SI4455 Datasheet, PDF (39/40 Pages) Silicon Laboratories – 20-Pin 3x3 mm QFN package

Si4455
DOCUMENT CHANGE LIST
Revision 1.0 to Revision 1.1
 Removed API section and updated references to
EZRadio API documentation in various sections to
reflect the latest revision.
 Changed references to EZConfig Setup to Radio
Configuration Application (RCA) in various sections.
 Updated " Functional Block Diagram" on page 2.
Removed Vdd connection to PA
 Updated Table 3, “Synthesizer AC Electrical
Characteristics¹,” on page 5.
Removed Synthesizer settling time (covered in
state transition timing in Table 12).
 Updated Table 4, “Receiver AC Electrical
Characteristics¹,” on page 6.
Changed Image Rejection and Spurious
emissions spec
Added footnote to highlight that emissions are
layout-dependent and not only an IC specification.
 Updated Table 5, “Transmitter AC Electrical
Characteristics¹,” on page 7.
Changed Emissions and Harmonics from Max to
Typical specs.
Added footnote to highlight that emissions are
layout dependent and not only an IC specification.
 Updated Table 7 on page 9.
Changed Rise and Fall time test conditions.
Updated Drive Strength levels.
 Updated Table 8 on page 10.
Updated Junction Temperature spec.
 Updated "1.1. Definition of Test Conditions" on page
11.
Added comments
 Updated "3.2.1. Received Signal Strength Indicator"
on page 14.
Updated RSSI description.
 Updated Figure 5 on page 18.
 Updated Figure 7 on page 21.
 Updated Table 11 on page 22.
Changed SDN to SDI.
 Updated "5.3. Interrupts" on page 29.
Added Interrupt options.
 Section "5.4. GPIO" on page 30.
Updated Table 14 to include SCLK and NSEL.
 Updated "6. Data Handling and Packet Handler" on
page 31.
 Added "6.3. Direct Mode" on page 31.
 Updated "7. Pin Descriptions" on page 32.
Updated XIN pin description and added ground
paddle description.
 Updated Figure 19 on page 37 to show top view of
the package.
Rev 1.1
39