Texas Instruments SN74AUCH16374DGVR

Overview

SN74AUCH16374 from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65-V to 1.95-V operation and 3.6-V I/O tolerant signaling. It features dual 8-bit sections (1Q1–1Q8 / 2Q1–2Q8), bus-hold on all data inputs, and ±8-mA output drive at 1.8 V - enabling robust low-voltage bus interfacing in high-density memory and I/O expansion systems.

For engineers reviewing the SN74AUCH16374 datasheet, SN74AUCH16374 pinout, SN74AUCH16374 application, or SN74AUCH16374 equivalent, key selection considerations include its sub-1-V operability, 2.8-ns max propagation delay at 1.8 V, Ioff partial-power-down support, and TVSOP-48 (DGV) package compatibility with space-constrained industrial and portable logic designs.

Technical Context

This device implements two independent 8-bit positive-edge-triggered D flip-flop banks, each with dedicated clock (1CLK/2CLK) and output-enable (1OE/2OE) controls. All 16 D inputs feature integrated bus-hold circuitry, eliminating external pull resistors while maintaining valid logic states on floating inputs.

Its 3-state outputs support bidirectional bus driving with high-impedance disable, and Ioff protection ensures no backflow current during partial power-down - critical for hot-swap and multi-rail system interoperability. The design operates across 0.8 V to 2.7 V VCC but is optimized for 1.8-V nominal supply with guaranteed timing up to 250 MHz.

Key Specifications

Pinout & Package

SN74AUCH16374DGVR uses the TVSOP-48 (DGV) package: 48-pin, 3.6-mm × 12.5-mm body, 0.4-mm lead pitch, 1.2-mm max height, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit D-type flip-flop applications.

Compared with SN74LVC16374DGVR and 74AVC16374DGVR, the SN74AUCH16374DGVR uniquely combines sub-1-V operation, integrated bus-hold, and Ioff - making it the only option for robust, resistor-free, hot-swap-capable 16-bit latching in mixed-voltage, ultra-low-power environments.

Availability

SN74AUCH16374DGVR is available at Aetrix Electronics and suitable for industrial I/O expansion, memory interface buffering, high-speed data acquisition, and portable device power management requiring stable component supply and long-term lifecycle assurance.

Supply support for SN74AUCH16374DGVR 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 specializing in analog, embedded processing, and logic solutions, with decades of innovation in high-performance, low-power interface ICs.

The SN74AUCH16374 belongs to TI's Widebus™ family - engineered specifically for low-voltage, high-speed bus interfacing in space-constrained, power-sensitive applications such as portable computing, industrial automation, and test equipment.

FAQ

What is the minimum operating voltage for SN74AUCH16374DGVR?

The SN74AUCH16374DGVR operates down to 0.8 V VCC, with guaranteed functionality and timing specifications starting at this level. Its sub-1-V capability enables use with emerging ultra-low-power microcontrollers and energy-harvesting systems where traditional logic families fail to function reliably.

Does SN74AUCH16374DGVR require external pull-up or pull-down resistors on its data inputs?

No - the SN74AUCH16374DGVR integrates bus-hold circuitry on all 32 D inputs, actively maintaining the last valid logic state without external components. This eliminates the need for 32 discrete resistors, reducing BOM cost, PCB area, and potential signal integrity issues caused by improper termination.

Can SN74AUCH16374DGVR be used in mixed-voltage systems with 3.3-V peripherals?

Yes - the SN74AUCH16374DGVR supports 3.6-V I/O tolerance, allowing its outputs and inputs to safely interface with 3.3-V logic even when powered from a 1.8-V supply. This eliminates level-shifter ICs in many mixed-rail designs, simplifying signal routing and reducing power domain complexity.

How does the Ioff feature benefit system design with SN74AUCH16374DGVR?

The Ioff feature in SN74AUCH16374DGVR disables all outputs and blocks current backflow when VCC = 0, enabling safe insertion or removal of the device in live backplanes or multi-supply systems. This protects upstream drivers and prevents latch-up during partial power-down sequences common in modular industrial hardware.

What is the maximum clock frequency supported by SN74AUCH16374DGVR at 1.8 V?

At 1.8 V, the SN74AUCH16374DGVR supports a maximum clock frequency of 250 MHz, as confirmed by timing characterization in the official datasheet. This performance is enabled by its 2.8-ns maximum propagation delay and tight setup/hold windows (0.7 ns setup, 0.4 ns hold), making it suitable for high-throughput data path registration.