Nexperia USA Inc. 74HC73PW,118

Overview

74HC73PW,118 from Nexperia is a dual negative-edge-triggered JK flip-flop with asynchronous reset, designed for synchronous logic sequencing and state storage in digital control systems. It features two independent flip-flops (FF1 and FF2), each with J/K data inputs, nCP clock (HIGH-to-LOW edge-triggered), nR asynchronous reset (active LOW), and complementary nQ/nQ outputs. Operates across 2.0–6.0 V supply at temperatures up to +125 °C, supporting industrial timing and register applications.

For engineers reviewing the 74HC73PW,118 datasheet, 74HC73PW,118 pinout, 74HC73PW,118 application, or 74HC73PW,118 equivalent, key selection criteria include negative-edge clocking behavior, guaranteed setup/hold timing (e.g., tsu = 3 ns @ VCC = 6.0 V), asynchronous reset propagation delay (tPHL ≤ 41 ns), and TSSOP14 package compatibility with high-density PCB layouts.

Technical Context

This device implements two independent CMOS JK flip-flops sharing no internal coupling-each operates with fully separate J, K, nCP, and nR signals. The Schmitt-trigger clock input ensures robust operation with slow-rising/falling edges, while clamp diodes on all inputs allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Functionally, it supports four modes per flip-flop: toggle (J=K=H), set (J=H,K=L), reset (J=L,K=H), and hold (J=K=L), all synchronized to the HIGH-to-LOW clock transition. Asynchronous reset overrides clock and data, forcing nQ = L and nQ = H regardless of other inputs.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14-pin surface-mount with 0.65 mm pitch, 4.4 mm body width, and exposed pad not present - optimized for automated placement and thermal performance in compact digital logic modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual JK flip-flop applications.

Compared with SN74HC73DR and 74HCT73PW,118, the 74HC73PW,118 delivers optimal density and thermal performance in space-constrained industrial PCBs, while maintaining full functional equivalence and broader supply flexibility than the HCT variant.

Availability

74HC73PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, digital power supply sequencing, motor control logic state machines, and legacy bus interface glue logic requiring stable component supply across extended temperature ranges.

Supply support for 74HC73PW,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 74HC73 belongs to Nexperia's 74HC logic family - engineered for low-power, wide-voltage digital control in harsh environments, with focus on timing predictability and long-term supply stability.

FAQ

What is the minimum recommended VCC for reliable operation of 74HC73PW,118?

The device is specified down to 2.0 V per JEDEC JESD7A, with guaranteed functionality including setup/hold timing and output drive strength. At 2.0 V, maximum clock frequency drops to 625 kHz (not MHz), and propagation delay increases to 240 ns. For stable 10+ MHz operation, VCC ≥ 4.5 V is recommended.

Can 74HC73PW,118 be used with 3.3 V microcontroller GPIOs without level shifting?

Yes - its input thresholds scale with VCC: VIH(min) = 2.1 V and VIL(max) = 1.35 V at VCC = 4.5 V, and VIH(min) = 1.5 V at VCC = 2.0 V. When powered at 3.3 V, VIH(min) ≈ 2.3 V, comfortably above typical 3.3 V GPIO HIGH levels (~3.0–3.3 V), making direct interfacing safe and robust.

Is the reset function truly asynchronous across the full temperature range?

Yes - the nR input operates asynchronously across -40 °C to +125 °C, with propagation delay tPHL specified from 14 ns (VCC = 6.0 V) to 220 ns (VCC = 2.0 V). No clock dependency exists; assertion of nR = LOW forces nQ = LOW and nQ = HIGH within these bounds regardless of nCP state or timing.

Does the TSSOP14 package (SOT402-1) require special PCB layout considerations?

Yes - due to its 0.65 mm lead pitch and gull-wing leads, ensure 0.25 mm minimum solder mask dams between pads, 0.20 mm stencil aperture reduction for controlled paste volume, and thermal relief on GND/VCC pads to prevent tombstoning. IPC-7351B footprint SOT402-1 is mandatory for reliable reflow yield.