CB-OBS433X-02-0 ConnectBlue, CB-OBS433X-02-0 Datasheet - Page 40

• Manufacturer Part Number: CB-OBS433X-02-0
• Description: SERIAL PORT ADAPTER U.FL
• Manufacturer: ConnectBlue

Specifications of CB-OBS433X-02-0

• Frequency: 2.402GHz ~ 2.48GHz
• Modulation Or Protocol: Bluetoothv2.1+EDR
• Applications: General Purpose
• Power - Output: 17dBm
• Sensitivity: -94dBm
• Voltage - Supply: 3.3 V ~ 6 V
• Current - Receiving: 200mA
• Current - Transmitting: 200mA
• Data Interface: Connector, 2 x 10 Header, 2 mm Pitch
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 809-1039

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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.
Switch-0 is used for the external connect function. A secondary function is that the module will restore all factory settings if both the
Switch-1 and Switch-0 signals are low during start up. See the Serial Port Adapter AT Commands specification for more details.
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 29.
Figure 28: A low resistance function switch used.
Figure 29: If the resistance in the switch is not guaranteed to be low enough, a safer design can be used.
The Switch-0 pin can be left unconnected if its functionality is not used.
10.2.3.4 Switch-0 Signal
Input/Output signals
). A design that prevents this can be found in
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