Toshiba Semiconductor and Storage TLP2468(F)

Overview

TLP2468(F) from Toshiba is a high-speed, logic-output photocoupler integrating a GaAlAs infrared LED and a photo IC with open-collector output. It operates across 2.7–5.5 V supply, supports −40°C to +125°C ambient, delivers 20 MBd (NRZ) data rate, and provides 3750 Vrms isolation - used for noise-immune digital signal transmission in industrial control interfaces.

For engineers reviewing the TLP2468(F) datasheet, TLP2468(F) pinout, TLP2468(F) application, or TLP2468(F) equivalent, key selection criteria include common-mode transient immunity (±15 kV/µs), threshold input current (≤5.0 mA), SO8 package compatibility, and compliance with UL1577, CSA, and EN60747-5-5 (with V4 option).

Technical Context

The TLP2468(F) implements an optically isolated inverter logic function: LED turn-on drives the photoreceptor to pull VO low (open-collector sink), while LED off results in VO high via external pull-up. Its internal noise shield enables ±15 kV/µs common-mode rejection, critical for noisy factory automation environments.

It features a two-terminal isolation structure (pins 1–4 tied internally; pins 5–8 tied), rated for 3750 Vrms isolation, with guaranteed operation up to 125°C and propagation delays ≤60 ns (tpHL/tpLH) under RL = 350 Ω, CL = 15 pF conditions.

Key Specifications

Pinout & Package

Package: SO8 (TOSHIBA designation 11-5K1S), surface-mount, 1.27 mm pitch, 0.11 g typical weight. Pin 1–4 form the input side (LED anode/cathode + N.C.), pins 5–8 form the output side (GND, VO, N.C., VCC).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar logic-output photocoupler applications.

Compared with TLP2468(F), TLP2368(F) trades speed and noise immunity for cost, while ACPL-K34T extends bandwidth at the expense of supply voltage flexibility - making TLP2468(F) optimal for mixed-voltage, noise-prone industrial designs requiring balanced performance.

Availability

TLP2468(F) is available at Aetrix Electronics and suitable for plasma display panels, factory automation I/O modules, and precision measuring instruments requiring stable component supply, long-term lifecycle support, and certified isolation performance.

Supply support for TLP2468(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 consumer applications.

The TLP2468(F) belongs to Toshiba's high-speed logic-output photocoupler product line, engineered specifically for noise-immune digital signal transmission in factory automation, test equipment, and display systems.

FAQ

What is the maximum data rate supported by the TLP2468(F)?

The TLP2468(F) supports a typical data transfer rate of 20 MBd in NRZ format. This value is measured under standard conditions (IF = 0 ↔ 7.5 mA, RL = 350 Ω, CL = 15 pF, Ta = 25°C). The device maintains reliable switching up to this rate across its full operating temperature range (−40°C to +125°C), making it suitable for high-speed serial interfaces in industrial controllers and display drivers. TLP2468(F) achieves this performance using a high-gain, high-speed photoreceptor chip coupled with a GaAlAs LED.

Does the TLP2468(F) require an external bypass capacitor?

Yes, a 0.1 µF ceramic capacitor must be placed between pin 8 (VCC) and pin 5 (GND) of the TLP2468(F) to stabilize the internal photoreceptor amplifier. Without this capacitor, the TLP2468(F) may exhibit erratic switching behavior or failure to transition reliably due to supply noise coupling into the high-gain detection circuit. The capacitor must be located within 1 cm of the pins to minimize parasitic inductance, as specified in the Toshiba datasheet Rev.6.0.

What safety certifications apply to the TLP2468(F)?

The TLP2468(F) is UL1577 approved (File No. E67349), cUL-approved per CSA Component Acceptance Service No. 5A (File No. E67349), and compliant with EN60747-5-5 when ordered with Option V4. These certifications verify its dielectric strength, construction, and reliability for use in safety-critical industrial equipment. Standard TLP2468(F) units meet UL and CSA requirements; EN60747-5-5 compliance requires explicit ordering of the V4 variant, which modifies internal insulation structure.

Can the TLP2468(F) operate from a 3.3 V supply?

Yes, the TLP2468(F) operates over a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3 V logic systems. At VCC = 3.3 V, the device maintains its specified 20 MBd data rate, ≤60 ns propagation delay, and ±15 kV/µs common-mode transient immunity. Its low 5.0 mA maximum threshold input current ensures compatibility with standard 3.3 V MCU GPIOs, eliminating the need for additional driver stages when interfacing with modern embedded controllers.

What is the meaning of "N.C." on pins 1, 4, and 7 of the TLP2468(F)?

Pins 1, 4, and 7 of the TLP2468(F) are designated "No-connect" - they are electrically isolated from both input and output circuits and must remain unconnected in PCB layout. Internally, pins 1–4 are shorted together as part of the input-side terminal group, and pins 5–8 are shorted as the output-side group; connecting pins 1, 4, or 7 would compromise creepage distance, clearance, and isolation integrity. The TLP2468(F) datasheet explicitly prohibits routing traces to these pins to maintain 4.0 mm minimum creepage and clearance.