CXA1787N

CXA1787N 2GHz-band PLL IC for Mobile Communications Descriptions The CXA1787N is a frequency synthesizer PLL IC developed for use in mobile communication systems. This IC has low current consumption, small package and is suitable for portable sets of cellular telephone and others. Features Low current consumption Icc = 8.0mA (typ.) 0.3mA (typ.) in power saving mode Maximum operating frequency 1.8GHz guaranteed Operating supply voltage range 2.7 to 5.5V Ultra small 20-pin SSOP package Two types of phase comparator output: For external charge pump φR φP Two internal charge pumps DO1 DO2 Applications 1.1GHz-band mobile communication equipment such as cellular telephones 20 pin SSOP (Plastic) Structure Bipolar silicon monolithic IC Absolute Maximum Ratings Supply voltage Vcc Operating temperature Topr Storage temperature Tstg Allowable power dissipation PD Operating Condition Supply voltage 7 –35 to +85 –65 to +150 300 V °C °C mW Vcc 2.7 to 5.5 V Block Diagram and Pin Configuration OSCI 1 20 φR NC 2 Phase Comparator 19 NC OSCO 3 18 φP Vp 4 Reference Programmable Counter 14bits 17 TEST VCC 5 16 DO2 DO 1 6 Charge Pump 1 Charge Pump 2 15 FC GND 7 14 LAT LD 8 Pulse Swallow Counter 7bits Programmable Counter 11bits 13 DATA NC 9 1-bit Latch 14-bit Latch 18-bit Shift Resister 1-bit Shift Resister 12 PS FIN 10 2-modulus prescaler 1 1 or 64/65 128/129 Pulse swallow programmable counter 11 CK 18-bit Latch Sony reserves the...