comparable mcd rating or adjust circuit drive current accordingly.

Q: Are all substitute parts available in the same packaging as the original?

A: All substitute parts use 10-DIP (0.300", 7.62mm) package, ensuring identical PCB footprint compatibility. Packaging format (Bulk, Tube) may vary by supplier and does not affect electrical or mechanical compatibility.