Manual

12
T5744
4521A–RKE–02/02
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)
Parameters
Test Conditions
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.
Basic Clock Cycle of the Digital Circuitry
Basic clock
cycle
MODE = 0 (USA)
MODE = 1 (Europe)
T
Clk
2.0697 2.0697
2.0383 2.0383 1/(f
xto
/10)
1/(f
xto
/14)
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
16.6
8.3
4.1
2.1
16.3
8.2
4.1
2.0
16.3
8.2
4.1
2.0
8
× T
Clk
4 × T
Clk
2 × T
Clk
1 × T
Clk
8 × T
Clk
4 × T
Clk
2 × T
Clk
1 × T
Clk
µs
µs
µs
µs
Start-up time
(see Figure 10
and Figure 11)
BR_Range0
BR_Range1
BR_Range2
BR_Range3
T
Startup
1855
1061
1061
663
1855
1061
1061
663
1827
1045
1045
653
1827
1045
1045
653
896.5
512.5
512.5
320.5
× T
Clk
896.5
512.5
512.5
320.5
× T
Clk
µs
µs
µs
µs
µs
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
Minimum time
period between
edges at
Pin DATA
BR_Range0
BR_Range1
BR_Range2
BR_Range3
(Figure 13)
T
DATA_min
165
83
41.4
20.7
165
83
41.4
20.7
163
81
40.7
20.4
163
81
40.7
20.4
10 ´ T
XClk
10 ´ T
XCl
10´ T
XClk
10 ´ T
XClk
10 ´ T
XClk
10 ´ T
XCl
10´ T
XClk
10 ´ T
XClk
µs
µs
µs
µs
Edge to edge
time period of
the data signal
for full
sensitivity
BR_Range0
BR_Range1
BR_Range2
BR_Range3
(Figure 10)
t
ee_sig
400
200
100
50
8479
8479
8479
8479
400
200
100
50
8350
8350
8350
8350
BR_Range
×
2 µs/T
CLK
4097 ×
T
CLK
µs
µs
µs
µs
Electrical Characteristics (continued)
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Current consumption Sleep mode (XTO active) IS
off
190 276 µA
IC active (startup-, receiving
mode) Pin DATA = H
IS
on
7.1 8.7 mA
LNA Mixer
Third-order intercept point LNA/ mixer/ IF amplifier
input matched according to
Figure 6
IIP3 -28 dBm
LO spurious emission
at RF
In
Input matched according to
Figure 6, required according to
I-ETS 300220
IS
LORF
-73 -57 dBm
Noise figure LNA and mixer
(DSB)
Input matching according to
Figure 6
NF 7 dB
LNA_IN input impedance at 433.92 MHz
at 315 MHz
Zi
LNA_IN
1.0 || 1.56
1.3 || 1.0
kW || pF
kW || pF
1 dB compression point
(LNA, mixer, IF amplifier)
Input matched according to
Figure 6, referred to RF
in
IP
1db
-40 dBm