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Texas Instruments SN65LVDT122PW
- Part No.:
- SN65LVDT122PW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN65LVDT122PW.pdf
- Description:
- IC CROSSPOINT SW 1 X 2:2 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
SN65LVDT122PW 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 input levels, operates from –40°C to 85°C, and delivers <65 ps peak-to-peak jitter at 1.5 Gbps.
For engineers reviewing the SN65LVDT122PW datasheet, SN65LVDT122PW pinout, SN65LVDT122PW application, or SN65LVDT122PW equivalent, key selection criteria include differential signaling integrity up to 1.5 Gbps, on-die 110-Ω termination for board-space-constrained designs, low propagation delay (≤900 ps), wide common-mode input range (0–4 V), and compatibility with fault-tolerant serial backplane protection switching.
Technical Context
The SN65LVDT122PW 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 differential integrity to minimize skew and jitter.
It features electrically compatible inputs accepting LVDS (±100 mV threshold), LVPECL, and CML logic levels, with 25 mV hysteresis over a 0–4 V common-mode range. The integrated 110-Ω termination applies only to the LVDT variant and is active during normal operation and power-down modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max data rate | 1.5 Gbps - supports OC-48/STM-16 and 622-MHz clock distribution without external termination. |
| Total jitter (pp) | ≤65 ps - enables reliable eye opening in high-speed serial links using 223−1 PRBS patterns. |
| Propagation delay | ≤900 ps - ensures sub-nanosecond timing alignment critical for multi-channel clock fanout. |
| Input common-mode range | 0 V to 4 V - accepts LVDS, LVPECL (VTT = VCC − 2 V), and CML signals without level-shifting circuitry. |
| Termination resistance | 110 Ω ±12% - integrated on-chip resistor eliminates two external 55-Ω resistors per channel, reducing BOM count and PCB area. |
| Supply voltage | 3.0 V to 3.6 V - optimized for 3.3-V systems with 712 mW max power dissipation in TSSOP package. |
| Operating temperature | –40°C to 85°C - qualified for industrial and telecom infrastructure environments including wireless basestations. |
Pinout & Package
TSSOP-16 package (PW), 5.0 mm × 4.4 mm × 1.2 mm height, lead pitch 0.65 mm, RoHS-compliant NIPDAU finish, MSL Level-1.
| 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; supports simultaneous dual-source routing. |
| 1Y, 1Z | Differential output pair 1 | LVDS-compliant output with 247–454 mV differential swing and 1.125–1.375 V common-mode voltage. |
| 2Y, 2Z | Differential output pair 2 | Matched delay path to 1Y/1Z; output skew ≤40 ps ensures synchronized fanout. |
| S0, S1 | Configuration select inputs | Two-bit control sets crosspoint mode (00=pass-through, 01=swap, 10=mux, 11=splitter). |
| 1DE, 2DE | Channel enable inputs | Active-high enables respective output channels; high-impedance state entered in <8 ns. |
| VCC | Power supply | Single 3.3-V supply powers all internal circuitry and termination resistors. |
| GND | Ground reference | Two dedicated ground pins (pins 8 and 16) minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 110-Ω termination | Eliminates need for external termination resistors on each output, saving >4 passives and ~3 mm² PCB area per channel. |
| Pin-compatible upgrade | Direct replacement for SN65LVDS22/SN65LVDM22 with identical pinout and footprint-no layout change required. |
| Multi-protocol input support | Accepts LVDS, LVPECL, and CML signals without external biasing or level shifters due to 0–4 V common-mode range. |
| Low-skew switching | Output skew ≤40 ps and pulse skew ≤50 ps maintain timing integrity across channels in clock multiplexing applications. |
| Fast enable/disable control | High-impedance entry/exit in ≤8 ns enables dynamic channel isolation for protection switching in fault-tolerant backplanes. |
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: 2:1 LVDS multiplexer with sub-ns propagation delay and deterministic jitter <65 ps. Use Value: Enables seamless failover without clock interruption or phase discontinuity in SONET/SDH systems. | Use Scenario: Isolating faulty data lanes in high-reliability serial backplanes used in telecom switches. IC Role / Device Role / Timing Role: Dual-channel LVDS repeater with independent enable control (1DE/2DE) and fast disable (<8 ns). Use Value: Prevents fault propagation while maintaining signal integrity on healthy lanes during hot-swap events. |
| 622-MHz Central Office Clock Distribution | Wireless Basestation RF Front-End Timing |
Use Scenario: Fanout and buffering of ultra-low-jitter 622-MHz reference clocks across multiple DSP/FPGA domains. IC Role / Device Role / Timing Role: Low-jitter LVDS repeater with total jitter <65 ps and part-to-part skew ≤100 ps. Use Value: Preserves clock purity across distributed timing paths, meeting stringent BER requirements in carrier-grade infrastructure. | Use Scenario: Routing and conditioning of synchronization signals (e.g., CPRI, OBSAI) between BBUs and remote radio heads. IC Role / Device Role / Timing Role: 2×2 crosspoint switch supporting LVDS-to-LVPECL translation via internal common-mode handling. Use Value: Simplifies interconnect design by eliminating discrete level-shifters while maintaining signal fidelity 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 |
|---|---|---|---|
| SN65LVDS122PW | No integrated termination; requires external 100-Ω differential loads on outputs. | Better suited for systems where board space is not constrained and termination must be tuned per trace impedance. | Select when precise 100-Ω matching is required and external resistor placement is acceptable. |
| SN65LVDT22PW | Single 2×2 crosspoint with identical termination but different pinout (non-pin-compatible); lacks S0/S1 configuration flexibility. | Targeted at fixed-function repeater roles rather than programmable routing. | Select only if pinout redesign is feasible and dynamic configuration is unnecessary. |
Compared with SN65LVDS122PW, the SN65LVDT122PW reduces component count and layout complexity via on-die 110-Ω termination, while SN65LVDT22PW offers simplified control but sacrifices configurability and pin compatibility-making SN65LVDT122PW optimal for space-constrained, multi-mode routing applications.
Availability
SN65LVDT122PW is available at Aetrix Electronics and suitable for optical module clock multiplexing, serial backplane protection switching, and 622-MHz central office clock distribution requiring stable component supply across extended production lifecycles.
Supply support for SN65LVDT122PW 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 technologies with decades of high-speed interface innovation.
The SN65LVDT122PW belongs to TI's LVDS interface product line, engineered specifically for high-reliability, high-bandwidth signal routing in telecom infrastructure, optical networking, and wireless baseband systems.
FAQ
What is the function of the S0 and S1 pins on the SN65LVDT122PW?
The S0 and S1 pins on the SN65LVDT122PW are 2-bit configuration select inputs that determine the internal signal routing mode: 00 enables direct pass-through, 01 swaps input pairs, 10 configures as a 2:1 multiplexer, and 11 acts as a 1:2 splitter. This allows a single SN65LVDT122PW to replace multiple discrete logic functions without changing hardware.
Does the SN65LVDT122PW require external termination resistors?
No, the SN65LVDT122PW integrates 110-Ω termination resistors on both output channels, eliminating the need for external 55-Ω resistors per differential pair. This feature is exclusive to the LVDT variant and is confirmed in the datasheet's "ORDERING INFORMATION" table and electrical characteristics section under RT parameter.
What input signal standards does the SN65LVDT122PW support?
The SN65LVDT122PW supports LVDS, LVPECL, and CML input standards due to its 0–4 V common-mode input range and 25 mV receiver hysteresis. It accepts differential input voltages from ±100 mV (LVDS) up to ±1000 mV (LVPECL), as verified in Table 1 and the "INPUT ELECTRICAL CHARACTERISTICS" section of the datasheet.
What is the maximum operating temperature range for the SN65LVDT122PW?
The SN65LVDT122PW is characterized for operation from –40°C to +85°C ambient temperature, as explicitly stated in the "RECOMMENDED OPERATING CONDITIONS" table and confirmed across all timing, jitter, and electrical specifications in the datasheet.
How does the SN65LVDT122PW differ from the SN65LVDS122PW?
The SN65LVDT122PW differs from the SN65LVDS122PW by integrating 110-Ω termination resistors on both output channels, whereas the SN65LVDS122PW requires external termination. Both share identical pinout, package, and functional capability-but only the LVDT variant provides on-die termination to reduce BOM and PCB area.
SN65LVDT122PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDT
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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-TSSOP
SN65LVDT122PW FAQ
1.How can I place an order for SN65LVDT122PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDT122PW 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 SN65LVDT122PW reliable?
The price and inventory of SN65LVDT122PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDT122PW is usually 5 days.
3.What payment methods are accepted for SN65LVDT122PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVDT122PW transactions.
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4.How is shipping managed for SN65LVDT122PW?
SN65LVDT122PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDT122PW 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 SN65LVDT122PW?
For technical support, including SN65LVDT122PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDT122PW requirements.
6.How does Aetrix verify that SN65LVDT122PW is sourced from the original manufacturer or authorized distributors?
All SN65LVDT122PW 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 SN65LVDT122PW meets industry standards.
7.What is the process for return or replacement of SN65LVDT122PW?
All SN65LVDT122PW units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDT122PW, 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 SN65LVDT122PW part is unused and in its original packaging.
Return procedure for SN65LVDT122PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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