Nexperia USA Inc. 74HCT03DB,118

Overview

74HCT03DB,118 from Nexperia is a quad 2-input NAND gate IC with open-drain outputs, designed for wired-AND logic, level translation, and bus interface applications. It operates at 4.5 V to 5.5 V, delivers TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), supports -40 °C to +125 °C ambient range, and features 12 ns typical propagation delay at VCC = 4.5 V with CL = 50 pF.

For engineers reviewing the 74HCT03DB,118 datasheet, 74HCT03DB,118 pinout, 74HCT03DB,118 application, or 74HCT03DB,118 equivalent, key selection criteria include open-drain output drive capability (IO = −25 mA), input clamp diode support for overvoltage-tolerant interfacing, CMOS power efficiency (<2 μA ICC at 25 °C), and SO14 package compatibility with legacy 74-series footprint layouts.

Technical Context

This device implements four independent NAND gates, each with true open-drain outputs requiring external pull-up resistors-enabling flexible voltage translation between 3.3 V and 5 V domains. Input clamp diodes allow safe connection of inputs to voltages exceeding VCC when used with current-limiting resistors.

Its TTL-level input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V) ensure direct compatibility with legacy 5 V TTL logic families, while its CMOS output stage provides rail-to-rail low-state sinking (VOL ≤ 0.26 V at IO = 4.0 mA) and high-impedance OFF-state (IOZ ≤ ±0.5 μA).

Key Specifications

Pinout & Package

74HCT03DB,118 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad NAND gate with open-drain output applications.

Compared with 74HCT03DB,118, the 74HCT03D,653 lacks extended temperature support critical for harsh environments, while the SN74LVC03APW offers better power efficiency and density but sacrifices 5 V interoperability and TTL input compatibility.

Availability

74HCT03DB,118 is available at Aetrix Electronics and suitable for industrial bus interface, I²C signal conditioning, LED matrix row driving, and reset signal combining requiring stable component supply across extended temperature ranges.

Supply support for 74HCT03DB,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 delivering high-performance logic, analog, and MOSFET solutions with emphasis on reliability, efficiency, and manufacturability for industrial and automotive markets.

The 74HCT03 belongs to Nexperia's 74HCT logic family-designed specifically to bridge TTL and CMOS domains with pin-compatible replacements offering robust noise immunity, wide supply tolerance, and extended temperature operation.

FAQ

Can 74HCT03DB,118 be used with a 3.3 V supply?

No. The 74HCT03DB,118 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds require minimum VIH = 2.0 V, which is not guaranteed below VCC = 4.5 V. For 3.3 V systems, use the 74LVC03 or 74AHC03 variants instead.

What pull-up resistor value should be used with the open-drain outputs?

A 10 kΩ resistor to 5 V is typical for general-purpose logic interfacing, yielding ~0.5 mA static current and <10 ns rise time with 50 pF load. For higher-speed or higher-current applications (e.g., driving LEDs), values from 1 kΩ to 4.7 kΩ are appropriate-always verify VOL ≤ 0.4 V at the required sink current per datasheet Table 6.

Does this device support hot insertion or live swapping?

No. The 74HCT03DB,118 lacks explicit hot-swap protection features such as power-up/down sequencing control or Ioff partial-power-down mode. Its input clamp diodes provide limited overvoltage tolerance, but uncontrolled insertion into a live 5 V bus may cause transient latch-up or excessive current flow through clamps.

How does the open-drain configuration affect propagation delay measurements?

Propagation delay (tpd) is measured from input transition to output voltage crossing 0.1 × VCC for falling edges (tPLZ) or 0.5 × VCC for rising edges (tPZL), per Figure 4. Since rising edges depend entirely on external RC time constant, tPZL varies with pull-up value and load capacitance-only tPLZ is process- and voltage-dependent and thus tightly specified (12 ns typ at VCC = 4.5 V).