Nexperia USA Inc. 74HC174DB,118

Overview

74HC174DB,118 from Nexperia is a hex positive-edge-triggered D-type flip-flop with asynchronous master reset, designed for synchronous data latching in digital logic systems. It operates across 2.0 V to 6.0 V supply, delivers propagation delay as low as 16 ns at VCC = 6.0 V, supports -40 °C to +125 °C ambient range, and features six independent D inputs (D0–D5), six Q outputs (Q0–Q5), shared clock (CP), and active-low master reset (MR). It is used in address register staging, parallel data capture, and control state storage in industrial microcontroller peripherals.

For engineers reviewing the 74HC174DB,118 datasheet, 74HC174DB,118 pinout, 74HC174DB,118 application, or 74HC174DB,118 equivalent, key selection considerations include its CMOS-level input compatibility, SO16 package footprint, 16 ns minimum tpd at 6 V, asynchronous reset behavior, and guaranteed operation up to +125 °C - critical for deterministic timing in embedded control and instrumentation circuits.

Technical Context

This device implements six identical edge-triggered D flip-flops sharing one clock and one global reset line. Each stage samples its D input on the LOW-to-HIGH transition of CP and updates Q accordingly; MR forces all Q outputs LOW independently of CP. The internal structure includes Schmitt-triggered inputs with clamp diodes, enabling robust interfacing to overvoltage sources via current-limiting resistors.

It conforms to JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards, with latch-up immunity exceeding 100 mA per JESD78 Class II Level B and ESD protection rated at ≥2000 V HBM and ≥1000 V CDM - ensuring reliability in mixed-signal board environments with transient noise.

Key Specifications

Pinout & Package

74HC174DB,118 is supplied in SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, gull-wing leads, standard JEDEC MS-012 outline.

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 74HCT174DB,118, the original part offers superior noise margin in mixed-voltage 3.3 V systems, while SN74HC174N trades manufacturability for manual assembly flexibility - making 74HC174DB,118 optimal for automated industrial PCB production requiring SO16 compliance and wide-VCC support.

Availability

74HC174DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller address latching, and digital panel meter data capture requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC174DB,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, analog, and discrete components with emphasis on reliability, efficiency, and automotive-grade qualification.

The 74HC174 belongs to Nexperia's 74HC logic family - engineered for low-power, high-noise-immunity digital interfacing in industrial control, instrumentation, and consumer electronics where consistent timing and wide supply tolerance are mandatory.

FAQ

What is the maximum clock frequency supported by 74HC174DB,118?

The device supports up to 35 MHz maximum clock frequency at VCC = 6.0 V and CL = 50 pF, as specified in dynamic characteristics. At 4.5 V, fmax drops to 30 MHz. These values assume proper PCB layout, decoupling, and load conditions - actual system-level frequency may be lower due to trace inductance and fan-out loading.

Can 74HC174DB,118 drive LED indicators directly?

No - its outputs are rated for ±25 mA DC per pin but are optimized for logic-level interfacing, not sustained current sinking. Driving LEDs requires external current-limiting resistors and may exceed recommended IO limits if multiple outputs are active simultaneously. Use dedicated LED drivers or buffer transistors for indicator applications.

Is the master reset (MR) input debounced internally?

No - MR is a purely combinational asynchronous input with no internal filtering or hysteresis. External RC debounce or Schmitt-trigger conditioning is required if driven by mechanical switches or noisy control signals to prevent spurious resets during power-up or EMI events.

Does 74HC174DB,118 support hot insertion or live swapping?

No - it lacks Ioff (power-off protection) or partial-power-down functionality. Applying signals to inputs or outputs while VCC is unpowered risks forward-biasing internal clamp diodes and causing excessive current flow. Always power VCC before applying any logic signals during system integration or maintenance.