DS1085L

Voltage on Any Pin Relative to Ground ........-0.5V to +6.0V
Operating Temperature Range ..................0°C to +70°C
Storage Temperature Range................ -55°C to +125°C
Soldering Temperature............ See IPC/JEDEC J-STD-020A

* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

The DS1085L is a dual-output frequency synthesizer requiring no external timing components for operation. DS1085L can be used as a standalone oscillator or as a dynamically programmed, processor-controlled peripheral device. An internal master oscillator can be programmed from 33MHz to 66MHz with three resolution options of 5kHz, 12.5kHz, and 25kHz. A programmable 3-bit prescaler (divide-by-1, 2, 4, or 8) permits the generation of a reference oscillator output (OUT0) from the master, ranging from 4.13MHz to 66MHz. A second independent prescaler and a 1-to-1025 divider allow the generation of a main oscillator output (OUT1) from 4.1kHz to 66MHz. The two outputs, although synchronous with the master, can be independently programmed. The combination of programmable master oscillator, prescalers, and dividers allows the generation of thousands of user-specified frequencies. All master oscillator, prescaler, and divider settings are stored in NV (EEPROM) memory, providing a default value on power-up that allows
DS1085L to be used as a standalone oscillator. A 2-wire serial interface allows in-circuit, on-the-fly programming of the master oscillator, prescalers (P0 and P1), and divider (N). This allows dynamic frequency modification, if required, or, for fixed-frequency applications, the DS1085L can be used with factory- or user-programmed values.