HSMD-S670 Equivalent & Substitute Parts

Part Overview

The HSMD-S670 is an orange diffused LED chip in 0805 (2012 Metric) surface mount package, designed for indication applications with a dominant wavelength of 605nm. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The HSMD-S670 operates at 1.9V forward voltage with a 65mcd brightness rating and 165° viewing angle.

Substiute Parts

HSMD-S670

Broadcom LimitedIn Stock: 1070HSMD-S670 Datasheet

Current PartRFQ

HSMD-C170

Broadcom LimitedIn Stock: 15796HSMD-C170 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The HSMD-C170 qualifies as a substitute for the HSMD-S670 based on the following alignment criteria:

Matching Parameters:

• Package / Case: 0805 (2012 Metric)
• Mounting Type: Surface Mount
• Color: Orange
• Lens Transparency: Diffused
• Lens Style: Rectangle with Flat Top
• Size / Dimension: 2.00mm L x 1.25mm W
• Height (Max): 0.80mm
• Current - Test: 20mA
• Wavelength - Dominant: 604nm (within orange spectrum, adjacent to 605nm)

Differing Parameters:

• Voltage - Forward (Vf) (Typ): 2.2V (vs. 1.9V in HSMD-S670)
• Millicandela Rating: 8mcd (vs. 65mcd in HSMD-S670)
• Viewing Angle: 170° (vs. 165° in HSMD-S670)
• Lens Color: White (vs. not specified in HSMD-S670)
• Lens Size: 1.40mm x 1.25mm (vs. 1.30mm x 1.25mm in HSMD-S670)
• Product Status: Active (vs. Obsolete in HSMD-S670)

Parameter Comparison

Engineering Selection Recommendations

The HSMD-C170 is an active product with ROHS3 compliance, providing regulatory advantage over the obsolete HSMD-S670. Both components share identical package dimensions, mounting type, and MSL classification, ensuring mechanical and thermal compatibility in PCB assembly processes.

The primary design consideration is the forward voltage differential: HSMD-C170 operates at 2.2V compared to HSMD-S670 at 1.9V. This 0.3V increase requires circuit-level evaluation to confirm compatibility with existing current-limiting resistor values and power supply specifications.

The brightness differential (8mcd vs. 65mcd) represents a significant reduction in luminous intensity. Application-specific brightness requirements must be assessed to determine if the lower output of HSMD-C170 is acceptable for the intended indication function.

Both parts maintain identical wavelength classification within the orange spectrum (604nm vs. 605nm dominant wavelength), ensuring visual color consistency. The HSMD-C170 provides a marginally wider viewing angle (170° vs. 165°), which may offer improved visibility in certain mounting orientations.

Frequently Asked Questions (FAQ)

Q: Can HSMD-C170 be used as a direct drop-in replacement for HSMD-S670?

A: Mechanical and thermal compatibility is confirmed due to identical package dimensions and mounting specifications. However, electrical circuit validation is required due to the 0.3V forward voltage difference and significant brightness reduction.

Q: What is the impact of the 0.3V forward voltage increase?

A: The HSMD-C170 requires higher voltage to achieve rated brightness. Existing current-limiting resistor calculations based on 1.9V operation will need adjustment for 2.2V operation to maintain proper LED current and prevent over-current conditions.

Q: Is the brightness reduction from 65mcd to 8mcd acceptable?

A: This depends on the application requirements. If the original design relied on the 65mcd output for visibility or signal detection, the 8mcd output may be insufficient. Application-specific brightness testing is necessary to confirm suitability.

Q: Are there packaging or supply chain advantages to using HSMD-C170?

A: HSMD-C170 is an active product with 15,766 pieces in stock, compared to HSMD-S670 which is obsolete. HSMD-C170 is available in Cut Tape and Digi-Reel packaging options, providing supply chain continuity and standard procurement channels.

Q: Do both parts meet the same regulatory requirements?

A: Both components share identical REACH, ECCN, and HTSUS classifications. HSMD-C170 carries ROHS3 compliance certification, providing additional regulatory alignment with current environmental standards.

Q: What is the wavelength difference between these parts?

A: HSMD-S670 has a dominant wavelength of 605nm, while HSMD-C170 is 604nm. Both fall within the orange LED spectrum and produce visually equivalent color output for indication applications.