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LMX2335 Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LMX2335 Datasheet(HTML) 2 Page - National Semiconductor (TI) |
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2 / 18 page  Connection Diagrams Pin Descriptions Pin No. 2335/37 Pin No. 2336 Pin Name I/O Description 11 V CC1 Power supply voltage input for RF1 analog and RF1 digital circuits. Input may range from 2.7V to 5.5V. V CC1 must equal VCC2. Bypass capacitors should be placed as close as possible to this pin and be connected directly to the ground plane. 22 V p1 Power supply for RF1 charge pump. Must be ≥ V CC. 33 D o1 O RF1 charge pump output. For connection to a loop filter for driving the input of an external VCO. 4 4 GND LMX2335/37: Ground for RF1 analog and RF1 digital circuits. LMX2336: Ground for RF digital circuitry. 55 f IN1 I First RF prescaler input. Small signal input from the VCO. X6 f IN1 I RF1 prescaler complementary input. A bypass capacitor should be placed as close as possible to this pin and be connected directly to the ground plane. Capacitor is optional with loss of some sensitivity. X 7 GND Ground for RF1 analog circuitry. 6 8 OSC in I Oscillator input. The input has a V CC/2 input threshold and can be driven from an external CMOS or TTL logic gate. 7 9 OSC out O Oscillator output. 810 F oLD O Multiplexed output of the programmable or reference dividers, lock detect signals and Fastlock mode. CMOS output (see Programmable Modes). 9 11 Clock I High impedance CMOS Clock input. Data for the various latches is clocked in on the rising edge, into the 20-bit shift register. 10 12 Data I Binary serial data input. Data entered MSB first. The last two bits are the control bits. High impedance CMOS input. 11 13 LE I Load enable high impedance CMOS input. When LE goes HIGH, data stored in the shift registers is loaded into one of the 4 appropriate latches (control bit dependent). X 14 GND Ground for RF2 analog circuitry. X15 f IN2 I RF2 prescaler complementary input. A bypass capacitor should be placed as close as possible to this pin and be connected directly to the ground plane. Capacitor is optional with loss of some sensitivity. 12 16 f IN2 I RF2 prescaler input. Small signal input from the VCO. 13 17 GND LMX2335/37: Ground for RF2 analog, RF2 digital, MICROWIRE™,F oLD and Oscillator circuits. LMX2336: Ground for RF2 digital, MICROWIRE, F oLD and Oscillator circuits. 14 18 D o2 O RF2 charge pump output. For connection to a loop filter for driving the input of an external VCO. 15 19 V p2 Power supply for RF2 charge pump. Must be ≥ V CC. LMX2335/LMX2337 DS012332-2 Order Number LMX2335M/LMX2335TM or LMX2337M/LMX2337TM NS Package Number M16A and MTC16 LMX2336 DS012332-16 Order Number LMX2336TM NS Package Number MTC20 www.national.com 2 |
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