Texas Instruments SN65LVDS2DBVR

Overview

SN65LVDS2DBVR from Texas Instruments is a single-channel LVDS line receiver IC designed for high-speed point-to-point data transmission in telecom and wireless infrastructure. It accepts differential LVDS inputs (±100 mV threshold), delivers LVTTL-compatible outputs (VOH ≥ 2.4 V at VCC = 3 V), operates from 2.4 V to 3.6 V, supports up to 400 Mbps signaling, and features open-circuit fail-safe operation.

For engineers reviewing the SN65LVDS2DBVR datasheet, SN65LVDS2DBVR pinout, SN65LVDS2DBVR application, or SN65LVDS2DBVR equivalent, this page provides verified electrical specifications, SOT-23-5 package details, functional mode behavior under low-VCC conditions, and validated alternative receivers for industrial signal integrity designs.

Technical Context

The SN65LVDS2DBVR implements a high-impedance differential input stage with internal 300-kΩ pull-up resistors enabling open-circuit fail-safe output high assertion. Its LVTTL output stage drives logic-level signals directly into CMOS/TTL loads without external level-shifting.

It operates across –40°C to +85°C with supply voltage-dependent common-mode input range (0 V to VCC – 0.8 V) and requires no external termination-unlike the SN65LVDT2 variant which integrates a 110-Ω resistor. Propagation delay is 2.5 ns typical with pulse skew ≤ 0.6 ns.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body size) with exposed pad not electrically connected; thermal resistance R_θJA = 322.6°C/W; rated for 385 mW at 85°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVDS receiver applications.

Compared with SN65LVDT2DBVR, SN65LVDS2DBVR avoids integrated termination for design flexibility; versus MAX9122ESA+, it trades bandwidth and temperature range for smaller size, lower cost, and TI's established qualification in communications infrastructure.

Availability

SN65LVDS2DBVR is available at Aetrix Electronics and suitable for wireless infrastructure, telecom line cards, and industrial printer engine control requiring stable component supply across production lifecycles.

Supply support for SN65LVDS2DBVR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

SN65LVDS2DBVR belongs to TI's LVDS interface product line, engineered specifically for high-speed, low-power, noise-immune digital signal transmission in telecom and wireless infrastructure equipment.

FAQ

What is the function of the SN65LVDS2DBVR in an LVDS communication chain?

The SN65LVDS2DBVR functions as a single-channel LVDS line receiver that converts differential LVDS signals (A/B inputs) into single-ended LVTTL-compatible logic outputs (R pin). It does not include internal termination-external 100 Ω differential loading is required. Its fail-safe feature asserts high on R when A/B are open, preventing undefined states in disconnected or powered-down systems. This makes SN65LVDS2DBVR ideal for robust, low-noise data recovery in telecom and industrial interfaces.

Does the SN65LVDS2DBVR support 5-V logic inputs?

No, the SN65LVDS2DBVR does not support 5-V logic inputs. Its A and B pins are differential LVDS inputs with a common-mode range of 0 V to VCC – 0.8 V and a differential threshold of ±100 mV. In contrast, the SN65LVDS1DBVR (driver) has a 5-V tolerant LVTTL input. Applying 5 V to A or B of SN65LVDS2DBVR exceeds its absolute maximum input rating of 4 V and may cause permanent damage. Always ensure differential input signals remain within the specified common-mode and differential voltage limits for SN65LVDS2DBVR.

What happens to the SN65LVDS2DBVR outputs when VCC drops below 1.5 V?

When VCC falls below 1.5 V, the SN65LVDS2DBVR places both its A and B inputs and R output into a high-impedance (Hi-Z) state. This power-on reset behavior prevents bus contention or unintended logic transitions during power-up, power-down, or brownout conditions. The Hi-Z state remains active until VCC rises above 1.5 V and stabilizes, ensuring clean signal integrity across supply transitions. This feature is documented in the "Device Functional Modes" section of the SN65LVDS2DBVR datasheet.

Can the SN65LVDS2DBVR be used in multidrop LVDS configurations?

The SN65LVDS2DBVR is not recommended for multidrop LVDS buses. It lacks integrated termination and relies on a single external 100 Ω differential load placed at the far end of the transmission line. Inserting multiple SN65LVDS2DBVR receivers along one bus creates unterminated stubs and impedance discontinuities, causing reflections and signal integrity degradation. For multidrop topologies, TI recommends the SN65LVDT2DBVR (with internal 110 Ω termination) only at the last node-or dedicated multidrop-capable receivers like the SN65LVDS32. SN65LVDS2DBVR is optimized for point-to-point links.

How does the open-circuit fail-safe mechanism work in the SN65LVDS2DBVR?

The SN65LVDS2DBVR implements open-circuit fail-safe by internally pulling both A and B inputs toward VCC via 300-kΩ resistors. When the differential pair is floating (e.g., cable unplugged or driver disabled), this creates a common-mode voltage near VCC on both inputs, resulting in a differential voltage near zero. An internal AND gate detects this condition and forces the R output high. This behavior is guaranteed only when no external DC path to ground exists at A or B-external termination must be purely AC-coupled or differential to preserve fail-safe operation in SN65LVDS2DBVR.