Specifications | Input Frequency | 5 MHz to 50 MHz |
| No. of Inputs | 1 |
| Temperature | C |
| Output Frequency | 250 kHz to 200 MHz |
| Input Type | Clock,Crystal |
| No. of Outputs | 9 |
| Output Type | LVCMOS |
| Voltage | 3.3 V |
| Package | QSOP 20 |
| Speed | NA |
| Spread Type | Down,Center |
| Core Supply Voltage (VDD) | 3.3 V |
| Output Supply Voltage (VDDO) | 3.3 V |
| Peak-to-Peak Period Jitter | ± 300 ps Pk-to-Pk |
DescriptionSERIAL PROGRAMMABLE TRIPL
The 309RT is a versatile serially-programmable, triple PLL with spread spectrum clock source. The 309RT can generate any frequency from 250kHz to 200 MHz, and up to 6 different output frequencies simultaneously.
The outputs can be reprogrammed on-the-fly, and will lock to a new frequency in 10 ms or less. To reduce system EMI emissions, spread spectrum is available that supports modulation frequencies of 31 kHz and 120 kHz, as well as modulation amplitudes of ±0.25% to ±2.0%. Both center and down-spreadoptions are available.
The 309RT includes a PDTS pin which tri-states the output clocks and powers down the entire chip. The ICS309 default for non-programmed start-up are buffered reference clock outputs on all clock output pins.
IDT's VersaClock? programming software allows the user to configure up to 9 outputs with target frequencies, spread spectrum capabilities or buffered reference clock outputs. The VersaClock? software automatically configures the PLLs for optimal overall performance.
Packaged in 20-pin SSOP (QSOP)
Available in Pb (lead) free package
Highly accurate frequency generation
M/N Multiplier PLL: M = 1..2048, N = 1..1024
Serially programmable: user determines the output frequency via a 3-wire interface
Spread Spectrum frequency modulation for reduced system EMI
Center or Down Spread up to 4% total
Selectable 32 kHz and 120 kHz modulation
Eliminates need for custom quartz oscillators
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 3 - 50 MHz
Output clock frequencies up to 200 MHz
Operating voltage of 3.3 V
Up to 9 reference clock outputs
Power down tri-state mode
Very low jitter
click here for VersaClock Software page
309RT Data Sheet
