NXP Semiconductors 74HCT374DB,112

Overview

74HCT374DB,112 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state outputs in SO20 (SOT163-1) package, operating from 4.5 V to 5.5 V, featuring TTL-compatible inputs, 16 ns typical propagation delay at 4.5 V, and −40 °C to +125 °C temperature range - used for bidirectional bus buffering and data latching in industrial control logic.

For engineers reviewing the 74HCT374DB,112 datasheet, 74HCT374DB,112 pinout, 74HCT374DB,112 application, or 74HCT374DB,112 equivalent, key selection criteria include edge-trigger timing margin, 3-state output enable behavior, TTL-level input compatibility, and SO20 thermal derating above 109 °C.

Technical Context

This device implements eight independent D-type latches synchronized to the rising edge of CP, with asynchronous 3-state control via active-low OE. Each flip-flop samples Dn on the LOW-to-HIGH clock transition while meeting 12 ns minimum setup and 5 ns hold time at VCC = 4.5 V.

The 3-state buffer stage operates independently of register state: OE HIGH forces Q0–Q7 into high-impedance regardless of stored data or clock activity. Input clamp diodes support interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HCT374DB,112 uses the SO20 plastic small outline package (SOT163-1), 7.5 mm body width, 20-pin gull-wing lead frame, with 12.3 mW/K thermal derating above 109 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type latch applications.

Compared with 74HCT374PW,118, the 74HCT374DB,112 offers superior thermal stability above 109 °C and higher mechanical robustness in vibration-prone environments; versus SN74HCT374N, it delivers guaranteed 125 °C operation and tighter input threshold specs aligned with modern 5 V TTL standards.

Availability

74HCT374DB,112 is available at Aetrix Electronics and suitable for industrial PLC expansion, legacy microprocessor bus interfacing, automotive body control modules, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges.

Supply support for 74HCT374DB,112 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 delivering high-performance logic, analog, and MOSFET solutions with focus on reliability, efficiency, and scalability for industrial and automotive markets.

The 74HCT374 belongs to Nexperia's standard logic portfolio designed specifically for robust, pin-compatible replacements of legacy 74-series devices in demanding 5 V system interfaces.

FAQ

What is the minimum setup time required for reliable operation of 74HCT374DB,112 at 5 V?

The minimum data setup time (tsu) is 12 ns at VCC = 4.5 V and 13 ns at VCC = 5.0 V with CL = 15 pF, measured from Dn valid to CP rising edge. This ensures correct sampling under worst-case process/voltage/temperature corners across the −40 °C to +125 °C range.

Can 74HCT374DB,112 safely interface with 3.3 V logic outputs without level shifters?

No - 74HCT374DB,112 has TTL-compatible inputs requiring VIH ≥ 2.0 V, but its absolute maximum input voltage is VCC + 0.5 V = 6.0 V. Driving from 3.3 V logic is electrically safe, but may violate VIH minimum under VCC = 5.5 V conditions where 3.3 V < 2.0 V is false; actual margin depends on VCC tolerance and noise.

How does the 3-state output enable (OE) interact with the internal flip-flop state?

OE is fully asynchronous and affects only the output buffer stage: when OE = HIGH, Q0–Q7 enter high-impedance regardless of stored data or clock activity. Internal flip-flop states remain unchanged and retain their values until next CP edge, enabling glitch-free bus arbitration.

Is 74HCT374DB,112 qualified for automotive applications per AEC-Q100?

No - while rated for −40 °C to +125 °C and compliant with JEDEC JESD7A/JESD8C, 74HCT374DB,112 is not AEC-Q100 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive-qualified products are unsuitable for safety-critical automotive use without additional customer validation.