Texas Instruments SN74LVCR16245ADLR

Overview

SN74LVCR16245ADLR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65–3.6-V buses. It supports mixed-mode signaling (5.5-V-tolerant inputs at 3.3-V VCC), delivers 4.8-ns max propagation delay at 3.3 V, and integrates 26-Ω series output resistors to suppress switching noise-used in server backplanes and telecom line cards.

For engineers reviewing the SN74LVCR16245ADLR datasheet, SN74LVCR16245ADLR pinout, SN74LVCR16245ADLR application, or SN74LVCR16245ADLR equivalent, key selection criteria include Ioff-enabled live insertion support, 5.5-V input tolerance for 3.3-V/5-V level translation, dual independent DIR/OE control per 8-bit section, and SSOP-48 package compatibility with high-density PCB layouts.

Technical Context

The SN74LVCR16245ADLR implements two independent 8-bit bidirectional transceiver sections, each controlled by dedicated DIR (direction) and OE (output enable) inputs. Its logic-level translation capability stems from overvoltage-tolerant input circuitry that accepts up to 5.5 V regardless of VCC (1.65–3.6 V), enabling seamless interfacing between 3.3-V system logic and legacy 5-V peripherals.

Each I/O port features integrated 26-Ω series termination to damp signal edges and reduce EMI from long traces or cables. The device includes active bus-hold circuitry on all data inputs to maintain valid logic states when undriven, and Ioff protection prevents current backflow during partial power-down-critical for hot-swap applications in network switches and blade servers.

Key Specifications

Pinout & Package

SN74LVCR16245ADLR is packaged in a 48-pin SSOP (DL) with 15.88 mm × 7.49 mm body size, 0.635-mm lead pitch, and gull-wing leads compatible with standard reflow profiles (MSL Level-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADLR and SN74AVC16245DGGR, the SN74LVCR16245ADLR uniquely combines 5.5-V input tolerance, Ioff, and integrated 26-Ω termination-making it the only option for robust, low-BOM-count 3.3-V-to-5-V bidirectional bridging in hot-swap-capable infrastructure equipment.

Availability

SN74LVCR16245ADLR is available at Aetrix Electronics and suitable for server backplanes, telecom line cards, and industrial PLC I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVCR16245ADLR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions, with decades of experience in high-reliability logic and interface products.

The SN74LVCR16245ADLR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-immune, mixed-voltage data transfer in mission-critical communications and computing infrastructure.

FAQ

What is the maximum input voltage rating for SN74LVCR16245ADLR?

The SN74LVCR16245ADLR supports input voltages up to 5.5 V across its entire operating VCC range (1.65–3.6 V). This overvoltage tolerance allows direct interfacing with 5-V logic families without external level-shifting components, making the SN74LVCR16245ADLR ideal for mixed-voltage system integration where 3.3-V controllers communicate with legacy 5-V peripherals.

Does SN74LVCR16245ADLR support hot-swap or live-insertion applications?

Yes, SN74LVCR16245ADLR includes Ioff circuitry that disables outputs and limits leakage to ±10 µA when VCC = 0 V, preventing damaging current backflow during insertion into powered systems. This feature makes SN74LVCR16245ADLR suitable for hot-pluggable modules in telecom line cards and modular server architectures where strict power sequencing cannot be guaranteed.

What package type is used for SN74LVCR16245ADLR?

SN74LVCR16245ADLR uses a 48-pin SSOP (Shrink Small-Outline Package) with part number suffix DL, measuring 15.88 mm × 7.49 mm and featuring 0.635-mm lead pitch. This package provides mechanical robustness and thermal performance suitable for industrial and telecom applications, with MSL Level-1 rating for unlimited floor life under standard handling conditions.

How does the 26-Ω series resistor on each I/O pin benefit system design?

The integrated 26-Ω series resistors on all 16 I/O pins of SN74LVCR16245ADLR damp signal edges and suppress reflections caused by long PCB traces or cables-eliminating the need for discrete termination resistors. This reduces BOM count, saves PCB area, and improves signal integrity in high-speed parallel buses such as those found in server memory subsystems and industrial data acquisition systems using the SN74LVCR16245ADLR.

Can SN74LVCR16245ADLR operate at 1.65 V and still meet timing specifications?

Yes, SN74LVCR16245ADLR is fully characterized down to 1.65 V VCC, with max propagation delay specified at 7.8 ns (VCC = 1.8 V) and 4.8 ns (VCC = 3.3 V). At 1.65 V, timing parameters remain within guaranteed limits per the datasheet's Recommended Operating Conditions table, enabling reliable operation in ultra-low-power embedded systems where the SN74LVCR16245ADLR serves as a voltage-scalable bus bridge.