onsemi MM74HCT00SJ

Overview

MM74HCT00SJ from onsemi is a quad 2-input NAND gate IC fabricated in advanced silicon-gate CMOS technology, providing TTL/LS pinout and threshold compatibility, 14 ns typical propagation delay (tPLH/tPHL), ±25 mA output drive, and operation across −55°C to +125°C. It serves as a low-power logic interface between TTL, NMOS, and CMOS systems in industrial control and embedded timing circuits.

For engineers reviewing the MM74HCT00SJ datasheet, pinout, applications, or equivalent options, key selection criteria include LS-TTL compatibility, guaranteed 4.5–5.5 V supply operation, high fan-out (10 LS-TTL loads), static discharge protection, and TSSOP-14 package suitability for space-constrained PCB layouts.

Technical Context

The MM74HCT00SJ implements four independent 2-input NAND gates in a single monolithic CMOS die, with input thresholds aligned to LS-TTL (VIH = 2.0 V min, VIL = 0.8 V max) and output drive capability sufficient to sink or source 4.0 mA at VCC = 4.5 V while maintaining VOL ≤ 0.4 V and VOH ≥ 3.7 V. All inputs feature internal clamp diodes to VCC and GND for ESD protection.

It operates within a wide temperature range (−55°C to +125°C) and supports fast switching with guaranteed tPLH/tPHL ≤ 35 ns at CL = 50 pF and −55°C to +125°C, while maintaining low quiescent ICC ≤ 40 µA at TA = −55°C to +125°C under no-load conditions.

Key Specifications

Pinout & Package

TSSOP-14 (Case 948G), 4.9 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height - surface-mount package optimized for automated assembly and thermal performance in dense layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT00DR and 74VHC00M, the MM74HCT00SJ uniquely balances LS-TTL compatibility, extended-temperature operation, and compact TSSOP packaging-making it optimal for retrofitting legacy 74LS00-based systems where board space and thermal envelope are constrained.

Availability

MM74HCT00SJ is available at Aetrix Electronics and suitable for industrial control logic, automotive body electronics, and medical device interface circuits requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.

Supply support for MM74HCT00SJ 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and medical applications.

The MM74HCT00SJ belongs to onsemi's 74HCT logic family, engineered specifically to bridge TTL and CMOS domains with LS-compatible pinouts and thresholds while delivering CMOS power efficiency and noise immunity.

FAQ

Is MM74HCT00SJ compatible with 3.3 V logic systems?

No, MM74HCT00SJ is not designed for 3.3 V operation. Its recommended supply voltage is strictly 4.5 V to 5.5 V, and input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) assume a 5 V rail. Using it with 3.3 V inputs risks unreliable HIGH recognition and violates the Recommended Operating Conditions. For 3.3 V systems, consider the 74LVC00 or 74AHC00 families instead. The MM74HCT00SJ must be powered at 5 V and interfaced via level shifters if connecting to 3.3 V devices.

What is the maximum capacitive load MM74HCT00SJ can drive reliably?

The MM74HCT00SJ is characterized up to 50 pF load capacitance, with guaranteed propagation delay ≤35 ns and rise/fall times ≤22 ns across −55°C to +125°C. Driving loads beyond 50 pF may increase delay unpredictably and degrade edge integrity due to limited output drive (±4.0 mA). For higher capacitance, add a buffer stage or select a logic family with higher IOL/IOH ratings. This limit applies directly to the MM74HCT00SJ in all operating conditions.

Does MM74HCT00SJ support mixed-voltage interfacing without external components?

No, MM74HCT00SJ does not support mixed-voltage interfacing without external components. Its inputs require 2.0 V minimum for HIGH recognition and tolerate only up to VCC + 0.5 V, so direct connection to 3.3 V or 2.5 V outputs risks violating absolute maximum ratings or causing logic misreads. External level translators or resistive dividers are required. The MM74HCT00SJ is intended for homogeneous 5 V systems or buffered interfaces.

Can MM74HCT00SJ replace 74LS00 in an existing design without modifications?

Yes, MM74HCT00SJ is a pinout- and threshold-compatible drop-in replacement for 74LS00. It matches the same TSSOP-14 footprint, input/output voltage levels, and logic function. No PCB or firmware changes are needed. However, verify that the 5 V supply meets MM74HCT00SJ's 4.5–5.5 V range and that decoupling remains adequate, as CMOS inputs draw negligible DC current but demand low-impedance AC supply paths. This applies specifically to the MM74HCT00SJ.

What is the meaning of "SJ" suffix in MM74HCT00SJ?

The "SJ" suffix in MM74HCT00SJ denotes the TSSOP-14 package variant with Pb-free and halide-free construction per JEDEC J-STD-020B. It corresponds to Case 948G and is distinct from "MTCX" (same package, tape-and-reel) or "M" (SOIC-14). The marking "HCT 00A" appears on the top surface. This suffix identifies the exact mechanical and environmental specification of the MM74HCT00SJ unit supplied by onsemi.