Texas Instruments SN65LVDT250DBTR

Overview

SN65LVDT250DBTR from Texas Instruments is a 4×4 nonblocking LVDS crosspoint switch with integrated 110-Ω termination resistors, designed for high-speed signal routing in telecom/datacom systems. It supports >2.0 Gbps data rates, delivers 800 ps typical propagation delay, and operates from a single 3.3-V supply with 110 mA typical supply current.

For engineers reviewing the SN65LVDT250DBTR datasheet, SN65LVDT250DBTR pinout, SN65LVDT250DBTR application, or SN65LVDT250DBTR equivalent, key selection criteria include differential input hysteresis (25 mV), channel-to-channel output skew (175 ps), peak-to-peak jitter (60–110 ps), and compatibility with LVPECL/CML/LVDS signal levels.

Technical Context

The SN65LVDT250DBTR implements a fully differential, flow-through pinout architecture enabling any of four differential inputs to be routed to any of four differential outputs without blocking. Its internal signal paths preserve signal integrity at multi-Gbps speeds while minimizing skew.

Unlike the SN65LVDS250DBTR, the SN65LVDT250DBTR integrates 110-Ω line termination resistors on all outputs-reducing board space and external component count-while maintaining full electrical compatibility with ANSI TIA/EIA-644-A LVDS standard and supporting common-mode input ranges from 0 V to 3.3 V.

Key Specifications

Pinout & Package

SN65LVDT250DBTR uses a 38-pin TSSOP (DBT) package with 0.5-mm pitch and 1.2-mm maximum height, optimized for compact, high-density PCB layouts. Pin numbering follows standard TSSOP orientation with Pin 1 in top-left corner (Q1 quadrant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65LVDS250DBTR and MAX9154ESE+, the SN65LVDT250DBTR uniquely combines integrated 110-Ω termination, 38-pin TSSOP footprint, and <110 ps peak-to-peak jitter-making it optimal for space-constrained, high-integrity telecom/datacom routing where board real estate and signal fidelity are critical.

Availability

SN65LVDT250DBTR is available at Aetrix Electronics and suitable for wireless base station backhaul, high-speed network routing, and telecom line card applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN65LVDT250DBTR 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 high-performance signal chain solutions with over 90 years of innovation in industrial, automotive, and communications markets.

The SN65LVDT250DBTR belongs to TI's LVDS interface product line, engineered specifically for high-speed, low-jitter signal routing in telecom infrastructure, data center interconnects, and wireless infrastructure equipment.

FAQ

What is the primary function of the SN65LVDT250DBTR in a signal routing system?

The SN65LVDT250DBTR functions as a 4×4 nonblocking LVDS crosspoint switch that routes any of four differential inputs to any of four differential outputs. Its integrated 110-Ω termination resistors eliminate external components, and its flow-through pinout minimizes PCB trace length. The SN65LVDT250DBTR supports >2.0 Gbps data rates with 800 ps typical propagation delay and 175 ps channel skew-making it ideal for high-integrity telecom and datacom routing where signal fidelity and layout simplicity are essential.

Does the SN65LVDT250DBTR require external termination resistors?

No, the SN65LVDT250DBTR includes integrated 110-Ω termination resistors on all four differential outputs, eliminating the need for eight external resistors. This integration reduces PCB area, component count, and potential layout-induced impedance mismatches. The SN65LVDT250DBTR maintains full ANSI TIA/EIA-644-A LVDS compliance and delivers 247–454 mV differential output voltage magnitude with 1.125–1.375 V steady-state common-mode voltage-ensuring interoperability with standard LVDS receivers.

How does the SN65LVDT250DBTR handle different input signal standards like LVPECL and CML?

The SN65LVDT250DBTR accepts LVPECL, CML, and LVDS input signal levels directly without external level-shifting circuitry. Its inputs operate over a wide common-mode range (0 V to 3.3 V) and tolerate differential input voltages from ±0.1 V to ±0.8 V. The SN65LVDT250DBTR achieves this through internally biased differential receivers with 25 mV hysteresis, ensuring reliable switching even under marginal signal conditions-critical in mixed-signal telecom systems where multiple interface standards coexist.

What is the operating temperature range and supply voltage specification for the SN65LVDT250DBTR?

The SN65LVDT250DBTR is characterized for operation from –40°C to +85°C ambient temperature and operates from a single 3.3-V supply with a recommended range of 3.0 V to 3.6 V. At 3.3 V and 25°C, it draws 110 mA typical supply current. The SN65LVDT250DBTR maintains specified timing and jitter performance across this full temperature and voltage range, with propagation delay varying from 700 ps to 1200 ps and peak-to-peak jitter remaining ≤110 ps at 2.0 Gbps.

Can the SN65LVDT250DBTR be used in place of the SN65LVDS250DBTR?

The SN65LVDT250DBTR is pin-compatible and functionally identical to the SN65LVDS250DBTR except for integrated termination: the SN65LVDT250DBTR includes 110-Ω resistors on all outputs, while the SN65LVDS250DBTR requires external termination. No PCB changes are needed for substitution if the design accommodates the slightly higher power dissipation (522 mW max at 85°C). The SN65LVDT250DBTR retains identical logic tables, timing, and electrical specs-making it a drop-in upgrade where board space savings and reduced BOM count are priorities.