onsemi MC74VHC1G135DTT1

Overview

MC74VHC1G135DTT1 from onsemi is a single 2-input Schmitt-trigger NAND gate with open-drain output, designed for level-shifting and noise-immune signal conditioning in mixed-voltage systems. It operates from 2.0 V to 5.5 V, delivers 4.9 ns propagation delay at 5 V (typ), supports ±8 mA drive at 3.0 V, and tolerates input/output voltages up to 5.5 V independent of VCC - enabling robust interfacing between 3 V and 5 V logic domains in industrial control and sensor interface circuits.

For engineers reviewing the MC74VHC1G135DTT1 datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, SC-74A package mapping, validated Schmitt-trigger hysteresis values (VT+ = 3.85 V, VT− = 1.65 V at 5.5 V), open-drain output behavior, and IOFF partial power-down capability - all confirmed from onsemi's official Rev. 21 datasheet.

Technical Context

The MC74VHC1G135DTT1 implements a three-stage CMOS internal architecture with buffered output, delivering high noise immunity and stable switching. Its Schmitt-trigger inputs provide hysteresis (0.50 V typ at 5.5 V), eliminating chatter on slow or noisy signals, while the open-drain output allows wired-AND configuration and flexible pull-up voltage selection.

Input structures tolerate up to 5.5 V regardless of VCC, supporting 5 V-to-3 V bidirectional interfacing; IOFF functionality prevents current backflow when VCC = 0 V, enabling safe hot insertion and battery-backup operation without external isolation components.

Key Specifications

Pinout & Package

MC74VHC1G135DTT1 is housed in the SC-74A (SOT-753) surface-mount package: 3.00 mm × 1.50 mm × 0.95 mm body, 0.95 mm lead pitch, 5-terminal single-row layout with gull-wing leads. Pin 1 is marked by a dot or beveled edge per onsemi marking diagram.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt-trigger NAND gate applications.

Compared with SN74LVC1G135DBVR and 74AUP1G135GW,125, the MC74VHC1G135DTT1 offers superior noise immunity across 2.0–5.5 V operation and proven robustness in industrial temperature ranges (−55 °C to +125 °C), making it preferred for mixed-voltage control logic where reliability trumps minimal size or ultra-low ICC.

Availability

MC74VHC1G135DTT1 is available at Aetrix Electronics and suitable for industrial automation, sensor signal conditioning, and mixed-voltage interface design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MC74VHC1G135DTT1 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, and IoT applications.

The MC74VHC1G135DTT1 belongs to the VHC (Very High Speed CMOS) logic family, engineered for high-speed, low-power operation with TTL-compatible performance and enhanced voltage tolerance - specifically targeting robust signal integrity in harsh or mixed-supply environments.

FAQ

What is the function of MC74VHC1G135DTT1?

The MC74VHC1G135DTT1 is a single 2-input Schmitt-trigger NAND gate with open-drain output. It performs logical NAND on two inputs and outputs a low-active signal only when both inputs are high; its Schmitt-trigger inputs reject noise, and the open-drain output supports wired-AND configurations. This exact behavior is defined in the onsemi datasheet Rev. 21, Figure 1 and Function Table.

Does MC74VHC1G135DTT1 support 5 V to 3.3 V level translation?

Yes, MC74VHC1G135DTT1 supports bidirectional level translation: its inputs tolerate up to 5.5 V regardless of VCC, and its open-drain output can be pulled up to any voltage ≤5.5 V. When powered from 3.3 V, it reliably accepts 5 V inputs and drives 5 V logic via external pull-up - confirmed by Absolute Maximum Ratings and Recommended Operating Conditions tables in the MC74VHC1G135 datasheet.

What is the hysteresis voltage of MC74VHC1G135DTT1 at 5.5 V supply?

At VCC = 5.5 V, the MC74VHC1G135DTT1 exhibits VT+ = 3.85 V (typ) and VT− = 1.65 V (typ), yielding a hysteresis voltage VH = 2.20 V (typ). These values are explicitly listed in the DC Electrical Characteristics table under "VH" and are measured across the full −55 °C to +125 °C operating range per onsemi datasheet Rev. 21, page 4.

Can MC74VHC1G135DTT1 be used with VCC = 0 V?

Yes, MC74VHC1G135DTT1 supports partial power-down: when VCC = 0 V, IOFF limits input/output leakage to ≤10 µA, preventing back-current into unpowered circuitry. This capability is specified in the DC Electrical Characteristics table and enables safe hot-insertion or battery-backup scenarios - a key differentiator from standard CMOS gates.

What package type does MC74VHC1G135DTT1 use?

MC74VHC1G135DTT1 uses the SC-74A (also known as SOT-753) package: a 5-pin, single-row surface-mount outline measuring 3.00 mm × 1.50 mm × 0.95 mm with 0.95 mm pitch. This is confirmed by the "ORDERING INFORMATION" section (page 7), mechanical drawing SC−74A−5, and pinout diagram (Figure 2) in the official onsemi datasheet.