National LMX2314 LMX2315 Data Sheet
Summary
This high-performance PLLatinum frequency synthesizer is an essential RF component designed for robust operation up to 1.2 GHz. Built using advanced BiCMOS technology, it features low current consumption and integrated dual modulus prescalers. Ideal for developing portable wireless communications, cellular phone systems (GSM, IS-95), and various general RF applications. The accompanying technical documentation provides comprehensive details on pin configurations, functional blocks, connection diagrams, and operating parameters for seamless system integration.
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th iz fo rs ic tio LMX2314/LMX2315 PLLatinum TM 1.2 GHz Frequency Synthesizer for RF Personal Communications General Description Features
The LMX2314 and the LMX2315 are high performance fre- RF operation up to 1.2 GHz
quency synthesizers with integrated prescalers designed for 2.7V to 5.5V operation RF operation up to 1.2 GHz. They are fabricated using Na- Low current consumption: tional’s ABi C IV Bi CMOS process. ICC m A (typ) at VCC 3V The LMX2314 and the LMX2315 contain dual modulus pre- Dual modulus prescaler: 64/65 or 128/129 scalers which can select either 64/65 or 128/129 divide Internal balanced, low leakage charge pump ratio at input frequencies of up to 1.2 GHz. Using proprie-
Power down feature for sleep mode:
tary digital phase locked loop technique, the LMX2314/15’s
ICC m A (typ) at VCC 3V
linear phase detector characteristics can generate very sta-
Small-outline, plastic, surface mount JEDEC, 0.150×
ble, low noise local oscillator signals.
wide, (2314) or TSSOP, 0.173× wide, (2315) package
Serial data is transferred into the LMX2314 and the LMX2315 via three line MICROWIRETM interface (Data,
Applications
Enable, Clock). Supply voltage can range from 2.7V to 5.5V.
Cellular telephone systems
The LMX2314 and the LMX2315 feature very low current
(GSM, IS-54, IS-95, RCR-27)
consumption, typically m A at 3V.
Portable wireless communications
The LMX2314 is available in JEDEC 16-pin surface mount
(DECT, ISM902-928 CT-2)
plastic package. The LMX2315 is available in TSSOP
Other wireless communication systems
20-pin surface mount plastic package.
Block Diagram
TL/W/11766–1
TRI-STATEÉ is 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.
Page Summary Contents For National LMX2314 LMX2315 Data Sheet
Manual Details
| Brand | National |
|---|---|
| Pages | 20 |
| File Size | 363.50 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the typical current consumption of the synthesizer?
The typical DC current consumption is 6 mA at 3V.
How do I power down the device to save power?
Bring the PWDN pin LOW. The power down function is gated by the charge pump to prevent frequency jumps.
What voltage range can be used for the supply?
The supply voltage (Vcc) can range from 2.7V to 5.5V.
How is serial data transferred into the LMX2314/LMX2315?
Data is transferred via a three-line MICROWIRE interface: Data, Applications Enable, and Clock.