Overview
The NB4N840MMNR4G, produced by onsemi, is a high-bandwidth fully differential dual 2 x 2 crosspoint switch. This device is designed with CML (Current Mode Logic) inputs and outputs, making it suitable for high-speed applications such as SDH/SONET, DWDM, Gigabit Ethernet, and high-speed switching. The fully differential design minimizes jitter accumulation, crosstalk, and signal skew, making it ideal for loop-through and protection channel switching applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Maximum Input Clock Frequency | - | 2.7 | - | GHz |
| Maximum Input Data Frequency | - | 3.2 | - | Gb/s |
| Propagation Delay | 140 | 225 | 340 | ps |
| Rise and Fall Times | 80 | 135 | - | ps |
| Channel to Channel Skew | 5 | - | 20 | ps |
| RMS Random Clock Jitter | 0.15 | 7 | - | ps |
| Peak-to-Peak Data Dependent Jitter | - | - | 20 | ps |
| Power Consumption | 130 | 170 | - | mA |
| Operating Temperature Range | -40 | - | 85 | °C |
| VCC Supply Voltage | 3.0 | - | 3.6 | V |
Key Features
- Plug-in compatible to the MAX3840 and SY55859L
- Internally terminated differential CML inputs and outputs with 50 Ω resistors
- Single-ended LVCMOS/LVTTL SEL inputs for signal routing control
- Configurable as 1:2 fan-out, repeater, or 2 x 2 crosspoint switch
- Low profile 5 x 5 mm 32-pin QFN package
- Power saving feature with disabled outputs
- CML output level with 400 mV peak-to-peak output swing
- Pb-free device
Applications
- SDH/SONET systems
- DWDM (Dense Wavelength Division Multiplexing) systems
- Gigabit Ethernet
- High-speed switching applications
- Loop-through and protection channel switching
Q & A
- What is the maximum input clock frequency of the NB4N840MMNR4G?
The maximum input clock frequency is 2.7 GHz.
- What is the maximum input data frequency of the NB4N840MMNR4G?
The maximum input data frequency is 3.2 Gb/s.
- What is the typical propagation delay of the NB4N840MMNR4G?
The typical propagation delay is 225 ps.
- What is the channel to channel skew of the NB4N840MMNR4G?
The channel to channel skew is typically 7 ps.
- What is the RMS random clock jitter of the NB4N840MMNR4G?
The RMS random clock jitter is typically 7 ps.
- What is the power consumption of the NB4N840MMNR4G with all outputs enabled?
The power consumption is typically 170 mA.
- What is the operating temperature range of the NB4N840MMNR4G?
The operating temperature range is from -40°C to +85°C.
- What type of package does the NB4N840MMNR4G come in?
The device is housed in a low profile 5 x 5 mm 32-pin QFN package.
- Is the NB4N840MMNR4G Pb-free?
Yes, the NB4N840MMNR4G is a Pb-free device.
- What are the typical output rise and fall times of the NB4N840MMNR4G?
The typical output rise and fall times are 80 ps.
