Nexperia USA Inc. 74LVTH2245D,118

Overview

74LVTH2245D,118 from Nexperia is an octal bidirectional bus transceiver with integrated 30 Ω output termination resistors, 3-state outputs, and bus hold inputs. It operates from 2.7 V to 3.6 V, delivers ±12 mA drive strength, supports 5.5 V-tolerant inputs, and enables direction-controlled data flow between A- and B-side 8-bit buses in high-speed 3.3 V systems such as backplane interfaces and memory expansion modules.

For engineers reviewing the 74LVTH2245D,118 datasheet, 74LVTH2245D,118 pinout, 74LVTH2245D,118 application, or 74LVTH2245D,118 equivalent, key selection criteria include its 30 Ω on-die termination for impedance-matched signaling, bus hold functionality eliminating external pull-ups, TTL-compatible I/O levels, and guaranteed 3-state timing (tPZH/tPLZ ≤ 7.0 ns at 3.3 V) for clean bus arbitration.

Technical Context

This transceiver implements a dual-rail BiCMOS architecture enabling TTL-level input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) while operating from a 3.3 V supply. Its DIR and OE control pins provide independent direction and output enable logic, supporting both synchronous and asynchronous bus handshaking protocols.

The integrated 30 Ω series termination resistors are placed directly at each output driver stage, reducing signal reflections on PCB traces without requiring external components. Bus hold circuitry maintains valid logic states on unused A/B pins with ±75 μA hold current, ensuring robustness during hot-swap or partial-bus initialization.

Key Specifications

Pinout & Package

74LVTH2245D,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; the package is RoHS-compliant and rated for -40 °C to +85 °C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVT2245D,118 and SN74LVC245APWR, the 74LVTH2245D,118 uniquely combines on-die 30 Ω termination, bus hold, and IOFF in a single SO20 package-enabling compact, robust, and hot-swap-capable bus interfaces without supplemental components.

Availability

74LVTH2245D,118 is available at Aetrix Electronics and suitable for backplane routing, memory expansion, hot-swap I/O modules, and legacy peripheral bridging requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for 74LVTH2245D,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 miniaturization in industrial, automotive, and computing applications.

The 74LVTH2245 belongs to Nexperia's LVT/H series of advanced BiCMOS bus interface devices, engineered specifically for noise-immune, high-speed 3.3 V system interconnect with minimal external components.

FAQ

What is the function of the DIR pin on the 74LVTH2245D,118?

The DIR (direction) pin controls data flow direction between the A and B ports. When DIR is LOW, data passes from A0–A7 to B0–B7; when DIR is HIGH, data flows from B0–B7 to A0–A7. This bidirectional capability enables flexible bus arbitration in shared-memory or multi-master systems without external multiplexing logic.

Can the 74LVTH2245D,118 interface directly with 5 V logic devices?

Yes-the 74LVTH2245D,118 features 5.5 V-tolerant inputs, allowing direct connection to 5 V CMOS or TTL outputs without level-shifting circuitry. Its outputs swing rail-to-rail within the 3.3 V supply range and are compatible with 5 V-tolerant inputs on downstream devices, making it ideal for mixed-voltage system bridging.

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

The bus hold circuitry actively maintains the last-valid logic state on any unused A or B input pin using ±75 μA internal feedback current. This prevents floating inputs from drifting to indeterminate voltages, removing the need for external pull-up or pull-down resistors while reducing BOM cost and PCB footprint in partially populated bus configurations.

Is the 74LVTH2245D,118 suitable for hot-swap applications?

Yes-its IOFF circuitry blocks current flow between A and B ports when VCC = 0 V, and its live-insertion capability is validated per JEDEC standards. Combined with 3-state outputs and bus hold, this ensures zero bus contention and no back-driving during hot-plug events in modular systems like carrier boards or I/O cages.