LMX1601 Datasheet | National Semiconductor

Features n VCC = 2.7V to 3.6V operation n Low current consumption: 4 m A @ 3V (typ) for LMX1601 5 m A @ 3V (typ) for LMX1600 or LMX1602 n PLL Powerdown mode: ICC = 1 µA typical n Dual modulus prescaler: - 2 GHz/500 MHz option: (Main) 32/33 (Aux) 8/9 - 1.1 GHz/500 MHz option: (Main) 16/17 (Aux) 8/9 - 1.1 GHz/1.1 GHz option: (Main) 16/17 (Aux) 16/17 n Digital Filtered Lock Detects General Description The LMX1600/01/02 is part of a family of monolithic integrated dual frequency synthesizers designed to be used in a local oscillator subsystem for a radio transceiver. It is fabricated using National’s 0.5u ABi C V silicon Bi CMOS process. The LMX1600/01/02 contains two dual modulus prescalers, four programmable counters, two phase detectors and two selectable gain charge pumps necessary to provide the control voltage for two external loop filters and VCO loops. Digital filtered lock detects for both PLLs are included. Data is transferred into the LMX1600/01/02 via a MICROWIRE™ serial interface (Data, Clock, LE). VCC supply voltage can range from 2.7V to 3.6V. The LMX1600/01/02 features very low current consumption typically 4.0 m A at 3V for LMX1601, 5.0 m A at 3V for LMX1600 or LMX1602. Powerdown for the PLL is hardware controlled. The LMX1600/01/02 is available in a 16 pin TSSOP surface mount plastic package. Applications n Cordless / Cellular / PCS phones n Other digital mobile phones Functional Block Diagram DS100129-1 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. MICROWIRE™ and PLLatinum™ are trademarks of National Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100129 .national. Connection Diagram DS100129-2 Order Number LMX1600TM, LMX1601TM, or LMX1602TM NS Package Number MTC16 Pin Description Pin No. 1 2 Pin Name Fo LD OSCIN I/O O I Description Multiplexed output of the Main/Aux programmable or reference dividers and Main/Aux lock detect. CMOS output. (See Programming Description 2.5) PLL reference input...