APDS-9101-L21 Equivalent & Substitute Parts

Part Overview

The APDS-9101-L21 is a reflective optical sensor manufactured by Broadcom Limited, designed for proximity detection applications requiring a 0.472" (12mm) sensing distance. This phototransistor-based sensor operates in 4-SMD flat lead surface mount packaging. The part is currently obsolete, necessitating identification of functionally compatible alternatives for ongoing design support and component procurement.

Substiute Parts

APDS-9101-L21

Broadcom LimitedIn Stock: 933APDS-9101-L21 Datasheet

Current PartRFQ

HSDL-9100-021

Broadcom LimitedIn Stock: 8693HSDL-9100-021 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the APDS-9101-L21 is constrained by the following critical parameters:

• Sensing method must remain reflective optical
• Mounting type must be surface mount compatible with 4-SMD configuration
• Operating temperature range must encompass the original specification or be acceptable for the application
• Output type and electrical characteristics must support the circuit design requirements

The HSDL-9100-021 is identified as the manufacturer-recommended substitute. This part maintains reflective sensing methodology and 4-SMD surface mount packaging. However, the sensing distance differs at 0.197" (5mm) versus the original 0.472" (12mm), representing a significant functional change that requires application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The HSDL-9100-021 is the active substitute recommended by Broadcom Limited for the obsolete APDS-9101-L21. Selection of this substitute requires evaluation of the following factors:

Sensing distance reduction from 12mm to 5mm represents the primary functional difference and must be validated against application requirements. The output type change from phototransistor to photodiode necessitates circuit redesign for signal conditioning and amplification.

The HSDL-9100-021 provides higher collector and forward current ratings (100 mA versus 20 mA and 60 mA respectively), offering improved drive capability. Response time increases from 3-4µs to 6µs, which may impact timing-critical applications.

The substitute part maintains active product status with ROHS3 compliance and an extended operating temperature range (-40°C to 85°C). Moisture sensitivity level increases from MSL 1 to MSL 3, requiring 168-hour bake-out procedures during assembly if storage conditions exceed specified limits.

Frequently Asked Questions (FAQ)

Q: Can the HSDL-9100-021 be used as a direct pin-for-pin replacement?

A: Both parts use 4-SMD surface mount packaging. However, the output type differs (phototransistor versus photodiode), requiring circuit modifications for signal processing and amplification. Mechanical fit is compatible, but electrical integration requires redesign.

Q: What is the impact of the reduced sensing distance?

A: The HSDL-9100-021 operates at 5mm versus the original 12mm sensing distance. Applications requiring detection at 12mm distance cannot use this substitute without mechanical repositioning or optical system redesign.

Q: Are there compliance differences between these parts?

A: The HSDL-9100-021 is ROHS3 compliant, while the APDS-9101-L21 compliance status is not specified. Both parts are REACH unaffected and carry EAR99 ECCN classification. The substitute has higher moisture sensitivity (MSL 3 versus MSL 1), affecting storage and assembly handling requirements.

Q: How do the electrical characteristics compare?

A: The substitute provides higher current capacity (100 mA collector and forward current versus 20 mA and 60 mA). Response time is slower at 6µs compared to 3-4µs. Operating temperature range is extended to -40°C on the lower end.

Q: Is the HSDL-9100-021 currently available?

A: Yes, the HSDL-9100-021 is active product status with 8617 pieces in stock, available in Cut Tape and Digi-Reel packaging options.