Texas Instruments SN74LV574ARGYR

Overview

SN74LV574ARGYR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2-V to 5.5-V V_CC operation. It features a maximum propagation delay of 7.1 ns at 5 V, I_off support for partial-power-down mode, and balanced CMOS 3-state outputs optimized for driving capacitive or low-impedance bus loads in I/O expander and bidirectional bus driver applications.

For engineers reviewing the SN74LV574ARGYR datasheet, SN74LV574ARGYR pinout, SN74LV574ARGYR application, or SN74LV574ARGYR equivalent, key selection criteria include its 20-pin VQFN (RGY) package, 3.3-V/5-V mixed-mode voltage compatibility, t_su/t_h timing margins down to 3.5 ns/1.5 ns, and latch-up immunity exceeding 250 mA per JESD17.

Technical Context

The SN74LV574ARGYR implements eight independent D-type latches triggered on the rising edge of CLK, with asynchronous output-enable (OE) control enabling high-impedance state for bus sharing. Its I_off circuitry actively disables outputs during power-down, preventing backflow current when V_CC = 0 V.

Each channel supports 5-V-tolerant inputs while operating from 2-V to 5.5-V supplies, enabling level translation between disparate logic domains. The device's balanced drive strength-±8 mA at 3.3 V and ±16 mA at 5 V-ensures clean signal integrity into 15-pF to 50-pF loads without external termination.

Key Specifications

Pinout & Package

VQFN-20 (RGY) package, 4 mm × 3.5 mm body size, 0.5-mm pitch, wettable flank terminals, exposed thermal pad.

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 74LVX574MTCX, SN74LV574ARGYR delivers superior industrial temperature support, JESD17 latch-up immunity, and guaranteed 5-V input tolerance-critical for telecom, server, and motor control applications where reliability and mixed-voltage interoperability are non-negotiable.

Availability

SN74LV574ARGYR is available at Aetrix Electronics and suitable for servers, LED displays, network switches, and motor drivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LV574ARGYR 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

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power management, and signal chain technologies.

The SN74LV574A family targets industrial and communications infrastructure applications requiring robust, low-power, mixed-voltage D-type latching with bus-friendly 3-state outputs and partial-power-down capability.

FAQ

What is the maximum clock frequency supported by SN74LV574ARGYR at 3.3 V?

The SN74LV574ARGYR supports a maximum clock frequency of 145 MHz at 3.3 V with a 15-pF load, based on its typical propagation delay of 6.8 ns and minimum pulse width of 5 ns. This enables high-throughput data capture in real-time control loops and high-speed serial interface buffering applications using the SN74LV574ARGYR.

Does SN74LV574ARGYR support hot-swap or partial-power-down operation?

Yes, SN74LV574ARGYR includes I_off circuitry that disables all outputs and limits leakage current to ≤5 µA when V_CC = 0 V. This feature enables safe hot-swap operation in modular systems and prevents damaging current backflow during power sequencing-key for reliable deployment of SN74LV574ARGYR in telecom line cards and server backplanes.

Can SN74LV574ARGYR accept 5-V input signals while operating from a 3.3-V supply?

Yes, SN74LV574ARGYR features 5-V-tolerant inputs, allowing VI to range from 0 V to 5.5 V regardless of V_CC. This enables direct interfacing with 5-V microcontrollers or legacy peripherals without external level shifters-a critical advantage in mixed-voltage systems using SN74LV574ARGYR as a bus interface or I/O expander.

What is the thermal resistance (R_θJA) of the SN74LV574ARGYR VQFN package?

The SN74LV574ARGYR in the RGY (VQFN-20) package has a junction-to-ambient thermal resistance of 37°C/W, significantly lower than alternate packages like SOIC (58°C/W) or SSOP (70°C/W). This enables higher sustained output drive capability and improved reliability in thermally constrained applications such as compact LED display drivers using SN74LV574ARGYR.

How does the SN74LV574ARGYR handle unused input pins?

All unused input pins on SN74LV574ARGYR-including D inputs, CLK, and OE-must be tied to a defined logic level (V_CC or GND) to prevent floating states that cause increased power consumption, noise susceptibility, or erratic behavior. TI recommends pullup resistors on OE for default high-impedance startup, ensuring deterministic operation of SN74LV574ARGYR in power-sensitive systems.