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Texas Instruments SN65LVDT122D
- Part No.:
- SN65LVDT122D
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN65LVDT122D.pdf
- Description:
- IC CROSSPOINT SW 1 X 2:2 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:134
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Product details
Overview
SN65LVDT122D from Texas Instruments is a 1.5-Gbps 2×2 LVDS crosspoint switch with integrated 110-Ω termination resistors, designed for high-speed signal routing in optical modules and clock distribution systems. It supports LVDS, LVPECL, and CML inputs across 0–4-V common-mode range, delivers <65 ps peak-to-peak jitter at 1.5 Gbps, and operates from –40°C to 85°C on 3.3-V supply.
For engineers reviewing the SN65LVDT122D datasheet, SN65LVDT122D pinout, SN65LVDT122D application, or SN65LVDT122D equivalent, this page provides verified electrical specifications, functional configuration logic, SOIC-16 package details, real-world use scenarios in serial backplanes and protection switching, and validated alternative parts for design flexibility.
Technical Context
The SN65LVDT122D implements a fully differential 2×2 crosspoint architecture with two independent enable inputs (1DE, 2DE) and dual select lines (S0, S1) to configure operation as crosspoint switch, 2:1 multiplexer, 1:2 splitter, or dual repeater. Internal signal paths preserve LVDS integrity with sub-900-ps max propagation delay and <50-ps output skew.
It integrates 110-Ω on-die termination on both outputs (1Y/1Z, 2Y/2Z), eliminating external resistors and reducing board space-distinct from the non-terminated SN65LVDS122D. Input threshold hysteresis is 25 mV over 0–4-V common-mode range, enabling robust interfacing with multiple logic families without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max signaling rate | 1.5 Gbps - supports OC-48/STM-16 and 622-MHz clock distribution without degradation |
| Total jitter (pk-pk) | ≤65 ps at 1.5 Gbps PRBS23 - ensures <10⁻¹² BER in high-reliability serial links |
| Propagation delay | 400–900 ps - enables precise timing alignment in multi-channel clock fanout |
| Input common-mode range | 0 V to 4 V - accepts LVDS, LVPECL, and CML signals without external biasing |
| Termination resistance | 110 Ω ±10% - matches standard LVDS transmission lines, reduces stub reflections |
| Supply voltage | 3.0 V to 3.6 V - optimized for 3.3-V system rails with 8.7 mW/°C derating above 25°C |
| Operating temperature | –40°C to +85°C - qualified for industrial and telecom infrastructure environments |
Pinout & Package
SN65LVDT122D is housed in a 16-pin SOIC (D) package, 7.5 mm × 10.3 mm body, 1.75 mm height, with 1.27 mm pitch. Pin 1 index located at top-left corner; pins numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1B, 1A | Differential input pair 1 | Accepts LVDS/LVPECL/CML signals; VID ≥100 mV required for valid logic detection |
| 2B, 2A | Differential input pair 2 | Independent second input channel; electrically identical to 1A/1B |
| 1Y, 1Z | Differential output pair 1 | LVDS-compliant output with integrated 110-Ω termination; VOC = 1.125–1.375 V |
| 2Y, 2Z | Differential output pair 2 | Second terminated LVDS output; supports simultaneous 2×2 switching or split buffering |
| S0, S1 | Configuration select inputs | Set crosspoint mode (00=pass-through, 01=swap, 10=mux, 11=splitter); CMOS-compatible |
| 1DE, 2DE | Output enable controls | High-impedance disable per output; tPHZ/tPLZ = 6–8 ns ensures clean bus isolation |
| VCC | Power supply | Single 3.3-V rail powers all I/O and internal logic; decoupling required at each VCC pin |
| GND | Ground reference | Two dedicated ground pins (pins 8 and 15) minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 110-Ω termination | Eliminates four external resistors per output, saving PCB area and reducing parasitic mismatch |
| 25-mV input hysteresis | Prevents metastability during slow-rising or noisy input transitions across full 0–4-V common-mode range |
| Pin-compatible upgrade | Direct replacement for SN65LVDS22/SN65LVDM22 with identical footprint and logic interface |
| Low pulse skew (≤50 ps) | Maintains phase alignment between outputs for clock distribution and parallel data lanes |
| Multi-standard input compatibility | Accepts LVDS, LVPECL, and CML without external level shifters or bias networks |
Applications
| Optical Module Clock Multiplexing | Serial Backplane Protection Switching |
|---|---|
Use Scenario: Selecting between primary and backup clock sources in 10-G (OC-192) optical line cards. IC Role / Device Role / Timing Role: Dual-input, dual-output LVDS crosspoint switch performing hitless clock switchover with <2.6 ns select-to-output delay. Use Value: Enables fault-tolerant timing architecture with deterministic jitter ≤65 ps, preserving bit-error-rate integrity during failover. | Use Scenario: Isolating faulty data lanes in high-speed serial backplanes while maintaining link continuity. IC Role / Device Role / Timing Role: Reconfigurable 2×2 switch providing loopback diagnostics and redundant path selection under control of FPGA GPIOs. Use Value: Supports hot-swap-capable systems by enabling software-controlled lane rerouting without physical intervention or timing disruption. |
| Wireless Basestation Clock Fanout | Low-Jitter Clock Repeater |
Use Scenario: Distributing a single 622-MHz reference clock to multiple RF transceiver ASICs in LTE/5G basestations. IC Role / Device Role / Timing Role: 1:2 LVDS splitter with matched propagation delay (tsk(p) ≤50 ps) and integrated termination. Use Value: Delivers phase-aligned, low-skew copies to four downstream receivers, eliminating need for discrete termination networks. | Use Scenario: Boosting signal integrity of degraded clock signals traversing long PCB traces or flex cables. IC Role / Device Role / Timing Role: LVDS translator/repeater restoring edge rate (tr/tf ≤280 ps) and suppressing deterministic jitter (tjit(det) ≤50 ps). Use Value: Extends usable trace length by >30% compared to direct routing, while maintaining <10⁻¹² BER at 1.5 Gbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS crosspoint switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDS122D | No integrated termination; requires external 100-Ω resistors on each output | Better suited for designs needing configurable termination or lower power (ICC = 35 mA vs. 45 mA) | Select when board layout allows space for discrete termination and thermal budget is constrained |
| SN65LVDT122PW | Identical functionality and specs, but in TSSOP-16 (4.4 mm × 5 mm) instead of SOIC-16 | Preferred for space-constrained designs where 40% smaller footprint offsets slightly higher thermal resistance | Select when PCB area is premium and reflow profile supports Level-1 MSL handling |
Compared with SN65LVDS122D and SN65LVDT122PW, the SN65LVDT122D uniquely combines SOIC-16 manufacturability, integrated 110-Ω termination, and industrial temperature support-making it optimal for cost-sensitive, high-volume telecom clock distribution where board space and assembly yield are critical.
Availability
SN65LVDT122D is available at Aetrix Electronics and suitable for optical module manufacturing, wireless basestation clock distribution, and serial backplane protection switching requiring stable component supply across extended production lifecycles.
Supply support for SN65LVDT122D 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The SN65LVDT122D belongs to TI's high-speed interface portfolio, engineered specifically for low-jitter, multi-standard LVDS signal routing in telecom infrastructure and datacom equipment.
FAQ
What is the maximum data rate supported by the SN65LVDT122D?
The SN65LVDT122D is characterized for reliable operation up to 1.5 Gbps with 2²³−1 PRBS input patterns, delivering ≤65 ps peak-to-peak jitter. While some applications achieve 2 Gbps under ideal loading and signal quality conditions, TI specifies 1.5 Gbps as the guaranteed maximum signaling rate for production designs using the SN65LVDT122D.
Does the SN65LVDT122D require external termination resistors?
No. The SN65LVDT122D integrates 110-Ω termination resistors on both differential output pairs (1Y/1Z and 2Y/2Z), eliminating the need for external resistors. This distinguishes it from the SN65LVDS122D and reduces PCB area, component count, and impedance mismatch risk in high-speed layouts.
Can the SN65LVDT122D interface directly with LVPECL and CML sources?
Yes. The SN65LVDT122D accepts LVPECL and CML inputs across its full 0–4-V common-mode input range without external biasing or level shifting. Its 25-mV input hysteresis and wide VIC tolerance ensure robust logic detection even with slow edges or noise, making the SN65LVDT122D suitable for mixed-signaling environments.
How does the SN65LVDT122D differ from the SN65LVDS122D?
The SN65LVDT122D adds integrated 110-Ω termination resistors on both outputs, while the SN65LVDS122D requires external 100-Ω resistors. Both share identical pinout, timing, and logic functions. The SN65LVDT122D draws slightly higher supply current (45 mA vs. 35 mA) due to termination circuitry, but simplifies layout and improves signal integrity in dense routing scenarios.
What package options are available for the SN65LVDT122D?
The SN65LVDT122D is offered exclusively in the SOIC-16 (D) package: 7.5 mm × 10.3 mm body, 1.27 mm lead pitch, 1.75 mm max height. Alternative package variants include SN65LVDT122PW in TSSOP-16, but the SN65LVDT122D designation specifically identifies the SOIC version with tube packaging (40 units per tube).
SN65LVDT122D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Crosspoint Switch
- Circuit:
- 1 x 2:2
- 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:
- 16-SOIC
SN65LVDT122D FAQ
1.How can I place an order for SN65LVDT122D through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDT122D 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 SN65LVDT122D reliable?
The price and inventory of SN65LVDT122D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDT122D is usually 5 days.
3.What payment methods are accepted for SN65LVDT122D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVDT122D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVDT122D?
SN65LVDT122D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDT122D 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 SN65LVDT122D?
For technical support, including SN65LVDT122D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDT122D requirements.
6.How does Aetrix verify that SN65LVDT122D is sourced from the original manufacturer or authorized distributors?
All SN65LVDT122D 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 SN65LVDT122D meets industry standards.
7.What is the process for return or replacement of SN65LVDT122D?
All SN65LVDT122D units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDT122D, 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 SN65LVDT122D part is unused and in its original packaging.
Return procedure for SN65LVDT122D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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