Texas Instruments SN74LVT240ADGVR

Overview

SN74LVT240ADGVR from Texas Instruments is an octal noninverting buffer/line driver IC designed for 3.3-V V_CC operation with 5-V tolerant inputs and outputs, supporting mixed-mode signal interfacing between 3.3-V logic and legacy 5-V systems. It features dual 4-bit channels, independent output-enable (OE) controls, I_off protection, and power-up 3-state functionality. Used in backplane interface, bus buffering, and hot-pluggable I/O expansion modules.

For engineers reviewing the SN74LVT240ADGVR datasheet, SN74LVT240ADGVR pinout, SN74LVT240ADGVR application, or SN74LVT240ADGVR equivalent, key selection criteria include 3.3-V supply compatibility with 5-V I/O tolerance, guaranteed hot-insertion support via I_off and power-up 3-state, low ground bounce (<0.8 V), and TSSOP-20 packaging for high-density PCB layouts.

Technical Context

This device implements two independent 4-bit noninverting buffer sections, each controlled by a dedicated OE input that places outputs in high-impedance state when asserted high. Logic propagation occurs only when OE is low, enabling bidirectional bus isolation without external direction control.

It integrates I_off circuitry to disable outputs during power-down, preventing backflow current when V_CC = 0 V and inputs/outputs are at 0–4.5 V. Power-up 3-state ensures outputs remain high-Z while V_CC ramps from 0 to 1.5 V, eliminating bus contention during system initialization.

Key Specifications

Pinout & Package

SN74LVT240ADGVR is housed in a 20-pin TVSOP (Thin Very Small Outline Package) with 0.4-mm lead pitch, 2-mm maximum height, and JEDEC MO-153 compliant footprint. The package supports fine-pitch routing and automated assembly in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVT240ADGVR, SN74LVC240APW lacks 5-V I/O tolerance and requires strict 3.3-V-only operation, whereas SN74LVTH240PW matches all key specs and pinout, offering verified functional equivalence in hot-swap and mixed-voltage designs.

Availability

SN74LVT240ADGVR is available at Aetrix Electronics and suitable for backplane bus buffering, hot-pluggable I/O modules, and legacy system interface adapters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LVT240ADGVR 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 technologies, with decades of experience in high-reliability logic and interface solutions.

SN74LVT240ADGVR belongs to the LVT (Low-Voltage BiCMOS Technology) family, engineered for high-speed, mixed-voltage interfacing in telecommunications, industrial control, and computing infrastructure where 3.3-V logic must coexist with legacy 5-V systems.

FAQ

What is the maximum input voltage rating for SN74LVT240ADGVR?

The SN74LVT240ADGVR supports an absolute maximum input voltage of 5.5 V across all pins, enabling direct connection to 5-V TTL buses without external clamping or level-shifting circuitry. This 5-V tolerance applies regardless of V_CC being 2.7–3.6 V, making SN74LVT240ADGVR ideal for mixed-voltage signal bridging.

Does SN74LVT240ADGVR support hot insertion, and how is it implemented?

Yes, SN74LVT240ADGVR fully supports hot insertion via two integrated mechanisms: I_off circuitry disables outputs when V_CC = 0 V to block reverse current flow, and power-up 3-state forces outputs into high-impedance during V_CC ramp-up (0–1.5 V). These features are verified per TI's hot-insertion specifications and eliminate bus contention during live card swaps.

What is the propagation delay of SN74LVT240ADGVR at 3.3-V supply?

At V_CC = 3.3 V ± 0.3 V and T_A = 25°C, SN74LVT240ADGVR exhibits typical propagation delays of t_PLH = 2.2 ns and t_PHL = 2.6 ns, with maximum values of 3.8 ns and 4.0 ns respectively. These values are measured under CL = 50 pF load and confirm SN74LVT240ADGVR's suitability for sub-250-MHz bus timing budgets.

Can SN74LVT240ADGVR operate below 3.3 V, and what is the minimum functional supply?

Yes, SN74LVT240ADGVR is fully specified down to V_CC = 2.7 V, supporting unregulated battery-powered applications. At this minimum supply, it maintains guaranteed VOL ≤ 0.5 V (I_OL = 24 mA), VOH ≥ 2.4 V (I_OH = −8 mA), and t_PLH/t_PHL ≤ 4.6 ns, ensuring reliable operation across its entire recommended range.

What package type and footprint does SN74LVT240ADGVR use?

SN74LVT240ADGVR uses the TVSOP-20 (DGV) package: a 20-pin thin very small outline package with 0.4-mm lead pitch, 4.4-mm width, 6.5-mm length, and 1.2-mm nominal height. Its JEDEC MO-153 compliant footprint enables high-density routing and compatibility with standard SMT assembly processes.