说明The DS1065 is a fixed-frequency oscillator requiring no external components for operation. Numerous operating frequencies are possible in the range of approximately 30kHz to 100MHz through the use of an on-chip programmable prescaler and divider.
The DS1065 features a master oscillator followed by a prescaler and then a programmable divider. The prescaler and programmable divider are user-programmable with the desired values being stored in nonvolatile memory. This allows the user to buy an off-the-shelf component and program it on site prior to board production. Design changes can be accommodated easily by simply programming different values into the device (or reprogramming previously programmed devices). The DS1065 is shipped from the factory configured for half the maximum operating frequency. Contact the factory for specially programmed devices.
The DS1065 features a dual-purpose Input/Output pin. If the device is powered up in Program mode this pin can be used to input serial data to the on-chip registers. After a write command this data is stored in nonvolatile memory. When the chip is subsequently powered up in operating mode these values are automatically restored to the on-chip registers and the Input/Output pin becomes the oscillator output.
- 30kHz to 100MHz output frequencies
- User-programmable on-chip dividers (from 1 to 513)
- User-programmable on-chip prescaler (1, 2, 4)
- No external components
- ±0.5% initial tolerance
- ±3% variation over temperature and voltage
- Single 5V supply