OPL561 Equivalent & Substitute Parts

Part Overview

The OPL561 is an optical sensor manufactured by TT Electronics/Optek Technology, classified as a Photologic® series photo detector with logic output. This component features a 935nm wavelength detection capability with push-pull output configuration in a 3-SIP side-view package. The part is currently active in production with full inventory availability (797 pcs in stock). Substitute parts are identified when equivalent functional performance can be achieved through alternative manufacturers while maintaining compatibility with the specified electrical and mechanical parameters, particularly package form factor, operating temperature range, and output logic characteristics.

Substiute Parts

OPL561

TT Electronics/Optek TechnologyIn Stock: 877OPL561 Datasheet

Current PartRFQ

QSE159

onsemiIn Stock: 1149QSE159 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPL561 are identified based on the following critical parameters that determine functional interchangeability:

• Package / Case: 3-SIP, Side View (mechanical compatibility)
• Operating Temperature Range: -40°C ~ 85°C (thermal operating envelope)
• Category: Optical Sensors (functional classification)
• Type: Photo Detector, Logic Output (core functionality)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected (environmental standards)

The QSE159 from onsemi is identified as a manufacturer-recommended substitute. While the wavelength differs (880nm vs. 935nm) and the output type differs (open collector inverter vs. push-pull), both components share the same package form factor, identical operating temperature range, and equivalent regulatory compliance status. Substitution validity depends on the specific application's tolerance for wavelength variation and output logic inversion requirements.

Parameter Comparison

Engineering Selection Recommendations

Selection between OPL561 and QSE159 is determined by application-specific requirements for wavelength sensitivity and output logic configuration:

The OPL561 operates at 935nm with push-pull output logic, suitable for applications requiring this specific wavelength and output type. The QSE159 operates at 880nm with open collector inverter output, requiring circuit-level accommodation for inverted logic and different wavelength response characteristics.

Both components maintain identical operating temperature ranges (-40°C to 85°C), identical package form factors (3-SIP, side view), and equivalent regulatory compliance (ROHS3 Compliant, REACH Unaffected). Both are active production parts with confirmed inventory availability.

Selection should be based on the application's tolerance for wavelength variation between 880nm and 935nm, and the circuit design's compatibility with push-pull versus open collector inverter output configurations.

Frequently Asked Questions (FAQ)

Q: Can QSE159 be used as a direct replacement for OPL561?

A: QSE159 shares the same package form factor (3-SIP, side view) and operating temperature range (-40°C ~ 85°C) as OPL561. However, the wavelength differs (880nm vs. 935nm) and the output type differs (open collector inverter vs. push-pull). Direct substitution requires application-level verification of wavelength compatibility and output logic circuit compatibility.

Q: What are the key differences between OPL561 and QSE159?

A: The primary differences are wavelength (OPL561: 935nm, QSE159: 880nm) and output type (OPL561: push-pull, QSE159: open collector inverter). Both components are housed in identical 3-SIP side-view packages and operate across the same temperature range.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both OPL561 and QSE159 are ROHS3 Compliant and REACH Unaffected, meeting current environmental regulatory requirements.

Q: What is the moisture sensitivity level for these components?

A: OPL561 has an MSL rating of 1 (Unlimited). QSE159 has MSL listed as Not Applicable. Both components are suitable for standard handling and storage conditions.

Q: Which part should be selected for new designs?

A: Both OPL561 and QSE159 are active production parts. Selection should be based on the specific wavelength requirement (935nm vs. 880nm) and output logic configuration (push-pull vs. open collector inverter) required by the application circuit design.