Texas Instruments SN74LVC1G240DBVRE4

Overview

SN74LVC1G240DBVRE4 from Texas Instruments is a single non-inverting buffer/driver with 3-state output, designed for 1.65-V to 5.5-V V_CC operation. It provides ±24-mA drive strength at 3.3 V, achieves 3.7-ns max propagation delay at 3.3 V, consumes ≤10 µA ICC, and supports I_off for partial-power-down mode - used in bus interface and signal isolation circuits in portable and low-power embedded systems.

For engineers reviewing the SN74LVC1G240DBVRE4 datasheet, SN74LVC1G240DBVRE4 pinout, SN74LVC1G240DBVRE4 application, or SN74LVC1G240DBVRE4 equivalent, key selection criteria include 3-state control timing (t_en/t_dis), I_off leakage under power-down, input overvoltage tolerance to 5.5 V, and SOT-23-5 package compatibility with space-constrained PCB layouts.

Technical Context

This device implements a single-channel non-inverting logic buffer with active-low 3-state enable control (OE high disables output). Its I_off circuitry prevents backflow current when V_CC = 0 V, enabling safe hot-insertion and partial-power-down operation in mixed-voltage systems.

The SN74LVC1G240DBVRE4 operates across 1.65–5.5 V supply range, accepts inputs up to 5.5 V independent of V_CC, and maintains specified VOH/VOL across all V_CC points - supporting level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V domains without external biasing.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.15 mm body, surface-mount, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G240DBVRE4, SN74LVC1G125DBVR omits I_off - critical for power-gated systems - while 74LVC1G17GW,125 trades 0.7-ns speed penalty and higher thermal impedance for alternate packaging, limiting use in thermally constrained or dynamically powered applications.

Availability

SN74LVC1G240DBVRE4 is available at Aetrix Electronics and suitable for industrial sensor interface, portable device power management, USB peripheral enumeration, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for SN74LVC1G240DBVRE4 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The SN74LVC1G240 belongs to TI's LVC logic family - engineered for low-voltage operation, high noise immunity, and seamless voltage-level translation across mixed-supply systems in space- and power-constrained applications.

FAQ

What is the maximum propagation delay of SN74LVC1G240DBVRE4 at 3.3 V?

The maximum propagation delay (t_pd) of SN74LVC1G240DBVRE4 is 3.7 ns at V_CC = 3.3 V, CL = 15 pF, and TA = 25°C. This value is confirmed in the Switching Characteristics table of the official datasheet (SCES305I), ensuring reliable timing margins for high-speed digital interfaces. SN74LVC1G240DBVRE4 maintains this performance across –40°C to 85°C when operated within recommended conditions.

Does SN74LVC1G240DBVRE4 support partial-power-down operation?

Yes, SN74LVC1G240DBVRE4 supports partial-power-down operation via its I_off circuitry, which limits input/output leakage to ±10 µA when V_CC = 0 V. This feature prevents damaging back-current flow in systems where logic domains power up/down asynchronously - a key requirement in battery-backed subsystems and hot-pluggable modules. SN74LVC1G240DBVRE4 is explicitly characterized for I_off compliance per datasheet Section 6.5.

What is the input voltage tolerance of SN74LVC1G240DBVRE4?

SN74LVC1G240DBVRE4 accepts input voltages from –0.5 V to 5.5 V, regardless of V_CC level - enabling direct interfacing with 5-V signals in 1.8-V or 2.5-V systems without external level shifters. This 5.5-V tolerance is validated across all operating temperatures and is specified in the Absolute Maximum Ratings table. SN74LVC1G240DBVRE4 leverages this capability for robust signal routing in mixed-voltage embedded designs.

What package type and footprint does SN74LVC1G240DBVRE4 use?

SN74LVC1G240DBVRE4 uses the SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.15 mm body size with gull-wing leads, RoHS-compliant (Green, no Sb/Br), and moisture sensitivity level 1 (260°C peak reflow). Pin 1 is marked with a dot; pinout matches TI's standard DBV top view (V_CC, A, GND, Y, OE). SN74LVC1G240DBVRE4 is compatible with standard SOT-23 pick-and-place and reflow processes.

How does the 3-state output of SN74LVC1G240DBVRE4 behave during power-up?

During power-up, SN74LVC1G240DBVRE4 output Y enters a high-impedance state only if OE is held high - but OE is undefined at startup. To guarantee high-Z at power-up, TI recommends tying OE to V_CC via a pullup resistor (value determined by driver sink capability). Without this, transient output states may occur. SN74LVC1G240DBVRE4's I_off and defined power-up behavior make it suitable for systems requiring deterministic bus initialization.