U3742bm, Electrical characteristics – Rainbow Electronics U3742BM User Manual
Page 25
25
U3742BM
4735A–RKE–11/03
Electrical Characteristics
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 other-
wise specified. (V
S
= 5 V, T
amb
= 25
°
C)
Parameter
Test Condition
Symbol
6.76438 Mhz Oscillator
(Mode 1)
4.90625 Mhz Oscillator
(Mode 0)
Variable Oscillator
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Basic Clock Cycle of the Digital Circuitry
Basic clock
cycle
MODE = 0 (USA)
MODE = 1 (Europe)
T
Clk
2.0697
2.0383
1/(f
XTO
/10)
1/(f
XTO
/14)
µs
µs
Extended
basic clock
cycle
BR_Range0
BR_Range1
BR_Range2
BR_Range3
T
XClk
16.6
8.3
4.1
2.1
16.3
8.2
4.1
2.0
8
´
T
Clk
4
´
T
Clk
2
´
T
Clk
1
´
T
Clk
µs
µs
µs
µs
Polling Mode
Sleep time
Sleep and XSleep
are defined in the
OPMODE register
T
Sleep
Sleep
´
X
Sleep
´
1024
´
2.0697
Sleep
´
X
Sleep
´
1024
´
2.0383
Sleep
´
X
Sleep
´
1024
´
T
Clk
ms
Start-up time
BR_Range0
BR_Range1
BR_Range2
BR_Range3
T
Startup
1855
1061
1061
663
1827
1045
1045
653
896.5
512.5
512.5
320.5
´
T
Clk
µs
µs
µs
µs
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/f
Sig
6/f
Sig
9/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 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 19 on
page 17)
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