Nexperia USA Inc. 74LVT2245DB,118

Overview

74LVT2245DB,118 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 achieves 3.2 ns typical propagation delay at 3.3 V - deployed in high-speed 3.3 V backplane and memory interface buses.

For engineers reviewing the 74LVT2245DB,118 datasheet, 74LVT2245DB,118 pinout, 74LVT2245DB,118 application, or 74LVT2245DB,118 equivalent, key selection criteria include its on-die 30 Ω termination (reducing external component count), bidirectional DIR/OE control logic, bus hold functionality eliminating pull-ups, and compatibility with TTL-level signaling in mixed-voltage systems.

Technical Context

This transceiver implements a dual-bus architecture with independent A- and B-side I/Os controlled by DIR (direction) and OE (output enable). When OE is HIGH, all outputs enter high-impedance state regardless of DIR; when OE is LOW, data flows A→B (DIR = HIGH) or B→A (DIR = LOW).

Each I/O features bus hold circuitry (IBHL/IBHH ≥75 μA) to maintain last-valid logic state on floating inputs, and IOFF protection ensures near-zero leakage during power-down. The BiCMOS process enables TTL-compatible input thresholds (VIH ≥2.0 V, VIL ≤0.8 V) while sustaining 5.5 V input overvoltage tolerance.

Key Specifications

Pinout & Package

74LVT2245DB,118 is supplied in SOT360-1 (TSSOP20) package: 20-pin, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APWR and 74ALVC16245DGG, the 74LVT2245DB,118 uniquely integrates 30 Ω termination and bus hold - reducing component count and improving reliability in space-constrained, floating-input-prone 8-bit bus designs without sacrificing 3.3 V speed or 5 V tolerance.

Availability

74LVT2245DB,118 is available at Aetrix Electronics and suitable for memory interface buses, backplane data links, hot-swappable I/O cards, and mixed-voltage peripheral bridges requiring stable component supply and long-term industrial availability.

Supply support for 74LVT2245DB,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 industrial and consumer electronics.

The 74LVT/LVTH series targets high-speed 3.3 V digital interconnects, emphasizing low skew, robust noise immunity, and seamless integration into mixed-voltage systems with minimal external components.

FAQ

What is the function of the DIR and OE pins on the 74LVT2245DB,118?

DIR (pin 1) controls data direction: HIGH enables A→B transfer, LOW enables B→A. OE (pin 19) is active-LOW output enable - HIGH forces all A/B outputs into high-impedance state, overriding DIR. Both inputs are TTL-compatible and sampled asynchronously; their combined states define the functional mode per the datasheet truth table.

Does the 74LVT2245DB,118 require external pull-up resistors on unused inputs?

No. The device includes integrated bus hold circuitry on all A and B I/O pins, providing ±75 μA minimum holding current to retain the last valid logic state. This eliminates the need for external pull-up or pull-down resistors on unconnected inputs, reducing BOM cost and PCB footprint while improving noise immunity.

Can the 74LVT2245DB,118 interface safely with 5 V logic signals?

Yes. All inputs tolerate up to 5.5 V regardless of VCC level, allowing direct connection to 5 V outputs without level shifters. However, outputs swing only to VCC (max 3.6 V), so driving 5 V inputs requires external pull-ups or compatible receiver thresholds - the device itself does not translate output voltage levels upward.

What is the purpose of the 30 Ω termination resistors inside the 74LVT2245DB,118?

The 30 Ω series termination resistors are placed at each output driver to match typical PCB trace impedances (e.g., 50 Ω) in source-series configuration. This minimizes signal reflections and overshoot on short to medium-length traces, improving signal integrity without requiring eight discrete resistors - critical for clean timing in high-speed 3.3 V bus applications.