STMicroelectronics 74VHCT02AMTR

Overview

74VHCT02AMTR from STMicroelectronics is a high-speed CMOS quad 2-input NOR gate in SO-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 timing circuits.

For engineers reviewing the 74VHCT02AMTR datasheet, 74VHCT02AMTR pinout, 74VHCT02AMTR application, or 74VHCT02AMTR equivalent, key selection criteria include propagation delay matching, input voltage tolerance up to 7 V independent of VCC, power-down protection on all I/Os, and ESD immunity of 2 kV per IEC 61000-4-2.

Technical Context

The device implements four independent NOR gates using sub-micron C2MOS technology with three-stage buffered outputs, delivering high noise immunity and stable switching. Its input structure accepts 0–7 V regardless of VCC, enabling robust interfacing across mixed-voltage domains.

All inputs and outputs feature diode-based ESD protection and power-down isolation, allowing safe operation during partial power-up or hot insertion. The symmetrical output impedance (|IOH| = |IOL| ≥ 8 mA) ensures matched rise/fall times and balanced tPLH/tPHL propagation delays.

Key Specifications

Pinout & Package

74VHCT02AMTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, surface-mount, tape-and-reel format (MTR suffix), with standard 1.27 mm pitch and JEDEC MS-012AC dimensions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input NOR gate applications.

Compared with SN74VHC02DR and 74LCX02MTCX, the 74VHCT02AMTR uniquely combines 5 V TTL compatibility, 7 V input tolerance, and sub-µA quiescent current - making it the sole choice for mixed-voltage industrial interfaces requiring zero-risk power sequencing.

Availability

74VHCT02AMTR is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, legacy system upgrades, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for 74VHCT02AMTR 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 analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The VHCT logic family targets high-speed, low-power 5 V CMOS applications with TTL-compatible inputs, emphasizing robustness in harsh electrical environments and seamless integration into legacy 5 V systems.

FAQ

Can 74VHCT02AMTR operate with VCC = 4.5 V while accepting 5 V inputs?

Yes. The device is fully specified for VCC = 4.5–5.5 V and supports input voltages from 0–7 V regardless of supply level. This allows safe interfacing with 5 V TTL outputs even at minimum VCC, with guaranteed VIH/VIL margins maintained per Table 5 and Table 6.

Does 74VHCT02AMTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be tied directly to VCC or GND. The internal input structure includes no floating nodes, and the datasheet confirms stable logic states under all defined VI conditions. External resistors add unnecessary board area and leakage risk.

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

The AC specifications are characterized up to 50 pF (Table 7). Driving >50 pF increases propagation delay nonlinearly and may exceed VOLP limits. For loads >50 pF, add a series resistor (22–47 Ω) near the output to damp ringing and maintain signal integrity.

Is 74VHCT02AMTR qualified for automotive applications per AEC-Q100?

No. While it meets industrial temperature range (–55°C to +125°C) and has improved latch-up immunity, STMicroelectronics does not list this part in its AEC-Q100 qualified portfolio. Automotive designs require explicitly qualified variants such as the 74VHCT02AQTR.