Nexperia USA Inc. 74HCT112D,652

Overview

74HCT112D,652 from Nexperia is a dual J-K flip-flop with individual Set and Reset inputs, positive-edge triggering, and 5V TTL-compatible CMOS logic. It operates from 4.5 V to 5.5 V, features typical propagation delay of 18 ns at 5 V, and supports fan-out of 10 LSTTL loads. It is used in synchronous counters and state-machine control circuits.

For engineers reviewing the 74HCT112D,652 datasheet, 74HCT112D,652 pinout, 74HCT112D,652 application, or 74HCT112D,652 equivalent, key selection criteria include edge-triggering polarity, independent asynchronous reset/set capability, supply voltage tolerance, propagation delay budget, and LSTTL drive compatibility in legacy digital systems.

Technical Context

This device implements two independent negative-edge-triggered J-K flip-flops in a single SO16 package. Each section includes active-low asynchronous Set (SD) and Reset (RD) inputs that override clock action, and complementary Q and Q̅ outputs. The J and K inputs control toggle, set, reset, or hold states on the rising edge of the clock signal.

Logic levels conform to HCT family specifications: VIH = 2.0 V min, VIL = 0.8 V max, ensuring interoperability with standard TTL outputs. Input clamp diodes and ESD protection per IEC61000-4-2 (4 kV contact) support robust board-level integration in industrial control modules.

Key Specifications

Pinout & Package

Package: SO16 (Small Outline, 16-pin, 150 mil width, 1.27 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT112DR and 74HC112D,653, the 74HCT112D,652 uniquely balances TTL compatibility, low static current, and industrial ESD robustness - making it optimal for retrofitting legacy 5 V control hardware without redesign.

Availability

74HCT112D,652 is available at Aetrix Electronics and suitable for industrial counter modules, legacy bus interface logic, and power sequencing controllers requiring stable component supply and long-term manufacturability.

Supply support for 74HCT112D,652 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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer applications.

The 74HCT series targets 5 V mixed-signal systems needing TTL-compatible CMOS performance, emphasizing robustness, predictable timing, and drop-in replacement capability for obsolete bipolar logic.

FAQ

Is the 74HCT112D,652 compatible with 3.3 V microcontroller GPIOs?

No. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) are designed for 5 V TTL sources. Direct connection to 3.3 V GPIO may cause unreliable logic recognition due to insufficient VIH margin. A level shifter or buffer is required for safe interfacing.

Can both flip-flop sections operate independently with different clocks?

Yes. Section A (pins 1–6) and Section B (pins 10–15) have separate clock inputs (CLK1 and CLK2). They share only VCC and GND, allowing fully independent timing domains - useful for dual-channel event capture or asymmetric state machines.

What is the maximum clock frequency supported?

The device supports reliable operation up to 25 MHz under standard conditions (VCC = 5 V, TA = 25 °C), based on its 18 ns typical propagation delay and setup/hold time requirements. Derating applies above 70 °C ambient.

Does the 74HCT112D,652 include Schmitt-trigger inputs?

No. It uses standard CMOS input buffers without hysteresis. For noisy clock or control lines, external RC filtering or a dedicated Schmitt-trigger buffer (e.g., 74HCT14) is recommended before the CLK, SD, or RD inputs.