The CDCE937 and CDCEL937 devices are modular PLL-based low cost, high-performance, programmable clock synthesizers, multipliers and dividers. They generate up to 7 output clocks from a single input frequency. Each output can be programmed in-system for any clock frequency up to 230 MHz, using up to three independent configurable PLLs.
The CDCEx937 has separate output supply pins, VDDOUT, which is 1.8 V for CDCEL937 and to 2.5 V to 3.3 V for CDCE937.
The input accepts an external crystal or LVCMOS clock signal. If an external crystal is used, an on-chip load capacitor is adequate for most applications. The value of the load capacitor is programmable from 0 to 20 pF. Additionally, an on-chip VCXO is selectable which allows synchronization of the output frequency to an external control signal, that is, PWM signal.
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| Function | Clock synthesizer |
| Number of outputs | 7 |
| Output frequency (max) (MHz) | 230 |
| Core supply voltage (V) | 1.8 |
| Output supply voltage (V) | 1.8 |
| Input type | LVCMOS, XTAL |
| Output type | LVCMOS |
| Operating temperature range (°C) | -40 to 85 |
| Features | Integrated EEPROM, Multiplier or divider, Spread-spectrum clocking (SSC) |
| Rating | Catalog |
| TSSOP (PW) | 20 | 41.6 mm² 6.5 x 6.4 |