NXP Semiconductors 74HCT30DB,118

Overview

74HCT30DB,118 from Nexperia is an 8-input NAND gate logic IC with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), operating from 4.5 V to 5.5 V, delivering 4.32 V VOH at -4.0 mA and 0.26 V VOL at 4.0 mA, and rated for -40 °C to +125 °C industrial/automotive ambient operation. It implements a single positive-logic NAND function in a 14-lead SSOP package (SOT337-1), used for bus arbitration, enable control, and address decoding in digital systems.

For engineers reviewing the 74HCT30DB,118 datasheet, 74HCT30DB,118 pinout, 74HCT30DB,118 application, or 74HCT30DB,118 equivalent, key selection criteria include TTL-level input compatibility, guaranteed output drive strength across temperature, propagation delay stability (16–42 ns over -40 °C to +125 °C), SO/TSSOP/SSOP package footprint compatibility, and latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Technical Context

The 74HCT30DB,118 implements a single 8-input NAND gate using silicon-gate CMOS technology with buffered TTL-compatible input stages. Its inputs feature internal clamp diodes enabling safe interfacing to voltages beyond VCC when current-limiting resistors are used.

It operates under JEDEC-compliant conditions (JESD8C and JESD7A), supports dynamic power calculation via CPD = 15 pF, and maintains defined VIH/VIL thresholds independent of VCC variation within 4.5–5.5 V - ensuring robust noise margin against TTL-family drivers and receivers.

Key Specifications

Pinout & Package

74HCT30DB,118 is housed in a 14-lead SSOP package (SOT337-1), 5.3 mm × 6.2 mm body, 0.65 mm lead pitch, with gull-wing leads and moisture sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-input NAND gate applications.

Compared with 74HCT30DB,118, the SO14 variant offers mechanical robustness and legacy compatibility, while the TSSOP alternative delivers superior thermal performance and smaller PCB area - choice depends on assembly method, thermal budget, and footprint constraints rather than logic functionality.

Availability

74HCT30DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, legacy system bus arbitration, and medical diagnostic equipment control logic requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT30DB,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 global semiconductor expert headquartered in Nijmegen, Netherlands, specializing in high-volume production of logic, analog, discrete, and MOSFET devices with ISO/TS 16949-certified manufacturing.

The 74HCT series targets industrial and automotive applications requiring TTL-compatible logic with enhanced noise immunity, wide temperature operation, and robust ESD/latch-up performance - designed specifically for reliability-critical digital interface and control functions.

FAQ

What is the maximum clock frequency supported by the 74HCT30DB,118?

The 74HCT30DB,118 is a combinational logic device with no internal clock; its usable toggle rate depends on propagation delay and system-level timing margins. With tpd ≤ 42 ns (max) and tt ≤ 22 ns (max), it supports reliable operation in asynchronous logic paths up to approximately 10 MHz under worst-case loading and temperature conditions - verified via CL = 50 pF test setup per datasheet Figure 5.

Can 74HCT30DB,118 safely interface with 3.3 V logic inputs?

No - the 74HCT30DB,118 requires VCC = 4.5–5.5 V and has TTL-level input thresholds (VIH ≥ 2.0 V). While a 3.3 V HIGH signal may register as valid in some cases, it violates the guaranteed VIH minimum (2.0 V) under worst-case temperature and process corners. A level shifter or 74LVC-series buffer is required for reliable 3.3 V → 5 V interfacing.

Is the 74HCT30DB,118 pin-compatible with the 74HC30DB,118?

No - although both share the same pinout configuration, the 74HC30DB,118 uses CMOS-level inputs (VIH ≥ 3.15 V at VCC = 4.5 V), whereas the 74HCT30DB,118 uses TTL-level inputs (VIH ≥ 2.0 V). Swapping them risks incorrect logic interpretation when driven by legacy TTL sources, especially at elevated temperatures or low VCC.

Does 74HCT30DB,118 require external pull-up or pull-down resistors on unused inputs?

Yes - all eight inputs (A–H) must be actively driven HIGH or LOW; floating inputs cause increased ICC, unpredictable output states, and potential oscillation due to CMOS input stage metastability. Unused inputs should be tied directly to VCC or GND - not left open - to ensure static power consumption remains below 40 μA and prevent noise-induced switching.