Nexperia USA Inc. 74LVT2245D,118

Overview

74LVT2245D,118 from Nexperia is an octal 3-state bidirectional transceiver with integrated 30 Ω output termination resistors, operating from 2.7 V to 3.6 V supply. It features direction control (DIR), output enable (OE), bus hold inputs, and overvoltage-tolerant inputs up to 5.5 V. Used in 3.3 V LVTTL bus interface applications requiring impedance-matched signal integrity, such as backplane data routing and memory expansion subsystems.

For engineers reviewing the 74LVT2245D,118 datasheet, 74LVT2245D,118 pinout, 74LVT2245D,118 application, or 74LVT2245D,118 equivalent, key selection criteria include its 30 Ω on-die termination, ±12 mA drive strength, 3.2 ns typical propagation delay at 3.3 V, bus hold functionality eliminating external pull-ups, and SO20 package compatibility with legacy 74-series layouts.

Technical Context

This BiCMOS transceiver implements dual 8-bit bidirectional data paths (A↔B) controlled by DIR and OE pins. Direction is determined synchronously: when OE is LOW and DIR is LOW, data flows A→B; when OE is LOW and DIR is HIGH, data flows B→A. Outputs enter high-impedance state when OE is HIGH, independent of DIR.

Each I/O pin integrates bus hold circuitry (IBHL/IBHH ≥75 μA) and supports live insertion/extraction. The 30 Ω series termination is internal to each output driver stage, reducing external component count for controlled-impedance PCB traces. Input clamping and IOFF protection enable partial power-down operation with VCC = 0 V.

Key Specifications

Pinout & Package

74LVT2245D,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bidirectional transceiver applications.

Compared with 74LVTH2245D,118 and SN74LVC245APWR, the 74LVT2245D,118 uniquely combines integrated 30 Ω termination and bus hold in a single SO20 package-reducing component count and layout effort for mid-speed 3.3 V bus interfaces where signal integrity and design simplicity are prioritized over peak performance or lowest quiescent current.

Availability

74LVT2245D,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, backplane data routing, hot-swappable I/O modules, and mixed-voltage system bridges requiring stable component supply and consistent SO20 footprint compatibility.

Supply support for 74LVT2245D,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, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization.

The 74LVT2245D,118 belongs to Nexperia's LVT family of 3.3 V TTL-compatible logic ICs, designed specifically for high-speed, low-noise bus interfacing in industrial, computing, and communications equipment.

FAQ

What is the function of the DIR pin on the 74LVT2245D,118?

The DIR (direction) pin is an active-HIGH control input that determines data flow direction when the device is enabled. With OE LOW, DIR LOW configures the transceiver for A→B data transfer, while DIR HIGH configures it for B→A transfer. DIR has no effect when OE is HIGH, as all outputs remain in high-impedance state regardless of DIR state.

Can the 74LVT2245D,118 safely interface with 5 V logic signals?

Yes-the 74LVT2245D,118 features overvoltage-tolerant inputs rated to 5.5 V, allowing direct connection to 5 V CMOS or TTL outputs without external clamping or level-shifting circuitry. Its outputs swing between 0 V and VCC (3.3 V), so driving 5 V inputs requires verification of the receiving device's input threshold compatibility.

How does the bus hold feature eliminate external pull-up resistors?

Each data input (A0–A7, B0–B7) incorporates internal bus hold circuitry that sources or sinks ≥75 μA to maintain the last-valid logic state when the pin is floating. This active retention prevents undefined states and removes the need for external pull-up or pull-down resistors on unused or unterminated bus lines.

Is the 30 Ω termination resistor located on the input or output side of the I/O buffer?

The 30 Ω termination is a series resistor integrated into each output driver stage-placed between the internal output transistor and the I/O pin. It is not present on input paths. This configuration damps signal reflections on transmission lines driven by the device, improving edge integrity without affecting input signal reception.