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Texas Instruments SN65LVDS250DBT
- Part No.:
- SN65LVDS250DBT
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN65LVDS250DBT.pdf
- Description:
- IC CROSSPOINT SW 1 X 4:4 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,134
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Product details
Overview
SN65LVDS250DBT from Texas Instruments is a 4×4 nonblocking LVDS crosspoint switch with flow-through pinout, designed for high-speed signal routing in telecom and datacom systems. It supports >2.0 Gbps operation, features 800 ps typical propagation delay, 25 mV input hysteresis, and operates from a single 3.3-V supply. Used in clock muxing and wireless base station backplanes.
For engineers reviewing the SN65LVDS250DBT datasheet, SN65LVDS250DBT pinout, SN65LVDS250DBT application, or SN65LVDS250DBT equivalent, this page delivers verified electrical specs, thermal ratings, timing behavior at 2.0–2.5 Gbps, and real-world routing configurations - all tied explicitly to the DBT-packaged SN65LVDS250 variant.
Technical Context
The SN65LVDS250DBT implements a fully differential 4×4 crosspoint architecture with four independent 4:1 multiplexers - one per output channel (1Y/1Z through 4Y/4Z). Each output driver accepts any of the four differential inputs (1A/1B to 4A/4B) via S10–S41 select controls, enabling arbitrary input-to-output path assignment without blocking.
It uses LVDS-compatible signaling with 247–454 mV differential output voltage (|VOD|), 1.125–1.375 V steady-state common-mode output (VOC(SS)), and integrated 110-Ω termination resistors only on the SN65LVDT250 variant - not on SN65LVDS250DBT. Input compatibility extends to LVPECL and CML levels via internal biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–3.6 V - ensures stable operation across industrial temperature range with minimal supply regulation overhead. |
| Data Rate | Up to 2.5 Gbps - validated with PRBS2^23−1 pattern; enables use in OC-48/STM-16 and 10G Ethernet PHY interconnects. |
| Propagation Delay | 700–1200 ps - tightly bounded skew (≤50 ps pulse skew, ≤175 ps channel-to-channel skew) preserves signal integrity in parallel bus routing. |
| Differential Output Voltage | 247–454 mV - meets ANSI TIA/EIA-644-A LVDS standard for noise margin and receiver compatibility. |
| Input Hysteresis | 25 mV - suppresses metastability and improves noise immunity on control inputs (S10–S41, 1DE–4DE) and data paths. |
| Power Dissipation | 356 mW at 1 GHz, TA = 25°C - enables thermal management in dense TSSOP-38 layouts without forced airflow. |
| Junction Temperature Limit | 140°C - defines maximum allowable die temperature under worst-case power and ambient conditions. |
Pinout & Package
SN65LVDS250DBT is housed in a 38-pin Thin Shrink Small Outline Package (TSSOP-DBT), 9.7 mm × 4.4 mm × 1.2 mm max height, with 0.5-mm lead pitch and exposed thermal pad (non-electrical). Pin 1 located at top-left corner with index area marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B – 4A, 4B | Differential input pairs | Four LVDS/LVPECL/CML-compatible input channels; each pair accepts full-swing differential signals with common-mode range 0–3.3 V. |
| 1Y, 1Z – 4Y, 4Z | Differential output pairs | Four LVDS outputs with 247–454 mV |VOD| and 1.125–1.375 V VOC(SS); support point-to-point or multi-drop routing. |
| S10, S11 – S40, S41 | Channel select inputs | Two-bit binary controls per output (e.g., S10/S11 selects source for 1Y/1Z); enable nonblocking 4:1 mux per output. |
| 1DE – 4DE | Output enable/disable | Individual 3-state control per output pair; high-Z state reduces crosstalk and allows shared bus architectures. |
| VCC, GND | Power and ground | Single 3.3-V supply; 10 dedicated VCC/GND pins distributed across package for low-impedance decoupling and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Nonblocking 4×4 crosspoint | Any input can be routed to any output simultaneously - eliminates contention and enables dynamic reconfiguration in FPGA-to-ASIC interconnects. |
| Flow-through pinout | Input and output pins aligned on opposite sides of package - minimizes trace length, layer count, and skew in PCB layout. |
| LVDS compliance | Fully conforms to ANSI TIA/EIA-644-A - guarantees interoperability with industry-standard LVDS transceivers and receivers. |
| Low jitter performance | 60 ps typical pk-pk jitter at 2.0 Gbps - maintains eye opening >75% at 2.5 Gbps for reliable serial link timing budgets. |
| Wide input compatibility | Accepts LVDS, LVPECL, and CML signals without external level-shifting - simplifies mixed-technology system integration. |
Applications
| Wireless Base Station Backplane | Clock Distribution Muxing |
|---|---|
|
Use Scenario: Routing multiple RFIC clock and data streams between DSPs, FPGAs, and transceivers in macrocell BTS. IC Role / Device Role / Timing Role: 4×4 signal router enabling dynamic path selection for JESD204B lanes and sync clocks without hardware rework. Use Value: Eliminates fixed wiring; supports field-upgradable radio configurations and multi-band carrier aggregation. |
Use Scenario: Consolidating four independent clock sources (e.g., GPSDO, TCXO, PLL, backup oscillator) into one fanout buffer chain. IC Role / Device Role / Timing Role: Low-skew clock switch with sub-1 ns propagation delay and <50 ps pulse skew - preserves phase alignment across domains. Use Value: Enables seamless clock failover and source switching without glitches or metastability in timing-critical control planes. |
| High-Speed Network Router Line Card | Telecom Datacom Interconnect |
|
Use Scenario: Interconnecting SERDES lanes between packet processors, switch fabrics, and PHY modules in 10G/25G line cards. IC Role / Device Role / Timing Role: High-fidelity signal switch supporting 2.5 Gbps PRBS2^23−1 patterns with <110 ps peak-to-peak jitter. Use Value: Maintains BER <1e−12 over 20-inch FR4 traces; avoids retiming or equalization in mid-board signal paths. |
Use Scenario: Aggregating and rerouting differential control/data buses between legacy SONET framer ICs and modern packet processors. IC Role / Device Role / Timing Role: Protocol-agnostic LVDS crosspoint - transparently bridges TDM, HDLC, and GFP interfaces using same physical layer. Use Value: Extends life of installed telecom infrastructure while enabling migration to packet-based transport layers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS crosspoint switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDT250DBT | Includes integrated 110-Ω termination resistors on all I/O; otherwise identical pinout, timing, and logic. | Reduces external component count in space-constrained designs but increases power by ~15 mA per active channel. | Select SN65LVDT250DBT when board area is premium and termination matching is critical; SN65LVDS250DBT when discrete termination is preferred for tuning. |
| MAX9154ESE+ | 4×4 LVDS crosspoint with 3.3 V supply, but higher 1.3 ns max propagation delay and no LVPECL/CML input support. | Limited to pure LVDS systems; lacks input-level flexibility required in mixed-signal telecom backplanes. | Choose MAX9154ESE+ only for cost-sensitive LVDS-only applications where 500 ps additional delay is acceptable. |
Compared with SN65LVDT250DBT, the SN65LVDS250DBT offers identical routing functionality without on-die termination - enabling precise impedance control via external 100-Ω differential loads. Against MAX9154ESE+, SN65LVDS250DBT delivers lower jitter, broader input compatibility, and tighter skew control essential for multi-gigabit synchronization.
Availability
SN65LVDS250DBT is available at Aetrix Electronics and suitable for wireless base stations, telecom line cards, and high-speed network routers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN65LVDS250DBT 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-speed interface solutions, with decades of heritage in precision timing and signal integrity products.
The SN65LVDS250DBT belongs to TI's LVDS interface portfolio, engineered specifically for high-reliability, high-bandwidth signal routing in telecom infrastructure, wireless communications, and enterprise networking equipment.
FAQ
What is the maximum data rate supported by the SN65LVDS250DBT?
The SN65LVDS250DBT is characterized for operation up to 2.5 Gbps, with typical peak-to-peak jitter of 60 ps at 2.0 Gbps and 110 ps at 2.5 Gbps using PRBS2^23−1 test patterns. Performance is guaranteed across the full −40°C to +85°C operating range with 3.3-V supply.
Does the SN65LVDS250DBT include on-chip termination resistors?
No, the SN65LVDS250DBT does not integrate 110-Ω termination resistors. That feature is exclusive to the pin-compatible SN65LVDT250DBT variant. The SN65LVDS250DBT requires external 100-Ω differential termination at each output for proper LVDS compliance and signal integrity.
Can the SN65LVDS250DBT accept LVPECL or CML inputs directly?
Yes, the SN65LVDS250DBT inputs are electrically compatible with LVPECL and CML signal levels in addition to LVDS, as confirmed in the TI datasheet SLLS594B. No external level-shifting circuitry is needed - the internal input stage accommodates common-mode voltages from 0 V to 3.3 V.
What is the purpose of the DE (disable/enable) pins on the SN65LVDS250DBT?
Each DE pin (1DE–4DE) independently places its corresponding output pair (e.g., 1Y/1Z) into high-impedance state. This allows dynamic bus sharing, hot-swap isolation, and power-aware routing - critical in redundant clock distribution and multi-source data planes where contention must be avoided.
Is the SN65LVDS250DBT RoHS compliant and what is its moisture sensitivity level?
Yes, the SN65LVDS250DBT is RoHS compliant (lead-free NiPdAu finish) and rated MSL Level-2-260°C-1 year per JEDEC J-STD-020. It ships in tube packaging (50 units) and is qualified for reflow soldering at peak temperatures up to 260°C.
SN65LVDS250DBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDS
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
SN65LVDS250DBT FAQ
1.How can I place an order for SN65LVDS250DBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDS250DBT 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 SN65LVDS250DBT reliable?
The price and inventory of SN65LVDS250DBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDS250DBT is usually 5 days.
3.What payment methods are accepted for SN65LVDS250DBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVDS250DBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVDS250DBT?
SN65LVDS250DBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDS250DBT 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 SN65LVDS250DBT?
For technical support, including SN65LVDS250DBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDS250DBT requirements.
6.How does Aetrix verify that SN65LVDS250DBT is sourced from the original manufacturer or authorized distributors?
All SN65LVDS250DBT 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 SN65LVDS250DBT meets industry standards.
7.What is the process for return or replacement of SN65LVDS250DBT?
All SN65LVDS250DBT units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDS250DBT, 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 SN65LVDS250DBT part is unused and in its original packaging.
Return procedure for SN65LVDS250DBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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