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AX5042

2

Table of Contents

1. Overview.......................................................................................................................................5

1.1. Features .............................................................................................................................................. 5

1.2. Applications....................................................................................................................................... 5

2. Block Diagrams ............................................................................................................................6

3. Pin Function Descriptions ............................................................................................................7

3.1. Pinout Drawing.................................................................................................................................. 8

4. Specifications ...............................................................................................................................9

4.1. Absolute Maximum Ratings ............................................................................................................ 9

4.2. DC Characteristics ......................................................................................................................... 10

Supplies ............................................................................................................................................. 10

Logic .................................................................................................................................................. 11

4.3. AC Characteristics ......................................................................................................................... 12

Crystal Oscillator.............................................................................................................................. 12

RF Frequency Generation Subsystem (Synthesizer).................................................................. 13

Transmitter ........................................................................................................................................ 14

Receiver ............................................................................................................................................ 15

SPI Timing .......................................................................................................................................... 17

Wire Mode Interface Timing.......................................................................................................... 17

5. Circuit Description......................................................................................................................18

5.1. Crystal Oscillator ............................................................................................................................. 19

5.2. SYSCLK Output ................................................................................................................................ 19

5.3. PWRUP Input .................................................................................................................................... 19

5.4. RESET_N Input................................................................................................................................... 20

5.5. DATA Input/Output and DCLK Output....................................................................................... 20

5.6. RF Frequency Generation Subsystem......................................................................................... 21

VCO ................................................................................................................................................... 21