TLP718(TP,F) Equivalent & Substitute Parts

Part Overview

The TLP718(TP,F) is a logic output optoisolator manufactured by Toshiba Semiconductor and Storage, designed for applications requiring galvanic isolation with push-pull, totem pole output configuration. This component operates at 5000Vrms isolation voltage with a maximum common mode transient immunity (CMTI) of 10kV/µs and supports data rates up to 5Mbps. The TLP718(TP,F) is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support, maintenance, and new production requirements.

Substiute Parts

TLP718(TP,F)

Toshiba Semiconductor and StorageIn Stock: 2038TLP718(TP,F) Datasheet

Current PartRFQ

TLP2748(TP,E

Toshiba Semiconductor and StorageIn Stock: 7141TLP2748(TP,E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP718(TP,F) is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Isolation voltage: 5000Vrms (matches substitute requirement)
• Output configuration: Push-Pull, Totem Pole (matches substitute requirement)
• Number of channels: 1 (matches substitute requirement)
• Input type: DC (matches substitute requirement)
• Mounting type: Surface Mount (matches substitute requirement)
• Manufacturer: Toshiba Semiconductor and Storage (same manufacturer ensures design continuity)

Performance Parameters Allowing Substitution:

• Common Mode Transient Immunity: The substitute TLP2748(TP,E) provides 30kV/µs, which exceeds the minimum 10kV/µs requirement of the TLP718(TP,F)
• Propagation delay: The substitute provides improved performance (120ns vs. 250ns maximum)
• Output current: The substitute provides 50 mA per channel, exceeding the 25 mA requirement
• Supply voltage range: The substitute supports 4.5V ~ 30V, which encompasses the original 4.5V ~ 20V range
• Operating temperature: The substitute supports -40°C ~ 110°C, extending the upper limit from 100°C

The TLP2748(TP,E) qualifies as a direct substitute because it maintains all mandatory electrical and mechanical parameters while providing enhanced performance characteristics across secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TLP2748(TP,E)

The TLP2748(TP,E) is the qualified substitute for the obsolete TLP718(TP,F). Selection of this substitute is based on the following engineering factors:

Product Status and Availability: The TLP2748(TP,E) maintains active product status with 7060 pieces in current inventory, ensuring long-term availability and supply chain continuity. The TLP718(TP,F) is classified as obsolete, making the TLP2748(TP,E) the appropriate choice for new designs and ongoing production support.

Compliance and Certifications: The TLP2748(TP,E) is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both components share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications. The TLP2748(TP,E) carries Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating superior moisture handling characteristics.

Electrical Equivalence: All mandatory electrical parameters are maintained or exceeded. The substitute provides identical isolation voltage (5000Vrms), output configuration (push-pull, totem pole), and channel count (1). Enhanced performance is delivered through superior CMTI (30kV/µs vs. 10kV/µs), increased output current capability (50 mA vs. 25 mA), and faster propagation delay (120ns vs. 250ns).

Package Compatibility: Both components utilize 6-SOIC surface mount packages. The TLP2748(TP,E) package width is 7.50mm compared to 6.80mm for the TLP718(TP,F). This minor dimensional variation requires PCB layout verification to ensure clearance and thermal management compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the TLP2748(TP,E) be used as a direct replacement for the TLP718(TP,F) in existing designs?

A: The TLP2748(TP,E) is electrically compatible with the TLP718(TP,F) across all mandatory parameters. However, the package width difference (7.50mm vs. 6.80mm) requires verification of PCB layout clearances. Pin configuration and functional behavior are identical, allowing functional substitution upon confirmation of physical fit.

Q: What are the key differences between these two optoisolators?

A: The primary differences are product status (active vs. obsolete) and enhanced performance specifications in the substitute. The TLP2748(TP,E) provides superior common mode transient immunity (30kV/µs vs. 10kV/µs), faster propagation delay (120ns vs. 250ns), faster rise/fall times (3ns vs. 30ns), and higher output current capability (50 mA vs. 25 mA). The substitute also supports an extended supply voltage range (4.5V ~ 30V vs. 4.5V ~ 20V) and higher operating temperature limit (110°C vs. 100°C).

Q: Are there any input current differences that affect circuit design?

A: The TLP2748(TP,E) requires a maximum DC forward current of 15mA compared to 20mA for the TLP718(TP,F). This lower input current requirement reduces input drive circuit power dissipation. The forward voltage is also slightly lower (1.55V vs. 1.6V), resulting in improved input efficiency.

Q: What is the significance of the package width difference?

A: The TLP2748(TP,E) has a package width of 7.50mm compared to 6.80mm for the TLP718(TP,F). Both components use 6-SOIC surface mount packages. This 0.70mm difference requires PCB layout review to ensure adequate clearance from adjacent components and traces. Thermal management and solder reflow profiles remain compatible.

Q: Is the TLP2748(TP,E) suitable for new product designs?

A: Yes. The TLP2748(TP,E) is classified as active product status with current manufacturing and inventory support. The component meets RoHS3 compliance and REACH requirements, making it appropriate for new designs requiring long-term supply chain stability and regulatory compliance.

Q: How do the isolation voltage ratings compare?

A: Both components provide identical 5000Vrms isolation voltage, meeting the same galvanic isolation requirements. This parameter is not a differentiator between the two components.

Q: What is the impact of the improved CMTI specification?

A: The TLP2748(TP,E) provides 30kV/µs common mode transient immunity compared to 10kV/µs for the TLP718(TP,F). This enhanced specification indicates superior performance in high-speed switching environments and applications with steep voltage transients. Designs utilizing the TLP718(TP,F) will experience improved noise immunity with the substitute component.