LMX2301 Datasheet | National Semiconductor

Description The LMX2301 is a high performance frequency synthesizer designed for RF operation up to 160 MHz It is fabricated using National’s ABi C IV Bi CMOS process LMX2301 which employs the digital phase lock loop technique bined with a high quality reference oscillator and a loop filter provides the tuning voltage for the voltage controlled oscillator to generate a very stable low noise local oscillator signal Serial data is transferred into the LMX2301 via a three line MICROWIRETM interface (Data Enable Clock) Supply voltage can range from 2 7V to 5 5V The LMX2301 features very low current consumption typically 2 m A at 3V The LMX2301 is available in a TSSOP 20-pin surface mount plastic package Features RF operation up to 160 MHz 2 7V to 5 5V operation Low current consumption ICC e 2 m A (typ) at VCC e 3V Internal balanced low leakage charge pump Small-outline plastic surface mount TSSOP 0 173 wide package Applications Analog Cellular telephone systems (AMPS ETACS NMT) Portable wireless munications (PCS PCN cordless) Other wireless munication systems Block Diagram TL W 12458 - 1 TRI-STATE is a registered trademark of National Semiconductor Corporation MICROWIRETM and PLLatinum TM are trademarks of National Semiconductor Corporation C1996 National Semiconductor Corporation TL W 12458 RRD-B30M126 Printed in U S A http national Connection Diagram TL W 12458 - 2 20-Lead (0 173 Wide) Thin Shrink Small Outline Package (TM) Order Number LMX2301TM or LMX2301TMX See NS Package Number MTC20 Pin Descriptions Pin No 1 Pin Name OSCIN I O I Description Oscillator input A CMOS inverting gate input intended for connection to a crystal resonator for operation as an oscillator The input has a VCC 2 input threshold and can be driven from an external CMOS or TTL logic gate May also be from a reference oscillator Oscillator output Power supply for charge pump Must be t VCC Power supply voltage input Input may range from 2 7V to 5 5V Bypass...