Texas Instruments SN74AUCH16374DGGR

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 banks (1Q1–1Q8 / 2Q1–2Q8), bus-hold on all data inputs, ±8-mA output drive at 1.8 V, and max propagation delay of 2.8 ns at 1.8 V. It serves as a high-speed register or bidirectional bus driver in low-voltage memory interfaces and FPGA I/O expansion.

For engineers reviewing the SN74AUCH16374 datasheet, SN74AUCH16374 pinout, SN74AUCH16374 application, or SN74AUCH16374 equivalent, key selection criteria include sub-1-V operability, Ioff partial-power-down support, tpd ≤ 2.8 ns at 1.8 V, bus-hold elimination of external resistors, and TSSOP-48 (DGG) package compatibility with 0.5-mm pitch PCB layouts.

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 need for external biasing.

It supports mixed-mode signal operation via 3.6-V tolerant I/O while powered from 0.8-V to 2.7-V VCC, with Ioff protection enabling safe backdrive during partial power-down. Timing is characterized down to 0.8 V, with fmax = 250 MHz at 1.8 V and setup/hold times as low as 0.6 ns / 0.4 ns.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package, 12.5 mm × 6.1 mm × 1.2 mm max height, 0.5-mm lead pitch, 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 SN74LVC16374DGGR and SN74AVC16374DGGR, the SN74AUCH16374 uniquely supports sub-1-V operation and integrated bus-hold-critical for battery-powered sensor nodes and mixed-voltage FPGA interposers where BOM reduction and voltage scalability are design priorities.

Availability

SN74AUCH16374 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA-based test equipment, low-power sensor hubs, and memory interface buffers requiring stable component supply and long-term manufacturability.

Supply support for SN74AUCH16374 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 experience in high-reliability industrial and automotive ICs.

The SN74AUCH16374 belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for low-voltage, high-speed register and bus-interface applications in space-constrained, power-sensitive systems.

FAQ

What is the minimum operating voltage for the SN74AUCH16374?

The SN74AUCH16374 is fully specified down to 0.8 V VCC, with guaranteed timing and logic functionality across the entire 0.8-V to 2.7-V range. Its design is optimized for 1.65-V to 1.95-V operation, making it ideal for modern 1.8-V systems and emerging sub-1-V architectures. The SN74AUCH16374 maintains bus-hold and Ioff functionality even at 0.8 V, unlike many competing logic families.

Does the SN74AUCH16374 require external pull-up or pull-down resistors on its data inputs?

No, the SN74AUCH16374 includes active bus-hold circuitry on all 16 D inputs, which automatically maintains a valid logic state on unused or undriven pins. This eliminates the need for external pull-up or pull-down resistors, reducing BOM cost and PCB area. Using external resistors with the SN74AUCH16374 is explicitly discouraged in the datasheet due to potential interference with bus-hold behavior.

Can the SN74AUCH16374 be used in mixed-voltage systems with 3.3-V peripherals?

Yes, the SN74AUCH16374 supports 3.6-V tolerant I/O while operating from a 1.8-V VCC supply, enabling direct connection to 3.3-V or 2.5-V buses without level-shifting components. Its inputs accept voltages up to 3.6 V regardless of VCC, and outputs drive to valid logic levels compatible with standard CMOS thresholds. This capability is fully characterized and guaranteed in the SN74AUCH16374 datasheet.

How does the Ioff feature of the SN74AUCH16374 protect the system during power sequencing?

The Ioff feature in the SN74AUCH16374 disables all outputs when VCC = 0 V, preventing damaging current backflow from live I/O lines into the unpowered device. This is essential for hot-swap, partial-power-down, and multi-rail systems where logic sections may power up/down independently. The SN74AUCH16374 guarantees Ioff leakage ≤ ±10 µA, meeting JESD78 Class II latch-up immunity requirements.

What package options are available for the SN74AUCH16374, and which one corresponds to SN74AUCH16374DGGR?

The SN74AUCH16374DGGR uses the TSSOP-48 (DGG) package: 12.5 mm × 6.1 mm, 1.2-mm maximum height, 0.5-mm lead pitch, JEDEC MO-153 compliant. Other variants include SN74AUCH16374DGVR (TVSOP-48, DGV), and ball-grid array versions (GQL/ZQL). The DGG package offers robust thermal performance (θJA = 70°C/W) and is widely supported in automated assembly processes.