Nexperia USA Inc. 74LVT240D,118

Overview

74LVT240D,118 from Nexperia is an octal inverting 3-state buffer/line driver operating at 3.3 V nominal supply, featuring dual independent output-enable controls (1OE, 2OE), ±32 mA/±64 mA output drive capability, bus-hold inputs eliminating external pull-ups, and 5.5 V-tolerant inputs. It serves as a level-translating, high-drive interface between 3.3 V logic domains and 5 V buses in backplane or motherboard data routing.

For engineers reviewing the 74LVT240D,118 datasheet, 74LVT240D,118 pinout, 74LVT240D,118 application, or 74LVT240D,118 equivalent, key selection criteria include its dual 4-bit enable architecture, 4.3 ns max propagation delay at 3.3 V, IOFF power-down leakage < ±100 μA, -40 °C to +85 °C industrial temperature range, and SO20 (SOT163-1) package compatibility with legacy 74-series footprints.

Technical Context

The 74LVT240D implements BiCMOS logic with separate 4-bit groups: inputs 1A0–1A3 drive outputs 1Y0–1Y3 under 1OE control, while 2A0–2A3 drive 2Y0–2Y3 under 2OE. Each output enables independently places its four outputs into high-impedance state, supporting bidirectional bus sharing without external direction control.

Bus-hold circuitry maintains valid logic states on unused inputs using internal feedback (IBHL = 75–150 μA LOW, IBHH = −150 to −75 μA HIGH), and IOFF protection limits current flow when VCC = 0 V, enabling live insertion/extraction. Input clamping supports 5.5 V tolerance even at 2.7 V VCC, enabling mixed-voltage system interfacing.

Key Specifications

Pinout & Package

74LVT240D,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width, compatible with standard SOIC-20 PCB footprints and reflow soldering profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal inverting buffer applications.

Compared with SN74LVC240APWR and 74ALVT240MTCX, the 74LVT240D,118 uniquely combines 5.5 V input tolerance, bus-hold, IOFF, and ±64 mA drive in a single SO20 package-making it the only choice for ruggedized 3.3 V/5 V mixed-signal interconnect where reliability and design simplicity are critical.

Availability

74LVT240D,118 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, embedded memory interfaces, and backplane routing systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT240D,118 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.

The 74LVT240 belongs to Nexperia's LVT (Low-Voltage TTL) logic family, engineered for 3.3 V systems requiring TTL-compatible drive strength, mixed-voltage interoperability, and robustness in industrial and infrastructure equipment.

FAQ

What is the maximum clock frequency supported by 74LVT240D,118 in a data bus application?

The 74LVT240D,118 has a maximum propagation delay of 4.3 ns at VCC = 3.3 V, supporting reliable operation up to 100 MHz in synchronous bus applications with adequate setup/hold margin. Its 2.5 ns typical delay further enables margin-rich designs at 125 MHz for short trace lengths and controlled loading.

Can 74LVT240D,118 safely interface a 3.3 V FPGA to a 5 V ADC without external level shifters?

Yes - its inputs tolerate up to +5.5 V regardless of VCC (2.7–3.6 V), allowing direct connection of 5 V ADC outputs to 1A/2A pins. Outputs are 3.3 V CMOS-compatible and may require series termination or external pull-ups if driving 5 V TTL inputs, but input-side level shifting is unnecessary.

Does 74LVT240D,118 require external pull-up resistors on unused inputs?

No - integrated bus-hold circuitry (IBHL/IBHH ±75–150 μA) actively maintains valid logic states on unterminated inputs, eliminating the need for external pull-up or pull-down resistors and reducing BOM count and layout complexity.

How does the IOFF feature protect the device during hot-swap operations?

When VCC = 0 V, the IOFF circuit limits current flow between powered outputs (e.g., on a live backplane) and the unpowered IC to ±100 μA, preventing back-powering, latch-up, and damage during live insertion or extraction - a requirement for NEBS-compliant telecom hardware.