Texas Instruments SN65LVDS2DBVTG4

Overview

SN65LVDS2DBVTG4 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 systems. It accepts differential LVDS inputs (±100 mV threshold), delivers LVTTL-compatible outputs (VOH ≥ 2.4 V at VCC = 3.3 V), operates from 2.4 V to 3.6 V, and achieves 400 Mbps signaling with 2.5 ns typical propagation delay.

For engineers reviewing the SN65LVDS2DBVTG4 datasheet, SN65LVDS2DBVTG4 pinout, SN65LVDS2DBVTG4 application, or SN65LVDS2DBVTG4 equivalent, key selection criteria include its fail-safe open-circuit operation, integrated 110 Ω termination (in LVDT variants only - not applicable here), 9 kV bus-terminal ESD rating, and compatibility with 100 Ω transmission lines in industrial temperature range (–40°C to 85°C).

Technical Context

The SN65LVDS2DBVTG4 functions as a unidirectional LVDS-to-LVTTL level translator: its differential A/B inputs interface with LVDS drivers (e.g., SN65LVDS1), while its R output drives standard TTL logic. It implements an internal fail-safe circuit that pulls A/B to VCC via 300 kΩ resistors and forces R high when |VID| < 100 mV and no valid signal is present.

Unlike the SN65LVDT2, the SN65LVDS2DBVTG4 does not integrate input termination - external 100 Ω termination is required across A and B. Its power-on reset disables I/O when VCC < 1.5 V, and its input common-mode range spans 0 V to VCC – 0.8 V (e.g., 0–2.5 V at 3.3 V supply), supporting ground-shifted interconnects.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body size), surface-mount, lead-free, RoHS-compliant. Pin 1 marked by dot; pin numbering follows standard SOT-23 top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65LVDT2DBVT and MAX3095ESA+, the SN65LVDS2DBVTG4 provides optimal balance of speed (400 Mbps), compact SOT-23-5 footprint, fail-safe reliability, and industrial temperature support - making it the preferred choice for modern high-density wireless and telecom data links requiring external termination control.

Availability

SN65LVDS2DBVTG4 is available at Aetrix Electronics and suitable for wireless infrastructure, telecom line card, and industrial printer applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN65LVDS2DBVTG4 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 technologies, with decades of expertise in high-speed interface solutions.

The SN65LVDS2DBVTG4 belongs to TI's LVDS family, engineered specifically for robust, low-power, high-speed differential data transmission in telecom, wireless, and industrial systems operating across extended temperature ranges.

FAQ

What is the function of the SN65LVDS2DBVTG4 in a signal chain?

The SN65LVDS2DBVTG4 functions as a unidirectional LVDS-to-LVTTL receiver: it converts differential LVDS input signals (applied to pins A and B) into single-ended LVTTL-compatible output logic (at pin R). It does not include internal termination - external 100 Ω resistance must be placed across A and B. The SN65LVDS2DBVTG4 is used in high-speed serial links where noise immunity and low EMI are critical, such as between FPGAs and RF ICs in wireless base stations.

Does the SN65LVDS2DBVTG4 have integrated input termination?

No, the SN65LVDS2DBVTG4 does not include integrated input termination. It requires an external 100 Ω resistor placed differentially across pins A and B to match the characteristic impedance of the transmission line. In contrast, the SN65LVDT2 variant (e.g., SN65LVDT2DBVT) integrates a 110 Ω termination resistor - a key functional distinction confirmed in TI's device options table and functional description.

What happens to the SN65LVDS2DBVTG4 outputs when supply voltage drops below 1.5 V?

When VCC falls below 1.5 V, the SN65LVDS2DBVTG4 activates its power-on reset circuitry, placing all I/O terminals - A, B, and R - into a high-impedance (Hi-Z) state. This prevents bus contention during power-up/down sequences and ensures predictable behavior in systems with asymmetric rail ramp rates. This behavior is explicitly specified in the "Features" and "Device Functional Modes" sections of the official datasheet.

Is the SN65LVDS2DBVTG4 compatible with 5 V logic inputs?

No, the SN65LVDS2DBVTG4 accepts only differential LVDS inputs on pins A and B - it is not 5 V tolerant. Its input common-mode range is limited to 0 V to VCC – 0.8 V (e.g., 0–2.5 V at 3.3 V supply). The 5 V tolerance feature applies exclusively to the SN65LVDS1 driver's D input pin, not to the SN65LVDS2DBVTG4 receiver. Applying 5 V to A or B exceeds absolute maximum ratings and may damage the device.

How does the fail-safe feature of the SN65LVDS2DBVTG4 operate?

The SN65LVDS2DBVTG4 implements fail-safe operation by pulling both A and B inputs toward VCC via internal 300 kΩ resistors when no valid differential signal is present. If |VID| < 100 mV and the inputs float (e.g., due to cable disconnection), this biasing creates sufficient common-mode voltage to trigger an internal AND gate, forcing the R output high. This behavior is documented in Section 8.3.2.1 and Figure 8-2 of the datasheet and ensures defined logic states during fault conditions.