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參數(shù)資料
| 型號(hào)： | MC33493DTB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | PLL tuned UHF Transmitter for Data Transfer Applications |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO14 |
| 封裝： | TSSOP-14 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 595K |
| 代理商： | MC33493DTB |
STATE MACHINE
MOTOROLA
MC33493 Technical Data
5
Figure 3: State machine
State 1:
The circuit is in standby mode and draws only a leakage current from the power supply.
State 2:
In this state, the PLL is out of the lock-in range. Therefore the RF output stage is switched off preventing RF
transmission. Data clock is available on pin DATACLK. Each time the device is enabled, the state machine
passes through this state.
State 3:
In this state, the PLL is within the lock-in range. If t<t
PLL_lock_in
then the PLL can still be in acquisition mode. If
t
≥
t
PLL_lock_in
, then the PLL is locked.
Data entered on pin DATA are output on pin RFOUT according to the modulation selected by the level applied on
pin MODE.
State 4:
When the supply voltage falls below the shutdown voltage threshold (V
SDWN
) the whole circuit is switched off.
Applying a low level on pin ENABLE is the only condition to get out of this state.
Figure 4 shows the waveforms of the main signals for a typical application cycle.
State 2
PLL out of lock-in range
No RF output
State 1
Standby mode
ENABLE=1
PLL in
lock-in range
V
battery
< V
shutdown
ENABLE=0
Power ON
AND ENABLE=0
State 3
Transmission mode
ENABLE=0
State 4
Shutdown mode
PLL out of
lock-in range
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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| MC33493DTBE | 功能描述:射頻發(fā)射器 PLL TUNED UHF TRANSMITTE RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
| MC33493DTBER2 | 功能描述:射頻發(fā)射器 PLL TUNED UHF TRANSMITTE RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
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