NXP Semiconductors 74LV574N,112

Overview

74LV574N,112 from NXP Semiconductors is an octal D-type flip-flop with positive-edge clock triggering, non-inverting 3-state outputs, and a common output enable (OE) input. It operates across 1.0 V to 5.5 V supply voltage, supports −40 °C to +125 °C ambient range, and features 20-pin DIP20 packaging. It serves as a bus-oriented data latch in microcontroller peripheral interfaces and memory address/data buffering.

For engineers reviewing the 74LV574N,112 datasheet, 74LV574N,112 pinout, 74LV574N,112 application, or 74LV574N,112 equivalent, key selection criteria include its low-voltage operation down to 1.0 V, guaranteed 3-state timing (enable/disable times ≤25 ns at 3.3 V), and compatibility with TTL input levels at VCC = 2.7 V–3.6 V.

Technical Context

The 74LV574N,112 implements eight independent D-type latches synchronized to the LOW-to-HIGH transition of the shared CP input. Its 3-state outputs are controlled solely by the active-low OE signal, which has no effect on internal flip-flop states during assertion.

Designed as a low-voltage Si-gate CMOS device, it achieves propagation delay ≤15 ns (VCC = 3.3 V, CL = 15 pF), set-up time ≤13 ns, and hold time ≥−2 ns-enabling reliable operation in high-speed digital buses while maintaining backward functional and pin compatibility with 74HC574 and 74HCT574.

Key Specifications

Pinout & Package

DIP20 plastic dual in-line package (300 mil, SOT146-1), 20 leads, through-hole mounting. Body dimensions: 26.92 mm × 6.40 mm × 4.20 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LV574N,112, the SO20 and TSSOP20 alternatives retain identical logic function, timing, and temperature performance but reduce PCB footprint and enable automated assembly-making them preferable for high-volume or space-constrained designs where through-hole mounting is not required.

Availability

74LV574N,112 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and legacy-compatible embedded computing requiring stable component supply over extended temperature ranges.

Supply support for 74LV574N,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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LV574N,112 belongs to NXP's LV logic family, designed specifically for low-voltage, high-noise-immunity digital interfacing in harsh environments-from factory floors to vehicle engine compartments.

FAQ

What is the maximum clock frequency supported by the 74LV574N,112?

The 74LV574N,112 supports a maximum clock frequency of 70 MHz at VCC = 3.0–3.6 V and Tamb = 25 °C, with guaranteed minimum fmax of 20 MHz across the full −40 °C to +125 °C operating range. This is derived from dynamic characteristics tables specifying tW (pulse width) and propagation delay limits under defined load conditions.

Does the 74LV574N,112 require external pull-up resistors on its outputs?

No, the 74LV574N,112 does not require external pull-up resistors on its Q0–Q7 outputs because it features true 3-state (high-impedance) outputs-not open-drain. When OE is HIGH, outputs float electrically; when OE is LOW, they actively drive HIGH or LOW based on stored data. Pull-ups are only needed if bus termination or weak biasing is required by the system design.

Can the 74LV574N,112 operate reliably at 1.2 V supply voltage?

Yes, the 74LV574N,112 is fully specified to operate at 1.2 V supply voltage, with static and dynamic parameters guaranteed across −40 °C to +125 °C. At 1.2 V, propagation delay is ≤80 ns and maximum frequency is ≥15 MHz, enabling use in ultra-low-power battery-backed subsystems and energy-harvesting applications.

How does the output enable (OE) pin behave during power-up or brown-out conditions?

The OE pin of the 74LV574N,112 is not internally biased; it must be actively driven LOW after VCC stabilizes to avoid undefined output states. During power-up or brown-out, OE should be held HIGH (via external pull-up) until supply reaches valid operating voltage, ensuring outputs remain in high-impedance mode and preventing bus contention.

Is the 74LV574N,112 pin-compatible with the 74HC574 in all packages?

Yes, the 74LV574N,112 is pin- and functionally compatible with the 74HC574 in the DIP20 package (SOT146-1). Both share identical pin numbering, logic symbol, and functional behavior-including positive-edge clocking and active-low 3-state control-allowing direct substitution without PCB modification, provided voltage and timing margins are verified for the target application.