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LMX2335L Folha de dados(PDF) 3 Page - National Semiconductor (TI) |
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LMX2335L Folha de dados(HTML) 3 Page - National Semiconductor (TI) |
3 / 22 page Pin Descriptions (Continued) Pin No. Pin No. Pin No. Pin No. Pin I/O Description 2336LTM 2336LSLB 2335LTM 2335LSLB Name 8865 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. 9 10 7 6 OSC out O Oscillator output. 10 11 8 7 F oLD O Multiplexed output of the programmable or reference dividers, lock detect signals and Fastlock mode. CMOS output (see Programmable Modes). 11 12 9 8 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. 12 14 10 9 Data I Binary serial data input. Data entered MSB first. The last two bits are the control bits. High impedance CMOS input. 13 15 11 10 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). 14 16 X X GND Ground for RF2 analog circuitry. 15 17 X X /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. 16 18 12 11 f IN 2 I RF2 prescaler input. Small signal input from the VCO. 17 19 13 12 GND LMX2335L: Ground for RF2 analog, RF2 digital, MICROWIRE, F oLD and Oscillator circuits. LMX2336L: Ground for IF digital, MICROWIRE, F oLD and oscillator circuits. 18 20 14 13 D o 2 O RF2 charge pump output. For connection to a loop filter for driving the input of an external VCO. 19 22 15 14 V p2 Power supply for RF2 charge pump. Must be ≥ V CC. 20 23 16 15 V CC2 Power supply voltage input for RF2 analog, RF2 digital, MICROWIRE, F oLD and oscillator circuits. Input may range from 2.7V to 5.5V. V CC2 must equal VCC1. Bypass capacitors should be placed as close as possible to this pin and be connected directly to the ground plane. X 1,9,13, 21 X X NC No connect. www.national.com 3 |
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