NXP Semiconductors 74HCT107N,652

Overview

74HCT107N,652 from NXP Semiconductors is a dual negative-edge-triggered JK flip-flop with asynchronous active-LOW reset, TTL-compatible input levels, 14-pin DIP package, and operation across −40 °C to +125 °C. It implements synchronous state control via J/K inputs and supports clocked data storage in digital logic systems such as counters and shift registers.

For engineers reviewing the 74HCT107N,652 datasheet, 74HCT107N,652 pinout, 74HCT107N,652 application, or 74HCT107N,652 equivalent, key selection criteria include TTL-level input compatibility, guaranteed negative-edge triggering, asynchronous reset behavior, propagation delay (≤54 ns at VCC = 4.5 V), and DIP14 through-hole mounting for prototyping and industrial control boards.

Technical Context

The 74HCT107N,652 integrates two independent JK flip-flops sharing no internal coupling-each with dedicated J, K, clock (CP), and reset (R) terminals. Its TTL-compatible inputs accept 2.0 V minimum VIH and 0.8 V maximum VIL at 4.5–5.5 V supply, enabling direct interfacing with legacy 74LS logic without level-shifting.

Operation requires J and K inputs to be stable for ≥25 ns before the HIGH-to-LOW clock transition (tsu = 25 ns max at VCC = 4.5 V). The asynchronous reset overrides clock action and forces Q = LOW / Q̅ = HIGH regardless of CP edge timing, supporting immediate state clearing in safety-critical sequencing.

Key Specifications

Pinout & Package

74HCT107N,652 uses a 14-lead plastic dual in-line package (DIP14, SOT27-1) with 300-mil body width and through-hole mounting. Pin 1 is top-left corner when notch faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC107N,652, the 74HCT107N,652 enables direct connection to legacy TTL outputs without level translation, while SN74HCT107N offers identical functionality with alternate supply-chain assurance-both preserve the DIP14 footprint and asynchronous reset timing critical for industrial sequencers.

Availability

74HCT107N,652 is available at Aetrix Electronics and suitable for industrial control sequencing, digital counter design, legacy system logic upgrades, and power supply monitoring latching requiring stable component supply across extended temperature ranges.

Supply support for 74HCT107N,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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74HCT107N,652 belongs to NXP's legacy 74HCT logic family, designed specifically to provide TTL-compatible CMOS performance for upgrading 74LS-based systems while maintaining pin-for-pin compatibility and industrial temperature resilience.

FAQ

What logic family does the 74HCT107N,652 belong to, and why does it matter for system integration?

The 74HCT107N,652 belongs to the 74HCT (High-speed CMOS with TTL input thresholds) logic family. This means its inputs recognize standard TTL voltage levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V), allowing direct interfacing with legacy 74LS devices without level shifters. The 74HCT107N,652 thus simplifies migration paths from older TTL-based designs while delivering CMOS advantages like low static power and high noise immunity.

Does the 74HCT107N,652 support 3.3 V operation?

No, the 74HCT107N,652 is not rated for 3.3 V operation. Its recommended supply voltage range is strictly 4.5 V to 5.5 V, as defined in Table 5 of the NXP datasheet. Attempting to operate the 74HCT107N,652 below 4.5 V may result in undefined input thresholds, increased propagation delay, or failure to meet timing specifications - particularly the 25 ns setup time requirement.

How does the asynchronous reset function in the 74HCT107N,652 differ from synchronous reset in other flip-flops?

The 74HCT107N,652 features an asynchronous active-LOW reset (R pins 10 and 13) that forces Q = LOW and Q̅ = HIGH immediately upon assertion, regardless of clock state or edge timing. Unlike synchronous resets that require a clock edge to take effect, this behavior enables instantaneous state clearing - critical for safety interlocks, power-on initialization, or fault recovery where latency cannot be tolerated. The 74HCT107N,652 guarantees reset propagation within 57 ns across −40 °C to +125 °C.

Can the 74HCT107N,652 be used in place of the 74LS107 in an existing design?

Yes, the 74HCT107N,652 is a functional and pin-compatible replacement for the 74LS107. It matches the DIP14 footprint, identical pin functions (J, K, CP, R, Q, Q̅), and TTL-compatible input thresholds. The 74HCT107N,652 also improves on 74LS107 with lower power consumption, higher noise immunity, and guaranteed operation up to +125 °C - making it suitable for drop-in upgrades without PCB modification.

What is the maximum operating frequency of the 74HCT107N,652, and what limits it?

The 74HCT107N,652 supports a maximum clock frequency of 20 MHz under worst-case conditions (−40 °C to +125 °C, VCC = 4.5 V), as specified in Table 7. This limit arises from the 54 ns maximum propagation delay (tpd) from CP to Q output, which defines the minimum clock period. At 25 °C and VCC = 5.0 V with CL = 15 pF, fmax reaches 73 MHz - but system-level timing must account for setup/hold times (tsu = 25 ns, th = 5 ns) and board-level signal integrity.