LMX2322 Datasheet | National Semiconductor

Description The LMX2322 is a high performance frequency synthesizer with integrated 32/33 dual modulus prescaler designed for RF operation up to 2.0 GHz. Using a proprietary digital phase locked loop technique, the LMX2322’s linear phase detector characteristics can generate very stable, low noise control signals for UHF and VHF voltage controlled oscillators. Serial data is transferred into the LMX2322 via a three-line TM MICROWIRE interface (Data, LE, Clock). Supply voltage range is from 2.7 V to 3.9 V. The LMX2322 features very low current consumption, typically 3.5 m A at 3.75V. The charge pump provides 4m A output current. The LMX2322 is manufactured using National’s ABi C V Bi CMOS process and is packaged in a 16 pin TSSOP and a 16 pin Chip Scale Package (CSP). Features - - - RF operation up to 2.0 GHz 2.7 V to 3.9 V operation Low current consumption: Icc = 3.5 m A (typ) at Vcc = 3.75 V - Dual modulus prescaler: 32/33 - Internal balanced, low leakage charge pump Applications - - - - Cellular telephone systems (GSM, NADC, CDMA, PDC, PHS) Personal wireless munications (DCS-1800, DECT, CT-1+) Wireless local area networks (WLANs) Other wireless munication systems Functional Block Diagram OSC 10-Bit R Counter OSCin CLOCK LE DATA 18-Bit Microwire Interface Phase p Charge Pump CPo fin fin Prescaler 32/33 15-Bit N Counter 9/24/1998 Rev 1.6 1 Advance Information Connection Diagram NC OSCin NC Vp Vcc CPo GND Xfin fin 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 NC NC NC NC CE LE Data Clock fin NC Clock Xfin 5 6 7 8 9 Data Vp Vcc CPo GND 1 2 3 4 16 OSCin 15 NC 14 13 12 11 10 NC NC CE LE TSSOP 16 CSP 16 (TOP VIEW) Pin Description Pin No. TSSOP 16 1 3 4 5 6 7 8 9 10 11 12 2,13,14, 15, 16 Pin Name CSP 16 I 15 1 2 3 4 5 6 8 9 10 11 7,12,13 14, 16 OSCin Vp Vcc CPo GND Xfin fin Clock Data LE CE NC I I I I I O I Oscillator input. A CMOS inverting gate input. The input has a Vcc/2 input threshold and can be driven from an external CMOS or TTL logic gate. May...