Nexperia USA Inc. 74HCT174PW,118

Overview

74HCT174PW,118 from Nexperia is a hex positive-edge-triggered D-type flip-flop with asynchronous master reset, operating across 4.5 V to 5.5 V supply, delivering 6 independent storage elements for synchronous data latching in digital control logic. It features TTL-compatible inputs, -40 °C to +125 °C industrial temperature range, and TSSOP16 package for high-density PCB layouts in timing-critical state machines.

For engineers reviewing the 74HCT174PW,118 datasheet, 74HCT174PW,118 pinout, 74HCT174PW,118 application, or 74HCT174PW,118 equivalent, key selection factors include input voltage compatibility (TTL-level), propagation delay (≤53 ns at 4.5 V), master reset behavior, CP-to-Q timing margin, and thermal derating profile for TSSOP16 packaging.

Technical Context

This device implements six identical edge-triggered D flip-flops sharing one common clock (CP) and one active-low asynchronous master reset (MR). Each flip-flop stores the logic level present at its Dn input on the LOW-to-HIGH transition of CP, provided setup (≥16 ns) and hold (≥5 ns) times are met.

The MR input forces all Qn outputs LOW independently of CP, enabling system-wide initialization. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, supporting mixed-voltage signal conditioning in legacy TTL-to-CMOS bridging applications.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, 0.65 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex D-type flip-flop with reset applications.

Compared with SN74HCT174N and 74HCT174D, the 74HCT174PW,118 offers superior board-area efficiency and RoHS compliance in TSSOP16, but requires tighter layout controls for thermal management above 91 °C ambient due to lower Ptot derating onset.

Availability

74HCT174PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, digital power supply sequencing, and legacy bus interface buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT174PW,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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on reliability, efficiency, and sustainability.

The 74HCT174 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically to bridge TTL and CMOS systems with robust noise immunity, wide temperature operation, and drop-in compatibility for legacy 5 V digital control architectures.

FAQ

What is the maximum clock frequency supported by the 74HCT174PW,118?

The 74HCT174PW,118 supports a maximum clock frequency of 63 MHz at VCC = 4.5 V and CL = 50 pF, with typical operation up to 24 MHz across the full -40 °C to +125 °C range. This limit is determined by propagation delay (tpd ≤ 53 ns) and setup/hold timing constraints, not by internal oscillator or PLL circuitry.

Can the 74HCT174PW,118 operate with a 3.3 V supply?

No - the 74HCT174PW,118 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH and VIL thresholds fall outside guaranteed switching levels, and output drive strength degrades significantly. For 3.3 V systems, use the 74LVC174 or 74AHC174 variants instead.

Is the master reset (MR) input synchronous or asynchronous?

The MR input is fully asynchronous: asserting MR LOW immediately forces all Qn outputs LOW within tPHL (≤53 ns max), independent of the CP signal state or timing. Release of MR returns the device to normal clocked operation on the next valid CP edge.

Does the 74HCT174PW,118 include Schmitt-trigger inputs?

No - the 74HCT174PW,118 uses standard CMOS input buffers without hysteresis. Its noise immunity derives from high input impedance and rail-to-rail voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), not Schmitt-trigger action. For slow or noisy input edges, external RC filtering or dedicated Schmitt-trigger buffers are recommended.