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Si4770/77-A20
H I G H - P ERFORMANCE C ONSUMER E LECTRONICS
B ROADCAST R ADIO R ECEIVER A N D HD R ADIO T UNER
Features
?
Worldwide FM band support
(64–108 MHz)
?
?
AM/FM hi-cut control
AM lo-cut filter
?
?
?
?
?
?
Worldwide AM band support
(520–1710 kHz)
AM/FM HD Radio support
(Si4777 only)
Comprehensive signal quality
metrics: RSSI, SNR, multipath
interference, frequency offset,
adjacent channel RSSI,
frequency deviation, and image
RSSI
Advanced patented RDS soft-
decision decoder
Advanced, patented FM channel
equalizer for multipath
interference
Dynamic AM/FM channel
?
?
?
?
?
?
?
?
L/R analog and digital (I 2 S) audio
outputs
Digital Low-IF architecture
Frequency synthesizer with fully
integrated PLL-VCO
Fully integrated AM/FM front-end
including high performance LNA,
AGC with integrated resistor and
capacitor banks, and RF and IF
peak detectors
Integrated crystal oscillator
Digital (I 2 S) Zero-IF AM/FM I/Q
outputs (Si4777 only)
1.2 to 5 V power supplies
QFN 40-pin, 6x6x0.85 mm
Ordering Information:
See page 49.
Pin Assignments
Si4770/77-A20
?
?
bandwidth control
Programmable AM/FM soft mute
FM stereo-mono blend
?? Pb-free/RoHS
compliant
NC
FMXIP
FMXIN
RFGND
1
2
3
4
30
29
28
27
NC/BLEND
DCLK
DFS
DOUT
?
FM hi-blend control
RFREG
FMO
5
6
GND PAD
26
25
NC/QOUT
NC/IOUT
FMI
7
24
NC/IQFS
Applications
NC
NC
8
9
23
22
NC/IQCLK
VIO2
?
Audio/video receivers
?
Boom boxes
AMI
10
21
DBYP
?
Consumer electronics
?
Home theater systems
Description
The Si4770/77-A20 broadcast receiver and HD Radio tuner (Si4777 only)
employs an advanced, proven digital low-IF architecture to bring
outstanding receiver performance to high-performance consumer
electronics.
Patents pending
Rev. 0.9 6/12
Copyright ? 2012 by Silicon Laboratories
Si4770/77-A20
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
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