SI4720-B20 Datasheet, PDF (43/48 Pages) Silicon Laboratories – BROADCAST FM RADIO TRANSCEIVER FOR PORTABLE APPLICATIONS

Si4720/21-B20
9. Package Markings (Top Marks)
9.1. Top Mark Explanation
Mark Method:
YAG Laser
Line 1 Marking:
Part Number
20 = Si4720; 21 = Si4721
Firmware Revision
20 = Firmware Revision 2.0
Line 2 Marking:
Die Revision
B = Revision B Die
TTT = Internal Code
Internal tracking code.
Line 3 Marking:
Circle = 0.5 mm Diameter Pin 1 Identifier
(Bottom-Left Justified)
Y = Year
WW = ‘Workweek
Assigned by the Assembly House. Corresponds to the last
significant digit of the year and workweek of the mold date.
9.2. Si4720/21 Top Mark
9.3. Si4721 Top Mark
Rev. 1.0
43