CB-OBS411X-04-0 ConnectBlue, CB-OBS411X-04-0 Datasheet - Page 39

• Manufacturer Part Number: CB-OBS411X-04-0
• Description: BLUETOOTH V2.1+EDR MODULE 4DBM
• Manufacturer: ConnectBlue

Specifications of CB-OBS411X-04-0

• Frequency: 2.4GHz
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: Bluetooth v2.1+EDR, Class 2 & 3
• Applications: General Purpose
• Power - Output: 4dBm
• Sensitivity: -84dBm
• Voltage - Supply: 3 V ~ 6 V
• Current - Receiving: 15.5mA
• Current - Transmitting: 25.1mA
• Data Interface: Solder Pads, 2 x 20mm, 1 mm pitch
• Antenna Connector: U.FL
• Operating Temperature: -30°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 809-1034

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Figure 25: No restore switch used but a green LED in a 5V host system. The status of the signal can also be used as input to a
host controller.
A serial resistor to the restore switch must be used to prevent a short circuit when the GREEN/Switch-1 pin is in output HIGH state and
the switch is pressed (see Figure 26).
Sometimes, over time, switch contacts can get an oxide layer. This may cause the closed switch resistance to become too high to sink
the signal to logic LOW because the signal is internally pulled-up (see
Figure 27. The GREEN/Switch-1 pin can be left unconnected if none of its functionality is required.
Figure 26: A low resistance restore switch used. Notice the 1kOhm serial resistor.
Figure 27: If the resistance in the switch is not guaranteed to be low enough, a safer design can be used. Notice the 1kOhm
serial resistor.
Input/Output signals
). A design that prevents this can be found in
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