u3742bm ATMEL Corporation, u3742bm Datasheet - Page 24

• Manufacturer Part Number: u3742bm
• Description: Uhf Ask/fsk Receiver
• Manufacturer: ATMEL Corporation

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.
Thermal Resistance
24
Parameters
Power dissipation
Junction temperature
Storage temperature
Ambient temperature
Maximum input level, input matched to 50 W
Parameters
Junction ambient
U3742BM
During programming, the LNA, LO, low-pass filter, IF-amplifier and the FSK/ASK
Manchester demodulator are disabled.
The programming start pulse t
If bit 1 is set to '1', it represents the OFF-command to set the receiver back to polling
mode at the same time. For the length of the programming start pulse t
convention should be considered:
•
Programming (respectively OFF-command) is initiated if the receiver is not in reset
mode. If the receiver is in reset mode, programming (respectively Off-command) is not
initiated, and the reset marker RM is still present at pin DATA.
This period is generally used to switch the receiver to polling mode. In a reset condition,
RM is not canceled by accident.
•
Programming (respectively OFF-command) is initiated in any case. RM is canceled if
present.
This period is used if the connected microcontroller detected RM. If a configuration reg-
ister is programmed, this time period for t
capacitive load at pin DATA is limited. The resulting time constant t together with an
optional external pull-up resistor may not be exceeded to ensure proper operation.
t
BR_Range]
t
1
1
(min) < t
> 5632 ´ T
1
< 1535 ´ T
Symbol
Symbol
Clk
P
R
T
T
in_max
P
T
amb
thJA
stg
tot
j
Clk
: [t
1
1
initiates the programming of the configuration registers.
(min) is the minimum specified value for the relevant
Min.
-55
-40
1
Value
100
can generally be used. Note that the
Max.
+125
+105
450
150
10
1
, the following
4735A–RKE–11/03
dBm
Unit
Unit
K/W
mW
° C
° C
° C