T5744N-TK Atmel, T5744N-TK Datasheet - Page 10

• Manufacturer Part Number: T5744N-TK
• Description: IC RCVR300-450MHZ UHF ASK 20SSOP
• Manufacturer: Atmel

Specifications of T5744N-TK

• Frequency: 300MHz ~ 450MHz
• Sensitivity: -108dBm
• Modulation Or Protocol: ASK
• Applications: General Purpose Data Transmission Systems
• Current - Receiving: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Data Rate - Maximum: -
• Other names: T5744-TKS; T5744-TKS

Figure 10. Enable Timing (1)
Figure 11. Enable Timing (2)
Digital Signal
Processing
10
ENABLE
ENABLE
Dem_out
Dem_out
DATA
DATA
T5744
Sleep mode
Sleep mode
I
S
I
S
= I
= I
Soff
The data from the ASK demodulator (Dem_out) is digitally processed in different ways
and as a result converted into the output signal DATA. This processing depends on the
selected baudrate range (BR_Range). Figure 12 illustrates how Dem_out is synchro-
nized by the extended basic clock cycle T
has elapsed. The edge-to-edge time period tee_sig of the DATA signal as a result is
always an integral multiple of T
The minimum time period between two edges of the data signal is limited to tee_sig ³
TDATA_min. This implies an efficient 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 microcontroller.
Soff
Start-up mode
Start-up mode
I
S
I
T
T
S
= I
Start-up
= I
Start-up
Son
Son
XClk
.
XClk
. Data can change its state only after T
Receiving mode
Receiving mode
I
S
I
S
= I
= I
Son
Son
t
t
ee_sig
ee_sig
4521B–RKE–01/03
XClk