Nexperia USA Inc. 74LVTH2245DB,112

Overview

74LVTH2245DB,112 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 two 8-bit buses in high-speed 3.3 V systems such as backplane interfaces and memory expansion modules.

For engineers reviewing the 74LVTH2245DB,112 datasheet, 74LVTH2245DB,112 pinout, 74LVTH2245DB,112 application, or 74LVTH2245DB,112 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 behavior during power-up/power-down sequences.

Technical Context

This transceiver implements a dual-bus architecture with independent DIR (direction) and OE (output enable) control signals. Direction is determined by DIR: when LOW, data flows A→B; when HIGH, B→A. OE overrides DIR - a HIGH on OE forces all outputs into high-impedance state regardless of DIR or input states.

Each I/O pin features bus-hold circuitry that maintains last-valid logic state without external biasing, and IOFF protection ensures minimal leakage (<±100 μA) when VCC = 0 V. The BiCMOS process enables fast propagation delays (tPLH/tPHL ≤ 4.6 ns at VCC = 3.6 V) while sustaining ±12 mA drive into terminated lines.

Key Specifications

Pinout & Package

74LVTH2245DB,112 is supplied in a 20-pin SO20 (SOT163-1) plastic small outline package with 7.5 mm body width and 1.27 mm lead pitch. The package is RoHS-compliant and rated for -40 °C to +85 °C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVTH2245DB,112, the 74LVT2245D,112 lacks integrated termination and bus-hold, increasing design overhead; SN74LVC2245APWR offers higher drive but sacrifices 5 V tolerance and bus-hold, limiting use in mixed-voltage or sparse-bus environments.

Availability

74LVTH2245DB,112 is available at Aetrix Electronics and suitable for backplane routing, memory expansion, hot-swap module interfaces, and industrial bus bridging requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for 74LVTH2245DB,112 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVTH2245 belongs to Nexperia's LVT/H series of advanced 3.3 V logic transceivers designed specifically for high-speed, low-noise, mixed-voltage system interconnects with integrated signal integrity features.

FAQ

What is the function of the DIR and OE pins on the 74LVTH2245DB,112?

DIR controls data direction: LOW enables A→B flow, HIGH enables B→A flow. OE is active-HIGH output enable - when HIGH, all A/B outputs enter high-impedance state regardless of DIR or input values. Both pins are CMOS-compatible and tolerate 5.5 V inputs, allowing direct connection to 5 V controllers without level shifting.

Does the 74LVTH2245DB,112 require external pull-up resistors on unused inputs?

No. Each A and B input features integrated bus-hold circuitry that actively maintains the last-valid logic state with ±75–150 μA holding current. This eliminates the need for external pull-up or pull-down resistors on unused pins, reducing component count and PCB footprint while improving noise immunity in sparse-bus configurations.

Can the 74LVTH2245DB,112 interface directly with 5 V logic devices?

Yes. Its inputs are overvoltage tolerant up to 5.5 V, meaning they can safely accept 5 V logic signals without damage or level translation. However, its outputs swing only to VCC (max 3.6 V), so driving 5 V-tolerant inputs is acceptable, but driving true 5 V CMOS loads may require verification of VIH thresholds in the receiving device.

How does the 30 Ω on-die termination improve signal integrity?

The 30 Ω series termination resistor is placed inside each output driver, matching typical PCB trace impedances in compact layouts. This damps signal reflections at the source, reducing overshoot, undershoot, and ringing - especially critical in point-to-point or short-drop bus topologies operating above 100 MHz, without requiring discrete resistors or additional layout area.