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Texas Instruments SN65LVDS125DBT
- Part No.:
- SN65LVDS125DBT
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN65LVDS125DBT.pdf
- Description:
- IC CROSSPOINT SW 1 X 4:4 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,211
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Product details
Overview
SN65LVDS125DBT from Texas Instruments is a 4×4 non-blocking LVDS crosspoint switch IC used for high-speed signal routing in telecom clock distribution and HDTV video switching systems. It supports 1.5 Gbps per channel signaling, operates from a single 3.3-V supply, features 900 ps typical propagation delay, and includes electrically compatible LVPECL/CML/LVDS inputs.
For engineers reviewing the SN65LVDS125DBT datasheet, SN65LVDS125DBT pinout, SN65LVDS125DBT application, or SN65LVDS125DBT equivalent, key selection criteria include differential skew performance (≤150 ps channel-to-channel), input hysteresis (25 mV), integrated termination absence (vs. SN65LVDT125), and TSSOP-38 package compatibility with high-density PCB layouts.
Technical Context
The SN65LVDS125DBT implements fully differential internal signal paths to maintain low skew at 1.5 Gbps operation, with each of its four outputs configured as a 4:1 multiplexer enabling any input to be routed to any output. Its non-blocking architecture allows independent control of all four output channels via dedicated Sxy select pins and DE enable lines.
Unlike the pin-compatible SN65LVDT125DBT, the SN65LVDS125DBT omits integrated 110-Ω termination resistors-requiring external termination-and targets applications where board-level impedance control and thermal management are prioritized over component count reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 1.5 Gbps per channel - supports SMPTE 292 HDTV video (1.485 Gbps) and OC-12 clock distribution (622 MHz). |
| Propagation Delay | 900 ps typical - enables precise timing alignment across multiple high-speed data lanes. |
| Input Threshold Hysteresis | 25 mV - improves noise immunity against ground bounce and crosstalk in dense routing environments. |
| Supply Voltage | 3.3 V nominal (3.0–3.6 V range) - compatible with standard LVDS power domains and avoids level-shifting circuitry. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and telecom infrastructure deployment without derating. |
| Differential Output Swing | 247–454 mV - meets ANSI TIA/EIA-644-A LVDS standard and ensures robust eye opening at 1.5 Gbps. |
| Channel-to-Channel Skew | ≤150 ps - maintains phase coherence across parallel data paths in multi-lane serial interfaces. |
Pinout & Package
TSSOP-38 package (DBT suffix), 12.6 mm × 4.4 mm body, 0.5 mm pitch, exposed thermal pad not present. Pin count and layout conform to JEDEC MO-153 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B – 4A, 4B | Differential LVDS Inputs | Four pairs of fully differential inputs accepting LVDS, LVPECL, and CML signals without external biasing. |
| 1Y, 1Z – 4Y, 4Z | Differential LVDS Outputs | Four matched-output driver pairs with 247–454 mV swing and <150 ps inter-channel skew. |
| S10–S41 | Mux Select Controls | Two-bit binary select per output (e.g., S10/S11 selects source for 1Y/1Z), enabling independent routing. |
| 1DE–4DE | Output Enable/Disable | Individual 3-state control per output pair; high-impedance state reduces system-level loading during reconfiguration. |
| VCC, GND | Power & Ground | Multiple VCC/GND pins distributed across package to minimize simultaneous switching noise and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Non-blocking 4×4 crosspoint | Enables arbitrary input-to-output mapping without contention-critical for dynamic clock muxing in base stations. |
| LVDS-compliant I/O | Fully compliant with ANSI TIA/EIA-644-A, eliminating need for external level translators in mixed-signal backplanes. |
| Low-skew differential routing | ≤150 ps channel-to-channel skew preserves signal integrity across 4-lane parallel interfaces like SMPTE 292. |
| Single 3.3-V supply operation | Reduces power delivery complexity versus dual-supply alternatives; supports direct interface with FPGA I/O banks. |
| −40°C to +85°C temperature range | Validated for continuous operation in uncontrolled ambient environments such as outdoor wireless base station cabinets. |
Applications
| Wireless Base Station Clock Distribution | HDTV Video Switching |
|---|---|
Use Scenario: Routing OC-12 (622 MHz) and SONET clocks between RF transceivers, DSPs, and FPGAs in macrocell BTS. IC Role / Device Role / Timing Role: Low-skew clock buffer and mux enabling dynamic frequency selection and redundancy switching. Use Value: 150 ps max channel skew and 1.5 Gbps capability ensure deterministic jitter accumulation stays below 1 UI for 10G Ethernet sync recovery. | Use Scenario: Switching SMPTE 292 HD-SDI video streams between camera inputs, processing units, and display outputs in broadcast switchers. IC Role / Device Role / Timing Role: High-bandwidth differential signal router preserving eye diagram integrity across 4 independent video lanes. Use Value: 247–454 mV differential output swing and 900 ps propagation delay maintain >300 mV eye height at 1.485 Gbps after 30 m cable runs. |
| High-Speed Network Router Backplane | Test Equipment Signal Path Control |
Use Scenario: Interconnecting 10-Gigabit Ethernet PHYs, packet processors, and SerDes lanes on modular line cards. IC Role / Device Role / Timing Role: Reconfigurable signal path manager supporting hot-swap and protocol adaptation without hardware change. Use Value: Independent 1DE–4DE enables live lane disablement during diagnostics while maintaining traffic on remaining paths. | Use Scenario: Automated test fixture routing of calibrated reference clocks and high-speed stimulus signals to DUT inputs. IC Role / Device Role / Timing Role: Precision timing path selector with sub-nanosecond delay matching across all four channels. Use Value: 25 mV input hysteresis rejects noise from relay drivers and adjacent switching circuits during automated test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS crosspoint switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDT125DBT | Includes integrated 110-Ω termination resistors; otherwise identical pinout, timing, and logic. | Better suited for space-constrained designs where board-level termination adds layout complexity or cost. | Select SN65LVDT125DBT when minimizing external components outweighs thermal/power trade-offs from on-die termination. |
| MAX9156EEE+ | 3.3-V 4×4 LVDS crosspoint with 1.25 Gbps max rate; different pinout and no Sxy select architecture. | Targeted at lower-speed instrumentation and medical imaging where 150 Mbps margin suffices. | Choose MAX9156EEE+ only if design tolerates 17% lower bandwidth and accepts redesign of control logic and layout. |
Compared with SN65LVDT125DBT, the SN65LVDS125DBT trades integrated termination for improved thermal dissipation and layout flexibility; versus MAX9156EEE+, it delivers 20% higher signaling rate and deterministic 4:1 mux control-making it the preferred choice for OC-12 and SMPTE 292 deployments requiring guaranteed 1.5 Gbps operation.
Availability
SN65LVDS125DBT is available at Aetrix Electronics and suitable for wireless base station clock distribution, HDTV video switching, and high-speed network routing requiring stable component supply across extended product lifecycles.
Supply support for SN65LVDS125DBT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and high-speed interface solutions for industrial, automotive, and communications markets.
The SN65LVDS125DBT belongs to TI's high-speed LVDS interface portfolio, engineered specifically for telecom infrastructure and broadcast video systems demanding sub-nanosecond timing precision and multi-gigabit signal integrity.
FAQ
What is the maximum signaling rate supported by the SN65LVDS125DBT?
The SN65LVDS125DBT supports up to 1.5 Gbps per channel, validated with 223−1 PRBS patterns and confirmed in eye diagram testing at 1.5 Gbps. This rate satisfies SMPTE 292 (1.485 Gbps) and OC-12 (622 MHz) clocking requirements. The SN65LVDS125DBT maintains this performance across its full −40°C to +85°C operating range with typical propagation delay of 900 ps.
Does the SN65LVDS125DBT include integrated termination resistors?
No, the SN65LVDS125DBT does not include integrated 110-Ω termination resistors. That feature is exclusive to the SN65LVDT125DBT variant. The SN65LVDS125DBT requires external 100-Ω differential termination at each output to meet ANSI TIA/EIA-644-A LVDS specifications and ensure optimal signal integrity at 1.5 Gbps.
How many independent output channels does the SN65LVDS125DBT provide?
The SN65LVDS125DBT provides four independent differential output channels (1Y/1Z through 4Y/4Z), each configurable as a 4:1 multiplexer with dedicated select (S10/S11 through S40/S41) and enable (1DE through 4DE) controls. This architecture enables true non-blocking 4×4 crosspoint functionality, allowing any input to drive any output simultaneously without contention.
What supply voltage range is required for reliable operation of the SN65LVDS125DBT?
The SN65LVDS125DBT requires a supply voltage between 3.0 V and 3.6 V, with 3.3 V being the nominal operating point. Operation outside this range may cause functional failure or permanent damage. The device draws 107–145 mA typical supply current at 3.3 V under load, and its thermal design supports up to 847 mW power dissipation at 85°C ambient in the TSSOP-38 package.
Can the SN65LVDS125DBT accept LVPECL and CML inputs directly?
Yes, the SN65LVDS125DBT inputs are electrically compatible with LVPECL, CML, and LVDS signal levels without external level-shifting circuitry. Input common-mode voltage range spans 0 V to 3.3 V, and differential input sensitivity supports |VID| ≥ 100 mV, enabling direct connection to diverse high-speed sources including FPGA transceivers and ASIC clock outputs.
SN65LVDS125DBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDS
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
SN65LVDS125DBT FAQ
1.How can I place an order for SN65LVDS125DBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDS125DBT 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 SN65LVDS125DBT reliable?
The price and inventory of SN65LVDS125DBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDS125DBT is usually 5 days.
3.What payment methods are accepted for SN65LVDS125DBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVDS125DBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVDS125DBT?
SN65LVDS125DBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDS125DBT 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 SN65LVDS125DBT?
For technical support, including SN65LVDS125DBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDS125DBT requirements.
6.How does Aetrix verify that SN65LVDS125DBT is sourced from the original manufacturer or authorized distributors?
All SN65LVDS125DBT 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 SN65LVDS125DBT meets industry standards.
7.What is the process for return or replacement of SN65LVDS125DBT?
All SN65LVDS125DBT units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDS125DBT, 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 SN65LVDS125DBT part is unused and in its original packaging.
Return procedure for SN65LVDS125DBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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