SI4820-A10 Datasheet, PDF (13/20 Pages) Silicon Laboratories – BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER

5. Pin Descriptions: Si4820/24-A10
Si4820/24-A10
LNA_EN
1
NC
2
TUNE1
3
TUNE2
4
BAND
5
NC
6
NC
7
FMI
8
RFGND
9
NC
10
NC
11
AMI
12
24
AOUT
23
NC
22
DBYP
21
VDD2
20
VDD1
19
XTALI
18
XTALO
17
VOL-
16
VOL+
15
RST
14
GND
13
GND
Pin Number(s)
1
2
3
4
5
6,7
8
9
10,11
12
13,14
15
16
17
18
19
20
21
22
23
24
Name
LNA_EN
NC
TUNE1
TUNE2
BAND
NC
FMI
RFGND
NC
AMI
GND
RST
VOL+
VOL–
XTALO
XTALI
VDD1
VDD2
DBYP
NC
AOUT
Description
Enable SW external LNA for Si4824
No connect
Frequency tuning
Frequency tuning
Band selection and de-emphasis selection
No connect. Leave floating.
FM RF inputs. FMI should be connected to the antenna trace.
RF ground. Connect to ground plane on PCB.
Unused. Tie these pins to GND.
AM RF input. AMI should be connected to the AM antenna.
Ground. Connect to ground plane on PCB.
Device reset (active low) input
Volume button up
Volume button down
Crystal oscillator output
Crystal oscillator input
Supply voltage. May be connected directly to battery.
Supply voltage. May be connected directly to battery.
Dedicated bypass for VDD
No connect. Leave floating
Audio output
Rev. 1.0
13