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Texas Instruments SN65LVDS122PW
- Part No.:
- SN65LVDS122PW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN65LVDS122PW.pdf
- Description:
- IC CROSSPOINT SW 1 X 2:2 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,560
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Product details
Overview
SN65LVDS122PW from Texas Instruments is a 1.5-Gbps 2×2 LVDS crosspoint switch in TSSOP-16 package, supporting LVDS/LVPECL/CML input compatibility, 900-ps max propagation delay, 65-ps peak-to-peak jitter at 1.5 Gbps, and –40°C to 85°C operation. It enables loopback switching, clock/data fanout buffering, and protection switching in serial backplanes.
For engineers reviewing the SN65LVDS122PW datasheet, SN65LVDS122PW pinout, SN65LVDS122PW application, or SN65LVDS122PW equivalent, key selection criteria include differential signaling integrity up to 1.5 Gbps, 0-V to 4-V common-mode input range, 25-mV receiver hysteresis, and pin-compatible upgrade path from SN65LVDS22/SN65LVDM22.
Technical Context
The SN65LVDS122PW implements a fully differential 2×2 crosspoint architecture with two independent differential input pairs (1A/1B, 2A/2B) and two differential output pairs (1Y/1Z, 2Y/2Z), controlled by dual select lines S0/S1 and enable pins 1DE/2DE. Internal signal paths preserve LVDS integrity without single-ended conversion.
It supports four configurable modes-crosspoint switch, 2:1 multiplexer, 1:2 splitter, or dual repeater-via logic-level S0/S1 inputs. Unlike SN65LVDT122, it omits integrated 110-Ω termination resistors, requiring external termination for impedance matching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 1.5 Gbps - supports OC-48/STM-16 and 622-MHz clock distribution without signal degradation. |
| Propagation Delay | Max 900 ps - ensures sub-nanosecond timing alignment critical for high-speed serial interconnects. |
| Total Jitter | ≤65 ps peak-to-peak at 1.5 Gbps PRBS23–1 - meets jitter budget requirements for optical module clock repeaters. |
| Input Compatibility | LVDS, LVPECL, CML - accepts industry-standard differential logic families without level-shifting circuitry. |
| Common-Mode Range | 0 V to 4 V - accommodates wide-voltage swing sources including terminated LVPECL drivers. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom infrastructure environments. |
| Supply Voltage | 3.0 V to 3.6 V nominal - optimized for 3.3-V system rails with 6.2 mW/°C derating above 25°C. |
Pinout & Package
TSSOP-16 package (PW), 4.4 mm × 5.0 mm footprint, 1.2 mm max height, 0.65 mm lead pitch, 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 2:1 mux or crosspoint routing. |
| 1Y, 1Z | Differential Output Pair 1 | Drives 100-Ω differential load; VOD = 247–454 mV typical at 3.3 V. |
| 2Y, 2Z | Differential Output Pair 2 | Second output channel; supports simultaneous 2×2 switching or dual repeater mode. |
| S0, S1 | Configuration Select Inputs | Set crosspoint/mux/splitter mode per truth table; CMOS-compatible 0.8 V/2.0 V thresholds. |
| 1DE, 2DE | Output Enable Controls | High-impedance outputs when low; tPHZ/tPLZ ≤8 ns ensures fast disable timing. |
| VCC | Power Supply | Single 3.3-V supply; 712 mW max power dissipation at TA = 25°C. |
| GND | Ground Reference | Two dedicated ground pins (pins 8 and 16) minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible speed upgrade | Direct replacement for SN65LVDS22/SN65LVDM22 with identical pinout and footprint. |
| Configurable topology | Four modes (crosspoint, 2:1 mux, 1:2 splitter, dual repeater) enabled via S0/S1 logic levels. |
| Low-jitter performance | 65-ps peak-to-peak jitter at 1.5 Gbps ensures reliable eye opening in OC-192 optical modules. |
| Wide-input common-mode range | 0–4 V range eliminates need for external biasing when interfacing to LVPECL or CML sources. |
| Fast enable/disable control | 6–8 ns propagation to high-impedance state enables dynamic signal path isolation in fault-tolerant systems. |
Applications
| Optical Module Clock Distribution | Serial Backplane Protection Switching |
|---|---|
Use Scenario: Distributing low-jitter 622-MHz or 1.25-GHz clocks across multiple line cards in OC-48/STM-16 optical modules. IC Role / Device Role / Timing Role: Low-jitter clock repeater/multiplexer with deterministic skew control between output channels. Use Value: Maintains <65-ps jitter at 1.5 Gbps, preserving BER margin in synchronous optical networks. | Use Scenario: Providing redundant signal paths in telecom backplanes where primary link failure triggers automatic failover. IC Role / Device Role / Timing Role: Crosspoint switch enabling real-time rerouting of high-speed data streams without protocol interruption. Use Value: Sub-3-ns switch time (tSWITCH ≤2.6 ns) minimizes packet loss during protection switching events. |
| Wireless Basestation Baseband Interconnect | Central Office Clock Fanout |
Use Scenario: Interfacing FPGA-based baseband processors with RF transceivers using LVDS or LVPECL signaling standards. IC Role / Device Role / Timing Role: Signal translator and repeater bridging mismatched logic families (e.g., LVPECL-to-LVDS). Use Value: 0–4 V common-mode input range accepts unbuffered LVPECL outputs directly, reducing component count. | Use Scenario: Fanning out a central 622-MHz clock to multiple SONET framer ICs in carrier-grade central office equipment. IC Role / Device Role / Timing Role: Dual-output repeater ensuring matched propagation delay (<50-ps skew) across all downstream clocks. Use Value: 10-ps pulse skew (tsk(p)) guarantees tight phase alignment required for multi-channel synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS crosspoint switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDS122D | SOIC-16 package (6.2 mm × 10.2 mm); higher thermal resistance (8.7 mW/°C derating); same electrical specs. | Better suited for prototyping or low-volume boards where TSSOP reflow is not available. | Select SN65LVDS122D if board space allows larger SOIC footprint and manual soldering is preferred. |
| SN65LVDT122PW | Includes integrated 110-Ω termination resistors on outputs; otherwise identical pinout, timing, and voltage specs. | Reduces PCB area and BOM count in space-constrained designs where on-die termination suffices. | Choose SN65LVDT122PW only when internal termination eliminates need for discrete 100-Ω resistors and layout simplification is prioritized. |
Compared with SN65LVDS122D, SN65LVDS122PW offers 30% smaller footprint and improved thermal performance in volume production; compared with SN65LVDT122PW, it requires external termination but provides full design flexibility for custom impedance matching and DC-coupled applications.
Availability
SN65LVDS122PW is available at Aetrix Electronics and suitable for optical module clock distribution, serial backplane protection switching, and wireless basestation interconnect requiring stable component supply across industrial temperature ranges.
Supply support for SN65LVDS122PW 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN65LVDS122PW belongs to TI's high-speed interface portfolio, engineered specifically for low-jitter, multi-gigabit differential signal routing in telecom infrastructure and optical networking equipment.
FAQ
What is the maximum data rate supported by the SN65LVDS122PW?
The SN65LVDS122PW is characterized for signaling rates up to 1.5 Gbps with 223–1 PRBS pattern, achieving ≤65-ps peak-to-peak jitter. While some applications may operate at 2 Gbps under optimal loading and signal quality conditions, TI specifies 1.5 Gbps as the guaranteed performance limit for SN65LVDS122PW across its full operating temperature range.
Does the SN65LVDS122PW include integrated termination resistors?
No, the SN65LVDS122PW does not integrate termination resistors. Unlike the SN65LVDT122PW variant, it requires external 100-Ω differential termination at each output (1Y/1Z and 2Y/2Z) to maintain signal integrity. This design gives layout engineers full control over termination placement and DC coupling configuration.
How does the SN65LVDS122PW differ from SN65LVDS22 in terms of performance?
The SN65LVDS122PW is a pin-compatible speed upgrade to SN65LVDS22, supporting 1.5 Gbps versus SN65LVDS22's 800 Mbps limit. It retains identical pinout and package options but improves propagation delay (900 ps vs. 1.2 ns max) and reduces jitter (65 ps vs. >100 ps), making SN65LVDS122PW suitable for next-generation OC-192 and 10G Ethernet applications.
Can the SN65LVDS122PW accept LVPECL inputs directly?
Yes, the SN65LVDS122PW accepts LVPECL inputs directly due to its 0-V to 4-V common-mode input voltage range and 25-mV input hysteresis. When interfacing with standard 3.3-V LVPECL drivers, no level-shifting circuitry is needed - the device correctly interprets differential swings while rejecting common-mode noise up to 4 V.
What are the thermal limitations of the SN65LVDS122PW in TSSOP package?
The SN65LVDS122PW in TSSOP-16 has a power dissipation rating of 712 mW at TA = 25°C, derating linearly at 6.2 mW/°C above that temperature. At maximum operating temperature (85°C), usable power drops to 340 mW. Adequate PCB copper area and airflow are recommended to maintain junction temperature within safe limits during sustained 1.5-Gbps operation.
SN65LVDS122PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVDS
- 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
SN65LVDS122PW FAQ
1.How can I place an order for SN65LVDS122PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVDS122PW 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 SN65LVDS122PW reliable?
The price and inventory of SN65LVDS122PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVDS122PW is usually 5 days.
3.What payment methods are accepted for SN65LVDS122PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVDS122PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVDS122PW?
SN65LVDS122PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVDS122PW 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 SN65LVDS122PW?
For technical support, including SN65LVDS122PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVDS122PW requirements.
6.How does Aetrix verify that SN65LVDS122PW is sourced from the original manufacturer or authorized distributors?
All SN65LVDS122PW 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 SN65LVDS122PW meets industry standards.
7.What is the process for return or replacement of SN65LVDS122PW?
All SN65LVDS122PW units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVDS122PW, 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 SN65LVDS122PW part is unused and in its original packaging.
Return procedure for SN65LVDS122PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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