Nexperia USA Inc. 74AHC74D-Q100J

Overview

74AHC74D-Q100 from Nexperia is an automotive-qualified dual positive-edge-triggered D-type flip-flop with asynchronous set (active LOW) and reset (active LOW), CMOS-level inputs, 14-pin SO14 package, and operation up to 170 MHz at 5 V with 15 pF load. It functions as a synchronous storage element in clock-domain crossing, data synchronization, and control-state latching within engine control units and ADAS sensor interfaces.

For engineers reviewing the 74AHC74D-Q100 datasheet, 74AHC74D-Q100 pinout, 74AHC74D-Q100 application, or 74AHC74D-Q100 equivalent, this device supports high-noise automotive environments via Schmitt-trigger clock inputs, guaranteed setup/hold timing (5 ns su / 0.5 ns h at 5 V), and AEC-Q100 Grade 1 qualification (-40 °C to +125 °C).

Technical Context

This dual D-flip-flop implements two independent edge-triggered storage cells, each with fully asynchronous active-LOW set and reset that override clock and data inputs. Its Schmitt-trigger clock input enables robust operation with slow-rising or noisy system clocks, eliminating external conditioning circuitry.

The device operates across 2.0 V–5.5 V supply range (74AHC variant), delivers balanced tPLH/tPHL propagation delays (3.7 ns typ at 5 V, 15 pF), and maintains predictable state transitions only when data is stable ≥5 ns before the rising clock edge and held ≥0.5 ns after.

Key Specifications

Pinout & Package

74AHC74D-Q100 uses the SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 index located at top-left corner with notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT74D-Q100, the 74AHC74D-Q100 offers higher noise immunity on inputs but requires CMOS-level drive; versus SN74LVC2G74DCUR, it provides full dual-channel functionality and guaranteed automotive reliability at the cost of larger footprint and higher static current.

Availability

74AHC74D-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS camera interfaces, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC74D-Q100 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions optimized for automotive, industrial, and mobile markets.

The 74AHC74D-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically to meet stringent AEC-Q100 requirements while maintaining pin and functional compatibility with industry-standard 74-series devices.

FAQ

What is the maximum clock frequency supported by the 74AHC74D-Q100?

The 74AHC74D-Q100 supports up to 170 MHz maximum frequency at VCC = 4.5–5.5 V with 15 pF load, as specified in Table 7 of the datasheet. At 50 pF load, fmax drops to 115 MHz. These values assume proper PCB layout, decoupling, and signal integrity - actual system-level performance may be lower due to trace capacitance and driver strength.

Can the 74AHC74D-Q100 operate at 3.3 V supply?

Yes - the 74AHC74D-Q100 is fully specified for operation from 2.0 V to 5.5 V. At 3.3 V, typical propagation delay is 5.2 ns (CL = 15 pF), setup time is 6 ns, and VIH is 2.1 V minimum. All DC and AC parameters remain valid across the full temperature range (-40 °C to +125 °C) at this voltage.

How does the Schmitt-trigger clock input improve system reliability?

The Schmitt-trigger action on CP inputs provides hysteresis (typically 0.5 V at 5 V), allowing reliable edge detection even with slow-rising clock signals (<10 V/ms) or high-impedance traces. This prevents multiple clocking events from a single transition and eliminates need for external RC filtering in noisy automotive harness environments.

Is the 74AHC74D-Q100 pin-compatible with older 74LS74 devices?

Yes - the 74AHC74D-Q100 is pin-compatible with standard 74LS74 and 74HC74 in SO14 package (SOT108-1), sharing identical pin assignments for VCC, GND, CP, D, SD, RD, Q, and Q. However, input voltage thresholds and output drive strength differ, so direct substitution requires verification of logic-level compatibility in the target circuit.