Overview
The NB3L204K, produced by onsemi, is a differential 1:4 clock fanout buffer designed with High-speed Current Steering Logic (HCSL) outputs. This device is optimized for ultra-low phase noise, propagation delay variation, and low output-to-output skew, making it ideal for distributing low skew clocks across various applications. It operates with input signals from differential LVPECL, LVDS, and HCSL, and can also accept single-ended LVPECL, HCSL, LVCMOS, or LVTTL levels with a proper external Vth reference supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Maximum Input Clock Frequency | - | - | 350 | MHz |
| Supply Voltage Operation | 2.5 ±5% / 3.3 ±10% | - | - | V |
| Number of HCSL Outputs | - | - | 4 | - |
| Output-to-Output Skew | - | - | 100 ps | - |
| Propagation Delay | - | 1 ns | - | - |
| Rise and Fall Times | - | 500 ps | - | - |
| Additive RMS Phase Jitter | - | - | 80 fs | - |
| Ambient Operating Temperature | -40°C | - | 85°C | - |
| Package Type | - | - | QFN 24-pin, 4 mm x 4 mm | - |
Key Features
- DB400H compliant and PCIe Gen 3, Gen 4 compliant
- Individual OE control pin for each output
- Ultra-low phase noise and low output-to-output skew
- Accepts differential LVPECL, LVDS, and HCSL input signals
- Can accept single-ended LVPECL, HCSL, LVCMOS, or LVTTL levels with proper external Vth reference supply
- Pb-free and RoHS compliant
- Output drive current set by connecting a precision resistor from IREF to GND
- Outputs can interface to LVDS receivers when properly terminated
Applications
- PCI Express
- FBDIMM
- Mobile Computing
- Networking
- Gigabit Ethernet
Q & A
- What is the maximum input clock frequency of the NB3L204K?
The maximum input clock frequency is 350 MHz.
- What are the supported supply voltage operations for the NB3L204K?
The device operates with supply voltages of 2.5 V ±5% and 3.3 V ±10%.
- How many HCSL outputs does the NB3L204K have?
The NB3L204K has 4 HCSL outputs.
- What is the maximum output-to-output skew of the NB3L204K?
The maximum output-to-output skew is 100 ps.
- What is the typical propagation delay of the NB3L204K?
The typical propagation delay is 1 ns.
- What is the additive RMS phase jitter of the NB3L204K?
The additive RMS phase jitter is up to 80 fs.
- What is the ambient operating temperature range of the NB3L204K?
The ambient operating temperature range is -40°C to +85°C.
- What type of package does the NB3L204K come in?
The device comes in a QFN 24-pin package, 4 mm x 4 mm.
- Is the NB3L204K compliant with any specific standards?
Yes, it is DB400H compliant and PCIe Gen 3, Gen 4 compliant.
- Can the NB3L204K outputs interface with LVDS receivers?
Yes, the outputs can interface with LVDS receivers when properly terminated.
