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LMX2470SLEX Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LMX2470SLEX Datasheet(HTML) 2 Page - National Semiconductor (TI) |
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2 / 36 page  Connection Diagram 24-Pin CSP (SLE) Package 20059322 Pin Descriptions Pin # Pin Name I/O Pin Description 1 CPoutRF O RF charge pump output. 2 GND - Ground 3 GND - RF Ground 4 GND - Ground for RF PLL digital circuitry. 5 FinRF I RF prescaler input. Small signal input from the VCO. 6 FinRF* I RF prescaler complimentary input. For single-ended operation, a bypass capacitor should be placed as close as possible to this pin and be connected directly to the ground plane. 7 VccRF RF PLL power supply voltage input. Must be equal to VccIF . May range from 2.25V to 2.75V. Bypass capacitors should be placed as close as possible to this pin and be connected directly to the ground plane. 8 EN I Chip enable input. High impedance CMOS input. When EN is high, the chip is powered up, otherwise it is powered down. 9 ENOSC I This pin should be grounded for normal operation. 10 CLK I MICROWIRE Clock. High impedance CMOS Clock input. Data for the various counters is clocked into the 24 bit shift register on the rising edge. 11 DATA I MICROWIRE Data. High impedance binary serial data input. 12 LE MICROWIRE Load Enable. High impedance CMOS input. Data stored in the shift registers is loaded into the internal latches when LE goes HIGH 13 Ftest/LD O Test frequency output / Lock Detect 14 VddIF - Digital power supply for IF PLL 15 VccIF - IF power supply voltage input. Must be equal to VccRF. Input may range from 2.25 V to 2.75 V. Bypass capacitors should be placed as close as possible to this pin and be connected directly to the ground plane. 16 GND - Ground for RF PLL digital circuitry. 17 FinIF I IF prescaler input. Small signal input from the VCO. 18 GND - Digital ground for IF PLL 19 CPoutIF O IF PLL charge pump output 20 FLoutIF O IF Fastlock Output. Also functions as Programmable TRI-STATE CMOS output. 21 OSCout* I/O Complementary reference input or oscillator output. 22 OSCin I Reference input 23 VddRF - Digital power supply for RF PLL 24 FLoutRF O RF Fastlock Output. Also functions as Programmable TRI-STATE CMOS output. www.national.com 2 |
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