T5743 Ver la hoja de datos (PDF) - Atmel Corporation
Número de pieza
componentes Descripción
Fabricante
T5743 Datasheet PDF : 41 Pages
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T5743
Programming respectively OFF-command is initiated in any case. The registers
OPMODE and LIMIT are set to the default values. RM is cancelled if present.
This period is used if the connected microcontroller detected RM. If the receiver oper-
ates in default mode, this time period for t1 can generally be used.
Note that the capacitive load at Pin DATA is limited.
Data Interface
The data interface (see Figure 34) is designed for automotive requirements. It can be
connected via the pull-up resistor Rpup up to 20 V and is short-circuit-protected.
The applicable pull-up resistor Rpup depends on the load capacity CL at Pin DATA and
the selected BR_range (see Table 13). More detailed information about the calculation
of the maximum load capacity at Pin DATA is given in the “Application Hints U3743BM”.
Table 13. Applicable Rpup
CL £ 1 nF
CL £ 100 pF
BR_range
B0
B1
B2
B3
B0
B1
B2
B3
Applicable Rpup
1.6 kW to 47 kW
1.6 kW to 22 kW
1.6 kW to 12 kW
1.6 kW to 5.6 kW
1.6 kW to 470 kW
1.6 kW to 220 kW
1.6 kW to 120 kW
1.6 kW to 56 kW
Figure 35. Application Circuit: fRF = 433.92 MHz without SAW Filter
VS
GND
C7
2.2u
10%
C6
10n
10%
R2
56k to 150k
C14
33n 5%
C13
10n
10%
C3
15p
5%
np0
T5743
1
2
3
4
5
6
SENS
DATA
IC_ACTIVE POLLING/_ON
CDEM
DGND
DATA_CLK
AVCC
MODE
20
19
18
17
16
TEST
AGND
DVCC 15
7 MIXVCC
XTO 14
8
9
10
LNAGND
LNA_IN
NC
LFGND
LF
LFVCC
13
12
11
C12
C15
150p
10%
10n
10%
R3
>= 1.6k
IC_ACTIVE
Sensitivity reduction
V X = 5 V to 20 V
DATA
POLLING/_ON
DATA_CLK
Q1
C11
6.7643MHz
12p
2% np0
C8
150p
10%
COAX
C17
3.3p
5% np0
C16
100p
5% np0
L2 TOKO LL2012 F22NJ
22n
5%
R1
820
5%
C9
4.7n
C10
5%
1n
5%
29
4569A–RKE–12/02
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