Texas Instruments SN74HC00PWT

Overview

SN74HC00PWT from Texas Instruments is a quadruple 2-input NAND gate IC in TSSOP-14 package, operating from 2 V to 6 V supply, delivering propagation delay as low as 8 ns at 6 V, with ±25 mA output drive capability and buffered CMOS inputs. It performs Y = A ● B Boolean logic per gate and is used in digital control logic, tamper detection, and S-R latch implementation.

For engineers reviewing the SN74HC00PWT datasheet, SN74HC00PWT pinout, SN74HC00PWT application, or SN74HC00PWT equivalent, key selection factors include its 14-pin TSSOP footprint, guaranteed operation across –40°C to +85°C, fanout support up to 10 LSTTL loads, and balanced push-pull output structure enabling reliable interfacing with legacy TTL and modern CMOS systems.

Technical Context

This device integrates four independent, identical 2-input NAND gates on a single die using standard silicon-gate CMOS process. Each gate features buffered inputs for noise immunity and balanced push-pull outputs capable of sourcing and sinking up to ±25 mA while maintaining VOH ≥ 5.48 V and VOL ≤ 0.33 V at 6 V supply and full load.

It operates within a wide 2 V–6 V VCC range and supports commercial temperature range (–40°C to +85°C). Input transition time must be ≤400 ns at 6 V to prevent excessive power consumption or oscillation - a requirement enforced by its standard CMOS input structure with 10 pF max input capacitance and ±1 µA max input leakage at 6 V.

Key Specifications

Pinout & Package

TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm lead pitch, thin shrink small-outline profile suitable for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC00PWT, SN74HCT00PWR offers native 5 V input compatibility at the cost of marginally higher static current, while MC74HC00ADTR2G delivers identical logic performance in a physically incompatible SOIC package - making SN74HC00PWT the optimal choice for space-constrained, mixed-voltage digital control where TSSOP-14 layout is fixed.

Availability

SN74HC00PWT is available at Aetrix Electronics and suitable for industrial control panels, tamper-detection systems, and S-R latch-based state machines requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for SN74HC00PWT 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 specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in high-reliability logic families.

The SN74HC00PWT belongs to TI's 74HC high-speed CMOS logic series, designed specifically for low-power, wide-supply-range digital interfacing in industrial, automotive, and communications equipment where robustness and interoperability across voltage domains are critical.

FAQ

What is the maximum capacitive load SN74HC00PWT can drive while meeting datasheet timing specifications?

The SN74HC00PWT is characterized to meet all timing and voltage specifications with a total output load capacitance ≤50 pF. Exceeding this value increases propagation delay and transition time nonlinearly; for loads >50 pF, derating curves in the datasheet must be consulted. Layout best practices - such as minimizing trace length and avoiding stubs - help maintain performance near the 50 pF limit. The SN74HC00PWT itself contributes only ~10 pF input capacitance, leaving ~40 pF budget for PCB traces and downstream inputs.

Can unused inputs on SN74HC00PWT be left floating?

No - unused inputs on SN74HC00PWT must never be left floating. Its standard CMOS inputs exhibit high impedance and undefined voltage states when unconnected, which can cause excessive supply current, logic oscillation, or ESD susceptibility. Each unused input must be tied directly to VCC or GND, or via a 10-kΩ pull-up/pull-down resistor. For example, tying 1A and 1B to VCC forces 1Y LOW, safely disabling that gate without affecting others. This requirement applies to all four gates independently.

Does SN74HC00PWT support 3.3 V operation with guaranteed timing performance?

Yes - SN74HC00PWT is fully specified for 3.3 V operation. At VCC = 3.3 V, propagation delay is 15 ns max (typical 9 ns), and output voltage levels meet VOH ≥ 3.15 V and VOL ≤ 0.33 V under 4 mA load. Input thresholds scale accordingly: VIH(min) = 2.0 V and VIL(max) = 0.99 V, ensuring clean interfacing with 3.3 V microcontrollers. All AC and DC parameters in the datasheet include 3.3 V test conditions, confirming full functionality in modern low-voltage systems.

Is SN74HC00PWT pin-compatible with SN74LS00?

No - SN74HC00PWT is not pin-compatible with SN74LS00. While both are quad 2-input NANDs in 14-pin packages, SN74LS00 uses a 14-pin PDIP or SOIC footprint with different pin assignments (e.g., VCC on Pin 14, GND on Pin 7 - same as SN74HC00PWT - but input/output mapping differs in legacy TTL variants). More critically, SN74LS00 uses bipolar TTL technology with different drive strength, input thresholds, and power characteristics. Direct replacement requires verification of logic levels, timing, and loading - SN74HC00PWT is a functional alternative, not a drop-in substitute.

What thermal considerations apply to SN74HC00PWT in continuous operation?

SN74HC00PWT has a junction-to-ambient thermal resistance (RθJA) of 151.7°C/W in its TSSOP-14 (PW) package. At maximum rated supply (6 V) and worst-case output loading, total power dissipation remains below 10 mW per gate - resulting in negligible self-heating (<1°C rise) under typical conditions. No heatsinking is required. However, PCB layout must ensure adequate copper area around GND and VCC pins, and avoid enclosing the device under shields or in sealed enclosures without airflow. Thermal derating is unnecessary unless ambient exceeds +85°C or multiple devices operate simultaneously in dense layouts.