PS9821-1-F4-AX Equivalent & Substitute Parts

Part Overview

The PS9821-1-F4-AX is a Logic Output Optoisolator manufactured by CEL, operating at 2500Vrms isolation voltage with 15Mbps data rate and open collector output configuration. This single-channel device is designed for high-speed digital isolation applications requiring 15kV/µs common mode transient immunity in 8-SSOP surface mount packaging.

The PS9821-1-F4-AX maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching isolation voltage, output type, channel configuration, and package specifications while accounting for variations in data rate and supply voltage requirements.

Substiute Parts

PS9821-1-F4-AX

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

Current PartRFQ

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS9821-1-F4-AX is determined by the following critical parameters:

Primary Matching Criteria:

• Voltage - Isolation: 2500Vrms
• Number of Channels: 1
• Output Type: Open Collector
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Common Mode Transient Immunity: 15kV/µs
• Current - Output / Channel: 25 mA
• Mounting Type: Surface Mount

Secondary Variation Parameters:

• Data Rate (15Mbps vs. 10Mbps)
• Voltage - Supply (2.7V ~ 3.6V vs. 4.5V ~ 5.5V)
• Packaging Format (Tape & Reel vs. Cut Tape vs. Bulk)
• Product Status (Active vs. Not For New Designs)

Substitute parts are classified into two groups: Direct equivalents matching all primary criteria, and similar alternatives with acceptable variations in data rate and supply voltage that maintain functional compatibility within the optoisolator category.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent - PS9821-1-F3-AX:

The PS9821-1-F3-AX manufactured by Renesas Electronics Corporation is a direct functional equivalent to the PS9821-1-F4-AX. Both devices share identical specifications across all primary matching criteria: 2500Vrms isolation, 15Mbps data rate, 15kV/µs CMTI, open collector output, and 8-SOIC package. The PS9821-1-F3-AX maintains Active product status with full RoHS3 compliance. The primary distinction is packaging format (Tape & Reel for both), with the PS9821-1-F3-AX offering higher inventory availability (1389 Pcs vs. 681 Pcs). This part is suitable for direct substitution in applications requiring 2.7V to 3.6V supply voltage.

Similar Alternative - PS9817A-1-F3-AX:

The PS9817A-1-F3-AX is a similar alternative optoisolator with reduced data rate (10Mbps vs. 15Mbps) and different supply voltage range (4.5V ~ 5.5V vs. 2.7V ~ 3.6V). This device maintains all other critical parameters: 2500Vrms isolation, 15kV/µs CMTI, open collector output, 25mA output current, and 8-SOIC package. The PS9817A-1-F3-AX is Active status with RoHS3 compliance and offers the highest inventory availability (32200 Pcs). Substitution is applicable only in applications where the lower data rate and higher supply voltage requirements are compatible with system design specifications.

Legacy Alternative - PS9817A-1-AX:

The PS9817A-1-AX shares identical electrical specifications with PS9817A-1-F3-AX but carries Not For New Designs product status. This device is available in Bulk packaging format. Use of this part is restricted to legacy system maintenance and repair applications only. New designs must not incorporate this component.

All substitute parts maintain RoHS3 compliance, unlimited moisture sensitivity rating, and identical operating temperature range (-40°C ~ 85°C).

Frequently Asked Questions (FAQ)

Q: Can PS9821-1-F3-AX replace PS9821-1-F4-AX in all applications?

A: Yes. The PS9821-1-F3-AX is a direct functional equivalent with identical isolation voltage (2500Vrms), data rate (15Mbps), CMTI (15kV/µs), output type (open collector), and supply voltage range (2.7V ~ 3.6V). Both devices use the same 8-SOIC package and maintain Active product status with RoHS3 compliance.

Q: What is the key difference between PS9821-1-F4-AX and PS9817A-1-F3-AX?

A: The primary differences are data rate and supply voltage. PS9821-1-F4-AX operates at 15Mbps with 2.7V ~ 3.6V supply, while PS9817A-1-F3-AX operates at 10Mbps with 4.5V ~ 5.5V supply. All other parameters including isolation voltage, CMTI, output type, and package remain identical. Substitution requires verification that the application can tolerate the lower data rate and different supply voltage.

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

A: PS9817A-1-AX carries legacy product status. New designs must use PS9817A-1-F3-AX instead, which is Active status and offers superior packaging options (Cut Tape & Digi-Reel vs. Bulk).

Q: Are all substitute parts available in the same package?

A: Yes. All listed parts use 8-SOIC (0.154", 3.90mm Width) surface mount package. However, packaging formats differ: PS9821-1-F4-AX and PS9821-1-F3-AX are supplied in Tape & Reel; PS9817A-1-AX in Bulk; PS9817A-1-F3-AX in Cut Tape & Digi-Reel. Verify packaging requirements for procurement and assembly processes.

Q: What compliance certifications apply to all substitute parts?

A: All parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is Unaffected for all devices. ECCN classification is EAR99 and HTSUS code is 8541.49.8000 across all parts.

Q: Can I use PS9821-1-F3-AX as a drop-in replacement without circuit modification?

A: Yes, for applications using 2.7V ~ 3.6V supply voltage. The PS9821-1-F3-AX is electrically and mechanically identical to PS9821-1-F4-AX. No circuit modifications are required. Verify component placement and PCB layout compatibility with 8-SOIC package specifications.

Q: What inventory considerations apply to part selection?

A: PS9821-1-F4-AX has 681 Pcs available; PS9821-1-F3-AX has 1389 Pcs; PS9817A-1-F3-AX has 32200 Pcs. If supply continuity is critical, PS9817A-1-F3-AX offers the highest availability, provided data rate and supply voltage requirements are met.