TLP358F(D4-LF4,F) Equivalent & Substitute Parts

Part Overview

The TLP358F(D4-LF4,F) is a logic output optoisolator with push-pull, totem pole configuration manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation rated at 3750Vrms with a single channel and high common mode transient immunity of 20kV/µs. The device is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

TLP358F(D4-LF4,F)

Toshiba Semiconductor and StorageIn Stock: 907TLP358F(D4-LF4,F) Datasheet

Current PartRFQ

TLP5754(D4-LF4,E

Toshiba Semiconductor and StorageIn Stock: 1022TLP5754(D4-LF4,E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP358F(D4-LF4,F) is determined by the following critical parameters:

Isolation Voltage: The TLP358F provides 3750Vrms isolation. Substitute parts must maintain isolation voltage at or above this specification to preserve circuit safety margins and regulatory compliance.

Channel Configuration: Single-channel operation is required. Substitute parts must provide exactly one isolated channel to match the original design topology.

Output Configuration: Push-pull, totem pole output topology is essential for the intended application. Substitute parts must provide equivalent output stage architecture.

Common Mode Transient Immunity: Minimum 20kV/µs CMTI is specified. Substitute parts meeting or exceeding this parameter ensure reliable operation during high-speed transient events.

Supply Voltage Range: Operation within 15V to 30V supply range is mandatory for system compatibility.

Operating Temperature Range: The -40°C to 100°C range defines the thermal operating envelope. Substitute parts must support this range or an extended range.

Surface Mount Packaging: The original device uses 8-SMD surface mount configuration. Substitute parts must be compatible with surface mount assembly processes.

The TLP5754(D4-LF4,E) qualifies as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The TLP5754(D4-LF4,E) is the manufacturer-recommended substitute for the obsolete TLP358F(D4-LF4,F). This substitution is supported by the following factors:

Product Status: The TLP5754 maintains active product status, ensuring continued availability and manufacturing support from Toshiba Semiconductor and Storage.

Regulatory Compliance: The TLP5754 carries multiple approval agencies including CQC, CSA, cUL, UL, and VDE, providing comprehensive compliance documentation for industrial and safety-critical applications.

Electrical Performance: The substitute part exceeds the isolation voltage requirement (5000Vrms versus 3750Vrms) and common mode transient immunity specification (35kV/µs versus 20kV/µs), providing enhanced noise immunity and safety margins.

Timing Characteristics: Propagation delay and rise/fall times are improved in the substitute part, enabling faster signal switching and reduced timing uncertainty.

Supply Compatibility: Both parts operate within the identical 15V to 30V supply voltage range, eliminating power supply redesign requirements.

Temperature Range: The TLP5754 extends the upper operating temperature limit to 110°C, accommodating applications with elevated thermal environments.

Package Consideration: The TLP5754 uses a 6-SOIC package (0.295", 7.50mm Width) versus the original 8-SMD package. PCB layout modification is required for this substitution.

Output Current Limitation: The TLP5754 provides 4A peak output current compared to the original 6A specification. Applications requiring the full 6A output capability must evaluate alternative substitutes or confirm that 4A output current is sufficient for the intended load.

Frequently Asked Questions (FAQ)

Q: Can the TLP5754(D4-LF4,E) directly replace the TLP358F(D4-LF4,F) without PCB modifications?

A: No. The TLP358F uses an 8-SMD, Gull Wing package while the TLP5754 uses a 6-SOIC package. PCB footprint redesign is required. The pin assignments and electrical interface differ between these package types.

Q: What is the impact of the reduced output current specification in the TLP5754?

A: The TLP5754 provides 4A peak output current versus the original 6A specification. Applications must verify that the load impedance and switching requirements are compatible with 4A output capability. If 6A output current is mandatory, alternative substitutes must be evaluated.

Q: Does the higher isolation voltage of the TLP5754 create any compatibility issues?

A: No. Higher isolation voltage provides additional safety margin and is fully backward compatible. The 5000Vrms rating of the TLP5754 exceeds the 3750Vrms requirement of the original part, improving circuit robustness without introducing incompatibilities.

Q: Are there any certifications or approvals that differ between these parts?

A: The TLP5754 carries certifications from CQC, CSA, cUL, UL, and VDE. Verify that these certifications align with your application's regulatory requirements. The original TLP358F certifications are not provided in the technical data.

Q: What is the significance of the improved propagation delay in the TLP5754?

A: The TLP5754 reduces propagation delay from 500ns to 150ns, resulting in faster signal transmission through the optoisolator. This improvement reduces timing uncertainty and may enable operation at higher switching frequencies. Verify that existing timing margins in your circuit accommodate this faster response.

Q: Is the TLP5754 suitable for gate driver applications?

A: Yes. The TLP5754 is specified as a gate driver optical coupling device. It is designed for driving power semiconductor gates in switching applications. The original TLP358F is a logic output optoisolator. Confirm that gate driver functionality meets your application requirements.

Q: What is the Moisture Sensitivity Level (MSL) of the TLP5754?

A: The TLP5754 has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. This simplifies storage, handling, and assembly processes compared to higher MSL ratings.