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Texas Instruments SN65LVDT125ADBT
- Part No.:
- SN65LVDT125ADBT
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN65LVDT125ADBT.pdf
- Description:
- IC CROSSPOINT SW 1 X 4:4 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
SN65LVDT125ADBT from Texas Instruments is a 4×4 non-blocking LVDS crosspoint switch with integrated 110-Ω termination resistors, supporting 1.5 Gbps signaling per channel, 900 ps typical propagation delay, and operation from a single 3.3-V supply. It routes high-speed serial data in telecom backplanes and HDTV video switching systems where board space is constrained.
For engineers reviewing the SN65LVDT125ADBT datasheet, SN65LVDT125ADBT pinout, SN65LVDT125ADBT application, or SN65LVDT125ADBT equivalent, this page delivers verified electrical specs, real-world timing behavior (including 150 ps channel-to-channel skew), thermal limits (−40°C to 85°C), and precise TSSOP-38 package interface details required for signal integrity validation and layout implementation.
Technical Context
The SN65LVDT125ADBT implements a fully differential 4×4 crosspoint architecture with independent 4:1 multiplexers per output, enabling any input pair (1A/1B–4A/4B) to be routed to any output pair (1Y/1Z–4Y/4Z) without blocking. Its internal signal paths maintain tight differential balance to minimize skew and support SMPTE 292-compliant 1.485 Gbps video transport.
Unlike the SN65LVDS125A, the SN65LVDT125ADBT integrates on-die 110-Ω termination resistors on all inputs and outputs-reducing external component count and PCB area while preserving LVDS compliance (ANSI TIA/EIA-644-A) and enabling direct connection to unterminated traces or point-to-point links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 1.5 Gbps per channel - supports OC-12 (622 MHz) clocks and SMPTE 292 HDTV video at 1.485 Gbps without retiming. |
| Propagation Delay | 900 ps typical - enables sub-nanosecond timing alignment across four parallel high-speed data lanes. |
| Channel-to-Channel Skew | 150 ps maximum - ensures deterministic phase relationship between routed outputs for multi-lane synchronization. |
| Differential Output Voltage | 247–454 mV - meets LVDS standard swing requirements and drives 100-Ω differential loads robustly. |
| Input Threshold Hysteresis | 25 mV - provides noise immunity against ground bounce and crosstalk in dense routing environments. |
| Integrated Termination | 110 Ω ±10% - eliminates need for external 100-Ω resistors, reducing BOM count and saving >4 mm² PCB area per channel. |
| Supply Voltage | 3.0–3.6 V - compatible with standard 3.3-V logic rails and tolerant of rail droop during transient load conditions. |
Pinout & Package
TSSOP-38 package (DBT), 9.75 mm × 4.45 mm × 1.2 mm max height, moisture sensitivity level 2 (260°C peak reflow), RoHS-compliant NIPDAU finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A–4A, 1B–4B | LVDS differential input pairs | Accepts LVDS, LVPECL, and CML signals; common-mode range 0–3.3 V; VID ≥100 mV required for reliable switching. |
| 1Y–4Y, 1Z–4Z | LVDS differential output pairs | Delivers compliant LVDS output (VOD = 247–454 mV, VOC = 1.125–1.375 V); each pair includes integrated 110-Ω termination. |
| 1DE–4DE | Output disable control (active-low) | Places corresponding Y/Z driver in high-impedance state; IOZ ≤ ±1 µA ensures minimal bus leakage when disabled. |
| S10–S41 | 2-bit select inputs per output | Configures routing matrix: S10/S11 selects source for 1Y/1Z; identical logic applies to S20/S21 → 2Y/2Z, etc. |
| VCC, GND | Power and ground terminals | Single 3.3-V supply; 38-pin layout includes multiple VCC/GND pairs to reduce power delivery impedance and suppress simultaneous switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Non-blocking 4×4 crosspoint | Enables arbitrary input-to-output mapping without contention-critical for redundant clock distribution and dynamic video path switching. |
| On-die 110-Ω termination | Reduces external component count by eight 100-Ω resistors and associated routing, simplifying layout and improving SI predictability. |
| 150-ps channel skew | Supports time-aligned multi-lane protocols (e.g., dual-link DVI, SMPTE 424M) without external deskew circuitry. |
| 25-mV input hysteresis | Rejects <150 mV of superimposed noise on differential inputs-essential in noisy backplane or mixed-signal environments. |
| 1.5-Gbps PRBS jitter performance | tjit(pp) = 65–110 ps (223-1 PRBS) - meets jitter budgets for broadcast-grade video and SONET/SDH line interfaces. |
Applications
| Telecom Clock Distribution | HDTV Video Switching |
|---|---|
Use Scenario: Routing OC-12/STM-4 reference clocks across redundant backplane paths in wireless base station controllers. IC Role / Device Role / Timing Role: Low-skew, non-blocking switch that maintains phase coherence between primary and backup clock domains. Use Value: Eliminates need for discrete terminations and reduces inter-channel skew to ≤150 ps-enabling hitless switchover without PLL relock. |
Use Scenario: Dynamic selection of dual-link HD-SDI sources in broadcast production switchers handling 1080p60 video. IC Role / Device Role / Timing Role: High-bandwidth LVDS crosspoint that preserves eye integrity at 1.485 Gbps (SMPTE 292). Use Value: Integrated 110-Ω termination ensures consistent impedance matching across all 4×4 paths, preventing reflections that degrade video BER. |
| High-Speed Network Routing | Test Equipment Signal Path Control |
Use Scenario: Configurable data lane assignment in 10-Gigabit Ethernet line cards with multiple SerDes PHYs. IC Role / Device Role / Timing Role: Reconfigurable interconnect enabling flexible mapping of MAC-to-PHY lanes without hardware changes. Use Value: 1.5-Gbps capability exceeds 10GbE NRZ line rate (10.3125 Gbps aggregate), supporting forward error correction overhead. |
Use Scenario: Automated signal routing in high-frequency oscilloscope calibration fixtures requiring sub-ns path consistency. IC Role / Device Role / Timing Role: Precision-controlled switch with <50 ps pulse skew (tsk(p)) for calibrated delay path selection. Use Value: Tight propagation delay matching (±100 ps) across all channels enables traceable, repeatable instrument calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS crosspoint switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDS125ADBT | No integrated termination; requires external 100-Ω resistors on all I/O; otherwise identical pinout, timing, and logic. | Better suited for systems with existing board-level termination or where termination value must be tuned (e.g., 90–110 Ω). | Select SN65LVDS125ADBT when board layout allows space for external resistors and fine-grained impedance control is needed. |
| MAX9156EEE+ | 3.3-V only, 4×4 LVDS crosspoint, but no integrated termination; higher 1.2 ns max propagation delay; different pinout (QSOP-28). | Targeted at industrial instrumentation with less stringent skew requirements (<300 ps) and lower data rates (<1.25 Gbps). | Choose MAX9156EEE+ only if migrating from legacy Maxim designs and accepting reduced speed/skew performance. |
Compared with SN65LVDS125ADBT, the SN65LVDT125ADBT saves PCB area and improves signal integrity via on-die termination, while MAX9156EEE+ offers pinout compatibility with older Maxim platforms but sacrifices 300 ps of skew margin and 250 Mbps of bandwidth.
Availability
SN65LVDT125ADBT is available at Aetrix Electronics and suitable for telecom infrastructure, broadcast video equipment, and high-speed test instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for SN65LVDT125ADBT 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 over 50 years of innovation in signal integrity and timing products.
The SN65LVDT125ADBT belongs to TI's LVDS interface portfolio, engineered specifically for high-reliability, high-density routing of multi-gigabit serial data in space-constrained telecom and video systems.
FAQ
What is the maximum data rate supported by the SN65LVDT125ADBT?
The SN65LVDT125ADBT supports signaling rates up to 1.5 Gbps per channel, validated with 223-1 PRBS patterns and confirmed in eye diagram testing at 1.5 Gbps. This enables use in SMPTE 292 HDTV (1.485 Gbps) and OC-12 (622 MHz) clock distribution applications. The device maintains specified jitter (tjit(pp) ≤ 110 ps) and voltage thresholds across its full operating temperature range (−40°C to 85°C).
Does the SN65LVDT125ADBT require external termination resistors?
No, the SN65LVDT125ADBT integrates 110-Ω termination resistors on all eight differential I/O pairs (four inputs and four outputs), eliminating the need for external 100-Ω resistors. This is a key distinction from the pin-compatible SN65LVDS125ADBT, which lacks on-die termination and requires external components. The integrated termination is specified at 90–132 Ω over process/voltage/temperature.
How does the SN65LVDT125ADBT handle input signal compatibility?
The SN65LVDT125ADBT accepts LVDS, LVPECL, and CML input levels due to its wide common-mode input range (0–3.3 V) and differential threshold hysteresis (25 mV). Input pins tolerate |VA − VB| up to 1 V and support VID as low as 100 mV. This allows direct interfacing with diverse high-speed sources without level-shifting circuitry-verified in TI's application circuits for LVPECL and CML drivers.
What is the thermal performance of the SN65LVDT125ADBT in a typical PCB layout?
In a standard JEDEC High-K board-mount configuration, the SN65LVDT125ADBT has a junction-to-board thermal resistance (θJB) of 40.3°C/W. At 85°C ambient and 3.3-V supply, its maximum power dissipation is 847 mW. Derating is 15.4 mW/°C above 25°C ambient, ensuring safe operation under continuous 1.5-Gbps traffic with proper copper pour and thermal vias.
Can the SN65LVDT125ADBT be used in systems requiring hot-swap or partial power-down?
Yes-the SN65LVDT125ADBT supports controlled shutdown via individual output disable pins (1DE–4DE), which place corresponding Y/Z drivers into high-impedance state with leakage ≤ ±1 µA. While the device lacks full power-gating, its 3.3-V-only supply and defined absolute maximum ratings (−0.5 V to 4 V on all pins) allow safe operation during sequenced power-up/down in modular systems.
SN65LVDT125ADBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDT
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
SN65LVDT125ADBT FAQ
1.How can I place an order for SN65LVDT125ADBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDT125ADBT 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 SN65LVDT125ADBT reliable?
The price and inventory of SN65LVDT125ADBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDT125ADBT is usually 5 days.
3.What payment methods are accepted for SN65LVDT125ADBT?
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SN65LVDT125ADBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDT125ADBT 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 SN65LVDT125ADBT?
For technical support, including SN65LVDT125ADBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDT125ADBT requirements.
6.How does Aetrix verify that SN65LVDT125ADBT is sourced from the original manufacturer or authorized distributors?
All SN65LVDT125ADBT 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 SN65LVDT125ADBT meets industry standards.
7.What is the process for return or replacement of SN65LVDT125ADBT?
All SN65LVDT125ADBT units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDT125ADBT, 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 SN65LVDT125ADBT part is unused and in its original packaging.
Return procedure for SN65LVDT125ADBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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