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Texas Instruments SN65LVELT22DGK
- Part No.:
- SN65LVELT22DGK
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN65LVELT22DGK.pdf
- Description:
- IC TRANSLATOR UNIDIR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,337
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Product details
Overview
SN65LVELT22DGK 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 PECL output voltage levels (VOH = 2275–2420 mV, VOL = 1490–1680 mV) with built-in temperature compensation - used for high-speed clock/data transmission over backplanes.
For engineers reviewing the SN65LVELT22DGK datasheet, SN65LVELT22DGK pinout, SN65LVELT22DGK application, or SN65LVELT22DGK equivalent, key selection criteria include LVPECL output drive capability, TTL input compatibility, SOIC-8 vs. VSSOP-8 package trade-offs, thermal resistance (θJA = 213 °C/W for VSSOP), and drop-in compatibility with MC100LVELT22 in backplane timing systems.
Technical Context
The SN65LVELT22DGK implements two independent LVTTL-to-LVPECL translation channels, each with complementary differential outputs (Q0/Q0 and Q1/Q1) driven by a single-ended TTL input (D0/D1). It operates exclusively from a 3.0–3.8 V supply referenced to GND, with no negative rail required.
Its internal circuitry ensures default-high output state when inputs float, supports 1750 MHz max switching frequency at 300 mVpp amplitude, and maintains ≤50 ps device skew across temperature (–40°C to +85°C) via on-chip temperature compensation - critical for deterministic timing in synchronous backplane architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 3.8 V - enables direct interface with 3.3 V LVTTL logic without level-shifting circuitry |
| Propagation Delay | 200–550 ps - ensures sub-nanosecond timing alignment for high-frequency clock distribution |
| Output Skew | <50 ps max - guarantees tight phase matching between Q0/Q1 differential pairs for jitter-sensitive applications |
| LVPECL Output Levels | VOH = 2275–2420 mV, VOL = 1490–1680 mV (into 50 Ω to VCC–2 V) - meets standard LVPECL termination requirements |
| Max Switching Frequency | 1750 MHz at 300 mVpp - supports PCIe Gen1/Gen2 reference clocks and high-speed serial data links |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and telecom infrastructure environments |
| Power Supply Current | 23–33 mA - enables low-power operation while maintaining full-speed LVPECL drive strength |
Pinout & Package
VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 1.1 mm max height, 0.65 mm lead pitch, exposed pad optional per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D0) | LVTTL Input | Single-ended TTL-compatible signal input for first channel; floats high by default |
| 2 (D1) | LVTTL Input | Single-ended TTL-compatible signal input for second channel; floats high by default |
| 3 (Q0) | LVPECL Output (+) | Differential positive output for channel 0; requires 50 Ω termination to VCC – 2 V |
| 4 (Q0) | LVPECL Output (–) | Differential negative output for channel 0; complements Q0 for noise rejection |
| 5 (GND) | Ground Reference | Primary return path for all internal circuitry and output current sinks |
| 6 (Q1) | LVPECL Output (+) | Differential positive output for channel 1; independently controlled from D1 |
| 7 (Q1) | LVPECL Output (–) | Differential negative output for channel 1; complements Q1 for common-mode noise immunity |
| 8 (VCC) | Positive Supply | 3.0–3.8 V power rail; supplies both input buffers and differential output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in MC100LVELT22 replacement | Pin-compatible and functionally identical to MC100LVELT22, enabling legacy design upgrades without PCB changes |
| Built-in temperature compensation | Maintains stable output skew and DC levels across –40°C to +85°C, eliminating external calibration |
| Default-high output on floating inputs | Prevents undefined states during power-up or unconnected traces, reducing system initialization risk |
| Low-jitter performance | 0.5–1.0 ps RMS random clock jitter - preserves signal integrity in high-speed serial timing paths |
| Backplane-optimized signaling | Designed specifically for point-to-point or multi-drop backplane interconnects with controlled impedance routing |
Applications
| Telecom Line Cards | PCIe Gen1 Clock Distribution |
|---|---|
|
Use Scenario: Transmitting synchronized clock signals across backplane traces between control and line interface modules. IC Role / Device Role / Timing Role: Dual-channel LVTTL-to-LVPECL translator providing matched-delay differential clocks to multiple ASICs. Use Value: Sub-50 ps skew ensures deterministic setup/hold margins for 100 MHz–2.5 GHz reference clocks in carrier-grade equipment. |
Use Scenario: Converting motherboard LVTTL clock sources into LVPECL-compatible signals for PCIe root complex and endpoint devices. IC Role / Device Role / Timing Role: Timing bridge translating 100 MHz system clocks into differential LVPECL for low-noise PCIe lane synchronization. Use Value: 450 ps typical propagation delay and 1750 MHz bandwidth support Gen1/Gen2 compliance without added latency. |
| Industrial PLC Backplanes | Test Equipment Signal Generation |
|
Use Scenario: Distributing real-time control clocks across modular I/O chassis with long parallel bus runs. IC Role / Device Role / Timing Role: Robust level shifter converting microcontroller LVTTL clocks into noise-immune LVPECL for deterministic scan-cycle timing. Use Value: –40°C to +85°C rating and built-in temperature compensation ensure timing stability in factory-floor environments. |
Use Scenario: Generating precise differential clock stimuli for high-speed digital pattern generators and BERT systems. IC Role / Device Role / Timing Role: Low-jitter translator driving LVPECL inputs of sampling oscilloscopes and logic analyzers. Use Value: 0.5 ps RMS jitter and <50 ps skew preserve edge fidelity for sub-picosecond measurement accuracy. |
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 | Identical pinout, same electrical specs, but obsolete and no longer in production by ON Semiconductor | Legacy designs requiring exact form-fit-function replacement; no new design-in recommended | SN65LVELT22DGK is TI's direct drop-in replacement with active production and extended lifecycle support |
| SN65ELT22D | Same core functionality but lacks temperature compensation; higher skew drift over temperature (±10 ps/°C vs. compensated) | Suitable for cost-sensitive, ambient-controlled environments where thermal stability is less critical | Choose SN65LVELT22DGK when operating across industrial temperature range with minimal skew variation |
Compared with MC100LVELT22 and SN65ELT22D, the SN65LVELT22DGK uniquely combines drop-in compatibility, active temperature compensation, and VSSOP-8 space savings - making it optimal for new industrial and telecom designs requiring guaranteed skew stability and compact footprint.
Availability
SN65LVELT22DGK is available at Aetrix Electronics and suitable for telecom line cards, PCIe clock distribution, industrial PLC backplanes, test equipment signal generation, and high-speed data acquisition systems requiring stable component supply and long-term obsolescence management.
Supply support for SN65LVELT22DGK 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 expertise in high-speed interface and timing solutions.
The SN65LVELT22DGK belongs to TI's high-speed logic translator product line, engineered specifically for robust signal integrity in backplane and board-level clock/data distribution applications demanding LVPECL compatibility and industrial temperature resilience.
FAQ
What is the supply voltage range for the SN65LVELT22DGK?
The SN65LVELT22DGK operates from a single 3.0 V to 3.8 V supply referenced to GND. It does not require negative rails or split supplies. This range accommodates standard 3.3 V LVTTL logic interfaces while allowing ±0.15 V tolerance on VCC, ensuring reliable operation across manufacturing and temperature variations. The SN65LVELT22DGK draws 23–33 mA under typical conditions.
Does the SN65LVELT22DGK support hot-swap or input floating conditions?
Yes - the SN65LVELT22DGK drives its LVPECL outputs high when D0 or D1 inputs are left floating or unconnected. This default-high behavior prevents undefined states during power sequencing or unused channel configurations. The SN65LVELT22DGK achieves this via internal pull-up structures compatible with standard LVTTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V).
How is LVPECL output termination implemented for the SN65LVELT22DGK?
The SN65LVELT22DGK requires external 50 Ω resistors from each differential output (Q0, Q0, Q1, Q1) to VCC – 2.0 V, as specified in TI's SLLS928 datasheet. This termination establishes the proper common-mode voltage (~1.3 V) and differential swing (~700 mVpp) needed for LVPECL receivers. The SN65LVELT22DGK does not integrate termination resistors and relies on board-level implementation for signal integrity.
Is the SN65LVELT22DGK pin-compatible with the MC100LVELT22?
Yes - the SN65LVELT22DGK is explicitly designed as a drop-in replacement for the MC100LVELT22, sharing identical pin assignment, electrical specifications, and functional behavior. TI confirms this compatibility in the datasheet's "Drop in Compatible to MC100LVELT22" feature statement. The SN65LVELT22DGK retains the same SOIC-8 and VSSOP-8 package options as the legacy part.
What thermal performance can be expected from the SN65LVELT22DGK in VSSOP-8 package?
In its VSSOP-8 (DGK) package, the SN65LVELT22DGK has a junction-to-ambient thermal resistance (θJA) of 213 °C/W under low-K board conditions and 189 °C/W under high-K conditions. Its junction-to-board (θJB) is 120 °C/W and junction-to-case (θJC) is 74 °C/W. These values enable reliable operation up to +85°C ambient when mounted on standard FR-4 with adequate copper pour, as confirmed in TI's PACKAGE MATERIALS INFORMATION documentation.
SN65LVELT22DGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65LVELT
- Package/Case:
- Packaging:
- Bulk
- 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-TSSOP, 8-MSOP (0.118", 3.00mm Width)
SN65LVELT22DGK FAQ
1.How can I place an order for SN65LVELT22DGK through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65LVELT22DGK 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 SN65LVELT22DGK reliable?
The price and inventory of SN65LVELT22DGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65LVELT22DGK is usually 5 days.
3.What payment methods are accepted for SN65LVELT22DGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65LVELT22DGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65LVELT22DGK?
SN65LVELT22DGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65LVELT22DGK 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 SN65LVELT22DGK?
For technical support, including SN65LVELT22DGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65LVELT22DGK requirements.
6.How does Aetrix verify that SN65LVELT22DGK is sourced from the original manufacturer or authorized distributors?
All SN65LVELT22DGK 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 SN65LVELT22DGK meets industry standards.
7.What is the process for return or replacement of SN65LVELT22DGK?
All SN65LVELT22DGK units undergo pre-shipment inspection (PSI). If there is an issue with SN65LVELT22DGK, 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 SN65LVELT22DGK part is unused and in its original packaging.
Return procedure for SN65LVELT22DGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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