Texas Instruments CD74HC107E

Overview

CD74HC107E from Texas Instruments is a dual J-K flip-flop with asynchronous reset, negative-edge clock triggering, complementary Q/Q outputs, and buffered inputs. It operates from 2V to 6V, delivers 60MHz max frequency at 5V/15pF, supports -55°C to +125°C industrial/military temperature range, and drives 10 LSTTL loads. It is used in synchronous logic control, state machines, and clock-domain synchronization circuits.

For engineers reviewing the CD74HC107E datasheet, CD74HC107E pinout, CD74HC107E application, or CD74HC107E equivalent, this page provides verified functional identity, validated PDIP-14 package mapping, confirmed timing parameters (tPLH/tPHL ≤51ns @5V/15pF), noise immunity specs (NIL/NIH = 30% of VCC), and two rigorously validated alternative parts for logic design reuse.

Technical Context

The CD74HC107E implements two independent edge-triggered J-K flip-flops sharing no internal logic-each with dedicated J, K, clock (CP), and asynchronous reset (R) inputs plus Q and Q̅ outputs. State transition occurs only on the high-to-low clock edge; reset overrides clock and forces Q = LOW regardless of J/K state.

It uses silicon-gate CMOS technology to achieve LSTTL-compatible speed with CMOS power efficiency. Hysteresis on CP inputs improves noise immunity and allows slower input rise/fall times (up to 1000ns at 2V), while balanced propagation delay ensures minimal skew between Q and Q̅ transitions.

Key Specifications

Pinout & Package

CD74HC107E is housed in a 14-lead plastic dual in-line package (PDIP), 0.300-inch wide body, with standard through-hole mounting and JEDEC MS-001 compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HC107E, CD74HCT107E offers guaranteed 5V TTL interoperability but sacrifices wide-voltage flexibility, while SN74HC109N provides preset capability and positive-edge operation at the cost of non-interchangeable pinout and distinct control logic behavior.

Availability

CD74HC107E is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, test instrumentation, and military communications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HC107E 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability logic families.

The CD74HC107E belongs to TI's HC-series high-speed CMOS logic product line, designed for drop-in replacement of legacy TTL in industrial, military, and aerospace systems demanding low power, wide voltage operation, and extended temperature performance.

FAQ

What is the maximum operating frequency of the CD74HC107E?

The CD74HC107E achieves a maximum clock frequency of 60 MHz under specified conditions: VCC = 5V, CL = 15pF, TA = 25°C. At wider temperature extremes (-55°C to +125°C), the guaranteed fMAX drops to 4 MHz at 2V and 23 MHz at 6V per datasheet switching specifications. This makes the CD74HC107E suitable for medium-speed synchronous logic where deterministic edge-triggered behavior is critical.

Does the CD74HC107E support asynchronous reset on both flip-flops?

Yes, the CD74HC107E provides independent asynchronous active-low reset inputs for each of its two J-K flip-flops: pin 3 (1R) controls FF1 and pin 12 (2R) controls FF2. Asserting either reset input forces the corresponding Q output LOW immediately, regardless of clock state or J/K values-enabling isolated initialization without affecting the other flip-flop's state.

What package type is used for the CD74HC107E?

The CD74HC107E is supplied in a 14-lead plastic dual in-line package (PDIP), designated as package type N per TI's packaging nomenclature. Its dimensions conform to JEDEC MS-001, with 0.300-inch body width, 0.100-inch lead pitch, and through-hole mounting compatibility. The device marking "CD74HC107E" appears on the top surface.

Can the CD74HC107E operate at 3.3V supply voltage?

Yes, the CD74HC107E is fully specified for operation from 2V to 6V, including 3.3V nominal systems. At VCC = 3.3V, it maintains valid logic thresholds (VIH ≥ 2.1V, VIL ≤ 1.1V), delivers tPLH/tPHL ≤ 65ns (CL = 50pF), and sustains fanout of 10 LSTTL loads. This makes the CD74HC107E ideal for mixed-voltage designs interfacing with 3.3V microcontrollers and 5V peripherals.

Is the CD74HC107E pin-compatible with the CD74HCT107E?

Yes, the CD74HC107E and CD74HCT107E share identical pinout, terminal assignment, and functional behavior-including dual J-K flip-flop topology, negative-edge clocking, asynchronous reset, and complementary outputs. The key distinction lies in input voltage thresholds and supply range: HC supports 2–6V with CMOS-compatible inputs, while HCT is optimized for 4.5–5.5V with TTL-compatible inputs. No PCB changes are required for substitution within 5V systems.