PS9821-1-F3-AX Equivalent and Substitute Parts

Part Overview

The PS9821-1-F3-AX is a logic output optoisolator manufactured by Renesas Electronics Corporation, operating at 2500Vrms isolation voltage with 15Mbps data rate capability and open collector output configuration. This part is currently active in production and available through distribution channels. Identification of substitute parts is necessary when managing supply chain continuity, addressing inventory constraints, or evaluating performance trade-offs in applications where the primary part may become unavailable or require alternative packaging formats.

Substiute Parts

PS9821-1-F3-AX

CELIn Stock: 1406PS9821-1-F3-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 compatibility for the PS9821-1-F3-AX is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Isolation: 2500Vrms (all substitutes must match)
• Common Mode Transient Immunity: 15kV/µs minimum (all substitutes must match)
• Number of Channels: 1 (all substitutes must match)
• Output Type: Open Collector (all substitutes must match)
• Current - Output / Channel: 25 mA (all substitutes must match)
• Propagation Delay tpLH / tpHL: 75ns maximum (all substitutes must match)
• Package / Case: 8-SOIC (0.154", 3.90mm Width) (all substitutes must match)

Secondary Consideration:

• Data Rate: The PS9821-1-F3-AX operates at 15Mbps. Substitutes with reduced data rate (10Mbps) are applicable where the application maximum frequency requirement does not exceed the substitute specification.
• Voltage - Supply: The PS9821-1-F3-AX requires 2.7V ~ 3.6V. Substitutes requiring 4.5V ~ 5.5V supply voltage necessitate circuit design modifications and are classified as functional substitutes rather than direct replacements.

Parameter Comparison

Engineering Selection Recommendations

PS9821-1-F3-AX (Primary Selection) This is the recommended choice for new applications. The part is in active production status with established manufacturing continuity. It supports the full 15Mbps data rate with 2.7V ~ 3.6V supply voltage operation, making it suitable for low-power and 3.3V logic systems. Tape & Reel packaging supports automated assembly processes.

PS9817A-1-F3-AX (Direct Functional Substitute) This part qualifies as a functional substitute where maximum signal frequency does not exceed 10Mbps. It shares identical isolation voltage, CMTI, propagation delay, output current, and package form factor. The supply voltage requirement of 4.5V ~ 5.5V differs from the primary part and requires circuit modification. This part maintains active production status and shows the highest inventory availability (32200 units). Cut Tape packaging provides flexibility in ordering quantities.

PS9817A-1-AX (Limited Substitution) This part meets the same core electrical specifications as PS9817A-1-F3-AX regarding isolation, CMTI, timing, and output characteristics, operating at 10Mbps maximum. The product status is "Not For New Designs," indicating this part is in end-of-life phase. Use is restricted to sustaining supply for existing production lines where design changes are impractical. Bulk packaging format requires bin-level quantities. This part is not recommended for new design implementations.

Frequently Asked Questions (FAQ)

Q: Can PS9817A-1-F3-AX directly replace PS9821-1-F3-AX without PCB modifications? A: Direct mechanical and package compatibility is established. However, the supply voltage range differs (4.5V ~ 5.5V versus 2.7V ~ 3.6V), requiring power supply circuit redesign. The reduced data rate (10Mbps versus 15Mbps) may also affect signal timing margins in high-frequency applications.

Q: What is the significance of the 15Mbps versus 10Mbps data rate difference? A: The PS9821-1-F3-AX supports signal transitions up to 15Mbps, while PS9817A variants are limited to 10Mbps. For applications utilizing signal frequencies above 10Mbps, only PS9821-1-F3-AX meets the performance requirement. Below 10Mbps operation, the substitutes function equivalently.

Q: Why is PS9817A-1-AX marked "Not For New Designs"? A: This designation indicates the part is in end-of-life status with manufacturer production discontinuation planned. Existing inventory remains available for sustaining existing products, but use in new designs locks future production to dwindling supply and creates long-term obsolescence risk.

Q: What packaging format should be selected for automated assembly? A: Tape & Reel (PS9821-1-F3-AX) and Cut Tape with Digi-Reel® (PS9817A-1-F3-AX) formats are compatible with pick-and-place equipment. Bulk packaging (PS9817A-1-AX) is suitable only for manual insertion or non-automated handling processes.

Q: Are all substitutes RoHS3 compliant? A: All three parts maintain ROHS3 compliance and reach unaffected status, confirming environmental regulatory alignment across the substitute group.