PS9821-2-AX Equivalent & Substitute Parts

Part Overview

The PS9821-2-AX is a logic output optoisolator manufactured by Renesas Electronics Corporation, part of the NEPOC series. This component provides 2500Vrms isolation with 2 channels, open collector output configuration, and 15Mbps data rate capability. The device is designed for applications requiring high-speed galvanic isolation in industrial and automotive environments.

The original PS9821-2-AX from CEL is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives. Renesas Electronics Corporation manufactures direct equivalents and similar variants that maintain functional compatibility while offering different packaging and supply voltage options.

Substiute Parts

PS9821-2-AX

CELIn Stock: 2287PS9821-2-AX Datasheet

Current PartRFQ

PS9821-2-AX

Renesas Electronics CorporationIn Stock: 2249PS9821-2-AX Datasheet

DirectRFQ

PS9821-2-F3-AX

Renesas Electronics CorporationIn Stock: 1505PS9821-2-F3-AX Datasheet

DirectRFQ

PS9817A-2-AX

Renesas Electronics CorporationIn Stock: 1949PS9817A-2-AX Datasheet

SimilarRFQ

PS9817A-2-F3-AX

Renesas Electronics CorporationIn Stock: 1801PS9817A-2-F3-AX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS9821-2-AX are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Identical Electrical Performance):

• PS9821-2-AX (Bulk packaging)
• PS9821-2-F3-AX (Cut Tape & Digi-Reel packaging)

These parts maintain all critical parameters: 2500Vrms isolation, 15Mbps data rate, 15kV/µs CMTI, 2-channel configuration, open collector output, and 8-SSOP package. The only differences are packaging format and supply voltage range (2.7V ~ 3.6V). Both are manufactured by Renesas Electronics Corporation and carry Active product status.

Similar Variants (Reduced Data Rate):

• PS9817A-2-AX (Bulk packaging)
• PS9817A-2-F3-AX (Cut Tape & Digi-Reel packaging)

These parts share the same isolation voltage (2500Vrms), channel count (2), CMTI (15kV/µs), output type (open collector), and package (8-SSOP), but operate at 10Mbps data rate instead of 15Mbps. Supply voltage requirement differs (4.5V ~ 5.5V). PS9817A-2-AX is marked "Not For New Designs," while PS9817A-2-F3-AX maintains Active status.

Key Parameters Determining Substitution:

• Isolation voltage: 2500Vrms (fixed across all variants)
• Channel count: 2 (fixed across all variants)
• Output configuration: Open Collector (fixed across all variants)
• Package type: 8-SSOP (fixed across all variants)
• Data rate: 15Mbps (direct equivalents) vs. 10Mbps (similar variants)
• Supply voltage: 2.7V ~ 3.6V (PS9821 series) vs. 4.5V ~ 5.5V (PS9817A series)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select PS9821-2-AX or PS9821-2-F3-AX when the application requires 15Mbps data rate and operates within the 2.7V to 3.6V supply voltage range. Both variants are manufactured by Renesas Electronics Corporation with Active product status, ensuring long-term availability and supply chain stability. PS9821-2-F3-AX offers Cut Tape and Digi-Reel packaging suitable for automated assembly processes, while PS9821-2-AX provides Bulk packaging for high-volume procurement. Both maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

For Reduced Data Rate Applications:

PS9817A-2-F3-AX is suitable when the application can operate at 10Mbps data rate and requires 4.5V to 5.5V supply voltage. This variant maintains Active product status and all other critical parameters (2500Vrms isolation, 15kV/µs CMTI, open collector output, 8-SSOP package). PS9817A-2-AX is available but marked "Not For New Designs" and should be avoided for new product development.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Moisture sensitivity level remains at MSL 1 (unlimited), indicating no special storage or handling requirements.

Frequently Asked Questions (FAQ)

Q: Can PS9821-2-F3-AX be used as a direct replacement for the discontinued PS9821-2-AX?

A: Yes. PS9821-2-F3-AX is electrically and mechanically identical to PS9821-2-AX. The only difference is packaging format: PS9821-2-F3-AX is supplied in Cut Tape and Digi-Reel format, while the original was supplied in Bulk. Both operate at 15Mbps, require 2.7V to 3.6V supply voltage, and are manufactured by Renesas Electronics Corporation with Active product status.

Q: What is the key difference between PS9821 and PS9817A series optoisolators?

A: The primary difference is data rate capability. PS9821 series operates at 15Mbps, while PS9817A series operates at 10Mbps. Additionally, PS9821 requires 2.7V to 3.6V supply voltage, whereas PS9817A requires 4.5V to 5.5V. All other parameters—isolation voltage (2500Vrms), channel count (2), CMTI (15kV/µs), output type (open collector), and package (8-SSOP)—remain identical.

Q: Is PS9817A-2-AX suitable for new product designs?

A: PS9817A-2-AX is marked "Not For New Designs." For new applications requiring the PS9817A variant, use PS9817A-2-F3-AX, which maintains Active product status and identical electrical specifications.

Q: Are there any supply voltage compatibility issues when substituting PS9821 with PS9817A?

A: Yes. PS9821 series operates at 2.7V to 3.6V, while PS9817A series requires 4.5V to 5.5V. Direct substitution is not possible without circuit redesign to accommodate the different supply voltage range. Verify your application's power supply capability before selecting either variant.

Q: Do all substitute parts use the same 8-SSOP package?

A: Yes. All substitute parts—PS9821-2-AX, PS9821-2-F3-AX, PS9817A-2-AX, and PS9817A-2-F3-AX—use the 8-SOIC (0.154", 3.90mm Width) package with 8-SSOP supplier device package designation. PCB layout and footprint compatibility is maintained across all variants.

Q: What is the difference between Bulk and Cut Tape packaging?

A: Bulk packaging (PS9821-2-AX, PS9817A-2-AX) is suitable for manual assembly or lower-volume procurement. Cut Tape and Digi-Reel packaging (PS9821-2-F3-AX, PS9817A-2-F3-AX) is optimized for automated pick-and-place assembly equipment and high-volume production environments. Electrical performance is identical.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements for industrial and consumer applications.