onsemi MC74VHC1G09DTT1G

Overview

MC74VHC1G09DTT1G from onsemi is a single 2-input AND gate with open-drain output, designed for level-shifting and wired-OR logic in mixed-voltage systems. It operates from 2.0 V to 5.5 V, delivers 4.3 ns propagation delay at 5 V (typ), supports 8 mA output drive at 3.0 V, and features overvoltage-tolerant inputs/outputs up to 5.5 V - enabling reliable interfacing between 3 V and 5 V domains in industrial control I/O modules.

For engineers reviewing the MC74VHC1G09DTT1G datasheet, pinout, applications, or equivalent options, key selection criteria include open-drain compatibility with I²C pull-up networks, IOFF partial power-down protection during hot-swap events, and validated operation across −55 °C to +125 °C for automotive body electronics and programmable logic controllers.

Technical Context

This device implements standard positive-logic AND functionality with an open-drain output stage, requiring an external pull-up resistor to define high-level voltage and enable wired-OR bus topologies. Its silicon-gate CMOS process ensures TTL-compatible speed while maintaining sub-1 μA quiescent current at VCC = 5.5 V and TA = 25 °C.

The input structure tolerates voltages up to 5.5 V independent of VCC, and the IOFF feature disables input leakage when VCC = 0 V - critical for backplane hot-insertion and battery-backed subsystems where supply sequencing is uncontrolled.

Key Specifications

Pinout & Package

MC74VHC1G09DTT1G is packaged in SC-74A (SOT-23-5), a 3.00 mm × 1.50 mm × 0.95 mm surface-mount package with 0.95 mm lead pitch and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input AND gate with open-drain output applications.

Compared with SN74LVC1G09DBVR and 74AUP1G09GW,125, the MC74VHC1G09DTT1G uniquely combines 5.5 V overvoltage tolerance, IOFF, and open-drain output in a single SC-74A package - making it the only option among the three qualified for uncontrolled mixed-voltage interfaces and hot-plug operation.

Availability

MC74VHC1G09DTT1G is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and I²C address configuration requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for MC74VHC1G09DTT1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74VHC1G09DTT1G belongs to the VHC logic family, engineered for high-speed, low-power operation in mixed-voltage digital systems requiring robust level translation and fault-tolerant interfacing.

FAQ

What is the maximum input voltage allowed on pins A or B of the MC74VHC1G09DTT1G?

The MC74VHC1G09DTT1G allows DC input voltages up to 5.5 V on pins A and B - regardless of the VCC supply voltage. This overvoltage tolerance is guaranteed per the Absolute Maximum Ratings table and enables safe interfacing with 5 V signals even when VCC is set to 2.0 V or 3.3 V. Exceeding 5.5 V risks permanent damage.

Does the MC74VHC1G09DTT1G support partial power-down operation?

Yes, the MC74VHC1G09DTT1G supports partial power-down via its IOFF feature: when VCC = 0 V, input leakage current is limited to ≤10 μA, preventing back-current flow and signal contention. This behavior is verified in the DC Electrical Characteristics table under IOFF test conditions and is essential for hot-swap and battery-backup applications.

What package type is used for the MC74VHC1G09DTT1G?

The MC74VHC1G09DTT1G uses the SC-74A (also known as SOT-23-5) package - a 5-pin, surface-mount outline measuring 3.00 mm × 1.50 mm × 0.95 mm with 0.95 mm lead pitch. This matches the ordering code "DBVT1G" in onsemi's documentation and is distinct from the SC-88A (SOT-353) variant.

Can the MC74VHC1G09DTT1G be used as a level shifter between 5 V and 3.3 V logic domains?

Yes, the MC74VHC1G09DTT1G is explicitly designed for this role: its inputs tolerate 5.5 V independently of VCC, and it operates down to 2.0 V. When powered from 3.3 V, it reliably accepts 5 V inputs and drives an open-drain output compatible with either 3.3 V or 5 V pull-ups - satisfying bidirectional level-shifting requirements in mixed-voltage systems.

What is the typical propagation delay of the MC74VHC1G09DTT1G at 5 V supply?

The MC74VHC1G09DTT1G exhibits a typical propagation delay (tPD) of 4.3 ns at VCC = 5.0 V with CL = 15 pF, as specified in the AC Electrical Characteristics table. This value applies to both A→Y and B→Y transitions and reflects high-speed CMOS performance comparable to Bipolar Schottky TTL, while maintaining low static power consumption.