Toshiba Semiconductor and Storage 74VHC74FT

Overview

74VHC74FT from Toshiba Electronic Devices & Storage Corporation is a dual D-type flip-flop with independent preset and clear inputs, fabricated using silicon gate C2MOS technology. It operates across 2.0–5.5 V supply, delivers 170 MHz max clock frequency at 5.0 V, and supports automotive-grade temperature range (−40 to +125 °C), enabling use in engine control units and industrial PLC timing circuits.

For engineers reviewing the 74VHC74FT datasheet, 74VHC74FT pinout, 74VHC74FT application, or 74VHC74FT equivalent, this device serves as a high-speed, low-power, AEC-Q100 qualified logic building block for synchronous edge-triggered data latching, state storage, and clock domain interfacing in mixed-voltage systems.

Technical Context

The 74VHC74FT implements two independent positive-edge-triggered D flip-flops, each with asynchronous active-low preset (PR) and clear (CLR) inputs that override clock action. Its C2MOS process enables TTL-compatible speed while maintaining CMOS-level quiescent current (≤2.0 µA).

Input protection circuitry allows safe 0–5.5 V input voltage regardless of VCC, supporting robust 5 V ↔ 3.3 V level translation. Propagation delays are balanced (tPLH ≈ tPHL), and noise immunity meets VNIH/VNIL ≥ 28% VCC minimum - critical for noisy automotive and industrial environments.

Key Specifications

Pinout & Package

TSSOP14B - 14-pin thin shrink small outline package (4.4 mm × 5.0 mm × 1.2 mm height), lead-free and RoHS compliant, optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual D-type flip-flop applications.

Compared with SN74LVC74APW and 74AHC74PW, the 74VHC74FT uniquely combines AEC-Q100 qualification, 5.5 V input tolerance, and 2.0 µA max ICC - making it the only option among the three validated for automotive powertrain and safety-critical body electronics.

Availability

74VHC74FT is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and smart meter communication interface implementation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC74FT 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 high-reliability semiconductor components for automotive, industrial, and consumer applications, with emphasis on quality, longevity, and regulatory compliance.

The 74VHC74FT belongs to Toshiba's VHC logic family - engineered specifically for high-speed, low-power, mixed-voltage digital interfacing in harsh-environment applications demanding AEC-Q100 reliability.

FAQ

What is the maximum operating temperature range for the 74VHC74FT?

The 74VHC74FT is rated for operation from −40 °C to +125 °C and is AEC-Q100 Rev. H qualified. This full automotive temperature range is confirmed in Toshiba's official datasheet Rev. 5.0.B and applies across the entire specified supply voltage range (2.0–5.5 V), making the 74VHC74FT suitable for under-hood and industrial control applications where thermal stress is significant.

Does the 74VHC74FT support 3.3 V and 5 V logic level translation?

Yes - the 74VHC74FT features input protection that allows 0–5.5 V applied to any input pin regardless of VCC, enabling seamless interfacing between 3.3 V microcontrollers and 5 V peripherals without external level shifters. This capability is explicitly documented in the "General" section of the Toshiba datasheet and verified across all operating conditions for the 74VHC74FT.

Is the 74VHC74FT pin-compatible with standard 74-series D flip-flops?

Yes - the 74VHC74FT is pin and function compatible with industry-standard 74AC/HC/AHC-family dual D flip-flops (e.g., 74HC74, 74AC74) in the TSSOP14B package. Pin assignments for D, CLK, PR, CLR, Q, and Q̅ match the JEDEC-standard 14-pin dual D flip-flop layout, allowing drop-in replacement in existing designs where VHC speed and voltage range are beneficial.

What is the typical propagation delay of the 74VHC74FT at 5.0 V supply?

At VCC = 5.0 V and CL = 50 pF, the 74VHC74FT exhibits typical propagation delays of tPLH = 6.1 ns and tPHL = 6.1 ns (CK-to-Q), with maximum values of 9.3 ns. These values are measured per Toshiba datasheet Rev. 5.0.B Section 11.7 and reflect balanced output transitions critical for clock-domain crossing and synchronous logic stability in the 74VHC74FT.

Does the 74VHC74FT include power-down protection on its inputs?

Yes - the 74VHC74FT incorporates power-down input protection, ensuring all inputs remain high-impedance and non-damaging even when VCC = 0 V. This feature is explicitly listed in Section 3 "Features" of the Toshiba datasheet and prevents back-driving or latch-up during partial power sequencing - a key requirement for modular systems and hot-swap interfaces using the 74VHC74FT.