Nexperia USA Inc. 74VHCT08D,118

Overview

74VHCT08D,118 from Nexperia is a quad 2-input AND gate IC in SO14 (SOT108-1) package, operating at 4.5–5.5 V supply with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), 7.5 ns typical propagation delay (CL = 50 pF, VCC = 5 V), and rated for -40 °C to +125 °C industrial temperature range. It serves as a level-translating logic combiner in digital control buses and interface signal conditioning.

For engineers reviewing the 74VHCT08D,118 datasheet, 74VHCT08D,118 pinout, 74VHCT08D,118 application, or 74VHCT08D,118 equivalent, key selection criteria include TTL-level input compatibility, SO14 thermal performance (Ptot = 500 mW @ ≤100 °C), guaranteed 8 mA output drive, Schmitt-trigger input noise immunity, and JEDEC JESD7-A compliance for LSTTL pin compatibility.

Technical Context

The 74VHCT08D,118 implements four independent 2-input AND gates using high-speed Si-gate CMOS technology with TTL-level input thresholds-ensuring direct replacement of legacy 74LS08 without level-shifting circuitry. Its inputs accept voltages up to 7.0 V independent of VCC, and all inputs feature Schmitt-trigger action for noise rejection on slow or noisy signals.

Propagation delays are balanced across all four gates (tpd = 1.0–10.0 ns over temperature and voltage), and output stages deliver symmetrical ±8 mA drive capability at VOH ≥ 3.7 V and VOL ≤ 0.55 V under full load-enabling reliable fanout to multiple CMOS or TTL inputs in mixed-logic systems.

Key Specifications

Pinout & Package

74VHCT08D,118 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, and gull-wing leads compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74VHC08D,118 and SN74LS08DR, the 74VHCT08D,118 uniquely bridges TTL input compatibility with CMOS efficiency-delivering LSTTL pin replacement without sacrificing speed, power, or ruggedness in modern mixed-signal designs.

Availability

74VHCT08D,118 is available at Aetrix Electronics and suitable for industrial motor control, automated test equipment, programmable logic controller I/O expansion, and legacy bus interface translation requiring stable component supply across extended temperature ranges.

Supply support for 74VHCT08D,118 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

Nexperia is a leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing infrastructure focused on reliability and scalability.

The 74VHCT08D,118 belongs to Nexperia's VHCT logic family-designed specifically for seamless migration from bipolar TTL to low-power CMOS while preserving pinout, voltage thresholds, and system timing behavior.

FAQ

What is the maximum input voltage the 74VHCT08D,118 can tolerate?

The 74VHCT08D,118 inputs tolerate up to +7.0 V regardless of VCC level, as specified in Table 4 (Limiting Values). This overvoltage capability allows safe interfacing with 5 V or higher-voltage sensors, switches, or legacy buses without clamping diodes or resistive dividers-provided input current remains within ±20 mA limits.

Does the 74VHCT08D,118 require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be tied directly to VCC or GND. The device does not require external pull-up/pull-down resistors because its inputs have defined logic thresholds and negligible leakage (II ≤ 2.0 μA max). Leaving inputs floating is prohibited, as it risks metastability and increased ICC due to undefined input states.

Can the 74VHCT08D,118 operate reliably at 3.3 V supply?

No. The 74VHCT08D,118 is specified only for VCC = 4.5–5.5 V (Table 5). At 3.3 V, VIH minimum (2.0 V) is met, but VOH drops below TTL HIGH-level requirements and propagation delay increases beyond specification-making it non-compliant with TTL interface standards and unsupported per datasheet operating conditions.

How does the Schmitt-trigger input improve noise immunity in real-world applications?

Schmitt-trigger inputs provide ≈0.3 V hysteresis between rising and falling thresholds, preventing multiple transitions on slowly changing or noisy signals-such as mechanical switch closures, thermistor-based sensor outputs, or long PCB traces in industrial environments. This eliminates need for external RC filtering or debounce firmware, reducing BOM count and improving system response predictability.