Texas Instruments SN74LVC1G240YZPR

Overview

SN74LVC1G240 from Texas Instruments is a single-channel inverting buffer/driver with 3-state output, designed for signal conditioning and bus isolation in space-constrained digital systems. It operates from 1.65V to 5.5V, delivers ±24mA drive at 3.3V, achieves 3.7ns max propagation delay, and supports 5.5V-tolerant inputs - enabling level translation in mixed-voltage interfaces such as microcontroller GPIO expansion or sensor interface staging.

For engineers reviewing the SN74LVC1G240 datasheet, SN74LVC1G240 pinout, SN74LVC1G240 application, or SN74LVC1G240 equivalent, key selection criteria include its DSBGA-5 (YZP) ultra-miniature footprint, Ioff-enabled live insertion capability, low 10μA ICC quiescent current, and precise 3-state timing parameters (ten/tdis) critical for synchronous bus control and reset hold functions.

Technical Context

The SN74LVC1G240 implements a CMOS-based inverting logic gate with active-low output-enable control, where OE = LOW enables inverted A→Y transmission and OE = HIGH forces high-impedance output. Its balanced push-pull output stage provides symmetrical sourcing/sinking capability up to ±24mA at 3.3V, supporting clean signal integrity into light capacitive loads (≤50pF).

It features over-voltage tolerant inputs (up to 5.5V independent of VCC), partial-power-down protection (Ioff ≤ ±10μA when VCC = 0V), and input transition rate compliance (5 ns/V at 5V) - making it suitable for hot-swap interfaces, controller reset sequencing, and voltage-level bridging between 1.8V/3.3V/5V domains without external level shifters.

Key Specifications

Pinout & Package

SN74LVC1G240 YZP package is a 5-pin DSBGA (Die Size Ball Grid Array) measuring 1.39mm × 0.89mm, optimized for ultra-dense PCB layouts and automated assembly. It uses solder-ball terminations compatible with standard reflow profiles and offers superior thermal resistance (RθJA = 132°C/W) versus SOT-23 or SC70 alternatives.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G240, SN74LVC1G04YZPR omits critical 3-state control needed for bus arbitration, while NC7SZ240M5X trades 0.8mm² area and 0.8ns speed for marginally better Ioff - making SN74LVC1G240 the optimal balance of miniaturization, timing performance, and functional completeness for modern embedded designs.

Availability

SN74LVC1G240 is available at Aetrix Electronics and suitable for LED indicator control, digital signal redriving, controller reset hold, transmission line termination, and mixed-voltage interface staging requiring stable component supply across automotive, industrial, and consumer electronics production cycles.

Supply support for SN74LVC1G240 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 logic solutions, with decades of expertise in high-reliability, low-power, and miniaturized IC design.

The SN74LVC1G240 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for voltage-flexible, space-efficient digital interfacing in portable, automotive, and industrial systems where board area, power, and signal fidelity are tightly constrained.

FAQ

What is the recommended pull-up resistor value for OE on SN74LVC1G240?

The OE pin must be pulled up to VCC to ensure high-impedance output during power-up. The minimum resistor value depends on the current-sinking capability of the driving circuit - typically 10kΩ suffices for most microcontroller GPIOs. For stronger drivers, values down to 1kΩ may be used, provided the resulting current stays within the OE pin's absolute maximum rating (±20mA). Always verify against the specific controller's sink specification.

Can SN74LVC1G240 drive a 5V-tolerant input while operating at 1.8V VCC?

Yes. SN74LVC1G240 accepts input voltages up to 5.5V regardless of VCC level, including when VCC = 1.8V. This over-voltage tolerance allows it to interface directly with 5V sensors or legacy peripherals without external level-shifting components - a key advantage confirmed in Section 5.3 (Recommended Operating Conditions) and Section 7.3.5 of the datasheet.

Does SN74LVC1G240 support hot-swap or live-insertion applications?

Yes. SN74LVC1G240 includes Ioff circuitry that disables all outputs when VCC = 0V, limiting leakage current to ±10μA. This prevents back-driving and current flow between powered and unpowered circuit sections - a requirement for hot-swap compliance per JESD78 Class II latch-up immunity (>100mA) and safe insertion into live backplanes or modular systems.

What is the maximum capacitive load SN74LVC1G240 can drive while maintaining specified timing?

SN74LVC1G240 maintains full AC specifications (including 3.7ns max tpd) with CL = 15pF. It can reliably drive up to 50pF while remaining within datasheet limits, though propagation delay increases - e.g., tpd rises to 4.5ns at 3.3V/50pF. For loads >50pF, TI recommends adding a series damping resistor near the output to suppress ringing and maintain signal integrity.

Is SN74LVC1G240 pin-compatible with other 5-pin logic devices in DSBGA packaging?

No. While SN74LVC1G240 YZP uses a standardized 5-ball DSBGA footprint, ball assignment (OE-A-GND-Y-VCC) is function-specific and differs from non-inverting buffers (e.g., SN74LVC1G125), inverters (SN74LVC1G04), or non-inverting drivers. Direct replacement requires matching both pinout and logic function - always verify against the exact device's Pin Configuration table (Figure 4-2) before PCB reuse.