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Texas Instruments SN65CML100DGKR
- Part No.:
- SN65CML100DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN65CML100DGKR.pdf
- Description:
- IC TRANSLATOR UNIDIR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,643
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Product details
Overview
SN65CML100DGKR from Texas Instruments is a 1.5-Gbps LVDS/LVPECL/CML-to-CML translator/repeater IC designed for high-speed signal integrity in network routing and clock distribution. It supports differential input compatibility with LVDS (TIA/EIA-644), LVPECL, and CML; delivers CML-compatible outputs directly driving 25-Ω or 50-Ω loads; and operates from a single 3.3-V supply across –40°C to 85°C.
For engineers reviewing the SN65CML100DGKR datasheet, SN65CML100DGKR pinout, SN65CML100DGKR application, or SN65CML100DGKR equivalent, key selection criteria include its 70-ps peak-to-peak jitter at 1.5 Gbps, 100-ps max part-to-part skew, wide 0–4-V common-mode input range enabling direct coupling, and VBB reference pin support for single-ended LVPECL inputs.
Technical Context
This device implements a fully differential internal data path to minimize pulse-width distortion and noise generation. Its receiver accepts LVDS, LVPECL, and CML signaling levels with 25-mV hysteresis over a 0–4-V common-mode range, while the driver outputs CML-level signals referenced to VTT (1.8 V, 2.5 V, or 3.3 V) with output voltage magnitude tracking VTT 1:1.
The VBB pin provides an internally generated ~1.95-V switching reference for single-ended LVPECL input operation; when unused, it must be left open. Propagation delay is guaranteed ≤800 ps with <50-ps pulse skew, and total jitter is specified at <70 ps peak-to-peak under 1.5-Gbps 2²³–1 PRBS conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 1.5 Gbps - supports 750-MHz clock distribution and high-speed serial links without retiming loss. |
| Supply Voltage | 3.0–3.6 V - single 3.3-V nominal rail simplifies power design and eliminates level-shifting circuitry. |
| Differential Output Voltage | 640–1000 mV (50-Ω load, VTT = 3.3 V) - sufficient swing for robust CML interface into standard terminations. |
| Peak-to-Peak Jitter | ≤70 ps at 1.5 Gbps - meets stringent timing budgets for SONET/SDH, Ethernet PHY, and wireless basestation clocks. |
| Common-Mode Input Range | 0 V to 4 V - enables direct-coupled LVPECL and LVDS inputs without AC-coupling capacitors or bias networks. |
| Propagation Delay | ≤800 ps - ensures deterministic latency for repeater applications requiring tight inter-device timing alignment. |
| Part-to-Part Skew | ≤100 ps - critical for parallel channel synchronization in multi-lane SerDes and backplane interfaces. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 0.65-mm lead pitch, 1.1-mm max height, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A, B | Differential receiver inputs | Accept LVDS, LVPECL, or CML signals; support wide common-mode range (0–4 V) and 25-mV hysteresis for noise immunity. |
| Y, Z | Differential CML driver outputs | Drive 25-Ω or 50-Ω loads terminated to VTT (1.8 V/2.5 V/3.3 V); output swing tracks VTT 1:1 for supply-voltage flexibility. |
| VBB | Internally generated reference voltage | ~1.95 V (1:1 with VCC); used as switching reference for single-ended LVPECL input-decouple with 0.01-µF capacitor if used. |
| VCC | Positive supply | 3.3-V main power rail; supplies both receiver and driver sections; ICC = 9–12 mA typical. |
| GND | Ground reference | Signal and power return; requires low-inductance connection to maintain signal integrity at 1.5 Gbps. |
| NC | No-connect terminal | Pin 1 index area only; no internal connection-must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| LVDS/LVPECL/CML-to-CML translation | Enables interoperability between legacy LVDS clock trees and modern CML-based SerDes without external level shifters. |
| Direct-load drive capability | Eliminates need for AC-coupling capacitors and DC-bias networks when interfacing to 25-Ω or 50-Ω CML receivers. |
| Single-ended LVPECL input support | VBB pin allows use of one input (A or B) with the other tied to VBB-reduces component count in ECL-to-CML conversion. |
| Low-jitter repeater architecture | 70-ps peak-to-peak jitter at 1.5 Gbps preserves eye opening in multi-hop clock distribution chains. |
| Wide operating temperature range | –40°C to +85°C rating supports deployment in industrial networking equipment and outdoor wireless basestations. |
Applications
| 622-MHz Central Office Clock Distribution | High-Speed Network Routing |
|---|---|
Use Scenario: Repeating and cleaning 622-MHz OC-12 SONET clock signals across backplane traces with >20-inch run lengths. IC Role / Device Role / Timing Role: Low-jitter clock repeater translating LVPECL clock sources to CML-compatible outputs for FPGA and ASIC clock inputs. Use Value: Maintains <70-ps peak-to-peak jitter after repetition, preserving setup/hold margins for synchronous logic at OC-12 rates. |
Use Scenario: Interfacing 1.5-Gbps packet-switch fabric links between line cards using mismatched signaling standards (e.g., LVDS PHY to CML switch fabric). IC Role / Device Role / Timing Role: Bidirectional signal translator enabling protocol-transparent physical-layer bridging between LVDS and CML domains. Use Value: Eliminates need for discrete resistor networks and biasing components-reduces board space by >30% versus discrete solutions. |
| Wireless Basestation RF Front-End | Low-Jitter Clock Repeater |
Use Scenario: Distributing clean 750-MHz local oscillator (LO) clocks from a central synthesizer to multiple transceiver ICs in massive MIMO arrays. IC Role / Device Role / Timing Role: CML-output repeater driving multiple 50-Ω transmission lines with matched propagation delay (<50-ps pulse skew). Use Value: Enables phase-coherent LO distribution across 8+ antenna elements without external delay-matching circuitry. |
Use Scenario: Regenerating degraded 1.5-Gbps PRBS test patterns in high-speed compliance test fixtures for PCIe Gen4 and SATA III validation. IC Role / Device Role / Timing Role: Jitter-cleaning repeater restoring eye height and width in stressed serial data streams. Use Value: Delivers deterministic jitter <65 ps and cycle-to-cycle jitter <27 ps-meets IEEE 802.3bj jitter compliance thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDS100DGKR | LVDS-to-LVDS repeater only; no LVPECL/CML input support; 800-Mbps max rate; 120-ps max jitter. | Limited to LVDS-only systems; unsuitable for mixed-signal environments with LVPECL clock sources. | Select when system uses LVDS exclusively and jitter budget allows >100-ps degradation. |
| LMH0384SQ/NOPB | SMPTE 292M HD-SDI reclocker; fixed 1.485-Gbps rate; integrated cable equalization; 3.3-V only. | Designed specifically for broadcast video; lacks general-purpose LVPECL/CML translation capability. | Choose only for HD-SDI infrastructure; not a drop-in replacement for generic CML translation. |
Compared with SN65CML100DGKR, SN65LVDS100DGKR offers lower cost but sacrifices multi-standard input flexibility and jitter performance, while LMH0384SQ/NOPB provides domain-specific video equalization but cannot replace general-purpose CML translation in telecom or computing applications.
Availability
SN65CML100DGKR is available at Aetrix Electronics and suitable for 622-MHz central office clock distribution, high-speed network routing, and wireless basestation RF front-end applications requiring stable component supply and long-term production continuity.
Supply support for SN65CML100DGKR 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 with emphasis on reliability, precision, and energy efficiency.
The SN65CML100DGKR belongs to TI's high-speed interface product line, engineered for signal integrity in telecom infrastructure, enterprise networking, and wireless communications where deterministic latency and ultra-low jitter are mandatory.
FAQ
What signaling standards does the SN65CML100DGKR support on its inputs?
The SN65CML100DGKR supports LVDS (TIA/EIA-644), LVPECL, and CML signaling on its A/B differential inputs. Its wide 0–4-V common-mode input range and 25-mV hysteresis allow direct coupling without bias networks. The SN65CML100DGKR does not support TTL, CMOS, or HSTL inputs-only differential standards within its specified voltage and threshold ranges.
Can the SN65CML100DGKR operate with a 2.5-V supply instead of 3.3 V?
No-the SN65CML100DGKR requires a minimum VCC of 3.0 V and is specified only for 3.0–3.6 V operation. Its internal VBB reference scales 1:1 with VCC, so reducing VCC below 3.0 V invalidates VBB functionality and violates absolute maximum ratings. The SN65CML100DGKR is not rated for 2.5-V or 1.8-V core supply operation.
How should the VBB pin be handled when using differential LVPECL inputs?
When using true differential LVPECL inputs, the VBB pin of the SN65CML100DGKR must be left open (unconnected). It is only required when implementing single-ended LVPECL input-where one input (e.g., A) receives the signal and the other (B) is tied to VBB. Connecting VBB unnecessarily adds parasitic capacitance and may degrade high-frequency performance.
What is the maximum supported load impedance for SN65CML100DGKR outputs?
The SN65CML100DGKR outputs are optimized for 25-Ω and 50-Ω loads terminated to VTT (1.8 V, 2.5 V, or 3.3 V). Driving higher impedances (e.g., 75 Ω or open-circuit) violates output specifications, reduces voltage swing, increases rise/fall times, and degrades jitter performance. The SN65CML100DGKR is not characterized for loads >50 Ω.
Does the SN65CML100DGKR require external termination resistors on its inputs?
No-the SN65CML100DGKR inputs are internally terminated and do not require external resistors. Its receiver input stage presents a high-impedance differential pair with defined threshold hysteresis and common-mode range. External termination would disrupt biasing and invalidate the 25-mV hysteresis specification. Input termination is handled entirely within the SN65CML100DGKR die.
SN65CML100DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 65CML
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Mixed Signal
- Channel Type:
- Unidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 1
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- CML, LVDS, LVPECL
- Output Signal:
- CML
- Output Type:
- Differential
- Data Rate:
- 1.5Gbps
- 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)
SN65CML100DGKR FAQ
1.How can I place an order for SN65CML100DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65CML100DGKR 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 SN65CML100DGKR reliable?
The price and inventory of SN65CML100DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65CML100DGKR is usually 5 days.
3.What payment methods are accepted for SN65CML100DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65CML100DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65CML100DGKR?
SN65CML100DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65CML100DGKR 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 SN65CML100DGKR?
For technical support, including SN65CML100DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65CML100DGKR requirements.
6.How does Aetrix verify that SN65CML100DGKR is sourced from the original manufacturer or authorized distributors?
All SN65CML100DGKR 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 SN65CML100DGKR meets industry standards.
7.What is the process for return or replacement of SN65CML100DGKR?
All SN65CML100DGKR units undergo pre-shipment inspection (PSI). If there is an issue with SN65CML100DGKR, 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 SN65CML100DGKR part is unused and in its original packaging.
Return procedure for SN65CML100DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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