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LMX2331LSLBX Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LMX2331LSLBX Datasheet(HTML) 3 Page - National Semiconductor (TI) |
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3 / 23 page  Pin Descriptions Pin No. LMX233XLSLD 20-pin Thin CSP Package Pin No. LMX233XLSLB 24-pin CSP Package Pin No. LMX233XLTM 20-pin TSSOP Package Pin Name I/O Description 20 24 1 V CC1 — Power supply voltage input for RF analog and RF 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. 122 V P1 — Power Supply for RF charge pump. Must be ≥ V CC. 233 D o RF O Internal charge pump output. For connection to a loop filter for driving the input of an external VCO. 3 4 4 GND — Ground for RF digital circuitry. 455 f IN RF I RF prescaler input. Small signal input from the VCO. 566 f IN RF I RF 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 some loss of sensitivity. 6 7 7 GND — Ground for RF analog circuitry. 788 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. 8 10 9 GND — Ground for IF digital, MICROWIRE™,F oLD, and oscillator circuits. 911 10 F oLD O Multiplexed output of the RF/IF programmable or reference dividers, RF/IF lock detect signals and Fastlock mode. CMOS output (see Programmable Modes). 10 12 11 Clock I High impedance CMOS Clock input. Data for the various counters is clocked in on the rising edge, into the 22-bit shift register. 11 14 12 Data I Binary serial data input. Data entered MSB first. The last two bits are the control bits. High impedance CMOS input. 12 15 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). 13 16 14 GND — Ground for IF analog circuitry. 14 17 15 f IN IF I IF 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 some loss of sensitivity. 15 18 16 f IN RF I IF prescaler input. Small signal input from the VCO. 16 19 17 GND — Ground for IF digital, MICROWIRE, F oLD, and oscillator circuits. 17 20 18 D o IF O IF charge pump output. For connection to a loop filter for driving the input of an external VCO. 18 22 19 V P2 — Power Supply for IF charge pump. Must be ≥ V CC. 19 23 20 V CC2 — Power supply voltage input for IF analog, IF 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 NC — No connect. www.national.com 3 |
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