PS9851-2-AX Equivalent & Substitute Parts

Part Overview

The PS9851-2-AX is a logic output optoisolator manufactured by Renesas Electronics Corporation, designed for high-speed isolation applications requiring 2500Vrms isolation voltage with push-pull totem pole output configuration. This 2-channel device is part of the NEPOC series and delivers 15Mbps data rate performance across the specified operating temperature range of -40°C to 100°C.

The PS9851-2-AX carries a "Discontinued at DiGi Electronics" product status at the primary manufacturer level. The availability of equivalent substitute parts from the same manufacturer ensures continued access to components meeting identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

PS9851-2-AX

CELIn Stock: 993PS9851-2-AX Datasheet

Current PartRFQ

PS9851-2-AX

Renesas Electronics CorporationIn Stock: 818PS9851-2-AX Datasheet

DirectRFQ

PS9851-2-F3-AX

Renesas Electronics CorporationIn Stock: 8956PS9851-2-F3-AX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PS9851-2-AX optoisolator is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 2500Vrms
• Number of Channels: 2
• Output Type: Push-Pull, Totem Pole configuration
• Common Mode Transient Immunity: 10kV/µs minimum
• Data Rate: 15Mbps
• Propagation Delay: 60ns maximum (both rise and fall paths)
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to 100°C
• Package Type: 8-SOIC surface mount package
• Compliance: ROHS3 compliant

The substitute parts listed below maintain all electrical characteristics and mechanical dimensions required for direct functional replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

PS9851-2-AX (Renesas, Bulk Packaging): This part maintains identical electrical specifications to the original PS9851-2-AX but carries a "Not For New Designs" product status. This designation indicates the component remains available but is targeted for legacy system support and maintenance applications only. Selection of this variant is appropriate when existing inventory requirements or legacy product support mandates use of components originally specified in discontinued product lines.

PS9851-2-F3-AX (Renesas, Tape & Reel Packaging): This variant carries an "Active" product status from Renesas Electronics Corporation, designating it as the current mainstream offering for the PS9851 optoisolator family. The PS9851-2-F3-AX is the recommended selection for new design implementations, volume production, and ongoing supply chain management. Tape & Reel packaging provides manufacturing efficiency advantages for automated assembly processes. This part maintains full electrical and mechanical compatibility with the original PS9851-2-AX specification.

Both substitute parts satisfy ROHS3 compliance requirements and identical isolation voltage, CMTI, data rate, and thermal operating specifications necessary for drop-in replacement functionality.

Frequently Asked Questions (FAQ)

Q: Can PS9851-2-F3-AX replace PS9851-2-AX in existing designs?

A: Yes. The PS9851-2-F3-AX provides complete electrical and mechanical equivalence to PS9851-2-AX across all specified parameters including isolation voltage, channel count, output type, data rate, propagation delay, supply voltage range, operating temperature range, and package dimensions. The difference in packaging format (Tape & Reel versus bulk) does not affect circuit functionality.

Q: What is the difference between the two substitute parts?

A: Both PS9851-2-AX (Bulk) and PS9851-2-F3-AX (Tape & Reel) from Renesas Electronics Corporation are electrically identical. The primary distinctions are product status and packaging format. PS9851-2-F3-AX carries "Active" status and Tape & Reel packaging suitable for high-volume manufacturing. PS9851-2-AX in bulk packaging carries "Not For New Designs" status. For new production, PS9851-2-F3-AX is the preferred selection.

Q: Are there any pin configuration or footprint differences between these parts?

A: No. All three part variants maintain identical 8-SOIC package dimensions (0.154" width, 3.90mm standard package case). Pin configuration and PCB footprint requirements are identical across PS9851-2-AX and PS9851-2-F3-AX.

Q: What compliance certifications apply to these optoisolators?

A: All parts listed maintain ROHS3 compliance and identical REACH status (unaffected). Moisture Sensitivity Level (MSL) is rated at 1 (Unlimited) across all variants, indicating no special storage or handling precautions required.

Q: How does Common Mode Transient Immunity affect circuit design?

A: The 10kV/µs CMTI specification defines the maximum rate of voltage change across the isolation barrier that the device can tolerate without triggering output errors. This parameter is critical in high-noise industrial environments and high-frequency switching applications. All substitute parts maintain identical 10kV/µs CMTI performance.

Q: What does "Tape & Reel" packaging mean for manufacturing?

A: Tape & Reel packaging delivers components on a continuous plastic tape with regularly-spaced pockets, optimized for automated pick-and-place assembly equipment. This format reduces manual handling and improves manufacturing throughput compared to bulk packaging. Both packaging formats contain identical components with identical performance specifications.