Overview
The NB6L11M, produced by onsemi, is a 2.5 V / 3.3 V differential 1:2 CML (Current Mode Logic) fanout buffer. This device is part of the ECLinPS MAX family of high-performance clock products. It is designed to distribute high-speed clock signals with minimal jitter and skew, making it suitable for various high-frequency applications. The NB6L11M features internal 50 Ω termination resistors and supports multiple input logic levels including LVPECL, LVCMOS, LVTTL, CML, and LVDS. The device is housed in a compact 3x3 mm 16-pin QFN package, enhancing thermal performance through its exposed pad connected to the die.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Maximum Input Clock Frequency | - | > 4 GHz | - | GHz |
| Propagation Delay (D to Q) | 175 | 225 | 325 | ps |
| Rise and Fall Times | - | 70 | - | ps |
| RMS Clock Jitter | - | 0.5 | - | ps |
| Output Voltage Amplitude (CML) | - | 380 | - | mV |
| Power Supply Voltage (VCC) | 2.375 | - | 3.63 | V |
| Power Supply Voltage (VEE) | -2.375 | - | -3.63 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Internal Input Termination Resistors | 40 | 50 | 60 | Ω |
Key Features
- Differential 1:2 CML fanout buffer with internal 50 Ω termination resistors.
- Supports multiple input logic levels: LVPECL, LVCMOS, LVTTL, CML, and LVDS.
- Maximum input clock frequency greater than 4 GHz.
- Typical propagation delay of 225 ps and rise/fall times of 70 ps.
- Low RMS clock jitter of 0.5 ps maximum.
- Differential CML outputs with 380 mV peak-to-peak amplitude.
- VREFAC reference output for single-ended or capacitor-coupled inputs.
- Functionally compatible with existing 2.5 V / 3.3 V devices.
- Operating temperature range from -40°C to +85°C.
- Pb-free and housed in a 3x3 mm 16-pin QFN package.
Applications
The NB6L11M is suitable for a variety of high-speed applications, including:
- High-frequency clock distribution in telecommunications and networking equipment.
- Data communication systems requiring low jitter and skew.
- High-speed data acquisition and processing systems.
- Test and measurement equipment.
- High-performance computing and server systems.
Q & A
- What is the maximum input clock frequency of the NB6L11M?
The maximum input clock frequency of the NB6L11M is greater than 4 GHz.
- What are the typical rise and fall times of the NB6L11M?
The typical rise and fall times of the NB6L11M are 70 ps.
- What is the RMS clock jitter of the NB6L11M?
The RMS clock jitter of the NB6L11M is 0.5 ps maximum.
- What types of input logic levels does the NB6L11M support?
The NB6L11M supports LVPECL, LVCMOS, LVTTL, CML, and LVDS input logic levels.
- What is the purpose of the VREFAC pin on the NB6L11M?
The VREFAC pin provides a reference voltage for single-ended or capacitor-coupled inputs.
- What is the operating temperature range of the NB6L11M?
The operating temperature range of the NB6L11M is from -40°C to +85°C.
- What is the package type and size of the NB6L11M?
The NB6L11M is housed in a 3x3 mm 16-pin QFN package.
- Is the NB6L11M Pb-free?
Yes, the NB6L11M is Pb-free.
- What are the internal input termination resistors of the NB6L11M?
The internal input termination resistors of the NB6L11M are 50 Ω.
- How should the exposed pad on the QFN package be connected?
The exposed pad on the QFN package should be thermally connected to the die and electrically connected to VEE on the PCB.
