Texas Instruments SN74HC00NS

Overview

SN74HC00NS from Texas Instruments is a quad 2-input NAND gate IC in SO (14) package, performing Y = A ● B Boolean logic per channel with buffered CMOS inputs, 2 V to 6 V supply operation, –40°C to +85°C temperature range, and fanout support up to 10 LSTTL loads - used in tamper-detect circuits and S-R latch implementations.

For engineers reviewing the SN74HC00NS datasheet, SN74HC00NS pinout, SN74HC00NS application, or SN74HC00NS equivalent, key selection considerations include propagation delay (8–23 ns at 4.5–6 V), output drive capability (±4 mA/±5.2 mA), input leakage (±1000 µA max), and SO-14 mechanical compatibility with board-level space constraints.

Technical Context

This device implements four independent, unidirectional NAND gates using standard CMOS process technology. Each gate features balanced push-pull outputs capable of sourcing and sinking matched currents, and high-impedance inputs with clamping diodes for ESD protection.

Logic operation follows positive-logic Boolean function Y = A ● B, with defined VIH/VIL thresholds across supply voltages (e.g., VIH ≥ 3.15 V at VCC = 4.5 V), and switching behavior governed by propagation delay (tpd) and transition time (tt) specifications validated over commercial temperature range.

Key Specifications

Pinout & Package

SN74HC00NS is housed in a 14-pin Small Outline (SO) package with nominal body size 10.20 mm × 5.30 mm, surface-mount compatible, and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate applications.

Compared with SN74HC00NS, SN74HCT00NS offers improved noise immunity for TTL-level inputs but sacrifices some low-voltage (2–3 V) operation margin, while MC74HC00AD provides identical performance with second-source availability - both retain the same SO-14 mechanical fit and thermal profile.

Availability

SN74HC00NS is available at Aetrix Electronics and suitable for alarm systems, latch-based control logic, LED interface circuits, and level-shifting applications requiring stable component supply across production lifecycles.

Supply support for SN74HC00NS 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

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power, and signal chain technologies.

The SN74HC00NS belongs to TI's 74HC high-speed CMOS logic family, designed for low-power, pin-compatible replacements of legacy TTL logic in industrial, automotive, and communications equipment.

FAQ

What is the maximum operating supply voltage for SN74HC00NS?

The absolute maximum supply voltage for SN74HC00NS is 7 V, but the recommended operating range is 2 V to 6 V per TI's SCLS181H datasheet. Operation above 6 V risks exceeding absolute maximum ratings and may cause irreversible damage. For reliable long-term use, SN74HC00NS should be powered within 2–6 V, with 5 V being the most common implementation point.

Can unused inputs on SN74HC00NS be left floating?

No, unused inputs on SN74HC00NS must never be left floating. The CMOS inputs have high impedance and undefined voltage states when unconnected, which can cause excessive power consumption, oscillation, or unpredictable logic behavior. Each unused input must be tied to either VCC or GND using a direct connection or a 10-kΩ pull-up/pull-down resistor - as specified in Section 8.4 and 11.1 of the SN74HC00NS datasheet.

Does SN74HC00NS support 3.3 V logic systems?

Yes, SN74HC00NS fully supports 3.3 V operation: its recommended supply range includes 3.3 V, VIH(min) = 2.31 V and VIL(max) = 1.09 V at that voltage, providing adequate noise margin. All electrical and switching characteristics - including tpd = 15 ns (max) and output drive - are guaranteed across the full 2–6 V range, making SN74HC00NS suitable for mixed-voltage designs involving 3.3 V microcontrollers or FPGAs.

What is the thermal resistance (RθJA) of SN74HC00NS in its SO package?

The junction-to-ambient thermal resistance (RθJA) for SN74HC00NS in the SO-14 package is 91.0°C/W, as specified in Table 6.4 of the TI datasheet. This value assumes standard JEDEC 2-layer board conditions. Actual thermal performance depends on PCB copper area, airflow, and nearby heat sources - but under typical industrial ambient conditions (<50°C), SN74HC00NS dissipates negligible heat due to its sub-20 µA ICC and low Cpd.

Is SN74HC00NS pin-compatible with SN74LS00N?

No, SN74HC00NS is not pin-compatible with SN74LS00N. While both are quad 2-input NAND gates in 14-pin packages, SN74LS00N uses PDIP (19.3 × 6.4 mm), whereas SN74HC00NS uses SO (10.2 × 5.3 mm) - different footprints, lead pitch, and mounting method. Electrically, SN74HC00NS has CMOS inputs and outputs; SN74LS00N uses bipolar TTL. Direct PCB replacement requires layout revision and voltage compatibility verification.