Nexperia USA Inc. 74HCT174PW-Q100J

Overview

74HCT174PW-Q100 from Nexperia is an automotive-grade hex positive-edge-triggered D-type flip-flop with asynchronous master reset, operating across -40 °C to +125 °C, supporting 4.5 V to 5.5 V supply, TTL-compatible inputs, and delivering propagation delay as low as 18 ns (VCC = 5.0 V, CL = 15 pF). It functions as a synchronous data latch in digital control logic for engine control units, body electronics, and ADAS sensor interface timing chains.

For engineers reviewing the 74HCT174PW-Q100 datasheet, 74HCT174PW-Q100 pinout, 74HCT174PW-Q100 application, or 74HCT174PW-Q100 equivalent, key selection criteria include TTL-level input compatibility, AEC-Q100 Grade 1 qualification, TSSOP16 thermal performance, and precise set-up/hold timing margins under automotive temperature extremes.

Technical Context

This device integrates six independent edge-triggered D-type latches sharing a common clock (CP) and asynchronous master reset (MR), where data on D0–D5 is captured on the LOW-to-HIGH transition of CP and appears at Q0–Q5. The MR input forces all outputs LOW independently of clock state, enabling system-wide initialization.

Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Static and dynamic characteristics are fully specified over -40 °C to +125 °C, with VIH/VIL thresholds fixed at 2.0 V/0.8 V (VCC = 4.5–5.5 V), ensuring robust noise immunity in electrically noisy vehicle environments.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, 4.4 mm body width, 0.65 mm lead pitch, optimized for automated assembly and thermal dissipation in space-constrained automotive modules.

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 SO16 variant trades thermal efficiency for mechanical robustness and ease of rework, while the TI alternative offers design continuity in TI-centric platforms but with slightly relaxed timing margins under heavy capacitive loads.

Availability

74HCT174PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera interfaces, and electric power steering systems requiring stable component supply across extended automotive temperature ranges.

Supply support for 74HCT174PW-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 specializing in high-volume, high-reliability logic, analog, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging technologies.

The 74HCT174-Q100 product line delivers AEC-Q100-compliant, TTL-compatible flip-flops optimized for deterministic data capture in automotive control and sensing subsystems where timing predictability and environmental ruggedness are mandatory.

FAQ

What is the maximum clock frequency supported by 74HCT174PW-Q100?

The device supports a maximum clock frequency of 69 MHz at VCC = 5.0 V and CL = 15 pF, as specified in Table 7 of the datasheet. This value decreases to 24 MHz at -40 °C to +85 °C ambient and 20 MHz across the full -40 °C to +125 °C range due to increased propagation delay at temperature extremes.

Can 74HCT174PW-Q100 be used with a 3.3 V supply?

No - the 74HCT174PW-Q100 is specified only for 4.5 V to 5.5 V operation per Table 5. Its TTL-compatible inputs require VIH ≥ 2.0 V, but internal logic thresholds and output drive strength are not characterized below 4.5 V; use 74HC174PW-Q100 for 2.0–6.0 V operation if 3.3 V compatibility is required.

How does the master reset (MR) interact with the clock input?

MR is asynchronous and dominant: a LOW on pin 1 forces all Q outputs LOW immediately, overriding any clock activity. The flip-flops remain reset until MR returns HIGH, after which the next valid CP rising edge captures new D-input data - no clock edge is required to maintain the reset state.

Is there a recommended PCB layout practice for minimizing noise coupling?

Yes - place a 100 nF ceramic decoupling capacitor between VCC (pin 16) and GND (pin 8) within 3 mm of the package, use solid ground plane beneath the TSSOP16 footprint, route CP and MR traces short and away from noisy switching nodes, and avoid routing D/Q lines parallel to clock or reset lines to prevent crosstalk-induced timing violations.