RF31 Hope Microelectronics co., Ltd, RF31 Datasheet - Page 135

• Manufacturer Part Number: RF31
• Description: Rf31 Ism Receiver
• Manufacturer: Hope Microelectronics co., Ltd

R F 3 1
using an external clock source with no crystal, dc coupling with a nominal 0.8 VDC level is
recommended with a minimum ac amplitude of 700 mVpp.
I
Shutdown input pin. 0–V
V digital input. SDN should be = 0 in all modes except Shutdown
DD
26
SDN
mode. When SDN =1 the chip will be completely shutdown and the contents of the registers
will be lost.
GND
The exposed metal paddle on the bottom of the RF31 supplies the RF and circuit ground(s)
PKG
PADDLE_GND
for the entire chip. It is very important that a good solder connection is made between this
exposed metal paddle and the ground plane of the PCB underlying the RF31
135
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