LMX2314 Datasheet | National Semiconductor

LMX2314 LMX2315 PLLatinum 1 2 GHz Frequency Synthesizer for RF Personal munications March 1995 LMX2314 LMX2315 PLLatinum TM 1 2 GHz Frequency Synthesizer for RF Personal munications General Description The LMX2314 and the LMX2315 are high performance frequency synthesizers with integrated prescalers designed for RF operation up to 1 2 GHz They are fabricated using National’s ABi C IV Bi CMOS process The LMX2314 and the LMX2315 contain dual modulus prescalers which can select either a 64 65 or a 128 129 divide ratio at input frequencies of up to 1 2 GHz Using a proprietary digital phase locked loop technique the LMX2314 15’s linear phase detector characteristics can generate very stable low noise local oscillator signals Serial data is transferred into the LMX2314 and the LMX2315 via a three line MICROWIRETM interface (Data Enable Clock) Supply voltage can range from 2 7V to 5 5V The LMX2314 and the LMX2315 feature very low current consumption typically 6 m A at 3V The LMX2314 is available in a JEDEC 16-pin surface mount plastic package The LMX2315 is available in a TSSOP 20-pin surface mount plastic package Features RF operation up to 1 2 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 Power down feature for sleep mode ICC e 30 m A (typ) at VCC e 3V Small-outline plastic surface mount JEDEC 0 150 wide (2314) or TSSOP 0 173 wide (2315) package Applications Cellular telephone systems (GSM IS-54 IS-95 RCR-27) Portable wireless munications (DECT ISM902-928 CT-2) Other wireless munication systems Block Diagram TL W 11766 - 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 11766 RRD-B30M115 Printed in U S A Connection Diagrams LMX2314 LMX2315 TL W 11766- 2 JEDEC...