SI4312 Datasheet, PDF (1/22 Pages) Silicon Laboratories – 315/433.92 MHZ OOK RECEIVER

Si4312
315/433.92 MHZ OOK RECEIVER
Features
 Single chip receiver with only six
external components
 Selectable 315/433.92 MHz carrier
frequency
 Supports OOK modulation
 High sensitivity
(–110 dBm @ 1.0 kbps)
 Frequency scanning
 Excellent interference rejection
Applications
 Satellite set-top box receivers
 Remote controls, IR
replacement/extension
 Garage and gate door openers
 Home automation and security
Description
 Data rates up to 10 kbps NRZ
(5 kbps Manchester)
 Direct battery operation with on-
chip low drop out (LDO) voltage
regulator
 16 MHz crystal oscillator support
 3x3x0.85 mm 20L QFN package
(RoHS compliant)
 –40 to +85 °C temperature range
 Remote keyless entry
 After market alarms
 Telemetry
 Wireless point of sale
 Toys
The Si4312 is a fully-integrated OOK 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 Si4312 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 15.
Pin Assignments
Si4312
(Top View)
VDD 1 ^{20 19 18 17} 16
RFGND 2
15 BT0
RX_IN 3
RST 4
GND
PAD
14 BT1
13 DOUT
RATIO 5
12 GND
6 _{7 8 9 10} 11 VDD
Antenna
RX_IN
2.7 – 3.6 V VDD
GND
LNA
AGC
LDO
PGA
FREQ
SCAN
ADC
ADC
XTAL
OSC
Si4312
DOUT
DSP
MCU
BASEBAND
PROCESSOR
SQUELCH
RATIO
315/434
TH[1:0]
BT[1:0]
RST
Patents pending
16 MHz
Rev. 0.5 3/10
Copyright © 2010 by Silicon Laboratories
Si4312
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.