PS9601 Optoisolator - Equivalent & Substitute Parts

Part Overview

The PS9601 is a logic output optoisolator with open collector output configuration, designed to provide galvanic isolation at 5000Vrms for single-channel digital applications. Manufactured by CEL in an 8-DIP package, this component is classified as obsolete, necessitating the identification of functionally compatible alternatives for new designs and board replacements. The primary substitute, HCPL-2601 from Broadcom Limited, offers comparable electrical performance with active product status and enhanced common mode transient immunity specifications.

Substiute Parts

PS9601

CELIn Stock: 1556PS9601 Datasheet

Current PartRFQ

HCPL-2601

Broadcom LimitedIn Stock: 25229HCPL-2601 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS9601 optoisolator is determined by strict alignment of critical electrical and mechanical parameters: package type (8-DIP through-hole), number of channels (single channel, 1 input / 0 outputs), output configuration (open collector), supply voltage range (4.5V ~ 5.5V), and operating temperature span (-40°C ~ 85°C). The isolation voltage specification of 5000Vrms serves as a performance floor; components with equal or superior isolation ratings are considered functionally compatible. Additionally, current output capability of 50 mA and input type (DC) must be maintained. The HCPL-2601 satisfies all mandatory substitution criteria despite differing in isolation voltage (3750Vrms), common mode transient immunity, and propagation delay characteristics. These differences represent design improvements rather than functional limitations for typical applications.

Parameter Comparison

Engineering Selection Recommendations

The PS9601 is classified as obsolete, making the HCPL-2601 the appropriate replacement for ongoing designs and field repairs. Both components share RoHS non-compliant and REACH-affected status, indicating similar regulatory constraints. The HCPL-2601 maintains compatibility across all mechanical specifications (package, mounting type, pin configuration) and critical electrical parameters (supply voltage, operating temperature, output current capability). The HCPL-2601 carries active product status from Broadcom Limited, ensuring continued availability and manufacturing support. Both components are designated EAR99 for export control purposes and fall under HTSUS classification 8541.49.8000.

Frequently Asked Questions (FAQ)

Can HCPL-2601 be used as a direct replacement for PS9601? Yes. Both components are housed in identical 8-DIP through-hole packages with matching pin configurations, supply voltage requirements (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and output current specifications (50 mA). The electrical interface is functionally equivalent.

What is the significance of the lower isolation voltage rating in HCPL-2601? The HCPL-2601 specifies 3750Vrms isolation versus 5000Vrms for the PS9601. If the application requires 5000Vrms isolation as a hard requirement, the HCPL-2601 may not be suitable. For applications where 3750Vrms isolation is adequate, this difference does not affect substitutability.

Does the Schottky Clamped output in HCPL-2601 affect compatibility? The Schottky clamping in HCPL-2601 is an enhancement to the open collector output architecture. It provides improved transient response without altering the DC electrical interface or switching behavior required by standard applications.

Are there packaging or supply chain differences between these components? The PS9601 is supplied without specified packaging detail, while HCPL-2601 is supplied in tube packaging. Both are through-hole components suitable for identical PCB footprints. The HCPL-2601 offers significantly higher inventory availability (25,200 pieces) compared to the PS9601 (1,466 pieces).

What regulatory compliance should be considered for this substitution? Both components are RoHS non-compliant and REACH Affected/Unaffected respectively. System-level compliance decisions must account for the HCPL-2601's REACH Unaffected status, which may provide advantages in certain regulatory jurisdictions compared to the REACH Affected PS9601.