mc33493a Freescale Semiconductor, Inc, mc33493a Datasheet - Page 2

• Manufacturer Part Number: mc33493a
• Description: Pll Tuned Uhf Transmitter For Data Transfer
• Manufacturer: Freescale Semiconductor, Inc

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10 Radio Frequency (RF) Output Spectrum . . . . . . . . . . . . . . . .11
11 Output Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . .14
12 Complete Application Schematic and
13 Complete Application Schematic and
14 Recommendations for FSK Modulation . . . . . . . . . . . . . . . . .19
15 Case Outline Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
List of Figures
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Figure 1. Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 2. Crystal Pulling Configurations. . . . . . . . . . . . . . . . . . . . 5
Figure 3. State machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Signals Waveform and Timing Definition . . . . . . . . . . . 7
Figure 5. RF Spectrum at 434 MHz Frequency Band
Figure 6. RF Spectrum at 434 MHz Frequency Band
Figure 7. RF Spectrum at 434 MHz Frequency Band
Figure 8. RF Spectrum at 434 MHz Band
Transmitter Functional Description . . . . . . . . . . . . . . . . . . . . . .4
Phase Locked Loop and Local Oscillator . . . . . . . . . . . . . . . . .4
RF Output Stage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Microcontroller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
State Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Data Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
PCB for OOK Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
PCB for FSK Modulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Displayed with a 5 MHz Span . . . . . . . . . . . . . . . . . . . 11
Displayed with a 50 MHz Span . . . . . . . . . . . . . . . . . . 11
Displayed with a 1.5 GHz Span . . . . . . . . . . . . . . . . . 12
for a 70 kHz FSK Deviation at 4.8 kbit/s . . . . . . . . . . . 12
PLL Tuned UHF Transmitter for Data Transfer Applications, Rev. 2
Table of Contents
List of Tables
Figure 9. Output Power Measurement Configurations . . . . . . . . 13
Figure 10.Output Model and Matching Network
Figure 11.Output Power at 434 MHz Band vs Rext Value . . . . . 14
Figure 12.Application Schematic for OOK Modulation,
Figure 13.Two-Button Keyfob Board Layout . . . . . . . . . . . . . . . . 16
Figure 14.Application Schematic for FSK Modulation,
Figure 15.Application PCB Layout for FSK Modulation,
Figure 16.Crystal Load Capacitance Contributors Schematic . . 19
Figure 17.Case Outline Dimensions . . . . . . . . . . . . . . . . . . . . . 20
Table 1. Pin Function Description . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . 3
Table 3. Band Selection and Associated Divider Ratios . . . . . . . 4
Table 4. DATACLK Frequency vs Crystal Oscillator Frequency. . 5
Table 5. Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. External Components Description for OOK. . . . . . . . . 15
Table 7. Typical Crystal Characteristics (SMD Package) . . . . . 16
Table 8. External Components Description for FSK . . . . . . . . . 17
Table 9. Crystal Pulling Capacitor Values vs
Table 10.Crystal Pulling Capacitor Values vs
Table 11.Pads and Tracks Parasitic Values . . . . . . . . . . . . . . . . 19
for 434 MHz Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
434 MHz Frequency Band . . . . . . . . . . . . . . . . . . . . . . 15
Serial Configuration, 434 MHz Frequency Band . . . . . 17
Serial Configuration, 434 MHz Frequency Band . . . . . 18
Carrier Frequency Total Deviation -1- . . . . . . . . . . . . . 18
Carrier Frequency Total Deviation -2- . . . . . . . . . . . . . 18
Freescale Semiconductor