Nexperia USA Inc. 74HCT03D,653

Overview

74HCT03D,653 from Nexperia is a quad 2-input NAND gate IC with open-drain outputs, designed for level-shifting and wired-AND bus interfacing in mixed-voltage digital systems. It operates from 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 operation, and features 4 independent gates in SO14 package - used in I²C bus pull-up control and microcontroller GPIO expansion.

For engineers reviewing the 74HCT03D,653 datasheet, 74HCT03D,653 pinout, 74HCT03D,653 application, or 74HCT03D,653 equivalent, this page provides verified functional behavior, validated pin mapping, confirmed temperature and voltage operating margins, and real-world interface use cases - not generic logic gate descriptions.

Technical Context

This device implements four independent 2-input NAND functions with open-drain outputs, enabling wired-logic configurations such as I²C, SMBus, and interrupt bus sharing. Each output requires an external pull-up resistor to define HIGH-level voltage and current sourcing capability.

Input thresholds are TTL-compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V), ensuring direct interfacing with legacy 5 V TTL logic families without level shifters. Propagation delay is 12 ns (typ) to 36 ns (max) at VCC = 4.5 V and CL = 50 pF, with transition time under 22 ns (max).

Key Specifications

Pinout & Package

74HCT03D,653 is housed in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, surface-mountable with gull-wing leads.

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 74HCT03D,653, the 74HCT03PW,118 offers identical functionality in a smaller package, while SN74LVC03APWR trades voltage flexibility for speed and density - making the SO14 variant optimal for legacy 5 V bus integration and thermal stability in industrial ambient conditions.

Availability

74HCT03D,653 is available at Aetrix Electronics and suitable for I²C bus design, microcontroller GPIO expansion, industrial interrupt arbitration, and legacy system interface adaptation requiring stable component supply across extended temperature ranges.

Supply support for 74HCT03D,653 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 efficiency technologies, delivering high-performance logic, analog, and discrete components for industrial, automotive, and consumer applications.

The 74HCT03D,653 belongs to Nexperia's 74HCT logic family - engineered for TTL-compatible interfacing in mixed-voltage digital systems, emphasizing robustness, wide temperature operation, and bus-friendly open-drain architecture.

FAQ

What is the maximum sink current per output of the 74HCT03D,653?

The 74HCT03D,653 guarantees a minimum sink current of −4.0 mA per output while maintaining VOL ≤ 0.4 V at VCC = 4.5 V and Tamb = +25 °C. At −40 °C to +125 °C, the guaranteed sink capability remains −4.0 mA with VOL ≤ 0.4 V, as specified in Table 6 of the datasheet.

Can the 74HCT03D,653 be used with a 3.3 V supply?

No - the 74HCT03D,653 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds (VIH ≥ 2.0 V) and internal design require minimum VCC = 4.5 V to ensure correct logic interpretation and output drive strength. Using 3.3 V violates recommended operating conditions and risks unreliable switching.

Is the 74HCT03D,653 pin-compatible with the 74HC03D variant?

Yes - both share identical SO14 pinout (SOT108-1), same terminal numbering, and identical logic function. However, 74HC03D uses CMOS input thresholds (VIH = 3.15 V min at VCC = 4.5 V), whereas 74HCT03D uses TTL thresholds (VIH = 2.0 V min), making them electrically distinct despite mechanical compatibility.

Does the 74HCT03D,653 support hot-swap or live-insertion?

No - the device lacks built-in hot-swap protection circuitry. While input clamp diodes permit limited overvoltage tolerance with current limiting, the datasheet does not specify hot-swap qualification. Safe insertion requires power sequencing where VCC is stable before applying input signals, per JEDEC JESD78 latch-up immunity guidelines.