Industry's Most Accurate All-Silicon Oscillator
DescriptionThe DS1077L is a dual-output, programmable, fixed-frequency oscillator requiring no external components for operation. The DS1077L can be used as a processor-controlled frequency synthesizer or as a stand-alone oscillator. The two synchronous output operating frequencies are user-adjustable in submultiples of the master frequency through the use of two on-chip programmable prescalers and dividers. The specific output frequencies chosen are stored in nonvolatile (EEPROM) memory. The DS1077L defaults to these values upon power-up.
The DS1077L features a 2-wire serial interface that allows in-circuit on-the-fly programming of the programmable prescalers (P0 & P1) and divider (N) with the desired values being stored in nonvolatile (EEPROM) memory. Design changes can be accommodated in-circuit, on-the-fly by simply programming different values into the device (or reprogramming previously programmed devices). Alternatively, for fixed-frequency applications previously programmed devices can be used and no connection to the serial interface is required. Preprogrammed devices can be ordered in customer-requested frequencies.
The DS1077L is available in SO or µSOP packages, allowing the generation of a clock signal easily, economically, and using minimal board area. Chip-scale packaging is also available on request.
- Processor-controlled or stand-alone solid-state oscillator
- Frequency changes on the fly
- Dual, low-jitter, synchronous fixed-frequency outputs
- 2-wire serial interface
- Frequency outputs 4.87kHz to 66.666MHz ±1.25% variation over temperature and voltage
- ±0.5% initial tolerance
- Nonvolatile frequency settings
- Single 2.7V to 3.6V supply
- No external components
- Power-down mode
- Synchronous output gating
- Cable Modems
- Cell Phones
- Computer Peripherals
|User Prog. fOUT||Spread Spectrum||VCC|
|Reset Out||Oper. Temp.|
|DS1077L||66.6||4.87||±1.25 (0 to 70°C)||I2C||No||2.7 to 3.6||No||-40 to +85|
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|