DALLAS SEMICONDUCTOR ANNOUNCES FAMILY OF OSCILLATOR CHIPS THAT OFFER HIGH DEGREE OF ACCURACY WITHOUT AN EXTERNAL REFERENCE
DALLAS, TX-September 8, 1998-Dallas Semiconductor today announced three new devices in its family of EconOscillators, space-saving, practical replacements for bulky resonators and oscillators. Each of the reprogrammable, single-chip devices provides system reference frequencies using less board space than alternative devices. The new devices extend the family by adding 3-volt operation, industrial temperature range operation, and TO-92 packaging.
EconOscillators provide design engineers onboard programmable clock reference frequency. Multiple output frequencies in the 30 kHz to 100 MHz range are possible through the use of a master oscillator followed by a user-programmable, on-chip prescaler and divider.
"Designs based on EconOscillators typically cost less and are less complex, speeding time to market for new designs," said product manager Bob Brown.
There are three new EconOscillator devices:
- The DS1075-IND, a version of the original DS1075 EconOscillator characterized for operation over the -40° to +85° C industrial temperature range.
- The DS1073, a 3-volt version of the DS1075 suitable for small, battery-powered, handheld applications and others systems that require low-voltage operation.
- The DS1065, providing the programmable feature of the DS1075 in a space-saving, 3-lead TO-92 package.
For General-Purpose, Fixed-Frequency Applications
"Almost every electronic system requires some sort of clock reference," Brown said. "EconOscillators make it possible to implement an accurate frequency reference at a low cost." Typical applications include set-top boxes, tabletop games, disk drives, digital cameras, PCMCIA cards, laptop computers, access control systems, video cards and motherboards.
Commercial temperature range EconOscillators are accurate to ±1% over time and temperature, and the DS1075-IND is accurate to ±3°. No external timing components are required. "This high degree of accuracy makes EconOscillators attractive alternatives to 555-based clock circuits and crystal oscillators. EconOscillators are more compact and more economical."
If greater timing accuracy is required, an 8-pin EconOscillator can be used with an external clock or a crystal reference. This flexibility provides an alternative to crystal-in-a-can oscillators and more expensive PLL-based frequency synthesis approaches.
Designers can buy off-the-shelf components and program them prior to board production. Programmability and in-circuit reprogrammability make a single device useful in multiple applications and able to accommodate design changes during breadboarding, prototyping or production revision. Design changes can be accommodated easily--users can program different values into the devices or reprogram previously selected values.
For high-volume applications, Dallas Semiconductor can program devices to provide any frequency in the EconOscillator range prior to shipment, further simplifying the design and manufacturing process.
Development Tools
Ideal for breadboarding and pre-production use, the DS1075K EconOscillator Development Kit is compatible with every device in the family. A designer can use the kit to program frequencies off-line and make breadboarding changes easily as needed. The price of the kit is $99.00 in quantities of one.
Also available is the DS1075X Crystal Replacement Module, designed to permit easy replacement of crystal oscillators.
The DS1073 and DS1075-IND are available in 8-pin, 300-mil DIP and 8-pin, 150-mil SOIC packages. The DS1065 is supplied only in a 3-lead TO-92 package. Tape-and-reel packaging is available on request.
Dallas Semiconductor designs, manufactures and markets CMOS chips and chip-based subsystems. In its 14-year history, the company has sold its products to more than 15,000 customers worldwide. Major markets include Original Equipment Manufacturers (OEMs) in personal computers, telecommunications, office equipment, instrumentation, factory automation, medical equipment and mainframe computers.
|
