PS2801-4 Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2801-4 is a 4-channel optoisolator with transistor output rated for 2500Vrms isolation voltage. Manufactured by CEL, this component is classified as obsolete and no longer recommended for new designs. The PS2801-4 operates across a temperature range of -55°C to 100°C and is housed in a 16-SSOP surface mount package.

Due to its obsolete status, equivalent substitute parts are necessary for ongoing production support, legacy system maintenance, and design continuity. Direct replacements and functionally compatible alternatives are available from active manufacturers including Renesas Electronics Corporation and Toshiba Semiconductor and Storage.

Substiute Parts

PS2801-4

CELIn Stock: 55377PS2801-4 Datasheet

Current PartRFQ

PS2801-4-A

Renesas Electronics CorporationIn Stock: 15550PS2801-4-A Datasheet

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PS2801-4-F3-A

Renesas Electronics CorporationIn Stock: 27710PS2801-4-F3-A Datasheet

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TCMT1106

Vishay Semiconductor Opto DivisionIn Stock: 4173TCMT1106 Datasheet

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TLP291-4(GB,E)

Toshiba Semiconductor and StorageIn Stock: 1000131TLP291-4(GB,E) Datasheet

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TLP291-4(GB-TP,E)

Toshiba Semiconductor and StorageIn Stock: 3237TLP291-4(GB-TP,E) Datasheet

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TLP291-4(TP,E)

Toshiba Semiconductor and StorageIn Stock: 3369TLP291-4(TP,E) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS2801-4 are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Identical Electrical Specifications): Substitute parts must maintain the following critical parameters to qualify as direct replacements:

• Number of Channels: 4
• Voltage - Isolation: 2500Vrms
• Output Type: Transistor
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Mounting Type: Surface Mount
• Package compatibility: 16-SOIC footprint

Parts meeting these criteria: PS2801-4-A, PS2801-4-F3-A, TLP291-4(GB,E), TLP291-4(GB-TP,E), TLP291-4(TP,E)

Functionally Similar Parts (Different Channel Configuration): Parts with reduced channel count but equivalent isolation voltage and output characteristics may serve specific applications where multi-channel integration is not required.

Part meeting this criteria: TCMT1106 (single-channel variant with higher isolation voltage)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Compatibility):

PS2801-4-A and PS2801-4-F3-A are direct substitutes manufactured by Renesas Electronics Corporation. Both parts maintain identical electrical specifications to the PS2801-4 and are housed in compatible 16-SOIC packages. PS2801-4-A is supplied in Strip packaging, while PS2801-4-F3-A is available in Cut Tape (CT) & Digi-Reel® format. Both are classified as "Not For New Designs" but remain suitable for legacy system support and production continuity. Both achieve ROHS3 compliance, representing an improvement over the non-compliant PS2801-4.

TLP291-4(GB,E), TLP291-4(GB-TP,E), and TLP291-4(TP,E) are manufactured by Toshiba Semiconductor and Storage and maintain the same 4-channel configuration, 2500Vrms isolation voltage, and 80V maximum output voltage as the PS2801-4. These parts are classified as Active products, ensuring long-term availability and support. All three variants are ROHS3 compliant. The TLP291-4 series exhibits faster switching characteristics (3µs turn-on/off time versus 6µs/5µs for the PS2801-4) and lower rise/fall times (2µs/3µs versus 3µs/5µs). Package dimensions differ slightly (0.179" versus 0.173" width), requiring PCB layout verification. Packaging options include Tube (GB,E), Cut Tape with Digi-Reel (GB-TP,E), and Cut Tape (TP,E).

For Applications Requiring Single-Channel Isolation:

TCMT1106 manufactured by Vishay Semiconductor Opto Division provides higher isolation voltage (3750Vrms) in a single-channel configuration. This part is suitable only for applications where multi-channel integration is not required. The TCMT1106 is classified as Active and ROHS3 compliant. Operating temperature range is -40°C to 100°C, which does not extend to -55°C minimum. Maximum output voltage is 70V, which is 10V lower than the PS2801-4. This part is not recommended as a direct substitute for multi-channel applications.

Frequently Asked Questions (FAQ)

Q: Can PS2801-4-A be used as a direct replacement for PS2801-4 in existing designs?

A: Yes. PS2801-4-A maintains identical electrical specifications including 4-channel configuration, 2500Vrms isolation voltage, 80V maximum output voltage, 50mA per-channel current rating, and 300mV maximum Vce saturation. Both parts use compatible 16-SOIC packages with identical 0.173" width. PCB layout modifications are not required.

Q: What is the difference between PS2801-4-F3-A and PS2801-4-A?

A: Both parts are electrically identical. The difference is packaging format. PS2801-4-A is supplied in Strip packaging, while PS2801-4-F3-A is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly line requirements and component handling procedures.

Q: Are TLP291-4 variants pin-compatible with PS2801-4?

A: Yes. All TLP291-4 variants (GB,E), (GB-TP,E), and (TP,E) maintain the same 16-pin configuration and pinout as the PS2801-4. However, package width differs slightly (0.179" versus 0.173"), which may require PCB layout verification for high-density designs with tight component spacing.

Q: What are the advantages of TLP291-4 over PS2801-4?

A: TLP291-4 parts offer three advantages: (1) Active product status ensures long-term availability and manufacturer support, (2) Faster switching characteristics with 3µs turn-on/off time and 2µs/3µs rise/fall times compared to PS2801-4's 6µs/5µs and 3µs/5µs respectively, and (3) Extended operating temperature range to 110°C versus 100°C for PS2801-4.

Q: Can TCMT1106 replace PS2801-4 in multi-channel applications?

A: No. TCMT1106 is a single-channel device and cannot replace the 4-channel PS2801-4 in applications requiring simultaneous isolation of multiple signal paths. TCMT1106 is suitable only for applications requiring single-channel isolation with higher voltage rating (3750Vrms).

Q: What is the impact of different Current Transfer Ratio specifications?

A: Current Transfer Ratio (CTR) determines the output current relative to input current. PS2801-4 specifies 80-600% CTR, while TLP291-4 specifies 50-400% CTR (or 100-400% for GB and GB-TP variants). Lower CTR minimum (50% for TLP291-4 TP,E) may require circuit design adjustment for input current levels. Higher CTR maximum (600% for PS2801-4) provides greater output current margin. Circuit validation is necessary when substituting between parts with different CTR ranges.

Q: Are all substitute parts RoHS compliant?

A: PS2801-4 is RoHS non-compliant. All substitute parts (PS2801-4-A, PS2801-4-F3-A, TLP291-4 variants, and TCMT1106) are ROHS3 compliant, meeting current environmental regulations for new production and export to regulated markets.

Q: What is the difference between TLP291-4(GB,E), TLP291-4(GB-TP,E), and TLP291-4(TP,E)?

A: All three variants are electrically identical 4-channel optoisolators with 2500Vrms isolation. Differences are packaging and Current Transfer Ratio minimum specification. TLP291-4(GB,E) is supplied in Tube packaging with 100% CTR minimum. TLP291-4(GB-TP,E) is supplied in Cut Tape with Digi-Reel® format with 100% CTR minimum. TLP291-4(TP,E) is supplied in Cut Tape format with 50% CTR minimum. Selection depends on assembly line equipment compatibility and circuit design requirements for minimum CTR performance.