Overview
The NB3H83905CDTR2G, produced by onsemi, is a versatile clock fanout buffer designed to operate with a wide range of voltage supplies. This device is capable of accepting a fundamental parallel resonant crystal input from 3 MHz to 40 MHz or a single-ended LVCMOS clock input up to 100 MHz. It features six LVTTL/LVCMOS output clocks, making it suitable for various clock distribution applications. The device is available in multiple package options, including SOIC-16, TSSOP-16, and QFN-20, ensuring flexibility in design and implementation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD (Core Supply Voltage) | 1.6 | - | 4.6 | V |
| VDDO (Output Supply Voltage) | 1.6 | - | 4.6 | V |
| Input Frequency (Crystal) | 3 | - | 40 | MHz |
| Input Frequency (Clock) | - | - | 100 | MHz |
| Output to Output Skew | - | - | 80 | ps |
| Operating Temperature Range | -40 | - | 85 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| ESD Protection (Human Body Model) | - | - | 2000 | V |
| ESD Protection (Machine Model) | - | - | 200 | V |
Key Features
- Six copies of LVTTL/LVCMOS output clocks
- Flexible supply operation: VDD and VDDO can be 1.8 V, 2.5 V, or 3.3 V
- Crystal oscillator interface supporting frequencies from 3 MHz to 40 MHz
- LVCMOS compatible enable inputs with 5 V tolerance
- Low output to output skew: 80 ps max
- Synchronous output enable to prevent output glitching
- Phase noise floor of -160 dBc (1 MHz)
- Industrial temperature range: -40°C to +85°C
- Fit, form, and function compatible with ICS83905 and PI6C10806
Applications
The NB3H83905CDTR2G is suitable for a variety of applications requiring precise clock distribution, including:
- Telecommunications equipment
- Data communication systems
- Networking devices
- Embedded systems
- High-speed computing and storage systems
Q & A
- What are the supported input frequencies for the NB3H83905CDTR2G?
The device supports crystal input frequencies from 3 MHz to 40 MHz and single-ended LVCMOS clock inputs up to 100 MHz.
- What are the possible supply voltages for the NB3H83905CDTR2G?
The device can operate with core and output supply voltages of 1.8 V, 2.5 V, or 3.3 V.
- How many output clocks does the NB3H83905CDTR2G provide?
The device provides six LVTTL/LVCMOS output clocks.
- What is the maximum output to output skew of the NB3H83905CDTR2G?
The maximum output to output skew is 80 ps.
- How do the enable inputs function on the NB3H83905CDTR2G?
The enable inputs are LVCMOS compatible and synchronous, allowing for the enable or disable of outputs without causing glitches or runt pulses.
- What is the phase noise performance of the NB3H83905CDTR2G?
The phase noise floor is -160 dBc at 1 MHz offset.
- What are the recommended crystal parameters for the NB3H83905CDTR2G?
The recommended crystal parameters include a fundamental AT-cut crystal with a frequency range of 10 to 40 MHz, load capacitance of 16-20 pF, and equivalent series resistance of 50 Ω max.
- How should unused input and output pins be handled on the NB3H83905CDTR2G?
Unused LVCMOS control pins have internal pull-ups or pull-downs and do not require additional external resistors. Unused LVCMOS outputs can be left floating.
- What is the operating temperature range of the NB3H83905CDTR2G?
The operating temperature range is -40°C to +85°C.
- What are the ESD protection ratings for the NB3H83905CDTR2G?
The device has ESD protection ratings of > 2 kV for the Human Body Model and > 200 V for the Machine Model.
