Overview
The NB3N3020DTR2G, produced by onsemi, is a high precision, low phase noise selectable clock multiplier. This device is designed to take a 5 – 27 MHz fundamental mode parallel resonant crystal or a 2 – 210 MHz LVCMOS single-ended clock source and generate differential LVPECL and single-ended LVCMOS/LVTTL clock outputs at a selectable clock output frequency. The output frequency is determined by three tri-level select inputs, allowing for 26 possible clock multipliers. The device is housed in a 5 mm x 4.4 mm narrow body TSSOP 16-pin package and operates within an industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Frequency Range (Crystal) | 5 – 27 | MHz |
| Input Frequency Range (Clock) | 2 – 210 | MHz |
| Output Clock Frequency | Up to 210 | MHz |
| Phase Noise at 125 MHz (25 MHz Input) | -95 dBc/Hz @ 100 Hz offset | |
| -107 dBc/Hz @ 1 kHz offset | ||
| -112 dBc/Hz @ 10 kHz offset | ||
| -117 dBc/Hz @ 100 kHz offset | ||
| -117 dBc/Hz @ 1 MHz offset | ||
| -134 dBc/Hz @ 10 MHz offset | ||
| RMS Period Jitter | 5 ps | |
| Operating Voltage | 3.3 V ±10% | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | TSSOP-16 (Pb-Free) |
Key Features
- Selectable Clock Multiplier: Allows for 26 possible clock multipliers using three tri-level select inputs.
- External Loop Filter Not Required: Simplifies the design and reduces component count.
- LVPECL Differential Output: Provides high-speed differential clock output.
- LVCMOS/LVTTL Outputs: Offers single-ended clock outputs compatible with LVCMOS and LVTTL logic levels.
- Low Phase Noise: Ensures high precision clock signals with minimal jitter.
- Output Enable: Allows for synchronous tri-stating of clock outputs to prevent glitches.
- Industrial Temperature Range: Operates reliably from -40°C to +85°C.
- Pb-Free Package: Compliant with environmental regulations.
Applications
- High-Speed Data Communication Systems: Suitable for applications requiring precise clock signals.
- Telecommunication Equipment: Ideal for clock multiplication in telecom infrastructure.
- Networking Devices: Used in routers, switches, and other network equipment.
- Embedded Systems: Applicable in various embedded systems requiring high-precision clock signals.
- Test and Measurement Equipment: Utilized in test equipment for generating stable clock signals.
Q & A
- What is the input frequency range for the NB3N3020?
The input frequency range is 5 – 27 MHz for crystal inputs and 2 – 210 MHz for clock inputs.
- How many possible clock multipliers does the NB3N3020 support?
The device supports 26 possible clock multipliers using three tri-level select inputs.
- What are the output types provided by the NB3N3020?
The device provides differential LVPECL and single-ended LVCMOS/LVTTL clock outputs.
- Does the NB3N3020 require an external loop filter?
No, the NB3N3020 does not require an external loop filter.
- What is the operating voltage range of the NB3N3020?
The operating voltage range is 3.3 V ±10%.
- What is the operating temperature range of the NB3N3020?
The operating temperature range is -40°C to +85°C.
- How does the output enable feature work on the NB3N3020?
The output enable inputs (OE1 and OE2) allow for synchronous tri-stating of the clock outputs to prevent glitches.
- What is the package type of the NB3N3020DTR2G?
The package type is TSSOP-16 (Pb-Free).
- What is the phase noise performance of the NB3N3020 at 125 MHz output frequency?
The phase noise performance is -95 dBc/Hz at 100 Hz offset, -107 dBc/Hz at 1 kHz offset, and so on, as specified in the datasheet.
- How long does it take for the PLL to stabilize after power-up?
The PLL takes 10 msec to stabilize and lock to the desired frequency after power-up.
