PS9814-1-F4-A Optoisolator Equivalents & Substitute Parts

Part Overview

The PS9814-1-F4-A is a logic output optoisolator manufactured by CEL, featuring 2500Vrms isolation with open collector output configuration and 10Mbps data rate capability. This component is classified as obsolete, making identification of compatible substitutes necessary for continued system support and new procurement requirements. The part operates across a -40°C to 85°C temperature range and is designed for applications requiring galvanic isolation with high common mode transient immunity.

Substiute Parts

PS9814-1-F4-A

CELIn Stock: 1137PS9814-1-F4-A Datasheet

Current PartRFQ

PS9817A-1-AX

Renesas Electronics CorporationIn Stock: 1283PS9817A-1-AX Datasheet

DirectRFQ

PS9817A-1-F3-AX

Renesas Electronics CorporationIn Stock: 32294PS9817A-1-F3-AX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS9814-1-F4-A is determined by strict alignment across the following critical parameters:

• Isolation Voltage: Minimum 2500Vrms (matching specification)
• Output Configuration: Open Collector topology
• Number of Channels: Single channel (1 channel)
• Data Rate: 10Mbps or greater
• Output Current: 25 mA per channel
• Supply Voltage Range: 4.5V ~ 5.5V
• Temperature Range: -40°C ~ 85°C
• Package Type: 8-SOIC (0.154", 3.90mm Width) surface mount

Both identified substitutes (PS9817A-1-AX and PS9817A-1-F3-AX) meet these core electrical and mechanical requirements. The PS9817A variants are manufactured by Renesas Electronics Corporation and maintain functional equivalence while offering improved common mode transient immunity (15kV/µs vs. 10kV/µs).

Parameter Comparison

Engineering Selection Recommendations

The PS9817A-1-F3-AX is the primary substitute for the obsolete PS9814-1-F4-A. This part maintains full electrical and mechanical compatibility while offering active product status and ROHS3 compliance. With 32,200 pieces in current inventory, PS9817A-1-F3-AX provides superior supply continuity and is recommended for new procurement and board redesigns.

The PS9817A-1-AX serves as an alternative substitute with identical electrical specifications and packaging. However, its "Not For New Designs" product status limits applicability to legacy system support only. Bulk packaging makes this variant suitable for high-volume replacement scenarios in existing fielded systems.

Both substitutes demonstrate improved common mode transient immunity (15kV/µs) compared to the original part (10kV/µs), providing enhanced robustness in electrically noisy environments. The faster fall time specification (5ns vs. 10ns) of the PS9817A variants represents a minor performance enhancement in edge transition characteristics.

REACH compliance differs between the original part (REACH Affected) and both substitutes (REACH Unaffected), representing a regulatory advantage for European applications and global supply chains.

Frequently Asked Questions (FAQ)

Q: Can PS9817A-1-F3-AX directly replace PS9814-1-F4-A without PCB modifications?

A: Yes. Both parts use identical 8-SOIC packaging (0.154", 3.90mm Width) with the same pin configuration for surface mount assembly. No PCB layout changes are required.

Q: What is the primary difference between PS9817A-1-AX and PS9817A-1-F3-AX?

A: The packaging and product status differ. PS9817A-1-AX ships in bulk packaging with "Not For New Designs" status. PS9817A-1-F3-AX uses Cut Tape and Digi-Reel packaging formats with active product status. Both offer identical electrical performance.

Q: Does the improved CMTI specification of the PS9817A variants affect compatibility?

A: No. Higher common mode transient immunity (15kV/µs vs. 10kV/µs) is a superset of the original requirement and presents no compatibility issues. This enhancement provides better performance in systems with rapid voltage transitions.

Q: Are there supply chain advantages to using PS9817A-1-F3-AX?

A: Yes. With 32,200 pieces in inventory and active product status, PS9817A-1-F3-AX offers superior supply continuity compared to the obsolete PS9814-1-F4-A and the "Not For New Designs" PS9817A-1-AX variant.

Q: What compliance difference exists between the original and substitute parts?

A: The original PS9814-1-F4-A carries REACH Affected status. Both PS9817A substitutes are REACH Unaffected, simplifying regulatory compliance for systems destined for European markets.

Q: Is the 5ns fall time of PS9817A variants critical for system timing?

A: The fall time difference (5ns vs. 10ns) represents a minor improvement in edge transition speed. For applications using 10Mbps data rates, this specification change is not a limiting factor. Systems using the original 10ns specification will operate correctly with the improved 5ns performance.