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Texas Instruments SN65LVELT22DR
- Part No.:
- SN65LVELT22DR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN65LVELT22DR.pdf
- Description:
- IC TRANSLTR UNIDIRECTIONAL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:431
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Product details
Overview
SN65LVELT22DR from Texas Instruments is a dual LVTTL-to-differential-LVPECL translator IC operating at 3.3 V supply, delivering 450 ps typical propagation delay, <50 ps max output-to-output skew, and full operation across –40°C to +85°C. It serves as a high-speed level-shifting buffer for clock/data transmission over backplanes in telecom and datacom systems.
For engineers reviewing the SN65LVELT22DR datasheet, SN65LVELT22DR pinout, SN65LVELT22DR application, or SN65LVELT22DR equivalent, key selection criteria include its SOIC-8 package compatibility, 1750 MHz max switching frequency, differential PECL output drive capability, and drop-in functional equivalence to MC100LVELT22 in LVTTL-to-LVPECL translation roles.
Technical Context
The SN65LVELT22DR implements two independent LVTTL-input-to-LVPECL-output translation channels with built-in temperature compensation and default-high outputs when inputs are floating. Each channel supports true differential PECL outputs (Q0/Q0 and Q1/Q1) terminated to VCC – 2.0 V via 50-Ω resistors.
It operates exclusively from a single 3.0 V to 3.8 V supply referenced to GND, with TTL input thresholds fixed at VIH = 2.0 V and VIL = 0.8 V, and PECL output voltage levels specified as VOH = 2275–2420 mV and VOL = 1490–1680 mV under 50-Ω termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 3.8 V - Enables direct interface with 3.3 V LVTTL logic without level-shifter circuitry |
| Propagation Delay | 425 ps typ - Supports sub-nanosecond timing alignment critical for high-speed backplane clock distribution |
| Output Skew | <50 ps max - Ensures matched timing between Q0/Q0 and Q1/Q1 pairs for synchronous multi-channel systems |
| Max Switching Frequency | 1750 MHz - Validates use in OC-48/STM-16 and 10 GbE reference clock paths |
| Operating Temperature | –40°C to +85°C - Qualified for industrial and telecom infrastructure environments |
| Input Clamp Voltage | –1.2 V - Protects against negative transients during hot-plug or ESD events on LVTTL inputs |
| Power Supply Current | 26–33 mA - Enables predictable thermal budgeting in dense PCB layouts |
Pinout & Package
SN65LVELT22DR is housed in an industry-standard SOIC-8 (D) package, 3.91 mm wide × 4.90 mm long × 1.75 mm height, with NiPdAu lead finish and moisture sensitivity level 1 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D0) | LVTTL Input | Accepts standard 3.3 V LVTTL logic; high-impedance when unused, defaults to high output |
| 2 (D1) | LVTTL Input | Independent second LVTTL input channel; electrically isolated from D0 path |
| 3 (Q0) | LVPECL Output (+) | Differential positive output for channel 0; requires 50 Ω termination to VCC – 2.0 V |
| 4 (Q0) | LVPECL Output (–) | Differential complementary output for channel 0; defines LVPECL common-mode voltage |
| 5 (GND) | Ground Reference | Single ground plane connection for both input and output stages; no separate analog/digital split |
| 6 (Q1) | LVPECL Output (+) | Positive differential output for channel 1; independently buffered from Q0/Q0 |
| 7 (Q1) | LVPECL Output (–) | Complementary output for channel 1; maintains matched skew with Q1 |
| 8 (VCC) | Positive Supply | Single 3.3 V supply rail powering both translation channels; no auxiliary bias required |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in MC100LVELT22 replacement | Identical pinout, function, and AC/DC specs enable legacy design migration without layout change |
| Built-in temperature compensation | Maintains stable output voltage swing and skew across –40°C to +85°C ambient range |
| Default-high output behavior | Prevents undefined states during power-up or floating inputs-no external pull-ups needed |
| Low output-to-output skew | <50 ps ensures deterministic phase alignment between dual LVPECL outputs for clock fanout |
| Backplane-optimized propagation delay | 450 ps typ enables sub-2 ns round-trip timing margins in 12-inch FR4 backplane traces |
Applications
| Telecom Line Cards | Data Center Backplanes |
|---|---|
|
Use Scenario: Clock distribution from central timing module to multiple SERDES PHYs on a line card. IC Role / Device Role / Timing Role: Dual-channel LVTTL-to-LVPECL translator providing low-skew, terminated clock signals to eight or more downstream devices. Use Value: Eliminates need for discrete resistor networks and active repeaters while maintaining <50 ps inter-channel skew across temperature. |
Use Scenario: Synchronizing distributed switch fabric ASICs across a 16-slot chassis backplane. IC Role / Device Role / Timing Role: Level-shifting and buffering of 156.25 MHz reference clocks from controller to slot-level timing receivers. Use Value: 450 ps propagation delay and 1750 MHz bandwidth support OC-192/STM-64 timing integrity over 30 cm trace lengths. |
| Optical Transport Equipment | High-Speed Test Instrumentation |
|
Use Scenario: Driving LVPECL inputs of CDR and mux/demux ICs in DWDM line systems. IC Role / Device Role / Timing Role: Translating FPGA-generated LVTTL control clocks into robust differential LVPECL for jitter-sensitive optical modules. Use Value: 0.5–1.0 ps RMS random jitter preserves BER performance in 10 Gb/s+ serial links. |
Use Scenario: Generating precise differential clock stimuli for ATE testing of high-speed ADCs and DACs. IC Role / Device Role / Timing Role: Converting pattern generator LVTTL outputs into clean, terminated LVPECL waveforms with matched edge rates. Use Value: 300–500 ps rise/fall times and <50 ps skew enable accurate setup/hold margin validation at 1.5 GHz sampling rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVTTL-to-LVPECL translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC100LVELT22 | Pin-compatible, identical AC/DC specs, but obsolete and not recommended for new designs per ON Semiconductor lifecycle notice | Same backplane clock fanout use case; however, long-term supply continuity is not assured | Select SN65LVELT22DR for guaranteed production availability and TI's 10-year longevity commitment |
| SN65ELT22D | Same die, but rated only for 3.0–3.6 V supply (vs. SN65LVELT22DR's 3.0–3.8 V), and lacks explicit drop-in claim vs. MC100LVELT22 | Suitable for lower-voltage 3.3 V systems where margin to 3.8 V is unnecessary; not validated for MC100LVELT22 replacement | Choose SN65LVELT22DR when interfacing with legacy MC100LVELT22-based schematics or requiring extended VCC headroom |
Compared with MC100LVELT22 and SN65ELT22D, the SN65LVELT22DR provides verified drop-in compatibility with the legacy part while extending supply voltage range and guaranteeing long-term sourcing-making it the optimal choice for redesigns and new deployments requiring field-proven timing integrity.
Availability
SN65LVELT22DR is available at Aetrix Electronics and suitable for telecom line cards, data center backplanes, optical transport equipment, and high-speed test instrumentation requiring stable component supply, consistent parametric performance, and long-lifecycle assurance.
Supply support for SN65LVELT22DR 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-performance signal chain technologies, with decades of expertise in timing, interface, and high-speed logic solutions.
The SN65LVELT22DR belongs to TI's high-speed translator product line, engineered specifically for reliable LVTTL-to-LVPECL conversion in mission-critical telecom and datacom infrastructure where timing precision, skew control, and thermal stability are non-negotiable.
FAQ
What is the maximum operating supply voltage for SN65LVELT22DR?
The SN65LVELT22DR supports a maximum supply voltage of 3.8 V, with guaranteed operation across 3.0 V to 3.8 V at GND = 0 V. This extended upper limit provides margin over nominal 3.3 V rails and accommodates transient overshoot in noisy power environments-unlike the SN65ELT22D, which is limited to 3.6 V max.
Does SN65LVELT22DR require external termination resistors?
Yes, the SN65LVELT22DR requires 50 Ω termination resistors from each LVPECL output (Q0, Q0, Q1, Q1) to VCC – 2.0 V, as specified in the datasheet Figure 1. This termination establishes the correct common-mode voltage (~1.3 V) and differential swing (~800 mVpp) essential for signal integrity in LVPECL interfaces.
Is SN65LVELT22DR pin-compatible with MC100LVELT22?
Yes, SN65LVELT22DR is explicitly documented as drop-in compatible with MC100LVELT22, sharing identical SOIC-8 pinout, DC/AC specifications, and functional behavior-including default-high outputs and temperature-compensated skew performance-enabling direct replacement without PCB modification.
What is the thermal resistance (θJA) of SN65LVELT22DR in SOIC-8 package?
The SN65LVELT22DR in SOIC-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 719 °C/W under low-K board conditions and 840 °C/W under high-K board conditions, per TI's Power Dissipation Ratings table. These values inform thermal design for continuous operation at up to 33 mA supply current across –40°C to +85°C.
Can SN65LVELT22DR drive unterminated LVDS inputs?
No, SN65LVELT22DR is designed exclusively for LVPECL/ECL signaling and must be terminated to VCC – 2.0 V. Its output voltage levels (VOH ≈ 2.3 V, VOL ≈ 1.5 V) and current-drive architecture are incompatible with LVDS requirements (±350 mV differential, 1.2 V common-mode); using it with unterminated LVDS inputs risks signal distortion and receiver malfunction.
SN65LVELT22DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVELT
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Mixed Signal
- Channel Type:
- Unidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVTTL
- Output Signal:
- LVPECL
- Output Type:
- Differential
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC (0.154", 3.90mm Width)
SN65LVELT22DR FAQ
1.How can I place an order for SN65LVELT22DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVELT22DR 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 SN65LVELT22DR reliable?
The price and inventory of SN65LVELT22DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVELT22DR is usually 5 days.
3.What payment methods are accepted for SN65LVELT22DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVELT22DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVELT22DR?
SN65LVELT22DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVELT22DR 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 SN65LVELT22DR?
For technical support, including SN65LVELT22DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVELT22DR requirements.
6.How does Aetrix verify that SN65LVELT22DR is sourced from the original manufacturer or authorized distributors?
All SN65LVELT22DR 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 SN65LVELT22DR meets industry standards.
7.What is the process for return or replacement of SN65LVELT22DR?
All SN65LVELT22DR units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVELT22DR, 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 SN65LVELT22DR part is unused and in its original packaging.
Return procedure for SN65LVELT22DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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