SI4421-A1-FT Silicon Laboratories Inc, SI4421-A1-FT Datasheet - Page 41

• Manufacturer Part Number: SI4421-A1-FT
• Description: IC TXRX FSK 915MHZ 3.8V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4421-A1-FT

• Package / Case: 16-TSSOP
• Frequency: 433MHz, 868MHz, 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK
• Power - Output: 7dbm
• Sensitivity: -110dBm
• Voltage - Supply: 2.2 V ~ 3.6 V
• Current - Receiving: 15mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 2
• Number Of Transmitters: 2
• Wireless Frequency: 433 MHz to 915 MHz
• Interface Type: SPI
• Output Power: 5 dBm to 7 dBm
• Operating Supply Voltage: 2.2 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 25 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1631-5

Evaluation Board with Resonant PCB Antenna (BIFA)
Schematics
Note: Components R5 to R8 and C6 are needed for connection to the ISM Chipset Development Kit load board (IA ISM-DK3) and are
Frequency Dependent Component Values
Dual (868/915 MHz)
SDI
SCK
SEL
DATA
VDI
CLKIN
DATA
DCLK
DATA
not necessary in an application.
868 MHz
915 MHz
Band
R6
R7
R8
10k
100k
10k
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
1
3
5
7
9
CS1
CON40-0
GND
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
C3 [pF]
47/33
47
33
C3
*
L1 [nH]
DTO
VDI
RESET
DCLK
IRQ
SDO
22
18
15
C2
10nF
GND
C1
2.2uF
DTO
GND
SDI
SCK
SEL
SDO
IRQ
DATA
DCLK
C6
100pF
R5
10k
TP3
TP1
1
2
3
4
5
6
7
8
IC1
SDI
SCK
NSEL
SDO
NIRQ
FSK/DATA/NFFS
DCLK/CFIL
CLK
IA4421
NINT/VDI
XTL/REF
ARSSI
NRES
VDD
VSS
RF1
RF2
16
15
14
13
12
11
10
9
GND
VDI
ARSSI
RESET
CLKIN
* See values in the table
GND
L1
1
2
3
*
JP1
Si4421
41