U3745bm, Electrical characteristics – Rainbow Electronics U3745BM User Manual
Page 26
26
U3745BM
4663A–RKE–06/03
Time for Bit
check
Average bit check
time while polling
BR_Range0
BR_Range1
BR_Range2
BR_Range3
T
Bitcheck
0.45
0.24
0.14
0.14
0.47
0.26
0.16
0.15
ms
ms
ms
ms
Bit check time for a
valid input signal
f
Sig
N
Bitcheck
= 0
N
Bitcheck
= 3
N
Bitcheck
= 6
N
Bitcheck
= 9
T
Bitcheck
3/f
Sig
6/f
Sig
9/f
Sig
3.5/f
Sig
6.5/f
Sig
9.5/f
Sig
3/f
Sig
6/f
Sig
9/f
Sig
3.5/f
Sig
6.5/f
Sig
9.5/f
Sig
T
XClk
3.5/f
Sig
6.5/f
Sig
9.5/f
Sig
ms
ms
ms
ms
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 ms / T
Clk
BR_Range1
´
2 ms / T
Clk
BR_Range2
´
2 ms / T
Clk
BR_Range3
´
2 ms / T
Clk
kBaud
kBaud
kBaud
kBaud
Minimum time
period
between
edges at
Pin DATA
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
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
t
Doze
3.1
3.05
1.5
´
T
Clk
µs
Configuration of the Receiver
Frequency of
the reset
marker
f
RM
117.9
119.8
Hz
Electrical Characteristics
All parameters refer to GND, V
S
= 5 V, T
amb
= 25
°
C, f
0
= 433.92 MHz and f
0
= 315 MHz, unless otherwise specified. The
possible operating range refer to different circuit conditions: V
S
= 4.5 V to 5.5 V, T
amb
= -40
°
C to +85
°
C
Parameter
Test Condition
Symbol
6.76438-Mhz Osc.
(Mode 1)
4.90625-Mhz Osc.
(Mode 0)
Variable Oscillator
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
1
4096
T
CLK
´
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