cdcv857b is a low-delay clock distributor from texas instruments that can distribute a single differential clock input to 10 differential clock outputs. the frequency range is 60mhz to 200mhz. the device supports spread spectrum clock, the static phase offset is ±50ps, the period jitter is ±35ps, and the device enters low-power mode when no clk input signal is applied or pwrdwn is low. the device is powered by dual 2.5v supplies and is packaged in a 48-pin tssop or 56-ball microstar juniorbga.
The CDCV857B is a high-performance, low-skew, low-jitter zero delay buffer designed to distribute a differential clock input pair to 10 differential pairs of clock outputs and one differential pair of feedback clock outputs. It operates from dual 2.5-V supplies and is compatible with spread spectrum clocking to reduce EMI. The device enters a low-power mode when the input frequency falls below a suggested detection frequency or when the PWRDWN pin is low.
| Operating Frequency | 60 MHz to 200 MHz |
|---|---|
| Supply Voltage | 2.5 V (nominal) |
| Quiescent Current | < 100 µA |
| Low Jitter (cycle-cycle) | ±50 ps |
| Low Static Phase Offset | ±50 ps |
| Output Distribution | 10 Differential Outputs |
Yes, the CDCV857B is able to track spread spectrum clocking for reduced EMI.
When PWRDWN is low, all outputs are disabled to a high-impedance state and the PLL is shut down to a low-power mode.