PS9821-1-F4-A Equivalent & Substitute Parts

Part Overview

The PS9821-1-F4-A is a logic output optoisolator manufactured by CEL, designed for high-speed isolation applications requiring 2500Vrms isolation voltage. This component operates at 15Mbps data rate with open collector output configuration and 15kV/µs common mode transient immunity in an 8-SSOP surface mount package.

The PS9821-1-F4-A is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

PS9821-1-F4-A

CELIn Stock: 729PS9821-1-F4-A Datasheet

Current PartRFQ

PS9821-1-F4-AX

CELIn Stock: 693PS9821-1-F4-AX Datasheet

SimilarRFQ

PS9821-1-F3-AX

Renesas Electronics CorporationIn Stock: 1437PS9821-1-F3-AX Datasheet

DirectRFQ

PS9817A-1-AX

Renesas Electronics CorporationIn Stock: 1283PS9817A-1-AX Datasheet

SimilarRFQ

PS9817A-1-F3-AX

Renesas Electronics CorporationIn Stock: 32294PS9817A-1-F3-AX Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of optoisolators is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Isolation voltage rating (2500Vrms minimum required)
• Number of channels (1 channel)
• Output type (open collector)
• Common mode transient immunity (15kV/µs minimum)
• Propagation delay specifications (75ns maximum)
• Output current capability (25 mA minimum)
• Operating temperature range (-40°C to 85°C)

Mechanical Compatibility Criteria:

• Package type (8-SOIC / 8-SSOP)
• Surface mount configuration
• Moisture sensitivity level (MSL 1)

Supply Voltage Consideration: The main part PS9821-1-F4-A operates at 2.7V ~ 3.6V supply voltage. Substitute parts PS9817A-1-AX and PS9817A-1-F3-AX operate at 4.5V ~ 5.5V supply voltage, requiring circuit redesign for supply voltage compatibility.

Substitute parts are grouped into two categories:

Group 1 - Direct Electrical Equivalents (15Mbps Data Rate):

• PS9821-1-F4-AX (CEL, Active status)
• PS9821-1-F3-AX (Renesas Electronics Corporation, Active status)

Group 2 - Functional Alternatives (10Mbps Data Rate, Supply Voltage Difference):

• PS9817A-1-AX (Renesas Electronics Corporation, Not For New Designs status)
• PS9817A-1-F3-AX (Renesas Electronics Corporation, Active status)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

PS9821-1-F4-AX is the primary substitute for PS9821-1-F4-A. Both components maintain 15Mbps data rate, 2.7V ~ 3.6V supply voltage range, and identical propagation delay specifications. PS9821-1-F4-AX is manufactured by CEL with Active product status and ROHS3 compliance. This part is available in Tape & Reel packaging.

PS9821-1-F3-AX is an equivalent alternative manufactured by Renesas Electronics Corporation with Active product status and ROHS3 compliance. This part maintains all electrical specifications of the main part and is available in Tape & Reel packaging with higher inventory availability (1389 Pcs).

For Supply Voltage Compatibility Consideration:

PS9817A-1-F3-AX is suitable for applications where 4.5V ~ 5.5V supply voltage is available. This part operates at 10Mbps data rate (lower than the main part's 15Mbps) and is manufactured by Renesas Electronics Corporation with Active product status and ROHS3 compliance. This part is available in Cut Tape and Digi-Reel packaging with the highest inventory availability (32200 Pcs).

PS9817A-1-AX is not recommended for new designs due to Not For New Designs product status, despite Active availability and ROHS3 compliance.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating. All parts are classified under ECCN EAR99 and HTSUS 8541.49.8000. REACH status differs between manufacturers: CEL parts show REACH Affected status for the obsolete part, while Renesas parts show REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can PS9821-1-F4-AX be used as a direct replacement for PS9821-1-F4-A?

A: Yes. PS9821-1-F4-AX is electrically and mechanically equivalent to PS9821-1-F4-A. Both components share identical isolation voltage (2500Vrms), data rate (15Mbps), supply voltage range (2.7V ~ 3.6V), propagation delay (75ns), and package configuration (8-SOIC). The primary difference is product status: PS9821-1-F4-AX is Active while PS9821-1-F4-A is Obsolete.

Q: What is the difference between PS9821-1-F3-AX and PS9821-1-F4-AX?

A: Both parts are electrically equivalent with identical specifications for isolation voltage, data rate, supply voltage, and propagation delay. The primary differences are manufacturer (Renesas Electronics Corporation for PS9821-1-F3-AX versus CEL for PS9821-1-F4-AX) and packaging format (Tape & Reel for both). PS9821-1-F3-AX has higher inventory availability.

Q: Can PS9817A-1-F3-AX replace PS9821-1-F4-A in existing designs?

A: PS9817A-1-F3-AX is not a direct replacement due to two critical differences: data rate (10Mbps versus 15Mbps) and supply voltage range (4.5V ~ 5.5V versus 2.7V ~ 3.6V). This part is suitable only for applications where the lower data rate is acceptable and the circuit supply voltage is redesigned to 4.5V ~ 5.5V range.

Q: What is the significance of the packaging format differences?

A: Packaging format affects procurement and assembly processes. PS9821-1-F4-AX and PS9821-1-F3-AX are supplied in Tape & Reel format suitable for automated assembly. PS9817A-1-F3-AX is supplied in Cut Tape and Digi-Reel format. PS9817A-1-AX is supplied in Bulk format. All parts are surface mount compatible with identical 8-SOIC package dimensions.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts (PS9821-1-F4-AX, PS9821-1-F3-AX, PS9817A-1-AX, and PS9817A-1-F3-AX) are ROHS3 compliant. The main part PS9821-1-F4-A does not specify RoHS status.

Q: What is the inventory status of each substitute part?

A: PS9821-1-F4-AX has 681 Pcs available. PS9821-1-F3-AX has 1389 Pcs available. PS9817A-1-AX has 1237 Pcs available. PS9817A-1-F3-AX has 32200 Pcs available. All parts are listed as New Original In Stock.

Q: Why is PS9817A-1-AX marked as Not For New Designs?

A: PS9817A-1-AX carries a Not For New Designs product status designation. This indicates the part is available for existing applications but should not be selected for new design implementations. PS9817A-1-F3-AX is the Active alternative from the PS9817A series.