Nexperia USA Inc. 74AHCT30D,112

Overview

74AHCT30D,112 from Nexperia is an 8-input NAND gate in SO14 (SOT108-1) package, designed for TTL-level input compatibility and high-speed logic interfacing in industrial control and embedded digital systems. It operates from 4.5 V to 5.5 V, delivers propagation delay as low as 3.3 ns (CL = 15 pF), supports -40 °C to +125 °C ambient range, and features Schmitt-trigger inputs for noise immunity.

For engineers reviewing the 74AHCT30D,112 datasheet, 74AHCT30D,112 pinout, 74AHCT30D,112 application, or 74AHCT30D,112 equivalent, this device serves as a robust, pin-compatible replacement for legacy LSTTL 8-input NAND functions while enabling CMOS-level power efficiency and rail-to-rail output swing in mixed-signal board designs.

Technical Context

The 74AHCT30D implements a single 8-input NAND logic function with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) and CMOS-compatible output drive (VOH ≥ 3.7 V, VOL ≤ 0.55 V at IO = ±8 mA). All eight inputs include Schmitt-trigger action to suppress input noise and support slow-rising signals.

It complies with JEDEC Standard No. 7-A and integrates ESD protection exceeding 2000 V HBM and 1000 V CDM. The SO14 package (SOT108-1) provides 14 leads, 3.9 mm body width, and thermal performance rated for continuous operation up to +125 °C ambient.

Key Specifications

Pinout & Package

74AHCT30D,112 uses the SO14 plastic small outline package (SOT108-1), 14-lead, 3.9 mm body width, with gull-wing leads and pin 1 index located at lower-left corner below marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHC30D,112 and SN74LS30N, the 74AHCT30D,112 uniquely balances TTL input compatibility, sub-4 ns propagation, and industrial temperature resilience-making it optimal for new designs where interoperability with legacy logic and modern power efficiency are both required.

Availability

74AHCT30D,112 is available at Aetrix Electronics and suitable for industrial control logic, embedded system bus arbitration, digital power sequencing, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74AHCT30D,112 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 focused on essential semiconductors, delivering high-performance logic, analog, and MOSFET solutions with emphasis on reliability and energy efficiency.

The 74AHCT30D belongs to Nexperia's advanced logic family, engineered specifically for seamless TTL-to-CMOS bridging in industrial and automotive-adjacent applications demanding robustness and precise timing.

FAQ

What is the maximum input voltage the 74AHCT30D,112 can tolerate?

The absolute maximum input voltage is +7.0 V referenced to GND, per Table 5. This allows safe interfacing with 5 V systems even during transient overvoltage events, provided input current remains within ±20 mA clamping limits. Operation above VCC is permitted but not recommended for sustained use.

Does the 74AHCT30D,112 require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs (Pins 9, 10, 13) are internally unconnected (n.c.), and all eight functional inputs have Schmitt-trigger action with defined VIH/VIL thresholds. Leaving unused inputs floating is acceptable, though tying them to VCC or GND is permissible for noise margin improvement.

Can the 74AHCT30D,112 operate reliably at 3.3 V supply?

No. The 74AHCT30D variant is specified only for 4.5 V to 5.5 V operation (Table 6). At 3.3 V, input thresholds fall outside TTL specification, and output drive degrades significantly. For 3.3 V systems, select the 74AHC30D,112 variant instead.

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

Schmitt-trigger inputs provide hysteresis (typically 0.4–0.6 V), meaning the rising and falling input thresholds differ. This prevents multiple toggles on slow-rising or noisy signals-such as those from long PCB traces, unshielded sensors, or relay contacts-ensuring clean, single-edge transitions at the output.