PS9817A-2-AX Equivalent & Substitute Parts

Part Overview

The PS9817A-2-AX is a logic output optoisolator manufactured by CEL, part of the NEPOC series. This 2-channel, 2500Vrms isolation device features open collector outputs, 10Mbps data rate capability, and 15kV/µs common mode transient immunity in an 8-SSOP surface mount package. The device is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and production requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer enhanced performance characteristics within compatible application parameters.

Substiute Parts

PS9817A-2-AX

CELIn Stock: 996PS9817A-2-AX Datasheet

Current PartRFQ

PS9817A-2-AX

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

DirectRFQ

PS9817A-2-F3-AX

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

DirectRFQ

PS9821-2-AX

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

SimilarRFQ

PS9821-2-F3-AX

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS9817A-2-AX is determined by strict equivalence in the following critical parameters: number of channels (2), isolation voltage (2500Vrms), common mode transient immunity (15kV/µs), output type (open collector), output current capability (25 mA per channel), propagation delay characteristics (75ns maximum), package type (8-SOIC/8-SSOP), and operating temperature range (-40°C to 85°C).

Direct Equivalents maintain all electrical specifications and differ only in manufacturer designation or packaging format:

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

Similar Substitutes provide enhanced performance in specific parameters while maintaining core isolation, channel count, and package compatibility:

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

The PS9821 series variants operate at higher data rates (15Mbps versus 10Mbps) and support a lower supply voltage range (2.7V ~ 3.6V versus 4.5V ~ 5.5V), making them suitable for applications requiring enhanced speed performance or lower voltage operation while maintaining all other critical isolation and safety parameters.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Electrical Performance):

Use PS9817A-2-F3-AX as the primary replacement for discontinued PS9817A-2-AX. This Renesas Electronics part maintains 100% electrical equivalence across all specified parameters and carries Active product status, ensuring long-term availability and supply chain stability. The Cut Tape & Digi-Reel packaging format supports both prototype and production volume requirements. All ROHS3 compliance and MSL ratings remain identical.

The PS9817A-2-AX (Renesas, Bulk packaging) provides an alternative direct equivalent with identical electrical specifications but carries Not For New Designs status, limiting its suitability for new development programs.

For Performance-Enhanced Substitution:

PS9821-2-F3-AX and PS9821-2-AX offer higher data rate capability (15Mbps versus 10Mbps) and lower supply voltage operation (2.7V ~ 3.6V versus 4.5V ~ 5.5V) while maintaining all critical isolation parameters, channel count, output type, and package compatibility. Both variants carry Active product status. Selection between these options depends on packaging requirements: Cut Tape & Digi-Reel format for PS9821-2-F3-AX or Bulk format for PS9821-2-AX.

All substitute parts maintain 2500Vrms isolation voltage, 15kV/µs CMTI, 25 mA output current per channel, 8-SOIC package footprint, and -40°C to 85°C operating temperature range, ensuring mechanical and thermal compatibility with existing PCB designs and thermal management strategies.

Frequently Asked Questions (FAQ)

Q: Can PS9821-2-AX or PS9821-2-F3-AX be used as direct replacements for PS9817A-2-AX in existing designs?

A: Yes, with design verification. The PS9821 series maintains identical isolation voltage (2500Vrms), channel count (2), output type (open collector), output current (25 mA), package (8-SOIC), and operating temperature range. The primary differences are higher data rate (15Mbps versus 10Mbps) and lower supply voltage range (2.7V ~ 3.6V versus 4.5V ~ 5.5V). If your application operates within the 2.7V ~ 3.6V supply range and does not require the 10Mbps data rate specification, PS9821 variants are compatible. Applications requiring 4.5V ~ 5.5V supply operation must use PS9817A-2-F3-AX.

Q: What is the difference between PS9817A-2-AX and PS9817A-2-F3-AX?

A: Both parts are electrically identical Renesas Electronics optoisolators with matching specifications. The difference is packaging format: PS9817A-2-AX is supplied in Bulk packaging, while PS9817A-2-F3-AX is supplied in Cut Tape (CT) & Digi-Reel format. Cut Tape & Digi-Reel packaging is suitable for automated pick-and-place assembly and smaller production quantities. Bulk packaging is typically used for high-volume orders. Product status differs: PS9817A-2-AX is Not For New Designs, while PS9817A-2-F3-AX is Active.

Q: Why is the original PS9817A-2-AX (CEL) discontinued?

A: The CEL-manufactured PS9817A-2-AX is discontinued at DiGi Electronics. Renesas Electronics manufactures equivalent and compatible variants within the NEPOC series. For new designs and ongoing production, Renesas-manufactured parts ensure supply chain continuity and long-term availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts—PS9817A-2-AX (Renesas), PS9817A-2-F3-AX, PS9821-2-AX, and PS9821-2-F3-AX—carry ROHS3 Compliant status and MSL 1 (Unlimited) moisture sensitivity rating, meeting environmental and reliability requirements for industrial and commercial applications.

Q: What is the significance of 15kV/µs Common Mode Transient Immunity?

A: Common Mode Transient Immunity (CMTI) specifies the maximum rate of change of common mode voltage that the optoisolator can withstand without causing erroneous output transitions. All listed parts maintain 15kV/µs CMTI, ensuring robust isolation performance in high-noise industrial environments, motor drive circuits, and power conversion applications where rapid voltage transients occur.

Q: Can these optoisolators be used interchangeably in high-speed digital isolation applications?

A: PS9817A-2-F3-AX maintains the original 10Mbps data rate specification. PS9821-2-F3-AX and PS9821-2-AX support 15Mbps data rate, providing margin for high-speed applications. All parts maintain identical 75ns maximum propagation delay and 20ns/5ns rise/fall times. Interchangeability depends on your application's data rate requirement and supply voltage constraints.

Q: What inventory levels are available for each part?

A: Current inventory includes: PS9817A-2-AX (Renesas, 1899 Pcs), PS9817A-2-F3-AX (1742 Pcs), PS9821-2-AX (2200 Pcs), and PS9821-2-F3-AX (1446 Pcs). Inventory levels support both prototype development and production volume requirements.