NXP Semiconductors 74HC283D/AUJ

Overview

74HC283D/AUJ from NXP Semiconductors (formerly Philips) is a 4-bit binary full adder with fast internal look-ahead carry, operating across 2.0–6.0 V supply and −40 °C to +125 °C ambient range. It performs parallel addition of two 4-bit words plus carry-in (CIN), delivering sum outputs S1–S4 and carry-out (COUT), and supports both active-HIGH and active-LOW logic configurations in digital arithmetic units.

For engineers reviewing the 74HC283D/AUJ datasheet, 74HC283D/AUJ pinout, 74HC283D/AUJ application, or 74HC283D/AUJ equivalent, this device is selected for high-speed combinational arithmetic, cascaded multi-bit addition, and logic-level encoding/majority gate implementations where propagation delay (e.g., 23 ns CIN→S4 at 5 V/15 pF) and low static power (≤160 µA ICC at 6 V, −40 °C to +125 °C) are critical.

Technical Context

The 74HC283D/AUJ implements a fully synchronous 4-bit binary full adder using Si-gate CMOS technology compliant with JEDEC standard no. 7A. Its internal look-ahead carry logic eliminates ripple-carry bottlenecks, enabling deterministic timing between operand inputs (A1–A4, B1–B4), carry input (CIN), and outputs (S1–S4, COUT).

It supports dual logic polarity: all-active-HIGH operation (standard positive logic) or all-active-LOW operation (negative logic), with output interpretation matching input polarity. Pin assignments are symmetric-inputs of equal weight (e.g., CIN, A1, B1) may be interchanged without functional impact.

Key Specifications

Pinout & Package

74HC283D/AUJ is housed in a plastic small outline package (SO16), 16-lead, 3.9 mm body width (SOT109-1), with gull-wing leads and standard JEDEC MO-153-compatible footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit binary full adder applications.

Compared with SN74HC283N and 74HCT283D, the 74HC283D/AUJ delivers optimal surface-mount integration, lowest quiescent current in extended temperature range, and native CMOS input compatibility-making it the preferred choice for modern high-density, low-power digital systems.

Availability

74HC283D/AUJ is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC283D/AUJ 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

NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance analog and logic ICs, with core expertise in automotive, industrial, and secure connectivity solutions.

The 74HC283D/AUJ belongs to the 74HC high-speed CMOS logic family, designed specifically for low-power, pin-compatible replacements of legacy TTL arithmetic functions in space-constrained and thermally demanding environments.

FAQ

What logic families is the 74HC283D/AUJ compatible with?

The 74HC283D/AUJ is electrically compatible with standard CMOS and 74LSTTL logic families due to its JEDEC Std. 7A compliance and pin-for-pin equivalence with LSTTL devices. Its CMOS inputs accept VIH ≥ 3.15 V (at VCC = 4.5 V) and VIL ≤ 1.35 V, ensuring reliable interfacing with 3.3 V and 5 V systems without level shifters.

Can the 74HC283D/AUJ operate with a 3.3 V supply?

Yes, the 74HC283D/AUJ operates over 2.0 V to 6.0 V, including 3.3 V nominal supplies. At VCC = 3.3 V, typical propagation delay is ~28 ns (CIN→S4, CL = 15 pF), and VOH/VOL remain rail-aligned-enabling direct connection to 3.3 V FPGAs, microcontrollers, and memory interfaces without translation.

How is carry chaining implemented between multiple 74HC283D/AUJ devices?

Carry chaining uses direct pin-to-pin wiring: COUT of one 74HC283D/AUJ connects to CIN of the next stage. No external logic is needed-the internal look-ahead architecture ensures correct sum generation across stages. For an 8-bit adder, S1–S4 from the first device and S1–S4 from the second (with COUT of first driving CIN of second) yield full 8-bit result.

Does the 74HC283D/AUJ support negative logic (active-LOW) operation?

Yes, the 74HC283D/AUJ fully supports active-LOW operation: all inputs (A1–A4, B1–B4, CIN) and outputs (S1–S4, COUT) are interpreted as active-LOW. In this mode, a logic LOW represents binary '1', and the function remains mathematically identical-verified by the provided active-LOW function table (Table 4).

What is the maximum clock rate achievable when using the 74HC283D/AUJ in a synchronous adder chain?

The 74HC283D/AUJ is combinational-not clocked-so it has no inherent clock rate. However, its worst-case propagation delay (CIN→S4 = 23 ns at 5 V/15 pF) sets the minimum cycle time for pipelined arithmetic. In cascaded configurations, total latency scales linearly: two stages yield ≤46 ns, enabling effective throughput up to ~21 MHz for continuous 4-bit additions.