OPERATION GUIDE
OG_STD-601B_v40e
Circuit Design, Inc.
7
4. Terminal specifications
Terminal
No.
Terminal
name
Input/
Output
Input/Output level (V)
Internal equivalent circuit
Low
Hi
1
RF
Input/Output
-
-
RF input/ output terminal.
When in the TX mode, this terminal functions
as an RF output and when in the RX mode,
functions as an RF input.
Nominal 50 Ω.
2
GND
-
-
-
GND terminal common to RF and VCC.
The GND terminal should be connected to a
wide GND plane.
3
VCC
Input
3.0
5.0
Power supply terminal.
Connect to the reg3.0 to 5.0V DC.
4
TXSEL
Input
0 to 0.15
Vcc-0.4 to Vcc
TX select terminal. Active low.
Transmission is enabled when connecting
this terminal to GND. When this terminal is
active, set the RXSEL terminal to High or
open.
5
RXSEL
Input
0 to 0.15
Vcc-0.4 to Vcc
RX select terminal. Active low.
Reception is enabled when connecting this
terminal to GND. When this terminal is active,
set the TXSEL terminal to High or open.
6
NC
Do not connect.
7
NC
Do not connect.
