Atmel ATA3741 Series, Operating

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23
4899B–RKE–10/06
ATA3741
6. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters Symbol Min. Max. Unit
Supply voltage V
S
6 V
Power dissipation P
tot
450 mW
Junction temperature T
j
150 °C
Storage temperature T
stg
–55 +125 °C
Ambient temperature T
amb
–40 +105 °C
Maximum input level, input matched to 50
Ω
P
in_max
10 dBm
7. Thermal Resistance
Parameters Symbol Value Unit
Junction ambient R
thJA
100 K/W
8. Electrical Characteristics
All parameters refer to GND, T
amb
= –40°C to +105°C, V
S
= 4.5V to 5.5V, f
0
= 433.92 MHz and f
0
= 315 MHz, unless otherwise specified.
(V
S
= 5V, 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 X
Sleep
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
3.5 / f
Sig
6.5 / f
Sig
9.5 / f
Sig
ms
ms
ms
ms