Diodes Incorporated 74AHCT1G07QW5-7

Overview

74AHCT1G07QW5-7 from Diodes Incorporated is an automotive-grade single non-inverting buffer with open-drain output, designed for 4.5V–5.5V supply operation in AEC-Q100 Grade 1 environments (−40°C to +125°C). It delivers 8mA sink current at V_CC = 4.5V, features Schmitt-trigger inputs for noise immunity, and requires an external pull-up resistor to achieve HIGH logic level. It is used in automotive body control modules for wired-AND bus signaling.

For engineers reviewing the 74AHCT1G07QW5-7 datasheet, 74AHCT1G07QW5-7 pinout, 74AHCT1G07QW5-7 application, or 74AHCT1G07QW5-7 equivalent, key selection criteria include open-drain drive capability, −40°C to +125°C ambient operation, AEC-Q100 qualification, SOT25 package thermal performance, and compatibility with 5V logic buses requiring wired-logic interfacing.

Technical Context

This device implements a positive Boolean function (A = Y) with non-inverting logic and open-drain output architecture, enabling active-low wired-OR or active-high wired-AND configurations when multiple outputs share a common pull-up. Its Schmitt-trigger inputs tolerate slow-rising/falling signals up to 20 ns/V transition rate.

It operates strictly within 4.5V–5.5V V_CC, supports input voltages up to 6.5V (independent of V_CC), and guarantees VOL ≤ 0.55V at I_OL = 8mA and −40°C to +125°C. Propagation delays range from 1.0ns to 9.0ns depending on load capacitance (15pF/50pF) and temperature.

Key Specifications

Pinout & Package

SOT25 (3.0mm × 2.8mm × 1.2mm, 0.95mm lead pitch) - surface-mount, 5-pin package with exposed pad not present; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar open-drain buffer applications.

Compared with SN74AHCT1G07DBVR and 74LVC1G07GW,125, the 74AHCT1G07QW5-7 uniquely balances AEC-Q100 Grade 1 compliance, SOT25 thermal robustness (θ_JA = 184°C/W), and precise 4.5–5.5V operation-making it optimal for thermally demanding automotive control nodes where qualification and reliability outweigh voltage flexibility or minimal footprint.

Availability

74AHCT1G07QW5-7 is available at Aetrix Electronics and suitable for automotive body control modules, engine management diagnostics, ADAS camera synchronization, and electric power steering feedback conditioning requiring stable component supply across extended temperature ranges and full AEC-Q100 traceability.

Supply support for 74AHCT1G07QW5-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certified operations.

The 74AHCT logic family targets automotive and industrial applications requiring robust 5V logic interfacing with AEC-Q100 qualification, emphasizing noise immunity, wide temperature operation, and open-drain configurability for bus architectures.

FAQ

Is an external pull-up resistor required for 74AHCT1G07QW5-7 operation?

Yes. The open-drain output cannot source current; a pull-up resistor to V_CC or another logic rail is mandatory to establish a valid HIGH logic level. Typical values range from 1kΩ (for speed-critical 8mA drive) to 10kΩ (for low-power applications), selected based on rise time and bus loading requirements.

Can 74AHCT1G07QW5-7 interface with 3.3V logic systems?

Yes - its inputs accept voltages up to 6.5V regardless of V_CC, allowing safe connection to 3.3V CMOS outputs. However, its output HIGH level is defined solely by the external pull-up voltage, so pulling up to 3.3V yields 3.3V-compatible HIGH levels while retaining 5V V_CC for noise margin and drive strength.

What is the maximum capacitive load the output can drive reliably?

The datasheet specifies timing performance up to 50pF load capacitance, with t_PLZ/t_PZL ≤ 9.0ns at −40°C to +125°C. For loads exceeding 50pF, propagation delay increases linearly; derating is recommended above 75pF to maintain setup/hold margins in synchronous systems.

Does 74AHCT1G07QW5-7 support hot-swap or live-insertion?

No. While ESD-robust, it lacks powered-off protection circuitry. Applying input signals or pulling the output HIGH before V_CC is applied may cause latch-up or excessive current through input clamps. Power sequencing must ensure V_CC is stable before applying inputs or enabling pull-ups.