Toshiba Semiconductor and Storage TLP3320(TP15,F

Overview

TLP3320(TP15,F) from Toshiba Electronic Devices & Storage Corporation is a normally open photorelay in 4-pin USOP-4 package, integrating an infrared LED optically coupled to a photo MOSFET. It delivers 100 V min OFF-state voltage, 100 mA max ON-state current, and 8 Ω typ. ON-resistance, targeting high-speed ATE instrumentation requiring low capacitance (6 pF typ.) and fast switching (120 µs typ. t_ON).

For engineers reviewing the TLP3320(TP15,F) datasheet, TLP3320(TP15,F) pinout, TLP3320(TP15,F) application, or TLP3320(TP15,F) equivalent, key selection criteria include isolation voltage (1000 V_rms), trigger LED current (≤3 mA), OFF-state capacitance (≤8 pF), and thermal derating of ON-current (−1.0 mA/°C above 25°C).

Technical Context

The TLP3320(TP15,F) implements optical coupling between GaAs infrared LED and silicon photo MOSFET, enabling galvanic isolation without magnetic components. Its two-terminal internal configuration shorts pins 1–2 (LED anode/cathode) and pins 3–4 (MOSFET drain/drain), eliminating source connection and simplifying PCB layout for single-pole switching.

Designed for high-frequency test equipment, it supports 100 MHz output capacitance measurement and achieves 180 µs typ. turn-off time under 20 V supply and 200 Ω load. The device complies with UL 1577 (File E67349) and features ESD-sensitive handling requirements per Toshiba's antistatic precautions.

Key Specifications

Pinout & Package

Package: USOP-4 (Toshiba package code 11-2C1S), surface-mount, 0.03 g typical weight, 1.6 × 2.3 mm footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar photorelay applications.

Compared with TLP3320(TP15,F), TLP3555(TP,F) offers higher voltage margin and lower conduction loss but requires more PCB area and higher LED drive, while PS7141-AL-AX saves space and LED current at the cost of reduced OFF-voltage and higher R_ON, making each suitable for distinct ATE subsystem trade-offs.

Availability

TLP3320(TP15,F) is available at Aetrix Electronics and suitable for high-speed memory testers, RF measuring instruments, and automatic test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for production-grade ATE systems.

Supply support for TLP3320(TP15,F) includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and optoelectronics for industrial, automotive, and test equipment markets.

The TLP3320(TP15,F) belongs to Toshiba's photorelay product line, engineered specifically for high-speed, high-isolation signal switching in automatic test equipment where low capacitance, fast timing, and safety certification are mandatory.

FAQ

What is the maximum OFF-state voltage rating for the TLP3320(TP15,F)?

The TLP3320(TP15,F) has a minimum OFF-state output terminal voltage rating of 100 V. This value is guaranteed under specified test conditions and defines the maximum DC or peak AC voltage the device can block between output terminals while in the OFF state. Exceeding this voltage risks breakdown and permanent damage. Designers must ensure system-level transient suppression and voltage margins remain within this limit during all operating modes, including fault conditions.

Does the TLP3320(TP15,F) require external current limiting for the LED input?

Yes, the TLP3320(TP15,F) requires external current limiting on the LED side. Its absolute maximum input forward current is 50 mA, and recommended operating IF is ≤20 mA. Since the LED forward voltage is 1.15 V typ. at 10 mA, a series resistor must be calculated based on the driving supply voltage to maintain IF ≤3 mA (max trigger current) or ≤20 mA (max operating current). Failure to limit current risks LED degradation or catastrophic failure.

How is the pin configuration of the TLP3320(TP15,F) implemented internally?

The TLP3320(TP15,F) uses a two-terminal internal configuration: Pins 1 and 2 are shorted together as the LED anode/cathode pair, and Pins 3 and 4 are shorted together as the MOSFET drain terminals. This design eliminates the need for a source connection and allows bidirectional switching capability across the output. PCB layout must treat Pins 1–2 and Pins 3–4 as electrically common nodes, respectively, and avoid routing traces that assume independent pin functionality.

What safety certifications does the TLP3320(TP15,F) hold?

The TLP3320(TP15,F) is UL-recognized under UL 1577 (File No. E67349) with a minimum isolation voltage of 1000 V_rms for 60 seconds. It meets the basic insulation requirements for industrial test equipment but is not certified to IEC 60747-5-5 or reinforced insulation standards. Designers must verify system-level compliance with end-equipment safety standards (e.g., IEC 61010-1) using the TLP3320(TP15,F)'s certified parameters and creepage/clearance allowances.

Can the TLP3320(TP15,F) be used in RF signal switching above 100 MHz?

Yes, the TLP3320(TP15,F) is characterized for RF use up to 100 MHz, with OFF-state capacitance specified at 6 pF typ. and 8 pF max under 100 MHz test conditions. Its low capacitance and controlled parasitic inductance make it suitable for RF signal routing in vector network analyzers and spectrum analyzers. However, insertion loss, return loss, and isolation above 100 MHz are not characterized in the datasheet, so empirical validation is required for >100 MHz applications.