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LMX2470 Datasheet(PDF) 3 Page - Texas Instruments |
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LMX2470 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 38 page LMX2470 www.ti.com SNAS195A – MAY 2004 – REVISED MAY 2004 Pin Descriptions (continued) Pin # Pin Name I/O Pin Description 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. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Value Parameter Symbol Units Min Typ Max Power Supply Voltage VCC -0.3 3.0 V VDD VCC VCC V Voltage on any pin with GND =VSS = 0V Vi -0.3 VCC + 0.3 V Storage Temperature Range Ts -65 +150 °C Lead Temperature (Solder 4 sec.) TL +260 °C (1) “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. "Recommended Operating Conditions" indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Note also that these maximum ratings imply that the voltage at all the power supply pins of VccRF, VccIF, VddRF, and VddIF are the same. VCCwill be used to refer to the voltage at these pins. (2) This Device is a high performance RF integrated circuit with an ESD rating < 2 kV and is ESD sensitive. Handling and assembly of this device should only be done at ESD-free workstations. Copyright © 2004, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LMX2470 |
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