Twin Transistor Devices Combine Oscillator And Buffer Circuitry

Developed to help simplify VCO module designs, the UPA861TD combines the companyÕs high performance NE894 oscillator chip with its NE687 buffer chip into a single miniature package. The twin transistor device features the low-voltage, low-current operation required in portable, battery-powered applications. And its miniature 6-pin package makes it ideal for size-constrained designs like cellular/cordless phones, pagers and PCMCIA cards. The TD has a footprint of 1.2 mm x 0.8 mm, while its flat-lead design reduces its height to 0.50 mm. The oscillator can be designed to operate at 3.6 GHz, then frequency divided by two to get to 1,800 MHz or by four to get to 900 MHz. Available now in bulk or on tape and reel, prices for the UPA861TD start at $0.35 each/100,000. CALIFORNIA EASTERN LABORATORIES, Santa Clara, CA. (408) 988-3500.