Texas Instruments SN74AUC16240DGVR

Overview

SN74AUC16240DGVR from Texas Instruments is a 16-bit inverting 3-state buffer/driver optimized for 1.8-V operation, featuring ±8-mA output drive at 1.8 V, 2-ns max propagation delay (tpd), 20-µA max ICC, and 3.6-V I/O tolerance for mixed-mode signal interfacing in high-density memory and bus systems.

For engineers reviewing the SN74AUC16240DGVR datasheet, SN74AUC16240DGVR pinout, SN74AUC16240DGVR application, or SN74AUC16240DGVR equivalent, key selection criteria include sub-2-ns timing at 1.8 V, Ioff-enabled partial-power-down capability, symmetrical active-low OE control, and TVSOP-48 package compatibility with space-constrained DDR/DDR2 address and control bus layouts.

Technical Context

This device implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs and rail-to-rail 1.8-V CMOS logic compatibility. Its Ioff circuitry actively disables outputs during power-down to prevent backflow current, meeting JESD 78 Class II latch-up requirements (>100 mA).

Designed for 0.8-V to 2.7-V VCC operation-specifically tuned for 1.65-V to 1.95-V range-the SN74AUC16240DGVR supports low-voltage memory address drivers, clock distribution networks, and bidirectional bus transceivers where fast edge rates (<10 ns/V input transition) and high noise immunity are critical.

Key Specifications

Pinout & Package

SN74AUC16240DGVR uses a 48-pin TVSOP (DGV) package measuring 12.6 mm × 6.1 mm × 1.2 mm (max height), JEDEC MO-153 compliant, with 0.4-mm lead pitch and Q1 pin-1 quadrant orientation on tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit inverting buffer applications.

Compared with SN74LVC16240ADGVR and SN74AUP1G04DBVR, the SN74AUC16240DGVR uniquely delivers 2-ns timing at 1.8 V with full 16-bit bus width, Ioff safety, and 3.6-V I/O tolerance-making it the only option qualified for high-speed, mixed-voltage, hot-pluggable memory and control bus designs.

Availability

SN74AUC16240DGVR is available at Aetrix Electronics and suitable for DDR2 memory subsystems, low-power FPGA I/O expansion, and hot-swappable telecom control buses requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant TVSOP packaging.

Supply support for SN74AUC16240DGVR 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-speed interface and low-power logic families.

The SN74AUC16240DGVR belongs to TI's Widebus™ family-designed specifically to increase density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in advanced digital systems.

FAQ

What is the minimum operating voltage for SN74AUC16240DGVR?

The SN74AUC16240DGVR operates down to 0.8 V VCC, with guaranteed functionality across the full 0.8-V to 2.7-V range. At 0.8 V, it maintains valid logic thresholds (VIH = 0 V, VIL = 0 V), enabling use in ultra-low-power retention modes and emerging sub-1-V SoC domains where the SN74AUC16240DGVR provides verified timing and drive capability.

Does SN74AUC16240DGVR support hot-swap applications?

Yes, SN74AUC16240DGVR supports hot-swap via its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V. This allows safe insertion into live backplanes or partially powered systems-critical for telecom line cards and modular server architectures where the SN74AUC16240DGVR serves as a robust, field-proven interface buffer.

Can SN74AUC16240DGVR interface directly between 1.8-V and 3.3-V logic domains?

Yes, SN74AUC16240DGVR accepts up to 3.6-V inputs while operating at 1.8-V VCC, enabling direct 3.3-V-to-1.8-V level translation without external components. Its 3.6-V I/O tolerance ensures reliable signal reception from 3.3-V peripherals, making the SN74AUC16240DGVR ideal for mixed-voltage memory and control bus applications.

What is the thermal resistance (θJA) of the SN74AUC16240DGVR package?

The SN74AUC16240DGVR in TVSOP (DGV) package has a junction-to-ambient thermal resistance (θJA) of 58°C/W, measured per JESD 51-7. This value reflects its compact 12.6 mm × 6.1 mm footprint and six GND pins-enabling sustained 16-bit switching in thermally constrained spaces where the SN74AUC16240DGVR maintains reliable operation below 100°C junction temperature at typical industrial loads.

How should unused inputs be handled on SN74AUC16240DGVR?

All unused inputs on SN74AUC16240DGVR must be tied to either VCC or GND to prevent floating nodes that cause increased ICC, noise susceptibility, or erratic output behavior. TI recommends using pullup/pulldown resistors (e.g., 10-kΩ) for OE and A inputs-especially critical for OE to ensure Hi-Z state at power-up, as specified in the SN74AUC16240DGVR datasheet Section 4.