onsemi MC74VHC1GT00DFT1

Overview

MC74VHC1GT00DFT1 from onsemi is a single 2-input NAND gate with TTL-level input thresholds, designed for level-shifting and logic interfacing in mixed-voltage systems (2.0 V to 5.5 V). It features over-voltage tolerant inputs/outputs up to 5.5 V, IOFF partial power-down protection, and 3.5 ns typical propagation delay at 5 V. It is used in portable instrumentation, industrial control I/O conditioning, and 3 V/5 V bus interface circuits.

For engineers reviewing the MC74VHC1GT00DFT1 datasheet, pinout, applications, or equivalent options, key selection criteria include input threshold compatibility (TTL vs. CMOS), over-voltage tolerance for voltage translation, IOFF support for hot-swap operation, and SC-88A package footprint constraints.

Technical Context

The MC74VHC1GT00DFT1 implements a standard 2-input NAND logic function using advanced VHC CMOS technology with TTL-compatible input thresholds (VIH = 1.0 V min at 2.0 V VCC; VIL = 0.28 V max). Its input structure tolerates voltages up to 5.5 V independent of VCC, enabling safe interfacing between 3 V and 5 V domains without external clamping.

It supports partial power-down via IOFF (input/output off-state leakage ≤10 µA when VCC = 0 V), and its output drives ±8 mA at 3.0 V while maintaining VOL ≤ 0.52 V and VOH ≥ 2.34 V across −55 °C to +125 °C. Propagation delay is specified at CL = 15 pF and CL = 50 pF, with tPLH/tPHL ranging from 3.0 ns (5.5 V) to 11.0 ns (−55 °C, 3.0 V).

Key Specifications

Pinout & Package

MC74VHC1GT00DFT1 is packaged in SC-88A (Case 419A), a 5-pin surface-mount package measuring 2.0 mm × 1.25 mm × 0.95 mm with 0.65 mm pitch. Pin 1 is marked by a dot or beveled edge; orientation follows JEDEC standard for SC-88A tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single 2-input NAND gate applications.

Compared with SN74LVC1G00DBVR and 74AUP1G00GW,125, the MC74VHC1GT00DFT1 uniquely combines TTL input compatibility, 5.5 V over-voltage tolerance, and IOFF - making it the only option among the three qualified for mixed 3 V/5 V hot-swap I/O bridging without additional protection circuitry.

Availability

MC74VHC1GT00DFT1 is available at Aetrix Electronics and suitable for industrial sensor interface, portable instrumentation I/O, and automotive body control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MC74VHC1GT00DFT1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

The MC74VHC1GT00DFT1 belongs to the VHC logic family, engineered for high-speed, low-power, mixed-voltage interoperability in space- and power-constrained embedded systems.

FAQ

What is the input voltage threshold behavior of the MC74VHC1GT00DFT1?

The MC74VHC1GT00DFT1 uses TTL-level input thresholds: VIH is guaranteed ≥1.0 V at VCC = 2.0 V and ≥2.0 V at VCC = 5.5 V; VIL is guaranteed ≤0.28 V at VCC = 2.0 V and ≤0.8 V at VCC = 5.5 V. This allows reliable detection of standard 5 V TTL logic highs and lows even when powered from 2.0–3.3 V supplies - a key differentiator from CMOS-threshold variants like MC74VHC1G00.

Does the MC74VHC1GT00DFT1 support hot insertion or partial power-down?

Yes, the MC74VHC1GT00DFT1 supports partial power-down via its IOFF feature: when VCC = 0 V, input and output leakage remains ≤10 µA, preventing back-current flow and signal contention. This enables safe hot insertion into live backplanes or modular systems - confirmed in the datasheet's DC Electrical Characteristics table under IOFF parameter.

Which package does the MC74VHC1GT00DFT1 use, and what are its dimensions?

The MC74VHC1GT00DFT1 uses the SC-88A package (Case 419A), a 5-pin surface-mount outline measuring 2.0 mm × 1.25 mm × 0.95 mm with 0.65 mm lead pitch. Pin 1 is identified by a beveled corner or microdot marking, and the device is supplied in 3000-piece tape-and-reel format per the ordering information table.

Can the MC74VHC1GT00DFT1 safely interface 5 V signals to a 3 V microcontroller?

Yes - the MC74VHC1GT00DFT1 has over-voltage tolerant inputs and outputs rated to 5.5 V regardless of VCC level. When powered from 3 V, it accepts 5 V logic signals directly on pins A, B, or Y without damage or clamping diodes, and outputs valid 3 V logic levels compatible with 3 V MCU inputs - verified in the Absolute Maximum Ratings and Recommended Operating Conditions tables.

What is the typical propagation delay of the MC74VHC1GT00DFT1 at 3.3 V?

At VCC = 3.3 V, CL = 15 pF, and TA = 25 °C, the MC74VHC1GT00DFT1 exhibits a typical propagation delay (tPLH/tPHL) of 4.5 ns, with a maximum of 9.5 ns over −40 °C to +85 °C. This value is explicitly listed in the AC Electrical Characteristics table under "CL = 15 pF, VCC = 3.0 to 3.6 V" conditions.