NXP Semiconductors 74LVTH574D,118

Overview

74LVTH574D,118 from NXP Semiconductors is a 3.3 V octal D-type flip-flop with 3-state outputs, edge-triggered on the rising clock edge (CP), featuring independent output enable (OE) control and bus-hold inputs. It provides 8-bit registered data latching and high-drive 3-state buffering for interfacing with MOS microprocessors and heavily loaded buses. Typical propagation delay is 3.6 ns at 3.3 V, supporting up to 150 MHz clock operation in industrial temperature range (−40 °C to +85 °C).

For engineers reviewing the 74LVTH574D,118 datasheet, 74LVTH574D,118 pinout, 74LVTH574D,118 application, or 74LVTH574D,118 equivalent, key selection criteria include its TTL-compatible I/O levels, 3.3 V supply operation with 5 V input tolerance, bus-hold functionality eliminating external pull-ups, and SO20 package compatibility with legacy 74-series layouts.

Technical Context

This device implements eight independent D-type flip-flops synchronized to a common rising-edge clock (CP), each feeding a dedicated 3-state output buffer. The output enable (OE) pin operates asynchronously and independently of CP, placing all Q0–Q7 outputs into high-impedance state when asserted HIGH.

It features bus-hold circuitry on all D-inputs (IBHH/IBHL ≥ ±75 µA at 3.0 V), live insertion/extraction capability, power-up 3-state behavior, and latch-up protection exceeding 500 mA per JESD78 Class II. Input voltage tolerance extends to 5.5 V, enabling direct interfacing with 5 V logic systems while operating from a 3.3 V supply.

Key Specifications

Pinout & Package

74LVTH574D,118 is housed in a plastic small outline package (SO20) per SOT163-1, with 20 leads, 7.5 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by an index area; the package is RoHS-compliant and lead-free.

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 74ALVCH162244DGGR, the 74LVTH574D,118 uniquely combines 32 mA drive, integrated bus-hold, and true edge-triggered registration in a standard SO20 package-making it optimal for industrial bus interfaces where reliability, noise immunity, and layout simplicity are critical.

Availability

74LVTH574D,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microprocessor bus interfacing, and high-speed test equipment requiring stable component supply and long-term lifecycle support.

Supply support for 74LVTH574D,118 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 74LVTH574D,118 belongs to NXP's high-performance LVT/LVTH logic family, designed specifically for robust 3.3 V system interfacing with 5 V tolerance, bus-hold, and industrial temperature operation.

FAQ

What is the maximum clock frequency supported by the 74LVTH574D,118?

The 74LVTH574D,118 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.0 V to 3.6 V). This value is specified in Table 7 of the NXP datasheet and reflects guaranteed operation across the full industrial temperature range (−40 °C to +85 °C), making the 74LVTH574D,118 suitable for high-speed synchronous data capture in industrial and test equipment applications.

Does the 74LVTH574D,118 require external pull-up resistors on its D-inputs?

No, the 74LVTH574D,118 does not require external pull-up resistors on its D0–D7 inputs because it integrates bus-hold circuitry. As confirmed in Section 2 and Table 6 of the datasheet, IBHH and IBHL currents (±75 µA to ±150 µA at 3.0 V) actively maintain the last valid logic state on floating inputs. This feature eliminates BOM components and improves noise immunity-key advantages of the 74LVTH574D,118 over non-bus-hold alternatives.

Can the 74LVTH574D,118 safely interface with 5 V logic systems?

Yes, the 74LVTH574D,118 supports 5 V-tolerant inputs: VI is rated from 0 V to 5.5 V per Table 5, and absolute maximum input voltage is +7.0 V (Table 4). Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) ensure reliable recognition of 5 V logic levels while operating from a 3.3 V supply-enabling direct connection to legacy 5 V microcontrollers or peripherals without level-shifting circuitry in the 74LVTH574D,118 signal path.

What is the purpose of the OE pin on the 74LVTH574D,118?

The OE (output enable) pin on the 74LVTH574D,118 is an active-low, asynchronous control that places all eight Q0–Q7 outputs into high-impedance (OFF) state when driven HIGH-regardless of clock or input activity. When OE is LOW, the registered Qn values appear at the outputs. This enables multi-drop bus sharing and prevents contention, a core function explicitly defined in the General Description and Function Table (Table 3) of the 74LVTH574D,118 datasheet.

Is the 74LVTH574D,118 pin-compatible with older 74-series octal latches like the 74LS374?

The 74LVTH574D,118 shares identical pinout (SO20, SOT163-1) and logic function with industry-standard 74-series octal D-type latches such as the 74LS374 and 74HC574, including matching CP, OE, Dn, Qn, VCC, and GND positions. However, it operates at 3.3 V with higher speed and 5 V-tolerant inputs-so while mechanical and functional pin mapping is preserved, voltage-level compatibility must be verified per system requirements for the 74LVTH574D,118 deployment.