Toshiba Semiconductor and Storage TLP2312(V4,E

Overview

TLP2312(V4,E) from Toshiba Electronic Devices & Storage Corporation is a high-speed photocoupler combining an infrared LED and monolithic photo IC in a 6-pin SOIC package, delivering 5 Mbps data transfer rate, ±20 kV/µs common-mode transient immunity, and operation down to 2.2 V supply - enabling direct microcontroller interfacing in industrial PLC and inverter control systems.

For engineers reviewing the TLP2312(V4,E) datasheet, TLP2312(V4,E) pinout, TLP2312(V4,E) application, or TLP2312(V4,E) equivalent, key selection criteria include low-threshold input current (1.6 mA max), ultra-low supply current (0.5 mA max), guaranteed isolation voltage (3750 Vrms), and VDE-compliant EN IEC 60747-5-5 certification for reinforced insulation in safety-critical industrial designs.

Technical Context

The TLP2312(V4,E) integrates a GaAs infrared LED emitter with a silicon photodetector IC featuring a totem-pole output stage capable of both sourcing and sinking current. Its internal Faraday shield ensures robust noise rejection in electrically noisy environments such as motor drives and factory automation equipment.

It operates across -40°C to +125°C with supply voltage ranging from 2.2 V to 5.5 V, supporting LVCMOS-compatible logic levels without external level-shifting. Pulse width distortion is limited to 20 ns (max), and propagation delay skew between units is ≤45 ns - critical for deterministic timing in synchronized digital isolation applications.

Key Specifications

Pinout & Package

Package: SO6 (TOSHIBA designation 11-4L1S), surface-mount, 6-pin small-outline integrated circuit with creepage/clearance ≥5.0 mm and internal isolation thickness ≥0.4 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed digital isolation applications.

Compared with ACPL-M61T-500E and SI8660BB-B-IS1R, the TLP2312(V4,E) uniquely combines VDE-reinforced insulation certification, 125°C operation, and 2.2 V minimum supply - making it the only option qualified for safety-rated, wide-temperature, low-voltage industrial PLC and inverter designs requiring long-term reliability.

Availability

TLP2312(V4,E) is available at Aetrix Electronics and suitable for Programmable Logic Controllers (PLCs), Industrial Inverters, and High-Speed Digital Interfacing for Instrumentation and Control Devices requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for TLP2312(V4,E) 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 optoelectronic components with focus on industrial reliability and safety compliance.

The TLP2312 product line delivers high-speed, low-power photocouplers optimized for functional safety in industrial automation, motor control, and programmable controller applications - emphasizing VDE/UL-certified reinforced insulation and extended temperature operation.

FAQ

What safety certifications does the TLP2312(V4,E) hold?

The TLP2312(V4,E) is UL-recognized (UL 1577, File No. E67349), cUL-recognized (CSA 5A File No. E67349), VDE-approved per EN IEC 60747-5-5 and EN IEC 62368-1, and CQC-approved per GB4943.1. The "(V4)" suffix specifically denotes qualification to Option V4 of EN IEC 60747-5-5 for reinforced insulation - a requirement for many industrial safety architectures. These certifications are verified in Toshiba's official documentation and apply directly to the TLP2312(V4,E) part number.

Can the TLP2312(V4,E) operate from a 2.5 V supply?

Yes, the TLP2312(V4,E) operates from 2.2 V to 5.5 V, making it fully compatible with 2.5 V LVCMOS logic systems. Its low 1.6 mA maximum threshold input current and 0.5 mA maximum supply current allow direct connection to microcontroller GPIOs without level shifters or current buffers. This capability is confirmed in Toshiba's Recommended Operating Conditions table and validated across the full -40°C to +125°C temperature range for the TLP2312(V4,E).

Why is a 0.1 µF capacitor required between Pin 6 (VDD) and Pin 4 (GND) for the TLP2312(V4,E)?

A 0.1 µF ceramic bypass capacitor is mandatory between Pin 6 (VDD) and Pin 4 (GND) for stable operation of the TLP2312(V4,E) detector IC. Without it, high-gain internal amplification can cause oscillation or erratic switching, especially at high data rates. Toshiba specifies placement within 1 cm of the pins and cites this requirement in both the "Internal Circuit" and "Recommended Operating Conditions" sections of the TLP2312(V4,E) datasheet - failure to implement it risks non-functional behavior in production systems.

What is the meaning of the "(V4,E)" suffix in TLP2312(V4,E)?

In TLP2312(V4,E), "V4" indicates qualification to Option V4 of EN IEC 60747-5-5 - a VDE safety standard for reinforced insulation in optocouplers - while "E" denotes RoHS-compliant packaging (lead-free, halogen-free). This suffix is not cosmetic: it identifies a specific manufacturing lot and test flow that validates the TLP2312(V4,E) for safety-critical applications where regulatory compliance is mandatory, such as industrial machinery control per ISO 13849-1. The base TLP2312 without V4 is not certified to this standard.

Does the TLP2312(V4,E) support bidirectional signal transmission?

No, the TLP2312(V4,E) is a unidirectional digital isolator: it transmits signals only from the input LED side (Pins 1 and 3) to the output photo IC side (Pins 4, 5, and 6). Its truth table confirms output state follows input LED state (H→H, L→L), with no reverse path. For bidirectional isolation, separate TLP2312(V4,E) units or alternative devices like dual-channel isolators would be required - a limitation explicitly defined in Toshiba's "Principle of Operation" section for the TLP2312(V4,E).