Texas Instruments SN74LVCR16245ADGGR

Overview

SN74LVCR16245ADGGR 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-V to 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-enabling robust operation in server backplanes and telecom infrastructure interconnects.

For engineers reviewing the SN74LVCR16245ADGGR datasheet, SN74LVCR16245ADGGR pinout, SN74LVCR16245ADGGR application, or SN74LVCR16245ADGGR equivalent, key selection criteria include its Ioff-enabled live insertion capability, 5.5-V input tolerance for level translation, dual independent DIR/OE control per 8-bit section, and TSSOP-48 package compatibility with high-density PCB layouts.

Technical Context

The SN74LVCR16245ADGGR implements two independent 8-bit bidirectional transceiver sections, each controlled by dedicated DIR (direction) and OE (output enable) inputs. Its logic-level translation capability arises from overvoltage-tolerant CMOS inputs that accept 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 edge rates and reduce ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2 V at 3.3 V), while the Ioff circuit ensures zero current backflow during partial power-down-critical for hot-swap and modular system designs.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.50 mm × 6.1 mm body, 0.5-mm pitch, lead-free NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245A and 74ALVC16245, the SN74LVCR16245ADGGR provides unique value in mixed-voltage systems through guaranteed 5.5-V input tolerance, Ioff-enabled live insertion, and built-in 26-Ω termination-reducing BOM count and improving signal integrity without sacrificing speed or temperature range.

Availability

SN74LVCR16245ADGGR is available at Aetrix Electronics and suitable for server backplanes, industrial PLC I/O modules, telecom line cards, and notebook docking stations requiring stable component supply and long-term lifecycle support.

Supply support for SN74LVCR16245ADGGR 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 company specializing in analog and embedded processing technologies, with leadership in interface, power management, and logic solutions.

The SN74LVCR16245ADGGR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-speed, low-noise, mixed-voltage data transfer in demanding computing and communications infrastructure.

FAQ

What voltage levels can the SN74LVCR16245ADGGR inputs tolerate?

The SN74LVCR16245ADGGR inputs accept voltages up to 5.5 V regardless of VCC setting (1.65–3.6 V), enabling reliable interfacing with 5-V logic while operating from a 3.3-V supply. This overvoltage tolerance is specified across the full operating temperature range and does not require external clamping components. The SN74LVCR16245ADGGR leverages this feature to simplify level translation in heterogeneous voltage systems.

Does the SN74LVCR16245ADGGR support hot-swap or live insertion?

Yes, the SN74LVCR16245ADGGR supports live insertion via its Ioff feature, which disables outputs and limits input/output leakage to ±10 µA when VCC = 0 V. This prevents damaging current backflow during board insertion into a powered backplane. The SN74LVCR16245ADGGR is explicitly characterized for partial-power-down operation per JESD78, making it suitable for modular telecom and server applications requiring hot-plug capability.

How does the SN74LVCR16245ADGGR reduce EMI compared to standard transceivers?

The SN74LVCR16245ADGGR integrates 26-Ω series resistors on all I/O pins, slowing output edge rates and suppressing ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2 V). This eliminates the need for discrete series termination resistors and reduces radiated emissions from long PCB traces or cables. The SN74LVCR16245ADGGR achieves this EMI mitigation without degrading propagation delay-maintaining 4.8 ns max tpd at 3.3 V.

What is the function of the dual DIR and OE pins on the SN74LVCR16245ADGGR?

The SN74LVCR16245ADGGR has two independent direction-control (1DIR, 2DIR) and output-enable (1OE, 2OE) inputs-one pair per 8-bit section-allowing asymmetric operation: one section can transmit A→B while the other is isolated or transmitting B→A. This enables flexible data routing in multi-bus architectures. The SN74LVCR16245ADGGR uses these controls to support both 16-bit unified and dual 8-bit split configurations without external logic.

Is bus-hold functionality enabled by default on the SN74LVCR16245ADGGR?

Yes, the SN74LVCR16245ADGGR includes active bus-hold circuitry on all A- and B-port inputs, automatically holding unused or undriven lines at valid logic HIGH or LOW states. This eliminates the need for external pull-up or pull-down resistors and prevents floating inputs from causing excessive ICC or erratic behavior. Bus-hold is always active and requires no configuration-the SN74LVCR16245ADGGR maintains this feature across its full operating voltage and temperature range.