309RI

Specifications

Input Frequency 5 MHz to 50 MHz No. of Inputs 1 Temperature I 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


Description

SERIAL PROGRAMMABLE TRIPL
The 309RI is a versatile serially-programmable, triple PLL with spread spectrum clock source. The 309RI 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.

309RI 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