Texas Instruments SN65LVDS2DRG4

Overview

SN65LVDS2DRG4 from Texas Instruments is a single-channel LVDS line receiver IC that converts differential LVDS input signals (A/B) into LVTTL-level output (R), operating from 2.4 V to 3.6 V supply and supporting up to 400 Mbps signaling rates. It features ±100 mV differential input threshold, open-circuit fail-safe operation, and high-impedance inputs/outputs below 1.5 V VCC - used in telecom infrastructure backplane interconnects and wireless baseband timing distribution.

For engineers reviewing the SN65LVDS2DRG4 datasheet, SN65LVDS2DRG4 pinout, SN65LVDS2DRG4 application, or SN65LVDS2DRG4 equivalent, key selection criteria include its 2.5 ns typical propagation delay, 100 mV input threshold compliance with TIA/EIA-644, integrated fail-safe biasing, LVTTL-compatible output drive, and SOIC-8 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The SN65LVDS2DRG4 implements a high-speed differential comparator architecture with internal fail-safe biasing via 300 kΩ pull-up resistors on both A and B inputs, forcing R high when no valid differential signal is present. Its input stage accepts common-mode voltages from 0.05 V to (VCC – 0.8 V), enabling robust operation across supply variations and ground offsets up to 1 V.

Output switching is CMOS-based with VOH ≥ 2.4 V (at VCC ≥ 3.0 V, IOH = –8 mA) and VOL ≤ 0.4 V (IOL = 8 mA), ensuring direct interface with 3.3 V LVTTL logic. Power-on reset disables I/O functionality below 1.5 V VCC, preventing undefined states during power ramp.

Key Specifications

Pinout & Package

SN65LVDS2DRG4 is housed in an SOIC-8 (D) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and standard JEDEC MS-012AC footprint. Thermal resistance RθJA is 172.4°C/W at TA ≤ 25°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65LVDT2D and MAX9107ESA+, SN65LVDS2DRG4 provides optimal balance of fail-safe reliability, SOIC-8 footprint compatibility, and proven interoperability with TI's SN65LVDS1/SN65LVDS2 driver family - making it preferred for new designs targeting telecom and industrial timing integrity.

Availability

SN65LVDS2DRG4 is available at Aetrix Electronics and suitable for wireless infrastructure timing distribution, telecom backplane interconnects, and industrial printer data links requiring stable component supply across extended product lifecycles.

Supply support for SN65LVDS2DRG4 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 U.S.-based semiconductor company specializing in analog, embedded processing, and connectivity solutions, with leadership in high-speed interface ICs since the 1990s.

The SN65LVDS2DRG4 belongs to TI's SN65LVDxx LVDS transceiver family, designed specifically for low-power, low-EMI, high-reliability differential signaling in telecom, industrial, and medical equipment where signal integrity and fail-safe operation are critical.

FAQ

What is the maximum signaling rate supported by the SN65LVDS2DRG4?

The SN65LVDS2DRG4 supports signaling rates up to 400 Mbps, as specified in the official Texas Instruments datasheet SLLS373M. This rating is validated across the full operating temperature range (–40°C to +85°C) and supply voltage range (2.4 V to 3.6 V), with guaranteed timing performance including 2.5 ns typical propagation delay and ≤0.6 ns pulse skew. The 400 Mbps limit reflects tested compliance with TIA/EIA-644 LVDS electrical standards under load conditions.

Does the SN65LVDS2DRG4 have integrated fail-safe functionality?

Yes, the SN65LVDS2DRG4 includes built-in open-circuit fail-safe logic. When the differential input voltage |VA – VB| falls below ±100 mV - such as during cable disconnection or driver disable - internal 300 kΩ pull-up resistors bias both A and B inputs toward VCC, causing the output R to assert a logic high state. This behavior is documented in Section 8.3.2.1 of the SN65LVDS2DRG4 datasheet and requires no external components.

Can the SN65LVDS2DRG4 operate with a 2.5 V supply?

Yes, the SN65LVDS2DRG4 is fully specified to operate from 2.4 V to 3.6 V, including 2.5 V nominal rails. At 2.5 V, its output high voltage (VOH) is guaranteed ≥1.9 V (with IOH = –8 mA), and low voltage (VOL) ≤0.4 V (with IOL = 8 mA), maintaining compatibility with 2.5 V LVTTL logic families. Input common-mode range adjusts to 0.05 V to 1.7 V, supporting typical ground-shift scenarios.

What is the purpose of the NC pins on the SN65LVDS2DRG4 SOIC-8 package?

The NC pins (Pins 3, 4, and 6) on the SN65LVDS2DRG4 are not electrically connected to the silicon die. Per TI's datasheet guidance, they should be grounded on the PCB for improved thermal dissipation and reduced EMI susceptibility. Leaving them floating may degrade thermal performance and increase radiated emissions, especially in high-density layouts common in telecom and industrial applications.

How does the SN65LVDS2DRG4 handle power supply brownout conditions?

When VCC drops below 1.5 V, the SN65LVDS2DRG4 activates internal power-on reset circuitry that places both inputs (A/B) and output (R) into a high-impedance state. This prevents undefined logic levels, back-driving of upstream drivers, or bus contention during power ramp-up/down. The feature is active across all temperatures and is verified per Section 8.4.1 of the SN65LVDS2DRG4 datasheet.