Texas Instruments SN74AVC16244DGVR

Overview

SN74AVC16244DGVR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V operation in memory address, clock, and bus interface applications. It features Dynamic Output Control (DOC™), Ioff partial-power-down support, ±24-mA dynamic drive at 2.5 V, and overvoltage-tolerant I/O up to 4.6 V. Used in high-density DDR memory subsystems and FPGA I/O expansion.

For engineers reviewing the SN74AVC16244DGVR datasheet, SN74AVC16244DGVR pinout, SN74AVC16244DGVR application, or SN74AVC16244DGVR equivalent, key selection criteria include 3-state timing (tdis = 3.5 ns max at 3.3 V), mixed-voltage interoperability (1.2–3.6 V supply), DOC-enabled noise suppression, and TVSOP-48 package compatibility with space-constrained PCB layouts.

Technical Context

The SN74AVC16244DGVR implements four independent 4-bit buffers, each with active-low OE control and true (noninverting) output logic. Its DOC™ circuit dynamically modulates output impedance during signal transitions-initially lowering impedance for fast edge drive, then raising it to suppress switching noise without degrading propagation delay.

It supports partial-power-down via Ioff, which disables outputs and blocks current backflow when VCC = 0 V. Input and output pins tolerate voltages up to 4.6 V regardless of VCC, enabling safe interfacing between 1.8-V, 2.5-V, and 3.3-V domains without level shifters.

Key Specifications

Pinout & Package

SN74AVC16244DGVR uses a 48-pin TVSOP (DGV) package: 7.1 mm × 4.4 mm × 1.2 mm body, 0.4-mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1, and Q1 pin-1 orientation in tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74AVC16244DGVR, the DGGR offers identical logic and timing but trades space efficiency for slightly better thermal performance, while the LVC16244ADGVR sacrifices DOC™-enabled noise control and Ioff robustness for marginal BOM cost reduction-making SN74AVC16244DGVR optimal for high-reliability, high-density, mixed-voltage embedded systems.

Availability

SN74AVC16244DGVR is available at Aetrix Electronics and suitable for DDR memory subsystems, FPGA I/O expansion, industrial bus interfaces, and high-speed clock distribution requiring stable component supply and long-term lifecycle continuity.

Supply support for SN74AVC16244DGVR 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 over 50 years of innovation in high-performance digital interfaces.

The AVC logic family-including SN74AVC16244DGVR-is engineered for low-voltage, high-speed bus interface applications demanding noise resilience, mixed-voltage interoperability, and power-aware design in memory, computing, and industrial control systems.

FAQ

What is the minimum VCC voltage required for functional operation of the SN74AVC16244DGVR?

The SN74AVC16244DGVR operates functionally down to 1.4 V VCC under recommended conditions. While it retains data at 1.2 V, guaranteed logic operation-including specified tpd, VOH/VOL, and Ioff behavior-begins at 1.4 V. This makes SN74AVC16244DGVR compatible with modern low-power SoCs and battery-backed memory controllers that scale supply voltage dynamically.

Does the SN74AVC16244DGVR support hot-swap or live insertion into a powered system?

Yes, the SN74AVC16244DGVR supports hot-swap via its Ioff circuitry and overvoltage-tolerant I/O. When VCC = 0 V, Ioff limits input/output leakage to ±10 µA, preventing damaging back-current flow. Combined with ±0.5 V to 4.6 V I/O tolerance, this enables safe insertion into live 3.3-V or 2.5-V backplanes-common in modular test equipment and telecom line cards using SN74AVC16244DGVR for bus isolation.

How does the DOC™ circuit in the SN74AVC16244DGVR reduce noise without increasing propagation delay?

The DOC™ circuit in SN74AVC16244DGVR uses dual-stage output driver control: initial low-impedance phase delivers fast edge rate for minimal tpd (<1.7 ns), followed by rapid impedance increase to damp ringing and crosstalk. This two-phase behavior-verified in Figure 1's VOL/IOL curves-reduces SSN by up to 50% versus fixed-drive buffers while maintaining the same propagation specification, making SN74AVC16244DGVR ideal for noise-sensitive DDR and high-speed serial link interfaces.

Can the SN74AVC16244DGVR be used to interface a 1.8-V FPGA with a 3.3-V ADC without external level shifters?

Yes. The SN74AVC16244DGVR's inputs and outputs tolerate –0.5 V to 4.6 V independently of VCC, allowing direct connection between 1.8-V FPGA I/Os and 3.3-V ADC data/control lines when powered at 1.8 V. Its 1.65–3.6 V VCC range and 0.35×VCC/0.65×VCC input thresholds ensure reliable logic recognition across both domains-eliminating external translators in SN74AVC16244DGVR-based sensor interface modules.

What is the thermal resistance (θJA) of the SN74AVC16244DGVR in its TVSOP-48 package?

SN74AVC16244DGVR in the TVSOP-48 (DGV) package has a junction-to-ambient thermal resistance (θJA) of 58°C/W, measured per JESD 51 standards on a 1-in² 2-layer board with 2-oz copper. This value assumes standard JEDEC high-K test board conditions; actual θJA in customer layouts depends on copper pour, via count, and airflow-but remains within 10% of 58°C/W for typical 4-layer PCBs with 20% ground plane coverage beneath the SN74AVC16244DGVR footprint.