Nexperia USA Inc. 74LVTH2245D,112

Overview

74LVTH2245D,112 from Nexperia is an 8-bit bidirectional bus transceiver with integrated 30 Ω output termination resistors, 3-state outputs, and bus hold inputs for unused data lines. It operates from 2.7 V to 3.6 V, delivers ±12 mA drive strength, supports 5.5 V-tolerant inputs, and enables direction control via DIR and output enable via OE. It is used in high-speed 3.3 V LVT logic interfacing between microcontrollers and peripheral buses.

For engineers reviewing the 74LVTH2245D,112 datasheet, 74LVTH2245D,112 pinout, 74LVTH2245D,112 application, or 74LVTH2245D,112 equivalent, key selection criteria include its 30 Ω on-die termination, bus hold functionality eliminating external pull-ups, 5.5 V input tolerance for mixed-voltage systems, and guaranteed tPLH/tPHL ≤ 4.6 ns at 3.3 V.

Technical Context

This transceiver implements a dual-bus bidirectional interface using BiCMOS technology to achieve TTL-compatible switching levels while maintaining 3.3 V supply operation. Its DIR input selects data flow direction (A→B or B→A), and OE independently places all outputs in high-impedance state regardless of DIR status.

The device integrates bus hold circuitry on all A- and B-side I/O pins, actively maintaining last-valid logic state without external components. The 30 Ω series termination resistors are placed between internal drivers and package pins, reducing signal reflections on PCB traces driving controlled-impedance lines.

Key Specifications

Pinout & Package

74LVTH2245D,112 is housed in a plastic small outline package (SO20) with 20 leads and 7.5 mm body width (SOT163-1). Pin 1 is marked by a notch or dot; pin numbering proceeds counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APWR and 74ALVC162245DGG, the 74LVTH2245D,112 uniquely combines 30 Ω series termination, bus hold, and 5.5 V input tolerance in a single 8-bit SO20 package-reducing BOM count and layout complexity for noise-sensitive 3.3 V interconnects.

Availability

74LVTH2245D,112 is available at Aetrix Electronics and suitable for industrial control interfaces, FPGA peripheral bridging, and embedded microcontroller expansion requiring stable component supply, long-term lifecycle support, and consistent parametric performance across -40 °C to +85 °C.

Supply support for 74LVTH2245D,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 delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.

The 74LVTH2245 belongs to Nexperia's LVT logic family, engineered specifically for high-speed, low-noise 3.3 V bus interfacing in space-constrained embedded systems where signal integrity and reduced external component count are critical.

FAQ

What is the function of the DIR pin on the 74LVTH2245D,112?

The DIR (direction) pin controls data flow direction between Port A and Port B. When DIR is LOW, data passes from A to B; when DIR is HIGH, data flows from B to A. This bidirectional control is independent of the OE (output enable) pin, which governs whether outputs are active or in high-impedance state.

Can the 74LVTH2245D,112 safely interface with 5 V logic signals?

Yes-the device features 5.5 V tolerant inputs, meaning all A- and B-side I/O pins accept input voltages up to 5.5 V regardless of VCC level (2.7–3.6 V). This allows direct connection to 5 V TTL outputs without external level-shifting components, provided output loading remains within ±12 mA limits.

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

Each I/O pin contains an active bus hold circuit that detects the last valid logic state and applies weak but sufficient current (75–150 μA for LOW, −75 to −150 μA for HIGH) to maintain it. This prevents floating inputs from drifting to indeterminate levels, removing the need for discrete pull-up or pull-down resistors on unused or intermittently driven lines.

Is the 30 Ω termination resistor internal or external to the die?

The 30 Ω termination is integrated internally in series with each output driver stage, placed between the output transistor and the package pin. It is not a bond-wire or package parasitic-it is a designed-on-die resistor matching typical PCB trace impedances when combined with appropriate external parallel termination (e.g., 50 Ω to VCC or GND).