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Power
Telos may be powered by two AA batteries. The module was designed to fit the two AA battery
form factor. AA cells may be used in the operating range of 2.1 to 3.6V DC, however the
voltage must be at least 2.7V when programming the microcontroller flash or external flash.
If the Telos module is plugged into the USB port for programming or communication, it will
receive power from the host computer. The mote operating voltage when attached to USB is
3V. If Telos will always be attached to a USB port, no battery pack is necessary.
The 16-pin expansion connector (described in the Section on page 19) can provide power to the
module. Any of the battery terminal connections may also provide power to the module. At no
point should the input voltage exceed 3.6V—doing so may damage the microcontroller, radio, or
other components.
Typical Operating Conditions
Supply voltage
Supply voltage during flash memory programming
Operating free air temperature
Current Consumption: MCU on, Radio RX
Current Consumption: MCU on, Radio TX
Current Consumption: MCU on, Radio off
Current Consumption: MCU idle, Radio off
Current Consumption: MCU standby
Moteiv Corporation
Caution!
ESD
Precaution should be used when handling
the device in order to prevent permanent
damage.
Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004)
Rev B (Low Power Wireless Sensor Module)
MIN
NOM
2.1
2.7
-40
21.8
19.5
1800
54.5
5.1
sensitive
device.
Telos
MAX
UNIT
3.6
V
3.6
V
o
85
C
23
mA
21
mA
2400
µA
1200
µA
21.0
µA
Page 4 of 28
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