Texas Instruments SN74LVTH574ZQNR

Overview

SN74LVTH574ZQNR from Texas Instruments is a 3.3-V ABT octal edge-triggered D-type flip-flop with 3-state outputs, designed for mixed-mode signal operation (5-V inputs/outputs with 3.3-V V_CC), supporting unregulated battery operation down to 2.7 V and featuring bus-hold on all data inputs. It delivers 150-MHz clock frequency, <0.8-V output ground bounce (V_OLP) at 3.3 V, and I_off/power-up 3-state for hot insertion - used in high-density data bus interface circuits in industrial control backplanes.

For engineers reviewing the SN74LVTH574ZQNR datasheet, SN74LVTH574ZQNR pinout, SN74LVTH574ZQNR application, or SN74LVTH574ZQNR equivalent, key selection criteria include its 20-pin ZQN VFBGA package, 3.3-V supply with 5-V tolerant I/O, edge-triggered synchronous latching behavior, bus-hold functionality eliminating external resistors, and compliance with JESD 17 latch-up (>500 mA) and JESD 22 ESD standards (2000-V HBM).

Technical Context

This device implements eight independent positive-edge-triggered D-type flip-flops with a shared clock (CLK) and buffered output-enable (OE) control. OE places all Q outputs simultaneously into high-impedance without affecting internal state retention or clock/data sampling logic.

Its ABT (Advanced BiCMOS Technology) architecture enables TTL-level compatibility at 3.3-V V_CC, with input thresholds referenced to V_CC (V_IL = 0.8 V, V_IH = 2.0 V) and guaranteed 5-V tolerant inputs up to 5.5 V. Bus-hold circuitry maintains valid logic levels on floating D inputs, drawing ±75 μA at V_CC = 3 V.

Key Specifications

Pinout & Package

VFBGA-20 (ZQN) package: 3.5 mm × 4.5 mm, 0.5-mm pitch, 1-mm maximum height, with exposed thermal pad (Pin 21) requiring PCB soldering for thermal and mechanical integrity.

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 SN74AHCT574N, SN74LVTH574ZQNR uniquely combines 3.3-V operation with 5-V I/O tolerance, integrated bus-hold, and hot-insertion support - making it the only option among the three qualified for mixed-voltage backplane interfaces requiring zero external bias components and safe live insertion.

Availability

SN74LVTH574ZQNR is available at Aetrix Electronics and suitable for industrial backplane interfaces, automated test equipment data capture, and communications line card buffering requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LVTH574ZQNR 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 precision analog, high-speed logic, and power management ICs.

The SN74LVTH574ZQNR belongs to TI's ABT logic family, engineered specifically for high-speed, mixed-voltage bus interface applications in industrial automation, test instrumentation, and telecom infrastructure where signal integrity, voltage translation, and robustness are critical.

FAQ

What is the operating voltage range for SN74LVTH574ZQNR?

The SN74LVTH574ZQNR operates from 2.7 V to 3.6 V on V_CC, enabling compatibility with unregulated battery supplies and brownout conditions. Its inputs tolerate up to 5.5 V regardless of V_CC level, allowing direct connection to 5-V logic without level-shifting circuitry - a key feature confirmed in the recommended operating conditions table of the SCBS688G datasheet.

Does SN74LVTH574ZQNR support hot insertion?

Yes, SN74LVTH574ZQNR supports hot insertion via two integrated features: I_off circuitry disables outputs when V_CC = 0 V to prevent current backflow, and power-up 3-state forces outputs into high-impedance during power ramp-up/down. These functions are explicitly documented in the "Features" section and validated per JESD 78 and TI application reports on hot-swap logic.

What package type is SN74LVTH574ZQNR supplied in?

SN74LVTH574ZQNR is supplied in a 20-pin VFBGA package with ZQN designation: 3.5 mm × 4.5 mm body, 0.5-mm pitch, 1-mm maximum height, and an exposed thermal pad (Pin 21). This package is optimized for high-density PCB layouts and requires soldering the thermal pad to the board for thermal dissipation and mechanical stability, as specified in TI's RGY/ZQN package drawings.

How does bus-hold functionality work on SN74LVTH574ZQNR?

SN74LVTH574ZQNR integrates active bus-hold circuitry on all eight D inputs, maintaining a valid logic level (±75 μA hold current at V_CC = 3 V) when inputs float. This eliminates the need for external pullup/pulldown resistors - confirmed in the "Features" list and electrical characteristics table - reducing BOM cost and PCB area while preventing metastability in unterminated bus segments.

What is the maximum clock frequency supported by SN74LVTH574ZQNR?

SN74LVTH574ZQNR supports a maximum clock frequency of 150 MHz across its full operating temperature range (−40°C to 85°C) and supply range (2.7 V to 3.6 V), as verified in the "Timing Requirements" table of the SCBS688G datasheet. This rating applies under CL = 50 pF loading and accounts for worst-case process/voltage/temperature corners.