概要
説明
The IDT8V89317 is used to frequency synchronize equipment with an Ethernet connected reference or with a GPS based 1PPS reference; its integrated DCO (Digitally Controlled Oscillator) can be controlled by an external IEEE 1588 clock recovery servo to synthesize IEEE 1588-based clocks. The IDT8V89317 ultra-low jitter output clocks can be used to directly time 10 Gigabit Ethernet PHYs and QSGMII devices.
特長
- Digital PLL synchronizes with GPS or Ethernet connected synchronization sources
- DPLL bandwidth is selectable to be 15 mHz or 1.2 Hz
- DPLL holdover accuracy is 1.1X10-5 ppm
- Input references are monitored for frequency offset and activity; DPLL holdover, free run and hitless reference switching can be forced by the host processor or can be automatically controlled by an internal state machine
- Internal DCO has resolution of 0.01105 ppb and can be controlled by an external processor via I2C interface for IEEE 1588 clock generation
- Two Analog PLLs for jitter attenuation and frequency translation
- Jitter generation <0.3ps RMS (10 kHz to 20 MHz), meets jitter requirements of leading PHYs supporting 10GBASE-R, QSGMII and XAUI
- IN1, IN2 and IN3 accept single ended reference clocks whose frequencies can be 1PPS (1 Hz), 25 MHz, 125 MHz or 156.25 MHz
- OUT1 and OUT2 output differential clocks with frequencies of 125 MHz or 156.25 MHz
- OUT3 outputs a differential clock with frequency of 322.265625 MHz or 644.53125 MHz
- OUT4 outputs a free-running LVCMOS clock with frequency of 25 MHz
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Evaluation
8EBV89317
アクティブ
Evaluation Board 8EBV89317 for Industrial Automation and Power Systems - 10G Ethernet PLL and IEEE 1588 Synthesizer
The 8EBV89317 10G Ethernet PLL Evaluation board for Industrial Automation and Power Systems allows the user to connect up to three single ended reference inputs via SMA connectors. The reference inputs can operate at 1PPS (1Hz), 25MHz, 125MHz or 156.25MHz. Synchronization functions are provided...
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