LMX1511 Datasheet | National Semiconductor

Description The LMX1501A and the LMX1511 are high performance frequency synthesizers with integrated prescalers designed for RF operation up to 1 1 GHz They are fabricated using National’s ABi C IV Bi CMOS process The LMX1501A and the LMX1511 contain dual modulus prescalers which can select either a 64 65 or a 128 129 divide ratio at input frequencies of up to 1 1 GHz Using a proprietary digital phase locked loop technique the LMX1501A 11’s linear phase detector characteristics can generate very stable low noise local oscillator signals Serial data is transferred into the LMX1501A and the LMX1511 via a three line MICROWIRETM interface (Data Enable Clock) Supply voltage can range from 2 7V to 5 5V The LMX1501A and the LMX1511 feature very low current consumption typically 6 m A at 3V The LMX1501A is available in a JEDEC 16-pin surface mount plastic package The LMX1511 is available in a TSSOP 20-pin surface mount plastic package Features RF operation up to 1 1 GHz 2 7V to 5 5V operation Low current consumption ICC e 6 m A (typ) at VCC e 3V Dual modulus prescaler 64 65 or 128 129 Internal balanced low leakage charge pump Small-outline plastic surface mount JEDEC 0 150 wide (1501A) or TSSOP 0 173 wide (1511) package Applications Cellular telephone systems (AMPS NMT ETACS) Portable wireless munications (PCS PCN Cordless) Advanced cordless telephone systems (CT-1 CT-1 a CT-2 ISM902-928) Other wireless munication systems Block Diagram TL W 12340 - 1 TRI-STATE is a registered trademark of National Semiconductor Corporation MICROWIRETM and PLLatinum TM are trademarks of National Semiconductor Corporation C1995 National Semiconductor Corporation TL W 12340 RRD-B30M115 Printed in U S A Connection Diagrams LMX1501A LMX1511 TL W 12340- 2 JEDEC 16-Lead (0 150 Wide) Small Outline Molded Package (M) Order Number LMX1501AM or LMX1501AMX See NS Package Number M16A TL W 12340 - 3 20-Lead (0 173 Wide) Thin Shrink Small Outline Package (TM) Order Number...