STMicroelectronics M74HCT00B1R

Overview

M74HCT00B1R from STMicroelectronics is a high-speed CMOS quad 2-input NAND gate in 14-pin plastic DIP package, featuring 12 ns typical propagation delay at 4.5 V, 4 mA output drive capability, TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and 1 µA max quiescent ICC at 25°C - deployed in digital logic interfacing between HCMOS, TTL, and NMOS systems.

For engineers reviewing the M74HCT00B1R datasheet, M74HCT00B1R pinout, M74HCT00B1R application, or M74HCT00B1R equivalent, key selection criteria include propagation delay symmetry (tPLH ≅ tPHL), balanced output impedance (|IOH| = IOL = 4 mA min), rail-to-rail output swing under load, and static discharge protection on all inputs.

Technical Context

The M74HCT00B1R implements four independent NAND gates using silicon gate C2MOS technology with three-stage buffered outputs, enabling high noise immunity and stable switching across industrial temperature ranges (–55°C to +125°C). Its input structure includes integrated protection diodes against ESD and transient overvoltage.

It operates within 4.5–5.5 V supply range and supports input rise/fall times up to 500 ns. DC input voltage tolerance extends from –0.5 V to VCC + 0.5 V, and output drive is specified for both sourcing (–4 mA) and sinking (4 mA) conditions with defined VOH/VOL limits at those loads.

Key Specifications

Pinout & Package

Package: Plastic Dual In-line Package (DIP-14), 0.3-inch body width, through-hole mounting. Pin pitch: 2.54 mm (0.1 inch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT00N and 74HCT00D, the M74HCT00B1R uniquely combines extended temperature range (–55°C to +125°C), DIP-14 through-hole packaging, and lowest quiescent current (1 µA), making it optimal for ruggedized industrial and automotive prototyping and low-power legacy upgrades.

Availability

M74HCT00B1R is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic instrumentation requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for M74HCT00B1R 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 management devices, and discrete components for industrial, automotive, and consumer markets.

The M74HCT00B1R belongs to ST's legacy HCT logic family, engineered specifically for seamless interoperability between TTL, NMOS, and CMOS systems while delivering enhanced noise immunity and extended temperature reliability.

FAQ

Is M74HCT00B1R pin-compatible with standard 74LS00?

Yes - M74HCT00B1R is pin- and function-compatible with 74LS00, including identical DIP-14 pinout and NAND logic behavior. However, its CMOS input structure draws significantly less current (±0.1 µA vs. LS's 0.4–1.6 mA), reducing loading on upstream drivers and enabling higher fanout without buffers.

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

The M74HCT00B1R is characterized for CL = 50 pF in AC specifications, with guaranteed 12 ns tPD and clean edges. It can drive up to 70 pF while staying within 20 ns tPD and maintaining VOL ≤ 0.4 V at 4 mA sink, provided layout minimizes trace inductance and uses proper VCC decoupling.

Does this part support mixed-voltage operation (e.g., 3.3 V inputs with 5 V supply)?

No - M74HCT00B1R requires VI to remain within –0.5 V to VCC + 0.5 V. With VCC = 5 V, 3.3 V inputs are valid (within 0–5 V range), but 3.3 V–only logic families may not meet its VIH = 2.0 V minimum reliably under worst-case VCC and temperature. Level-shifting is recommended for guaranteed compatibility.

Can M74HCT00B1R be used in place of 74HC00 in a 5 V system?

Yes, but with caution: M74HCT00B1R has TTL-compatible inputs (VIH = 2.0 V), whereas 74HC00 requires VIH = 3.5 V at 5 V. In noisy or marginal 5 V HC systems, HCT's lower threshold improves noise immunity. However, HC offers higher speed (8 ns tPD) and wider VCC range (2–6 V); HCT trades some speed for interface robustness.