Texas Instruments SN74AUC1G240DBVR

Overview

SN74AUC1G240DBVR from Texas Instruments is a single noninverting buffer/driver with 3-state output, designed for 1.65-V to 1.95-V V_CC operation and 3.6-V I/O tolerance. It delivers ±8-mA output drive at 1.8 V, achieves 2.5-ns max propagation delay, and supports partial-power-down via I_off. It is used in low-voltage bus interface and signal isolation applications in portable and space-constrained electronics.

For engineers reviewing the SN74AUC1G240DBVR datasheet, SN74AUC1G240DBVR pinout, SN74AUC1G240DBVR application, or SN74AUC1G240DBVR equivalent, key selection criteria include 3-state control timing (t_en/t_dis), sub-1-V operability, I_off current (<±10 µA), and SOT-23 (DBV) package compatibility with high-density PCB layouts.

Technical Context

This device implements a single-channel noninverting buffer with active-low 3-state enable logic: output Y follows input A when OE is low, and enters high-impedance state when OE is high. Its I_off circuitry blocks current flow during partial power-down, enabling safe mixed-voltage domain interfacing.

Optimized for 1.8-V systems, it operates across 0.8-V to 2.7-V V_CC, supports 3.6-V tolerant I/O, and meets JESD 78 Class II latch-up (>100 mA) and JESD 22 ESD standards (2000-V HBM, 200-V MM, 1000-V CDM).

Key Specifications

Pinout & Package

SOT-23 (DBV) package: 5-pin, 1.45-mm max height, 2.9-mm × 1.6-mm body, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G240DBVR and NC7SZ240P5X, the SN74AUC1G240DBVR offers the fastest propagation delay at 1.8 V, lowest operational V_CC floor (0.8 V), and smallest package footprint among SOT-23-packaged equivalents-making it optimal for next-generation ultra-low-power, high-density portable systems.

Availability

SN74AUC1G240DBVR is available at Aetrix Electronics and suitable for mobile baseband interface, low-power sensor hub, and portable display data bus applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SN74AUC1G240DBVR 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 digital signal technologies, with decades of innovation in low-power logic and interface solutions.

The SN74AUC1G240DBVR belongs to TI's AUC ultra-low-voltage logic family, engineered for high-speed, low-noise signal buffering in battery-powered and space-constrained applications where sub-1-V operation and minimal I_CC are critical.

FAQ

What is the minimum supply voltage at which SN74AUC1G240DBVR guarantees functional operation?

The SN74AUC1G240DBVR is fully specified down to 0.8 V V_CC, with guaranteed timing and DC parameters across –40°C to 85°C. While it may operate below 0.8 V in some conditions, TI does not characterize or warrant performance below this limit. For reliable sub-1-V designs, use 0.8 V as the validated floor.

How should the OE pin of SN74AUC1G240DBVR be handled during power-up to ensure a known output state?

To guarantee high-impedance output at power-up, OE must be held high until V_CC stabilizes. TI recommends tying OE to V_CC through a pullup resistor; the minimum value depends on the driver's sink capability - typically 10 kΩ suffices for most microcontroller-driven systems. Avoid floating OE.

Does SN74AUC1G240DBVR support hot-swap or partial-power-down operation, and how is it implemented?

Yes, SN74AUC1G240DBVR supports partial-power-down via its I_off circuitry. When V_CC = 0 V, I_off limits current to ±10 µA even with inputs or outputs biased to 2.7 V, preventing damaging backflow. This enables safe insertion into live backplanes or modular systems with staggered power sequencing.

What is the maximum capacitive load SN74AUC1G240DBVR can drive while maintaining its 2.5-ns propagation delay specification?

The 2.5-ns max t_pd is specified at CL = 30 pF and V_CC = 1.8 V. Driving loads >30 pF increases delay nonlinearly - e.g., at 50 pF, t_pd rises to ~3.4 ns. For timing-critical paths, keep total load (trace + receiver + probe) ≤30 pF or recalculate using TI's loaded delay curves in the datasheet Figure 1.

Can SN74AUC1G240DBVR be used to translate signals between 1.2-V and 3.3-V logic domains?

Yes - SN74AUC1G240DBVR accepts 1.2-V inputs (within its 0.35×V_CC V_IL threshold at V_CC = 1.8 V) and drives 3.3-V-tolerant outputs (3.6-V max). However, it requires V_CC = 1.8 V to operate; it does not generate 3.3-V levels. Use it as a 1.2-V-to-1.8-V buffer feeding a downstream 3.3-V interface, not as a direct 1.2-V-to-3.3-V translator.