SI4311 Datasheet, PDF (1/20 Pages) Silicon Laboratories – 315/433.92 MHZ FSK RECEIVER

Si4311
315/433.92 MHZ FSK RECEIVER
Features
 Single chip receiver with only six
 Data rates up to 10 kbps
external components
 Direct battery operation with on-
 Selectable 315/433.92 MHz carrier
chip low drop out (LDO) voltage
frequency
regulator
 Supports FSK modulation
 16 MHz crystal oscillator support
 High sensitivity (–104 dBm @ 5 kbps)  3x3x0.85 mm 20L QFN package
 Excellent interference rejection
(RoHS compliant)
 Selectable IF bandwidths
 –40 to +85 °C temperature range
 Automatic Frequency Centering (AFC)
Applications
 Satellite set-top box receivers
 Remote controls, IR
replacement/extension
 Garage and gate door openers
 Home automation and security
Description
 Remote keyless entry
 After market alarms
 Telemetry
 Wireless point of sale
 Toys
The Si4311 is a fully-integrated FSK CMOS RF receiver that operates in the
unlicensed 315 and 433.92 MHz ultra high frequency (UHF) bands. It is designed
for high-volume, cost-sensitive RF receiver applications, such as set-top box RF
receivers, remote controls, garage door openers, home automation, security,
remote keyless entry systems, wireless POS, and telemetry. The Si4311 offers
industry-leading RF performance, high integration, flexibility, low BOM, small
board area, and ease of design. No production alignment is necessary as all RF
functions are integrated into the device.
Functional Block Diagram
Ordering Information:
See page 14.
Pin Assignments
Si4311
(Top View)
VDD 1 ^{20 19 18 17} 16
RFGND 2
15 BT0
RX_IN 3
RST 4
GND
PAD
14 BT1
13 DOUT
AFC 5
12 GND
6 _{7 8 9 10} 11 VDD
Antenna
RX_IN
2.7 – 3.6 V VDD
GND
LNA
AGC
LDO
Si4311
ADC
DOUT
PGA
DSP
MCU
ADC
BASEBAND
AFC
315/434
PROCESSOR
DEV[1:0]
SQUELCH
BT[1:0]
AFC
XTAL
OSC
RST
Patents pending
16 MHz
Rev. 0.5 3/10
Copyright © 2010 by Silicon Laboratories
Si4311
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.