Diodes Incorporated 74HCT08T14-13

Overview

74HCT08T14-13 from Diodes Incorporated is a quadruple 2-input AND gate IC in TSSOP-14 package, operating at 4.5V–5.5V supply, delivering TTL-compatible inputs, 4mA output drive, and 14ns typical propagation delay (CL = 50pF, VCC = 4.5V). It performs Boolean Y = A • B across four independent gates and is used in digital logic interfacing within PC motherboard I/O control and peripheral enable circuitry.

For engineers reviewing the 74HCT08T14-13 datasheet, 74HCT08T14-13 pinout, 74HCT08T14-13 application, or 74HCT08T14-13 equivalent, key selection criteria include input voltage compatibility with legacy TTL systems, guaranteed 4mA sink/source capability at minimum VCC, Schmitt-trigger input noise immunity, and TSSOP-14 footprint suitability for space-constrained embedded control boards.

Technical Context

This device implements four independent non-inverting AND logic functions with push-pull CMOS outputs. Each gate accepts TTL-level inputs (VIH ≥ 2.0V, VIL ≤ 0.8V) and operates across industrial temperature range (–40°C to +125°C) under 4.5–5.5V supply.

It features Schmitt-trigger action on all inputs for enhanced noise rejection, ESD protection exceeding 2kV HBM, and low static current (ICC ≤ 40μA at VCC = 6.0V), enabling reliable use in mixed-signal environments where signal integrity and power efficiency are jointly critical.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9mm × 4.4mm body, 0.65mm pitch, 1.2mm max height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT08DR and 74AHCT08PW,118, the 74HCT08T14-13 offers optimal balance of compact TSSOP-14 footprint, industrial temperature support, and proven noise immunity-making it ideal for volume production in space-constrained consumer and industrial logic interfaces where reliability trumps marginal speed gains.

Availability

74HCT08T14-13 is available at Aetrix Electronics and suitable for PC motherboard I/O control, USB hub power management, and industrial PLC input conditioning requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 74HCT08T14-13 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, specializing in high-reliability, application-optimized components for power management, signal integrity, and logic interface markets.

The 74HCT logic family targets industrial and computing applications requiring TTL-compatible CMOS performance, low power consumption, and robust operation across extended temperature ranges.

FAQ

Can 74HCT08T14-13 operate reliably at 4.2V supply?

No. The recommended minimum supply is 4.5V per datasheet Section 5 (Recommended Operating Conditions). At 4.2V, VOH may fall below 3.7V (guaranteed only ≥3.80V at 4.5V, IOH = –4mA), risking marginal high-level recognition by downstream TTL loads and violating specification limits.

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

No. Unused inputs must be tied to VCC or GND per datasheet Note 6, but internal structure does not require pull-ups. Leaving them floating risks oscillation due to Schmitt-trigger hysteresis and increased ICC; direct connection avoids undefined states and EMI generation.

Is the TSSOP-14 package suitable for reflow soldering per IPC-J-STD-020?

Yes. Diodes' TSSOP-14 (package code T14) is rated for standard lead-free reflow profiles (peak 260°C, 20–40 sec above 217°C), matching IPC-J-STD-020D Level 3 requirements. Suggested pad layout is provided in AP02001 with X = 0.45mm, Y = 1.45mm dimensions.

How does the Schmitt-trigger input affect timing analysis?

Schmitt-trigger inputs introduce asymmetric switching thresholds (e.g., VIH ≈ 2.0V, VIL ≈ 0.5V), increasing effective input hysteresis. This improves noise margin but adds minor delay variation (±1ns) depending on input slew rate-designers must use worst-case tPD values (36ns max at –40°C to +125°C) in timing closure.