STMicroelectronics 74VHCT00ATTR

Overview

74VHCT00ATTR from STMicroelectronics is a quad 2-input NAND gate IC in TSSOP-14 package, operating at 4.5–5.5 V, with 5 ns typical propagation delay, ±8 mA symmetrical output drive, and TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). It enables logic-level translation between 5 V and 3 V systems in industrial control and embedded interface circuits.

For engineers reviewing the 74VHCT00ATTR datasheet, 74VHCT00ATTR pinout, 74VHCT00ATTR application, or 74VHCT00ATTR equivalent, key selection criteria include its power-down protected I/Os, 2 kV ESD immunity, low quiescent current (2 µA max), and guaranteed noise margins under fast-switching conditions.

Technical Context

This device implements four independent NAND gates using sub-micron C2MOS technology with buffered outputs for enhanced noise immunity. Each gate features identical AC/DC electrical characteristics across temperature ranges from –55 °C to +125 °C.

Input protection allows 0–7 V tolerance regardless of VCC, enabling hot-swap and mixed-voltage interfacing. Output stages deliver matched |IOH| = |IOL| ≥ 8 mA under 4.5–5.5 V supply, ensuring balanced rise/fall times (tPLH ≅ tPHL) and low dynamic ground bounce (VOLP ≤ 0.8 V).

Key Specifications

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package), 4.9 mm × 6.4 mm body, 0.65 mm pitch, 1.2 mm height - optimized for high-density PCB layouts with thermal and mechanical reliability in reflow-soldered assemblies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74VHCT00PW, 74VHCT00ATTR offers identical performance and drop-in compatibility; versus 74VHC00MTR, it provides essential TTL threshold support and superior mixed-voltage interoperability without added components.

Availability

74VHCT00ATTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic equipment requiring stable component supply across extended temperature and long-life production cycles.

Supply support for 74VHCT00ATTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, analog ICs, power devices, and discrete components for industrial, automotive, and consumer markets.

The VHCT logic family targets high-speed, low-power 5 V CMOS applications with TTL input compatibility - specifically engineered for seamless integration into legacy and hybrid voltage systems.

FAQ

Can 74VHCT00ATTR operate with a 3.3 V supply?

No. The device is specified only for 4.5–5.5 V operation per Recommended Operating Conditions (Table 5). At 3.3 V, VIH and VIL thresholds are not guaranteed, and output drive strength degrades significantly below 4.5 V. Use 74VHC00 or 74LVC00 for true 3.3 V operation.

Does 74VHCT00ATTR require external pull-up resistors on inputs?

No. Inputs are TTL-compatible with defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds and include internal protection circuitry. Pull-ups are unnecessary unless floating inputs must be held HIGH in unpowered states - in which case, power-down protection ensures safe high-Z behavior.

What is the maximum capacitive load this device can drive reliably?

The AC Electrical Characteristics table specifies performance up to CL = 50 pF. Driving heavier loads increases propagation delay and may cause VOLP/VOLV violations. For >50 pF, add series termination or buffer stages; layout best practices (short traces, ground plane) are critical to maintain 5 ns timing integrity.

Is 74VHCT00ATTR suitable for use in safety-critical automotive applications?

It meets AEC-Q100 stress test requirements for temperature cycling and ESD (2 kV HBM), but is not officially qualified to AEC-Q100 Grade 1 or ASIL-B. For safety-critical functions, ST recommends automotive-qualified variants like the 74VHCT00AQTR with full PPAP documentation and extended reliability testing.