NRF401 Datasheet, PDF (2/18 Pages) List of Unclassifed Manufacturers – 433MHz Single Chip RF Transceiver

PRODUCT SPECIFICATION
nRF401 Single Chip RF Transceiver
BLOCK DIAGRAM
DOUT
10
TXEN
19
CS
12
DIN
9
PWR_UP
18
DEM
OSC
1
20
PLL
4
VCO
5
6
LNA
PA
11
16
ANT1
ANT2
15
VCO
INDUCTOR
RF_PWR
REFERENCE
LOOP
FILTER
Figure 1. nRF401 block diagram with external components.
PIN FUNCTIONS
Pin Name
Pin function
1 XC1
2 VDD
3 VSS
4 FILT1
5 VCO1
6 VCO2
7 VSS
8 VDD
9 DIN
10 DOUT
11 RF_PWR
12 CS
Input
Power
Ground
Input
Input
Input
Ground
Power
Input
Output
Input
Input
13 VDD
14 VSS
15 ANT2
16 ANT1
17 VSS
18 PWR_UP
Power
Ground
Input/Output
Input/Output
Ground
Input
19 TXEN
Input
20 XC2
Output
Description
Crystal oscillator input
Power supply (+3-5V DC)
Ground (0V)
Loop filter
External inductor for VCO
External inductor for VCO
Ground (0V)
Power supply (+3-5V DC)
Data input
Data output
Transmit power setting
Channel selection
CS=“0” ⇒ 433.92MHz (Channel#1)
CS=“1” ⇒ 434.33MHz (Channel#2)
Power supply (+3-5V DC)
Ground (0V)
Antenna terminal
Antenna terminal
Ground (0V)
Power on/off
PWR_UP = “1” ⇒ Power up (Operating mode)
PWR_UP = “0” ⇒ Power down (Standby mode)
Transmit enable
TXEN = “1” ⇒ Transmit mode
TXEN = “0” ⇒ Receive mode
Crystal oscillator output
Table 3. nRF401 pin functions.
Nordic VLSI ASA -
Revision: 1.5
Vestre Rosten 81, N-7075 Tiller, Norway -
Page 2 of 18
Phone [phone] - Fax [phone]
May 2000