Toshiba Semiconductor and Storage TC7WH125FK,LJ(CT

Overview

TC7WH125FK,LJ(CT) from Toshiba Electronic Devices & Storage Corporation is a dual-channel 3-state bus buffer IC designed for bidirectional data isolation in high-speed digital systems. It features dual independent buffers (A→Y and B→Z), 3.8 ns typical propagation delay at 5.0 V/15 pF, 2.0–5.5 V supply operation, and AEC-Q100 Rev. H qualification for automotive applications.

For engineers reviewing the TC7WH125FK,LJ(CT) datasheet, TC7WH125FK,LJ(CT) pinout, TC7WH125FK,LJ(CT) application, or TC7WH125FK,LJ(CT) equivalent, key selection criteria include its -40 to 125 °C operating range, 5.5 V tolerant inputs, low 2.0 µA max ICC quiescent current, and US8 (SOT-765) 8-pin package with verified 3-state control timing.

Technical Context

This device implements two independent CMOS non-inverting buffers, each with separate 3-state enable control (G for Y output, H for Z output). Its logic function supports bidirectional bus isolation where outputs enter high-impedance state when respective enables are inactive.

Designed for mixed-voltage interfacing, it accepts 5.5 V tolerant inputs while operating from 2.0–5.5 V VCC, enabling level translation between 3.3 V and 5.0 V domains. Propagation delay (tPLH/tPHL) and 3-state timing (tPZL/tPLZ) are specified across temperature and load conditions, supporting deterministic timing closure in automotive infotainment and body control modules.

Key Specifications

Pinout & Package

TC7WH125FK,LJ(CT) uses the US8 (JEDEC SOT-765) 8-pin ultra-thin shrink small-outline package (2.1 × 2.0 × 0.55 mm), optimized for space-constrained automotive modules and portable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 3-state bus buffer applications.

Compared with SN74LVC2G125DCUR and 74LVC2T45DP,122, the TC7WH125FK,LJ(CT) uniquely combines AEC-Q100 qualification, -40 to 125 °C operation, and dual independent 3-state enables-making it the sole option for automotive-grade bus isolation where reliability and temperature resilience are mandatory.

Availability

TC7WH125FK,LJ(CT) is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, and medical diagnostic equipment interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TC7WH125FK,LJ(CT) 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 high-reliability semiconductor solutions for automotive, industrial, and consumer applications, with emphasis on AEC-Q100-qualified logic and power devices.

The TC7WH125FK,LJ(CT) belongs to Toshiba's TC7WH series of high-speed CMOS bus buffers, engineered specifically for automotive infotainment, body electronics, and ADAS subsystems demanding robust 3-state control and wide voltage interoperability.

FAQ

What is the maximum operating temperature for TC7WH125FK,LJ(CT)?

The TC7WH125FK,LJ(CT) is rated for continuous operation from -40 °C to +125 °C, validated per AEC-Q100 Rev. H requirements. This specification applies specifically to devices with ordering part number ending in J(CT, as confirmed in Section 2 and Section 8 of the official Toshiba datasheet Rev. 4.0.B. Operation beyond this range may cause parametric degradation or functional failure.

Does TC7WH125FK,LJ(CT) support 5 V logic inputs when powered from 3.3 V?

Yes, TC7WH125FK,LJ(CT) supports 5.5 V tolerant inputs regardless of VCC voltage (2.0–5.5 V), meaning it can accept 5 V logic signals while operating from a 3.3 V supply. This capability is explicitly stated in Feature (6) and verified in Absolute Maximum Ratings (VIN = -0.5 to 7.0 V) and Operating Ranges (VIN = 0 to 5.5 V), eliminating need for external level-shifting circuitry.

What is the propagation delay of TC7WH125FK,LJ(CT) at 3.3 V supply?

At VCC = 3.3 ± 0.3 V and CL = 15 pF, the typical propagation delay (tPLH/tPHL) of TC7WH125FK,LJ(CT) is 5.6 ns, with a maximum of 8.0 ns over temperature and process variation. This value is documented in Section 9.4 AC Characteristics (Ta = 25 °C) and remains within 11.0 ns max at -40 to 125 °C per Section 9.6.

Is TC7WH125FK,LJ(CT) pin-compatible with standard 8-pin SOIC logic buffers?

No, TC7WH125FK,LJ(CT) uses the US8 (SOT-765) package - a 2.1 × 2.0 mm 8-pin ultra-thin leadless package - which is not pin-compatible with standard SOIC-8 or TSSOP-8 footprints. Its pin assignment (A-G-Y-GND-VCC-B-H-Z) differs from industry-standard dual buffer layouts, requiring dedicated PCB layout per the top-view marking diagram in Section 4 of the datasheet.

How does the 3-state enable logic work on TC7WH125FK,LJ(CT)?

TC7WH125FK,LJ(CT) provides two independent active-low 3-state enables: pin 2 (G) controls output Y, and pin 7 (H) controls output Z. When G = HIGH, Y enters high-impedance state; when G = LOW, Y follows A. Similarly, H = HIGH disables Z, and H = LOW enables Z to follow B. This dual-enable architecture allows asynchronous isolation of each data path, as defined in the Truth Table (Section 6) and Functional Description (Section 1).