UMA1005 Datasheet | NXP Semiconductors

FEATURES - Fast locking by ‘Fractional-N’ divider - Auxiliary synthesizer - Digital phase parator 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 k Hz 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 Philips Semiconductors Preliminary specification Dual low-power frequency synthesizer BLOCK DIAGRAM UMA1005T /1 page = 296 mm (Datasheet) 4 DATA 5 CLOCK 6 STROBE 27 mm SERIAL INPUT + PROGRAM LATCHES EM 2 INM1 INM2 3 PR 2 NM1 12 NM2 NM3 8 NM4 4 FMOD NF 3 PRESCALER FEEDBACK CN 8 NORMAL OUTPUT CHARGE PUMP CL 13 SPEED-UP OUTPUT CHARGE PUMP CK PHP 15 18 19 16 FB1 FB2 RF RN MAIN DIVIDERS FRACTIONAL ACCUMULATOR FRD EM MAIN PHASE DETECTOR UMA1005T SM 2 NR EM + EA 7 12 REFERENCE DIVIDER SA 2 AUXILIARY REFERENCE SELECT 2 2 2 2 MAIN REFERENCE SELECT 4 INTEGRAL OUTPUT CHARGE PUMP 11 PHI 9 AUXILIARY OUTPUT CHARGE...