Diodes Incorporated 74AHCT00S14-13

Overview

74AHCT00S14-13 from Diodes Incorporated is a quad 2-input NAND gate IC in SO-14 package, operating at 4.5V–5.5V supply, delivering 8mA output drive, TTL-compatible inputs, and Schmitt-trigger input action for noise immunity. It performs Boolean Y = A·B across four independent gates and is used in PC motherboard logic control, peripheral interface signal conditioning, and digital set-top box timing coordination.

For engineers reviewing the 74AHCT00S14-13 datasheet, 74AHCT00S14-13 pinout, 74AHCT00S14-13 application, or 74AHCT00S14-13 equivalent, key selection criteria include propagation delay (≤9.0 ns @ CL=50pF), input voltage thresholds (VIH ≥2.0V, VIL ≤0.8V), output drive capability (±8mA), power dissipation per gate (14.8 pF typical), and SO-14 thermal and mounting compatibility.

Technical Context

This device implements four independent, non-inverting NAND logic functions with push-pull CMOS outputs. Each gate features Schmitt-trigger inputs to reject noise on slow-rising or noisy signals, and operates within industrial temperature range (−40°C to +125°C) under 4.5V–5.5V supply.

It complies with JESD 22 ESD standards (2 kV HBM, 1 kV CDM, 200 V MM) and JESD 78 latch-up immunity (>250 mA). Input clamp current is ±20 mA, and absolute max VCC is 7.0 V - enabling robust interfacing with legacy TTL and mixed-voltage systems.

Key Specifications

Pinout & Package

74AHCT00S14-13 is housed in a 14-pin Small Outline (SO-14) package with 1.27 mm pitch, 8.53–8.74 mm body length, and 3.80–3.99 mm width. It features gull-wing leads, surface-mount compatibility, and JEDEC MS-012AC outline compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT00DR and 74VHC00M, the 74AHCT00S14-13 uniquely combines guaranteed Schmitt-trigger inputs, full TTL compatibility, and industry-leading ESD robustness - making it optimal for noise-critical 5V logic interfacing where signal integrity and long-term reliability are prioritized over ultra-low voltage operation or marginal cost savings.

Availability

74AHCT00S14-13 is available at Aetrix Electronics and suitable for PC motherboard control logic, optical drive interface design, and digital TV set-top box development requiring stable component supply, consistent SO-14 footprint availability, and long-term industrial lifecycle support.

Supply support for 74AHCT00S14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The 74AHCT logic family targets industrial, computing, and consumer applications requiring robust 5V logic with enhanced noise immunity, ESD tolerance, and drop-in compatibility with legacy TTL systems.

FAQ

Is 74AHCT00S14-13 compatible with 3.3V logic systems?

No - it is designed exclusively for 4.5V–5.5V operation. Its VIH minimum is 2.0V, but input thresholds and output swing are optimized for 5V rails. Interfacing with 3.3V systems requires level translation or a 3.3V-compatible logic family like 74LVC.

Does this device require external pull-up or pull-down resistors on unused inputs?

Yes - per datasheet recommendation, all unused inputs must be tied to either VCC or GND to prevent floating nodes, which could cause excessive ICC, oscillation, or increased EMI. Leaving inputs unconnected violates recommended operating conditions and risks functional instability.

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

It is characterized up to 50 pF (tPD tested at CL = 15 pF and 50 pF). Driving >50 pF may increase propagation delay nonlinearly and risk output rise/fall time degradation. For >50 pF loads, add a series resistor or buffer stage to maintain timing integrity.

Can 74AHCT00S14-13 replace older 74LS00 in existing designs?

Yes - it offers pin-for-pin compatibility, identical logic function, and TTL-compatible inputs. However, its CMOS output structure provides symmetrical drive strength (±8mA vs. LS's asymmetrical 0.4mA/8mA), enabling better signal integrity and reduced ground bounce in dense layouts.