PLL ICs Embed EEPROM Memory For Fixed Frequency Apps

The first two products of a new family of high performance PLL synthesizers are designed for use in fixed frequency applications. The PE3341 and PE3342 operate up to 2,800 MHz and contain an embedded 20-bit EEPROM memory that can be programmed to set the PLL counter values at device power-up. The PLLs will support operating frequencies of 500 MHz to 2,800 MHz. They exhibit phase noise performance of 86 dBc/Hz typical, with a comparison frequency of 1 MHz at a 10 kHz offset from a center frequency of 2,800 MHz. The ICs encompass a 10/11 dual modulus prescaler, a 4-bit swallow counter, a 9-bit main counter, and a 6-bit reference counter. The PE3341 is designed with an integrated charge pump output, while the PE3342 is designed with a digital phase detector output. They operate on a nominal 3V supply with a total current consumption of less than 30 mA. Available in a 24-lead TSSOP package, pricing for both devices starts at $6.95 each/10,000. PEREGRINE SEMICONDUCTOR CORP., San Diego, CA. (800) 737-6937.