Manual

24
U3741BM
4662B–RKE–10/04
Receiving Mode
Intermediate
frequency
MODE=0 (USA)
MODE=1 (Europe)
f
IF
1.0 1.0
f
XTO
× 64/314
f
XTO
× 64/432.92
MHz
MHz
Baud rate
range
BR_Range0
BR_Range1
BR_Range2
BR_Range3
BR_Range
1.0
1.8
3.2
5.6
1.8
3.2
5.6
10.0
1.0
1.8
3.2
5.6
1.8
3.2
5.6
10.0
BR_Range0 × 2 µs/T
Clk
BR_Range1 × 2 µs/T
Clk
BR_Range2 × 2 µs/T
Clk
BR_Range3 × 2 µs/T
Clk
kBaud
kBaud
kBaud
kBaud
Minimum time
period
between
edges at
pin DATA
(Figure 15)
BR_Range0
BR_Range1
BR_Range2
BR_Range3
T
DATA_min
tmin1
tmin2
tmin1
tmin2
tmin1
tmin2
tmin1
tmin2
149
182
75
91
37.3
45.5
18.6
22.8
147
179
73
90
36.7
44.8
18.3
22.4
9 × T
XClk
11 × T
XCl
9 × T
XClk
11 × T
XClk
9 × T
XClk
11 × T
XClk
9 × T
XClk
11 × T
XClk
µs
µs
µs
µs
µs
µs
µs
µs
Maximum low
period at DATA
(Figure 16)
BR_Range0
BR_Range1
BR_Range2
BR_Range3
T
DATA_L_max
2169
1085
542
271
2136
1068
534
267
131 × T
XClk
131 × T
XClk
131 × T
XClk
131 × T
XClk
µs
µs
µs
µs
OFF
command at
pin ENABLE
(Figure 18)
t
Doze
3.1 3.05
1.5 ¥
T
Clk
µs
Configuration of the Receiver
Frequency of
the reset
marker
(Figure 19)
f
RM
117.9 119.8 Hz
Programming
start pulse
(Figure 17,
Figure 20)
BR_Range0
BR_Range1
BR_Range2
BR_Range3
after POR
t1
2188
1104
561
290
11656
3176
3176
3176
3176
2155
1087
553
286
11479
3128
3128
3128
3128
1057 ×
T
Clk
533 ×
T
Clk
271 ×
T
Clk
140 ×
T
Clk
5632 ×
T
Clk
1535 ×
T
Clk
1535 ×
T
Clk
1535 ×
T
Clk
1535 ×
T
Clk
µs
Programming
delay period
(Figure 17,
Figure 20)
t2 795 798 783 786
384.5 ×
T
Clk
385.5
× T
Clk
µs
Synchroni-
zation pulse
(Figure 17,
Figure 20)
t3 265 261 128 × T
Clk
µs
Electrical Characteristics (Continued)
All parameters refer to GND, T
amb
= -40°C to +105°C, V
S
= 4.5 V to 5.5 V, f
0
= 433.92 MHz and f
0
= 315 MHz, unless otherwise specified.
(V
S
= 5 V, T
amb
= 25°C)
Parameter Test Condition Symbol
6.76438-Mhz Osc.
(Mode 1)
4.90625-Mhz Osc.
(Mode 0) Variable Oscillator
UnitMin. Typ. Max. Min. Typ. Max. Min. Typ. Max.
1
4096 T
CLK
×
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