MC33493 Motorola, MC33493 Datasheet - Page 6

• Manufacturer Part Number: MC33493
• Description: PLL tuned UHF Transmitter for Data Transfer Applications
• Manufacturer: Motorola

ENABLE
DATACLK
DATA
RFOUT
POWER MANAGEMENT
When the battery voltage falls below the shutdown voltage threshold (V
has to be noted that after this shutdown, the circuit is latched until a low level is applied on pin ENABLE (see
state 4 of the state machine).
DATA CLOCK
At start-up data clock timing is valid after the data clock settling time. As clock is switched off asynchronously,
the last period duration cannot be guaranteed.
POWER MANAGEMENT
6
MODE=0 (OOK)
MODE=1 (FSK)
State 1
t
DATACLK_settling >
Figure 4: Signals waveforms and timings definition
Freescale Semiconductor, Inc.
t
State 2
PLL_lock_in
For More Information On This Product,
MC33493 Technical Data
t
PLL_lock_in
Go to: www.freescale.com
€
f
high
€
: PLL locked
f
carrier
f
low
State 3
SDWN
f
high
) the whole circuit is switched off. It
f
low
f
carrier
f
high
MOTOROLA
State 1