UMA1005

INTEGRATED CIRCUITS DATA SHEET UMA1005T Dual low-power frequency synthesizer Preliminary specification Supersedes data of September 1992 File under Integrated Circuits, IC03 November 1994 Philips Semiconductors Philips Semiconductors Preliminary specification Dual low-power frequency synthesizer FEATURES Fast locking by ‘Fractional-N’ divider Auxiliary synthesizer Digital phase comparator with proportional and integral charge pump output High-speed serial input Low-power consumption Programmable charge pump currents Supply voltage range 2.9 to 5.5 V. APPLICATIONS Mobile telephony Portable battery-powered radio equipment. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME UMA1005T SSOP20 DESCRIPTION GENERAL DESCRIPTION UMA1005T The UMA1005T is a low-power, high-performance dual frequency synthesizer fabricated in CMOS technology. Fractional-N division with selectable modulo 5 or 8 is implemented in the main synthesizer. The detectors and charge pumps are designated to achieve 10 to 5000 kHz channel spacing using fractional-N decreases the channel spacing by a factor 5 or 8. Together with an external standard 2, 3 or 4 ratio prescaler the main synthesizer can operate in the GHz frequency range. Channel selection and programming is realized by a high-speed 3-wire serial interface. VERSION SOT266-1 plastic shrink small outline package; 20 leads; body width 4.4 mm November 1994 2 Philips Semiconductors Preliminary specification Dual low-power frequency syn...