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Texas Instruments SN65LVDS250DBTR
- Part No.:
- SN65LVDS250DBTR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN65LVDS250DBTR.pdf
- Description:
- IC CROSSPOINT SW 1 X 4:4 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,513
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Product details
Overview
SN65LVDS250DBTR from Texas Instruments is a 4×4 nonblocking LVDS crosspoint switch IC used for high-speed signal routing in telecom/datacom infrastructure. It supports >2.0 Gbps data rates, features 800 ps typical propagation delay, 25 mV input hysteresis, and operates from a single 3.3-V supply. It enables flexible clock muxing and data path switching in wireless base station backplanes.
For engineers reviewing the SN65LVDS250DBTR datasheet, SN65LVDS250DBTR pinout, SN65LVDS250DBTR application, or SN65LVDS250DBTR equivalent, key selection criteria include differential jitter performance (60 ps typical at 2.0 Gbps), flow-through TSSOP-38 layout compatibility, LVPECL/CML/LVDS input compatibility, and absence of integrated termination resistors (distinguishing it from SN65LVDT250).
Technical Context
The SN65LVDS250DBTR implements a fully differential 4×4 crosspoint architecture with four independent 4:1 multiplexers-one per output channel-enabling any input (1A/1B through 4A/4B) to be routed to any output (1Y/1Z through 4Y/4Z) without blocking. Control is performed via dual-bit select lines (S10/S11, etc.) per channel.
It uses LVDS signaling throughout internal paths to minimize skew and EMI, achieves <50 ps pulse skew and 175 ps channel-to-channel output skew, and accepts common-mode input voltages from 0 V to 3.3 V with 100 mV differential threshold and 25 mV hysteresis for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | >2.0 Gbps - supports 2.5 Gbps operation with verified eye integrity and deterministic jitter ≤65 ps peak-to-peak |
| Propagation delay | 700–1200 ps - tight 800 ps typical ensures timing-critical clock/data alignment in multi-GHz routing |
| Differential jitter | 60 ps typical peak-to-peak at 2.0 Gbps - meets stringent phase-noise requirements for serial link retiming |
| Supply current | 110 mA typical at 3.3 V - enables low-power high-speed switching without thermal derating in dense PCB layouts |
| Input compatibility | LVPECL, CML, and LVDS - eliminates level-shifting circuitry when interfacing with diverse SerDes sources |
| Operating temperature | −40°C to +85°C - qualified for industrial and telecom equipment deployed in uncontrolled environments |
| Input hysteresis | 25 mV - improves noise margin against crosstalk and ground bounce in high-density backplane traces |
Pinout & Package
SN65LVDS250DBTR is housed in a 38-pin TSSOP (DBT) package with 0.5 mm pitch, 9.7 mm × 4.4 mm body size, and 1.2 mm max height. The flow-through pinout minimizes trace stubs and simplifies high-speed PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B – 4A, 4B | Differential input pairs | Four LVDS-compatible input channels; each pair accepts AC- or DC-coupled differential signals |
| 1Y, 1Z – 4Y, 4Z | Differential output pairs | Four LVDS outputs with 247–454 mV differential swing; require external 100-Ω termination |
| S10, S11 – S40, S41 | Mux select control inputs | Two-bit binary select per output channel (e.g., S10/S11 chooses source for 1Y/1Z) |
| 1DE – 4DE | Output enable/disable | Active-high enables corresponding Y/Z driver; disables output to high-impedance state |
| VCC, GND | Power and ground | Single 3.3-V supply; multiple VCC/GND pins reduce power delivery impedance and improve PSRR |
Key Features
| Feature | Design Value |
|---|---|
| Nonblocking 4×4 crosspoint | Enables simultaneous independent routing of four differential data streams without contention or arbitration latency |
| Flow-through pinout | Minimizes signal path length and layer transitions-critical for preserving signal integrity above 2 Gbps |
| LVDS-compliant I/O | Fully compliant with ANSI TIA/EIA-644-A; supports interoperability with industry-standard LVDS transceivers |
| Low skew architecture | ≤175 ps channel-to-channel output skew ensures deterministic timing across all four outputs |
| Wide common-mode range | 0 V to 3.3 V input common-mode tolerance accommodates mismatched driver/receiver voltage rails |
| No integrated termination | Eliminates fixed 110-Ω resistors-allows system-level optimization of termination location and value |
Applications
| Wireless Base Station Backhaul | Clock Distribution in Routers |
|---|---|
Use Scenario: Routing multiple CPRI or OBSAI links between RF units and baseband processors in LTE/5G macro cells. IC Role / Device Role / Timing Role: Crosspoint switch dynamically reconfigures high-speed serial data paths during maintenance or load balancing. Use Value: Enables field-upgradable topology changes without hardware modification; maintains <60 ps jitter for jitter-sensitive SerDes PHYs. |
Use Scenario: Selecting among redundant clock sources (e.g., GPS, atomic, and local oscillators) for packet-switched network timing. IC Role / Device Role / Timing Role: LVDS clock mux delivering low-skew, low-jitter clock signals to multiple line cards or ASICs. Use Value: Achieves sub-100 ps inter-output skew and deterministic jitter ≤65 ps-meeting ITU-T G.8262 ePRTC holdover requirements. |
| High-Speed Test Equipment | Data Center Optical Interconnect |
Use Scenario: Signal path switching in bit-error-rate testers (BERTs) and protocol analyzers supporting multi-lane PCIe, SATA, or USB. IC Role / Device Role / Timing Role: Reconfigurable differential signal router enabling automated test sequencing across DUT interfaces. Use Value: Supports PRBS23 pattern at 2.0 Gbps with verified eye opening; flow-through layout avoids stub-induced reflections. |
Use Scenario: Multiplexing parallel electrical lanes from host ASICs to optical module drivers in 100G/400G QSFP-DD modules. IC Role / Device Role / Timing Role: High-bandwidth signal selector managing lane failover and calibration paths in pluggable optics. Use Value: Delivers <50 ps pulse skew and 247–454 mV differential output swing compatible with TI's THS6212 driver inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS crosspoint switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDT250DBTR | Includes integrated 110-Ω differential termination resistors on all inputs and outputs; otherwise identical pinout, timing, and logic | Reduces board space and external component count where termination must be placed at the switch, but limits flexibility in termination placement | Select SN65LVDT250DBTR only when board area constraints outweigh need for optimized termination location |
| MAX9154ESE+ | 4×4 LVDS crosspoint with 3.3-V operation, but higher 1.3 ns max propagation delay and no LVPECL/CML input compatibility | Targeted at cost-sensitive industrial systems with relaxed timing budgets; lacks telecom-grade jitter specs | Choose MAX9154ESE+ only for non-timing-critical applications where jitter >100 ps and skew >300 ps are acceptable |
Compared with SN65LVDT250DBTR, SN65LVDS250DBTR offers greater layout flexibility by omitting integrated termination, while MAX9154ESE+ trades off jitter performance and input compatibility for lower cost in less demanding systems.
Availability
SN65LVDS250DBTR is available at Aetrix Electronics and suitable for wireless base stations, telecom routers, and high-speed test equipment requiring stable component supply across extended product lifecycles.
Supply support for SN65LVDS250DBTR 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 solutions, with decades of expertise in high-speed interface ICs.
The SN65LVDS250DBTR belongs to TI's LVDS interface portfolio, designed specifically for low-jitter, high-bandwidth signal routing in telecom, datacom, and instrumentation systems operating up to 2.5 Gbps.
FAQ
What is the maximum data rate supported by the SN65LVDS250DBTR?
The SN65LVDS250DBTR is characterized for operation beyond 2.0 Gbps, with validated performance at 2.5 Gbps using PRBS23 patterns. Eye diagrams confirm clean opening at 2.5 Gbps, and peak-to-peak jitter remains within 110 ps under those conditions. The device's 245 ps typical rise/fall time and <175 ps channel skew support reliable operation at this rate.
Does the SN65LVDS250DBTR include integrated termination resistors?
No, the SN65LVDS250DBTR does not include integrated termination resistors. Unlike the pin-compatible SN65LVDT250DBTR, which integrates 110-Ω resistors on all I/Os, the SN65LVDS250DBTR requires external 100-Ω differential termination at each output. This design allows system-level optimization of termination placement and value.
Can the SN65LVDS250DBTR accept LVPECL or CML inputs directly?
Yes, the SN65LVDS250DBTR inputs are electrically compatible with LVPECL and CML signal levels in addition to LVDS. Its wide common-mode input range (0 V to 3.3 V) and differential threshold (±100 mV) allow direct connection to these standards without level-shifting circuitry, provided proper biasing and termination are applied.
What is the operating temperature range for the SN65LVDS250DBTR?
The SN65LVDS250DBTR is specified for operation from −40°C to +85°C ambient temperature. This industrial-grade range is validated across all electrical parameters including propagation delay, jitter, and supply current, making it suitable for deployment in outdoor telecom enclosures and uncooled networking hardware.
How is output enable controlled on the SN65LVDS250DBTR?
Each output pair (1Y/1Z through 4Y/4Z) has a dedicated active-high enable input (1DE through 4DE). Driving a DE pin low places the corresponding Y/Z driver into high-impedance state with ±1 µA leakage. This allows individual channel shutdown for power management or bus sharing without affecting other active outputs.
SN65LVDS250DBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDS
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Crosspoint Switch
- Circuit:
- 1 x 4:4
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
SN65LVDS250DBTR FAQ
1.How can I place an order for SN65LVDS250DBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDS250DBTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN65LVDS250DBTR reliable?
The price and inventory of SN65LVDS250DBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDS250DBTR is usually 5 days.
3.What payment methods are accepted for SN65LVDS250DBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVDS250DBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVDS250DBTR?
SN65LVDS250DBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDS250DBTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN65LVDS250DBTR?
For technical support, including SN65LVDS250DBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDS250DBTR requirements.
6.How does Aetrix verify that SN65LVDS250DBTR is sourced from the original manufacturer or authorized distributors?
All SN65LVDS250DBTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN65LVDS250DBTR meets industry standards.
7.What is the process for return or replacement of SN65LVDS250DBTR?
All SN65LVDS250DBTR units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDS250DBTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN65LVDS250DBTR part is unused and in its original packaging.
Return procedure for SN65LVDS250DBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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