OPB687 Equivalent & Substitute Parts

Part Overview

The OPB687 is an optical sensor manufactured by TT Electronics/Optek Technology, designed for PCB mount applications using optical flag sensing methodology. This component features pull-up resistor output configuration with inverted logic, operating across a 4.5V to 16V supply range with 30ns response time. The OPB687 is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations.

Substiute Parts

OPB687

TT Electronics/Optek TechnologyIn Stock: 1078OPB687 Datasheet

Current PartRFQ

OPB680

TT Electronics/Optek TechnologyIn Stock: 1238OPB680 Datasheet

MFR RecommendedRFQ

OPB680

TT Electronics/Optek TechnologyIn Stock: 1238OPB680 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPB687 is based on the following critical parameters that define functional compatibility:

Primary Compatibility Criteria:

• Sensing method: Optical flag detection
• Mounting configuration: Through hole, PCB mount
• Operating temperature range: -40°C ~ 100°C minimum
• Supply voltage compatibility: Overlap with 4.5V ~ 16V range
• Regulatory compliance: ROHS3 compliant, REACH unaffected

The OPB680 qualifies as a substitute based on matching optical flag sensing methodology, identical mounting type (through hole PCB mount), overlapping operating temperature range, and equivalent regulatory compliance status. Both components are manufactured by the same supplier and share the same package classification.

Parameter Comparison

Engineering Selection Recommendations

The OPB680 is the manufacturer-recommended substitute for the obsolete OPB687. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The OPB680 carries active product status, providing ongoing availability and supply chain stability compared to the obsolete OPB687.

The primary design consideration involves output configuration differences: the OPB687 provides pull-up resistor output with inverted logic, while the OPB680 implements transistor output with base-emitter resistor configuration. Circuit-level integration modifications may be required to accommodate this output topology change. Both components share identical mounting methodology (through hole PCB mount) and operating temperature range, supporting direct mechanical and thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can the OPB680 directly replace the OPB687 without circuit modifications?

A: Both components share optical flag sensing methodology, through hole PCB mount configuration, and identical operating temperature range. However, output configuration differs: OPB687 uses pull-up resistor with inverted output, while OPB680 uses transistor output with base-emitter resistor. Circuit-level signal conditioning modifications are necessary to accommodate this output topology difference.

Q: What is the primary reason for substitution?

A: The OPB687 is classified as obsolete. The OPB680 is the manufacturer-recommended alternative with active product status, ensuring long-term availability and supply chain continuity.

Q: Are both components mechanically compatible?

A: Yes. Both the OPB687 and OPB680 utilize through hole mounting on PCB with identical package classification (PCB Mount), supporting direct mechanical interchangeability at the board level.

Q: Do regulatory compliance requirements remain consistent?

A: Yes. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring equivalent regulatory standing for applications requiring these certifications.

Q: What parameters should be evaluated for circuit compatibility?

A: Output configuration represents the critical design parameter. The OPB687 pull-up resistor inverted output differs from the OPB680 transistor base-emitter resistor output. Supply voltage and current requirements must be evaluated against specific circuit design parameters to ensure functional compatibility.