TXM-900-HP-II Linx Technologies Inc, TXM-900-HP-II Datasheet - Page 10

• Manufacturer Part Number: TXM-900-HP-II
• Description: TRANSMITTER RF 900MHZ 8-CHANNEL
• Manufacturer: Linx Technologies Inc
• Series: HP2r

Specifications of TXM-900-HP-II

• Frequency: 902MHz ~ 928MHz
• Applications: ISM, RKE, Security and Fire Alarms
• Modulation Or Protocol: FM, FSK
• Data Rate - Maximum: 50 kbps
• Power - Output: -3dBm ~ 4dBm
• Data Interface: PCB, Through Hole
• Antenna Connector: Through Hole
• Voltage - Supply: 2.17 V ~ 16 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Current - Transmitting: -
• Other names: TXM-900-HP2; TXM-900-HP2

Figure 18: Typical Application: RS-232 Interface
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INPUTTING DIGITAL DATA
optimized for NRZ serial data that transitions from 0V to 3V (or has a 3V Pk
amplitude).
The equivalent circuit of the data input pin is shown in figure 11. An 8.2K series
resistor with a 3300pF shunt capacitor forms a low-pass filter and serves to limit
data pin.
The data input pin may be directly connected to virtually any digital peripheral
including microcontrollers, encoders, and UARTs. The data input has been
the risetimes of the incoming square waves. The designer must be careful to
ensure that this pin is driven with a low impedance to prevent changing the cutoff
frequency of the low-pass filter.
If the data input pin is driven from a 5V source (i.e., a microcontroller's UART
that is powered by 5V), the designer should put a 2.2K resistor in series with the