Texas Instruments SN74LV244ADGVR

Overview

SN74LV244ADGVR from Texas Instruments is an octal 3-state buffer/driver IC designed for bidirectional signal buffering in bus-oriented systems. It operates from 2 V to 5.5 V, delivers ≤6.5 ns propagation delay at 5 V, supports mixed-mode voltage operation across ports, features Ioff partial-power-down capability, and drives up to ±16 mA per output - enabling robust interfacing between microcontrollers and peripherals in telecom infrastructure and LED display drivers.

For engineers reviewing the SN74LV244ADGVR datasheet, SN74LV244ADGVR pinout, SN74LV244ADGVR application, or SN74LV244ADGVR equivalent, key selection criteria include its dual 4-bit enable-controlled output groups, 3.3-V/5-V logic compatibility, ground-bounce and undershoot performance (VOLP < 0.8 V, VOHV > 2.3 V), thermal resistance (RθJA = 115.9°C/W), and TVSOP-20 package footprint.

Technical Context

The SN74LV244ADGVR implements two independent 4-bit non-inverting buffer sections, each with dedicated active-low output-enable (OE) control. Its balanced CMOS 3-state outputs support high-current sourcing and sinking (±16 mA at 3–5.5 V), enabling reliable driving of capacitive loads ≤50 pF while maintaining signal integrity on long PCB traces or inter-board connectors.

It integrates Ioff circuitry that disables all outputs when VCC = 0 V, preventing backflow current during partial power-down. Input thresholds scale with VCC (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC), and standard CMOS inputs require fast transitions (≤20 ns/V at 4.5–5.5 V) to avoid oscillation or excess power draw.

Key Specifications

Pinout & Package

SN74LV244ADGVR is housed in a 20-pin TVSOP (DGV) package measuring 5.00 mm × 6.4 mm, with exposed pad optional for thermal enhancement. Pin numbering follows standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APW and 74LVX244M, SN74LV244ADGVR delivers optimal balance of speed (6.5 ns), thermal efficiency (115.9°C/W), and system-level safety (Ioff, mixed-voltage tolerance), making it preferred for new designs targeting telecom, industrial, and display applications.

Availability

SN74LV244ADGVR is available at Aetrix Electronics and suitable for server memory buffering, LED display column driving, telecom line card interfacing, and industrial motor control bus isolation requiring stable component supply and long-term production continuity.

Supply support for SN74LV244ADGVR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74LV244ADGVR belongs to TI's LV logic family, engineered for high-speed, low-voltage operation with robust noise immunity and mixed-voltage interoperability - specifically targeting bus buffering, memory interfacing, and peripheral expansion in space-constrained, thermally demanding systems.

FAQ

What is the maximum propagation delay of SN74LV244ADGVR at 3.3 V?

The maximum propagation delay (tpd) of SN74LV244ADGVR is 13.5 ns at VCC = 3.3 V, CL = 50 pF, and over the full operating temperature range (–40°C to 125°C). This value is measured from input transition to valid output transition under worst-case conditions and confirms timing compliance for 3.3-V bus applications such as FPGA-to-peripheral interfaces. SN74LV244ADGVR maintains this specification across its entire temperature range without derating.

Does SN74LV244ADGVR support partial power-down mode?

Yes, SN74LV244ADGVR supports partial power-down mode via its Ioff feature. When VCC = 0 V, all outputs enter high-impedance state and leakage current is limited to ±5 µA maximum, preventing current backflow from live system buses into unpowered sections. This behavior is explicitly characterized in the Electrical Characteristics table and enables safe hot-swap and power-gating implementations - a key differentiator versus non-Ioff buffers like 74LVX244M.

What is the recommended bypass capacitor for SN74LV244ADGVR?

Texas Instruments recommends a 0.1-µF ceramic capacitor placed as close as possible to the VCC (Pin 20) and GND (Pin 10) pins of SN74LV244ADGVR. This capacitor must be physically adjacent to the device to minimize loop inductance and suppress high-frequency supply noise generated during output switching. For systems with multiple supply domains or stringent EMI requirements, paralleling a 1-µF capacitor is acceptable - but the 0.1-µF unit remains mandatory for SN74LV244ADGVR stability.

Can SN74LV244ADGVR drive LEDs directly?

Yes, SN74LV244ADGVR can drive LEDs directly: each output sources or sinks up to ±16 mA at VCC = 4.5–5.5 V, sufficient for standard indicator or segment LEDs. To ensure proper current limiting, connect the LED anode to VCC and cathode to an SN74LV244ADGVR output (for sink-driving), or use series resistor calculation based on VOL (≤0.55 V at 16 mA) and forward voltage. Do not exceed absolute max output current (±35 mA) or total VCC/GND current (±70 mA) limits specified in the Absolute Maximum Ratings.

What is the input voltage threshold behavior of SN74LV244ADGVR across VCC?

SN74LV244ADGVR uses scalable CMOS input thresholds: VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC across the full 2–5.5 V supply range. At VCC = 3.3 V, this yields VIH(min) = 2.31 V and VIL(max) = 0.99 V - values confirmed in the Noise Characteristics table. This ratio-based design ensures noise margin preservation regardless of supply variation and eliminates need for external threshold-setting components, unlike fixed-threshold buffers.