T5743N-TG Atmel, T5743N-TG Datasheet - Page 12

• Manufacturer Part Number: T5743N-TG
• Manufacturer: Atmel

Specifications of T5743N-TG

• Operating Frequency (max): 450000kHz
• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Not Compliant

Digital Signal Processing
The data from the ASK/ FSK demodulator (Dem_out) is
digitally processed in different ways and as a result con-
verted into the output signal data. This processing
depends on the selected baud-rate range (BR_Range).
Figure 16 illustrates how Dem_out is synchronized by the
extended clock cycle T
bit-check counter. Data can change its state only after
T
Data signal as a result is always an integral multiple of
T
The minimum time period between two edges of the data
T5743N
Dem_out
Data_out (DATA)
Bit check
IC_ACTIVE
Dem_out
Data_out (DATA)
12 (34)
Clock bit–check
counter
Dem_out
Data_out (DATA)
XClk
XClk
.
has elapsed. The edge-to-edge time period t
Start–up mode
XClk
t
T
DATA_min
Figure 18. Steady L state limited DATA output pattern after transmission
XClk
. This clock is also used for the
Figure 16. Synchronization of the demodulator output
t
Figure 17. Debouncing of the demodulator output
ee
Bit–check mode
ee
t
of the
ee
t
DATA_min
signal is limited to t
cient suppression of spikes at the DATA output. At the
same time it limits the maximum frequency of edges at
DATA. This eases the interrupt handling of a connected
The maximum time period for DATA to stay Low is lim-
ited to T
a finite response time in programming or switching off the
receiver via Pin DATA. T
than the maximum time period indicated by the transmit-
ter data stream. Figure 18 gives an example where
Dem_out remains Low after the receiver has switched to
receiving mode.
C.
Receiving mode
DATA_L_max
t
ee
t
ee
. This function is employed to ensure
DATA_min
T
DATA_min
DATA_L_max
t
DATA_min
. This implies an effi-
Rev. A3, 17-Dec-01
t
DATA_L_max
is thereby longer
t
ee