PS9851-1-AX Equivalent & Substitute Parts

Part Overview

The PS9851-1-AX is a logic output optoisolator manufactured by CEL, designed for high-speed digital isolation applications requiring 2500Vrms isolation voltage. This component features push-pull totem pole output configuration with 15Mbps data rate capability and 10kV/µs common mode transient immunity. The PS9851-1-AX is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

PS9851-1-AX

CELIn Stock: 884PS9851-1-AX Datasheet

Current PartRFQ

PS9851-1-F3-AX

Renesas Electronics CorporationIn Stock: 2511PS9851-1-F3-AX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS9851-1-AX is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Isolation voltage: 2500Vrms (exact match required)
• Number of channels: 1 (single channel configuration)
• Output configuration: Push-Pull, Totem Pole (identical output stage topology)
• Data rate: 15Mbps (minimum performance threshold)
• Common mode transient immunity: 10kV/µs (minimum CMTI specification)
• Propagation delay: 60ns maximum for both tpLH and tpHL
• Supply voltage: 4.5V ~ 5.5V (compatible operating range)
• Operating temperature: -40°C ~ 100°C (identical range)

Mechanical Equivalence Criteria:

• Package: 8-SSOP (identical footprint and pin configuration)
• Mounting: Surface Mount (compatible assembly process)

Compliance Equivalence Criteria:

• RoHS3 Compliant status
• REACH Unaffected status
• Moisture Sensitivity Level 1 (Unlimited)

The PS9851-1-F3-AX meets all substitution criteria as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The PS9851-1-F3-AX manufactured by Renesas Electronics Corporation is a direct functional equivalent to the discontinued PS9851-1-AX. Both components share identical electrical specifications, mechanical packaging, and compliance certifications.

Selection Basis:

The PS9851-1-F3-AX is recommended for new designs and replacement applications because:

1. Product Status: The PS9851-1-F3-AX maintains active product status with Renesas Electronics, ensuring continued availability and manufacturing support. The original PS9851-1-AX is discontinued at DiGi Electronics.

2. Electrical Equivalence: All critical performance parameters are identical, including isolation voltage (2500Vrms), data rate (15Mbps), common mode transient immunity (10kV/µs), propagation delay (60ns), and supply voltage range (4.5V ~ 5.5V).

3. Mechanical Compatibility: Both components use identical 8-SSOP surface mount packaging with matching footprints and pin configurations, enabling direct PCB layout compatibility.

4. Compliance Alignment: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating, satisfying equivalent regulatory and environmental requirements.

5. Packaging Availability: The PS9851-1-F3-AX is available in Tape & Reel (TR) packaging format with 2406 pieces in current inventory, supporting production volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the PS9851-1-F3-AX be used as a direct replacement for the PS9851-1-AX in existing designs?

A: Yes. The PS9851-1-F3-AX is a direct functional equivalent with identical electrical specifications, mechanical packaging, and pin configuration. No circuit modifications or PCB layout changes are required for substitution.

Q: Are there any differences in isolation voltage between these parts?

A: No. Both the PS9851-1-AX and PS9851-1-F3-AX provide 2500Vrms isolation voltage with identical common mode transient immunity of 10kV/µs.

Q: Do both parts support the same data rate?

A: Yes. Both components support 15Mbps data rate with identical propagation delay specifications of 60ns maximum for both rising and falling edge transitions.

Q: What is the difference in packaging between these parts?

A: Both parts use 8-SSOP surface mount packaging with identical physical dimensions (8-SOIC, 0.154" width, 3.90mm). The PS9851-1-F3-AX is supplied in Tape & Reel format, while the PS9851-1-AX packaging format is not specified in the provided data.

Q: Are there any compliance or regulatory differences?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating. Both are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Q: What is the operating temperature range for both parts?

A: Both the PS9851-1-AX and PS9851-1-F3-AX operate across the identical temperature range of -40°C to 100°C.

Q: Can these parts be used interchangeably in high-speed digital isolation circuits?

A: Yes. With matching 15Mbps data rate capability, 60ns propagation delay, and 4ns rise/fall times, both parts are functionally interchangeable in high-speed digital isolation applications requiring 2500Vrms isolation.

Q: Is the PS9851-1-F3-AX currently available for purchase?

A: Yes. The PS9851-1-F3-AX maintains active product status with 2406 pieces in current inventory, providing reliable supply for new designs and production requirements.