Nexperia USA Inc. 74HCT174D-Q100J

Overview

74HCT174D-Q100 from Nexperia is an automotive-qualified hex positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), operating from 4.5 V to 5.5 V supply, delivering 21 ns propagation delay at 4.5 V, and supporting -40 °C to +125 °C ambient range for engine control unit (ECU) signal synchronization.

For engineers reviewing the 74HCT174D-Q100 datasheet, 74HCT174D-Q100 pinout, 74HCT174D-Q100 application, or 74HCT174D-Q100 equivalent, key selection considerations include TTL-compatible input thresholds, simultaneous six-bit edge-triggered storage, MR-driven synchronous reset behavior, and SO16 package thermal derating above 110 °C.

Technical Context

This device implements six independent D-type latches sharing a common clock (CP) and active-low master reset (MR). Each flip-flop samples its Dn input on the LOW-to-HIGH transition of CP, provided setup (16 ns min at 4.5 V) and hold (5 ns min) timing constraints are met.

The MR input forces all Qn outputs LOW asynchronously, independent of CP edge timing. Input clamp diodes enable interface to voltages exceeding VCC when used with current-limiting resistors, and output drive capability is ±4.0 mA at VCC = 4.5 V with VOH ≥ 3.98 V and VOL ≤ 0.26 V.

Key Specifications

Pinout & Package

74HCT174D-Q100 uses the SOT109-1 (SO16) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, JEDEC MS-012 compliant, with 500 mW total power dissipation at Tamb ≤ 110 °C (derates 12.4 mW/K above).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT174PW-Q100, the D-package offers superior thermal dissipation above 110 °C but occupies more board area; versus SN74HCT174QPWRQ1, the Nexperia part provides guaranteed pin compatibility and tighter propagation delay consistency across temperature.

Availability

74HCT174D-Q100 is available at Aetrix Electronics and suitable for engine control units, instrument clusters, body control modules, and ADAS camera interfaces requiring stable component supply across automotive production lifecycles.

Supply support for 74HCT174D-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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The 74HCT174-Q100 series belongs to Nexperia's automotive logic portfolio, engineered specifically for robust signal registration in harsh-temperature vehicle subsystems where deterministic timing and AEC-Q100 compliance are mandatory.

FAQ

What is the minimum pulse width required on the MR input to ensure reliable reset?

The MR input requires a minimum LOW pulse width of 20 ns at VCC = 4.5 V to guarantee all six flip-flops reset synchronously. This value is derived from tW specification in Table 7 and verified across -40 °C to +125 °C. Pulses shorter than this may result in partial or failed reset due to internal propagation delays.

Can 74HCT174D-Q100 operate reliably at 3.3 V supply?

No - the 74HCT174D-Q100 is specified only for 4.5 V to 5.5 V operation per Table 5. At 3.3 V, VIH and VIL thresholds fall outside TTL compatibility range, and output drive strength degrades significantly. For 3.3 V systems, use the 74LVC174 or 74AUP174 families instead.

How does the input clamp diode affect interface design with 12 V sensors?

The integrated clamp diodes allow safe connection to 12 V signals when paired with a series current-limiting resistor (e.g., 10 kΩ), limiting IIK to ≤ ±20 mA per Table 4. This avoids external protection circuitry but requires resistor power rating calculation: P = (12 V − VCC)² / R ≈ 7 mW for 10 kΩ at 5 V.

Is there any functional difference between 74HC174D-Q100 and 74HCT174D-Q100 besides input voltage levels?

Yes - the 74HCT variant exhibits faster propagation delay (21 ns vs 20 ns typical for HC at 4.5 V), higher output drive (±4.0 mA vs ±3.5 mA for HC), and improved noise immunity due to tighter input threshold margins. These differences impact timing closure in high-speed control loops and fanout capability in dense logic networks.