Overview
The NB7L72MMNGEVB is an evaluation board designed by ON Semiconductor to support the NB7L72M, a high-bandwidth, low-voltage, fully differential 2 x 2 crosspoint switch. This evaluation board is part of the QFN16EVB series, tailored for characterizing devices packaged in a 16-pin QFN package. It provides a flexible and convenient platform for quickly evaluating, characterizing, and verifying the operation of the NB7L72M device.
The board is designed with a high-bandwidth, controlled impedance environment, implemented in four layers. It includes features such as SMA connectors, power and ground connections, and provisions for adding bypass capacitors to reduce unwanted noise from power supplies.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Input Data Rate | > 10 Gb/s | |
| Maximum Input Clock Frequency | > 7 GHz | |
| Data Dependent Jitter | < 10 ps pk-pk | |
| Random Clock Jitter | < 0.5 ps RMS, Max | |
| Propagation Delay | 150 ps Typical | |
| Rise and Fall Times | 30 ps Typical | |
| Differential CML Outputs | 400 mV peak-to-peak, typical | |
| Operating Range | VCC = 2.375 V to 3.6 V with GND = 0 V | |
| Package Type | 16-pin QFN, 3mm x 3mm | |
| Operating Temperature Range | −40 to +85 °C | |
| Storage Temperature Range | −65 to +150 °C |
Key Features
- High-bandwidth, low-voltage, fully differential 2 x 2 crosspoint switch.
- Supports LVPECL, CML, or LVDS logic levels.
- Internal 50 Ω input termination resistors.
- Differential CML outputs with 400 mV peak-to-peak output swings when externally terminated with a 50 Ω resistor to VCC.
- Low skew and minimal jitter.
- Operating range: VCC = 2.375 V to 3.6 V with GND = 0 V.
- ESD protection: Human Body Model > 4 kV, Machine Model > 200 V.
Applications
The NB7L72M, supported by the NB7L72MMNGEVB evaluation board, is ideal for various high-speed applications including:
- SONET (Synchronous Optical Networking).
- GigE (Gigabit Ethernet).
- Fiber Channel.
- Backplane and other clock/data distribution applications.
Q & A
- What is the primary purpose of the NB7L72MMNGEVB evaluation board?
The primary purpose of the NB7L72MMNGEVB evaluation board is to provide a flexible and convenient platform for evaluating, characterizing, and verifying the operation of the NB7L72M device.
- What are the key features of the NB7L72M device?
The NB7L72M is a high-bandwidth, low-voltage, fully differential 2 x 2 crosspoint switch with CML outputs, supporting LVPECL, CML, or LVDS logic levels, and featuring internal 50 Ω input termination resistors.
- What are the typical applications of the NB7L72M device?
The NB7L72M is ideal for SONET, GigE, Fiber Channel, Backplane, and other clock/data distribution applications.
- What is the operating voltage range of the NB7L72M device?
The operating voltage range of the NB7L72M device is VCC = 2.375 V to 3.6 V with GND = 0 V.
- How should the power supplies be connected to the evaluation board?
The power supplies should be connected according to the specified configurations, ensuring that VCC, VEE/DUTGND, SMAGND, and ExPad are properly connected and bypass capacitors are added to reduce noise.
- What type of termination is required for CML outputs on the NB7L72M device?
CML outputs need to be terminated to VCC via a 50 Ω resistor. If no internal resistors are provided, 0402 chip resistor pads are available on the evaluation board for termination.
- What is the maximum input data rate supported by the NB7L72M device?
The NB7L72M device supports a maximum input data rate of > 10 Gb/s.
- What is the thermal resistance of the NB7L72M device in a QFN16 package?
The thermal resistance (Junction-to-Ambient) of the NB7L72M in a QFN16 package is 42 °C/W at 0 lfpm and 35 °C/W at 500 lfpm.
- How should the SMA connectors be used on the evaluation board?
The SMA connectors on the evaluation board are used for input and output signal connections. Ensure that the signal traces have equal electrical length and that appropriate termination resistors are used.
- What are the storage and operating temperature ranges for the NB7L72M device?
The operating temperature range is −40 to +85 °C, and the storage temperature range is −65 to +150 °C.
