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SI4312-B10-GMR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
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.
Si4312
315/433.92 MHZ OOK RECEIVER
Features
Applications
Description
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
Single chip receiver with only six
external components
Selectable 315/433.92 MHz carrier
frequency
Supports OOK modulation
High sensitivity
(–110dBm @ 1.0kbps)
Frequency scanning
Excellent interference rejection
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
Satellite set-top box receivers
Remote controls, IR
replacement/extension
Garage and gate door openers
Home automation and security
Remote keyless entry
After market alarms
Telemetry
Wireless point of sale
Toys
Si4312
RX_IN
AGC
Antenna
LDO
VDD
GND
2.7 – 3.6 V
LNA
XTAL
OSC
RST
RATIO
ADC
ADC
PGA
DSP
MCU
BASEBAND
PROCESSOR
SQUELCH
16 MHz
FREQ
SCAN
315/434
TH[1:0]
DOUT
BT[1:0]
Patents pending
Ordering Information:
See page 15.
Pin Assignments
GND
PAD
1
2
3
17181920
11
12
13
14
6
7 8 9
4
5
16
10
15
NC
XTL2
BT0
BT1
DOUT
GNDRATIO
VDD
RST
XTL1
VDD
VDD
RFGND
RX_IN
TH0
NC
NC
TH1
GND
315/434
Si4312
(Top View)
Si4312
2 Rev. 0.5
Si4312
Rev. 0.5 3
TABLE OF CONTENTS
Section Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.1. Typical Application Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.2. Receiver Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.3. Carrier Frequency Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.4. Bit Time BT[1:0] Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.5. RATIO Selection Used for the Slicer Threshold Calculation Window . . . . . . . . . . . .10
3.6. Frequency Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.7. Threshold Hold Time Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.8. Low Noise Amplifier Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.9. Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.10. Reset Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4. Pin Descriptions: Si4312-B10-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6. Package Markings (Top Marks) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.1. Si4312 Top Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.2. Top Mark Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
7. Package Outline: Si4312-B10-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
8. PCB Land Pattern: Si4312-B10-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

SI4312-B10-GMR

Mfr. #:
Buy SI4312-B10-GMR
Manufacturer:
Silicon Labs
Description:
RF Receiver Sub-GHz receiver
Lifecycle:
New from this manufacturer.
Delivery:
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