Overview
The NB3H83905C, produced by onsemi, is a versatile clock fanout buffer designed to operate with a wide range of voltage supplies. This device supports 1.8 V, 2.5 V, or 3.3 V core and output voltages, making it highly flexible for various applications. It accepts a fundamental parallel resonant crystal input from 3 MHz to 40 MHz or a single-ended LVCMOS clock input up to 100 MHz. The device features six LVTTL/LVCMOS output clocks and includes synchronous enable controls to manage output states effectively.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VDD (Core Voltage) | 1.6 | - | 4.6 | V |
| VDDO (Output 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 |
| Core Quiescent Power Supply Current (ENABLEx = LOW) | - | - | 10 | mA |
| Output Quiescent Power Supply Current (ENABLEx = LOW) | - | - | 5 | mA |
Key Features
- Six copies of LVTTL/LVCMOS output clocks
- Flexible core and output voltage supplies: 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
- Synchronous output enable control to prevent output glitching
- Low output to output skew: 80 ps max
- 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 NB3H83905C is suitable for a variety of applications requiring precise clock distribution and flexible voltage operation. These include:
- Telecommunication systems
- Data communication equipment
- Networking devices
- Embedded systems requiring multiple clock outputs
- Industrial control systems
Q & A
- What are the supported core and output voltages for the NB3H83905C?
The device supports 1.8 V, 2.5 V, or 3.3 V for both core and output voltages.
- What is the frequency range for the crystal input?
The crystal input frequency range is from 3 MHz to 40 MHz.
- What is the maximum frequency for the LVCMOS clock input?
The maximum frequency for the LVCMOS clock input is up to 100 MHz.
- How many output clocks does the NB3H83905C provide?
The device provides six LVTTL/LVCMOS output clocks.
- What is the output to output skew of the NB3H83905C?
The output to output skew is 80 ps maximum.
- How do the enable inputs control the output clocks?
The enable inputs (ENABLE1 and ENABLE2) synchronously enable or disable the output clocks, preventing potential output glitching or runt pulse generation.
- What is the phase noise performance of the NB3H83905C?
The phase noise floor is -160 dBc (1 MHz).
- What is the operating temperature range of the NB3H83905C?
The operating temperature range is -40°C to +85°C.
- Is the NB3H83905C compatible with other devices?
Yes, it is fit, form, and function compatible with ICS83905 and PI6C10806.
- How are the outputs terminated in the NB3H83905C?
The outputs can be series terminated with a 28 Ω resistor or Thevenin parallel terminated with 100 Ω pull-up and pull-down resistors.
