Texas Instruments SN74LVC2244ADGVR

Overview

SN74LVC2244ADGVR from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features two independent 4-bit sections (1A–1Y and 2A–2Y), dual output-enable inputs (1OE, 2OE), 5.5-ns max propagation delay at 3.3 V, and 26-Ω on-die series output resistors-enabling direct interface with high-speed digital buses in industrial control backplanes.

For engineers reviewing the SN74LVC2244ADGVR datasheet, SN74LVC2244ADGVR pinout, SN74LVC2244ADGVR application, or SN74LVC2244ADGVR equivalent, key selection criteria include its I_off support for live insertion, 5.5-V-tolerant inputs enabling mixed-voltage translation, 125°C max operating temperature, and TVSOP-20 package compatibility with space-constrained PCB layouts.

Technical Context

The SN74LVC2244ADGVR implements dual 4-bit noninverting buffers with independent 3-state control per section. Each output stage integrates a calibrated 26-Ω series resistor to suppress overshoot/undershoot without external termination-critical for clean signal integrity on lightly loaded traces.

Its I_off circuitry actively disables input/output paths when V_CC = 0 V, preventing back-drive current during partial power-down. Inputs accept up to 5.5 V regardless of V_CC, supporting bidirectional level translation between 3.3-V logic and legacy 5-V systems.

Key Specifications

Pinout & Package

SN74LVC2244ADGVR uses a 20-pin Thin Very Small Outline Package (TVSOP) with 0.5-mm pitch and 5.00 mm × 4.40 mm body size-optimized for high-density routing and thermal performance in compact embedded modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with SN74LVC244APWR and 74LVC244ABQ, SN74LVC2244ADGVR uniquely combines 5.5-V input tolerance, I_off protection, and TVSOP packaging-making it the only option qualified for space-constrained, hot-pluggable, and mixed-voltage industrial applications.

Availability

SN74LVC2244ADGVR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, automated test equipment, and network switch management interfaces requiring stable component supply and long-term lifecycle support.

Supply support for SN74LVC2244ADGVR 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 connectivity solutions for industrial, automotive, and communications markets.

The SN74LVC2244ADGVR belongs to TI's LVC logic family-designed specifically for low-voltage, high-speed digital interfacing in space- and power-constrained embedded systems.

FAQ

What is the maximum operating temperature for SN74LVC2244ADGVR?

The SN74LVC2244ADGVR is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 and applies across the full 1.65-V to 3.6-V V_CC range. The device's thermal metrics-including R_θJA = 114.7°C/W for the TVSOP package-support reliable performance in sealed enclosures without forced airflow, such as automotive junction boxes or outdoor base station controllers. SN74LVC2244ADGVR maintains full electrical compliance throughout this range.

Does SN74LVC2244ADGVR support hot-plug insertion?

Yes, SN74LVC2244ADGVR supports hot-plug insertion via its I_off feature, which disables input and output paths when V_CC = 0 V. This prevents back-drive current from live backplane traces into the unpowered IC, eliminating risk of latch-up or damage. The I_off leakage is specified at ±10 μA when VI or VO = 5.5 V, meeting IEC 61000-4-2 Level 4 ESD robustness. SN74LVC2244ADGVR is widely deployed in modular industrial I/O systems where field-replaceable cards are inserted without powering down the host chassis.

Can SN74LVC2244ADGVR interface directly with 5-V logic devices?

Yes, SN74LVC2244ADGVR accepts input voltages up to 5.5 V regardless of V_CC level-a feature explicitly documented in the "Inputs Accept Voltages to 5.5 V" bullet of its datasheet. When V_CC = 3.3 V, the inputs remain fully compatible with 5-V TTL and CMOS outputs, enabling direct connection to legacy microcontrollers, sensors, or FPGAs without external level-shifting circuitry. SN74LVC2244ADGVR's output VOH/VOL levels remain compliant with 3.3-V logic thresholds, preserving noise margins in mixed-voltage systems.

What is the purpose of the 26-Ω series resistors on SN74LVC2244ADGVR outputs?

The 26-Ω on-die series resistors integrated into each SN74LVC2244ADGVR output are designed to dampen signal reflections and suppress overshoot/undershoot on transmission lines. At 3.3 V, typical VOLP (ground bounce) is <0.8 V and VOHV (VOH undershoot) exceeds 2 V-values achieved through this internal impedance matching. These resistors eliminate the need for external 22–33-Ω series terminators, reducing PCB real estate, BOM cost, and layout complexity in high-speed digital interfaces like memory address/data buses or FPGA configuration links. SN74LVC2244ADGVR delivers this benefit without sacrificing drive strength (±12 mA).

How does the dual-output-enable architecture of SN74LVC2244ADGVR improve system design?

SN74LVC2244ADGVR's dual OE inputs (1OE and 2OE) allow independent control of two 4-bit buffer groups-enabling selective isolation of subsystems without affecting others. For example, in a test instrument, one OE can gate sensor data acquisition while the other enables actuator command outputs, simplifying timing-critical sequencing and reducing software overhead. This architecture avoids bus contention risks inherent in single-OE octal buffers and supports fault containment: if one peripheral fails, its associated buffer group can be disabled without disrupting adjacent channels. SN74LVC2244ADGVR thus enhances reliability and flexibility in modular digital I/O designs.