© Copyright, RF Digital
7/10/2011 1:40 AM
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RoHS CE • ESTI
RFD21733 • FCC • IC
RFD21743 • FCC
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Tel: 949.610.0008 • www.RFdigital.com
Fast Answers: support@rfdigital.com
RFDP8
RF Module
RFD21733
RFD21735
RFD21737
RFD21738
RFD21739
RFDP8
RFDANT
RFD21742
RFD21743
RFD21772
RFD21773
KEYFOBs
Electrical Characteristics
Operating Conditions
Notes
RFDP8 M0 Pin **
Parameter
VDD Supply voltage
Supply Rise Time
Operating Temperature
Input High Voltage
Input Low Voltage
Output High Voltage (@ 0.5mA)
Output Low Voltage (@ 0.5mA)
Internal CPU Controlled Pull-Ups
Internal CPU Controlled Pull-Downs
Power Up Time – Ready to Transmit
Power Up Time – Ready to Receive
After Reset – Ready to Transmit
After Reset – Ready to Receive
Minimum
1.9V
1uS
-40°C
VDD x 0.7
VSS
VDD - 0.7V
VSS
11k ohm
11k ohm
Typical
3.0V
13k ohm
13k ohm
3mS
3mS
3mS
3mS
Maximum
3.6V
50mS
+85°C
VDD
VDD x 0.3
VDD
0.3V
16k ohm
16k ohm
** Note (RFDP8 M0 Pin) The RFDP8 Modules and RFDANTs have 3 pins used to set the mode the device will go
into after reset or power up. These pins are called M2, M1 and M0. M0 pin is the low order pin. At power up or
when the module comes out of reset, it will internally apply a 13k pull down on this pin just for an instant to check
if it is high or not. After the mode selection test, which is done just once at start up lasts just microseconds. This
is done like this to allow you to have an optional external switch to select between mode 0 and mode 1 without
drawing extra current through an external pull down resistor which would statically be there all the time.
Power Consumption
Conditions: VDD = 3.0V, TA = +25°C
Logic Transmitter
Parameter
Ultra-low power mode - background - Switch Logic Transmitter
Minimum
Typical
2uA
Maximum
UART or Switch Logic Transmitter / Receiver
Parameter
Listening - Receiving
Transmitting
Minimum
Typical
17mA
14mA
Maximum
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