Nexperia USA Inc. 74ALVC574BQ,115

Overview

74ALVC574BQ,115 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state outputs, designed for data latching and bus interface in low-voltage digital systems. It operates from 1.65 V to 3.6 V, features IOFF partial power-down protection, Schmitt-trigger inputs for noise immunity, and supports -40 °C to +125 °C industrial temperature range. Used in synchronous data capture and bidirectional bus buffering applications.

For engineers reviewing the 74ALVC574BQ,115 datasheet, 74ALVC574BQ,115 pinout, 74ALVC574BQ,115 application, or 74ALVC574BQ,115 equivalent, this page delivers verified functional identity, DHVQFN20 package mapping, confirmed 20-terminal pin roles, real-world timing constraints (tsu = 0.8 ns, tpd ≤ 4.1 ns), and validated alternatives for bus interface and level-shifting designs.

Technical Context

This device implements eight independent D-type flip-flops synchronized to the rising edge of CP, with a separate active-low OE input controlling all eight 3-state outputs without affecting internal state. The IOFF circuit disables outputs when VCC = 0 V, preventing backflow current during partial power-down sequences.

Schmitt-trigger inputs tolerate slow signal edges (Δt/ΔV down to 10 ns/V at 3.6 V), enabling robust operation with noisy or RC-filtered control lines. All static and dynamic parameters-including VIH/VIL thresholds, VOH/VOL levels, propagation delay, and set-up/hold times-are fully characterized across the full 1.65–3.6 V supply range and -40 °C to +125 °C ambient.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, 20-terminal no-lead quad flat design with exposed thermal pad; optimized for high-density PCB layouts and thermal performance in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC574APWR and 74LVC574ABQ,115, the 74ALVC574BQ,115 uniquely guarantees IOFF operation and -40 °C to +125 °C qualification-critical for automotive and industrial systems requiring fail-safe power sequencing and extended thermal reliability.

Availability

74ALVC574BQ,115 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, high-speed test equipment interfaces, and telecom baseband data capture requiring stable component supply across extended temperature ranges and partial power-down capability.

Supply support for 74ALVC574BQ,115 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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and robustness for industrial, automotive, and computing markets.

The 74ALVC574BQ,115 belongs to Nexperia's ALVC (Advanced Low-Voltage CMOS) logic family, engineered specifically for low-power, high-speed bus interface and data latching in mixed-voltage embedded systems operating from 1.65 V to 3.6 V.

FAQ

What is the maximum clock frequency supported by the 74ALVC574BQ,115?

The device supports up to 300 MHz maximum clock frequency at VCC = 3.6 V and Tamb = 25 °C, with guaranteed 150 MHz operation across the full -40 °C to +125 °C range. This is derived directly from the fmax specification in Table 7 of the datasheet, where tpd ≤ 4.1 ns at 3.6 V defines the practical upper limit for reliable edge-triggered sampling.

Does the 74ALVC574BQ,115 support hot-swap or partial power-down operation?

Yes - its integrated IOFF circuit actively disables outputs and limits leakage to ±80 μA when VCC = 0 V, preventing damaging backflow current during live insertion or multi-rail power sequencing. This behavior is explicitly verified in Table 9 and Section 1 of the datasheet under "partial power down applications."

Can the 74ALVC574BQ,115 interface directly with 5 V TTL logic?

No - it is not 5 V tolerant. Inputs accept up to 3.6 V absolute maximum (Table 4), and VIH is specified as 2.0 V min at VCC ≥ 2.7 V. Direct connection to 5 V TTL outputs risks exceeding VI absolute maximum and may cause latch-up. A level translator or resistive divider is required for safe interfacing.

Is the thermal pad on the DHVQFN20 package electrically connected?

No - the exposed pad (terminal 1 index area) has no internal electrical connection. Per Section 5.1, it may be left unsoldered, floated, or connected to GND for thermal enhancement, but must never be tied to VCC or any other voltage rail to avoid short circuits or thermal stress.