R31DS0038EU0204 Rev.2.04

Page 9

Aug 14, 2026

551S Datasheet

2.6

Test Load and Circuit

3. Package Outline Drawings

The package outline drawings are located at the end of this document and are accessible from the Renesas

website (see Ordering Information for package links). The package information is the most current data available

and is subject to change without revision of this document.

4. Marking Diagrams

Rs=33ohm

5 inches

CL = 5pF

50ohms

8-SOIC

8-DFN

8-TSSOP

▪ Lines 1, 2, and 3: part number.

▪ Line 4:

• “YYWW” are the last digits of the year and week that the part was

assembled.

• “$” denotes the mark code.

• “#” denotes stepping number.

▪ Line 1: truncated part number.

▪ Line 2:

• “YW” are the last digit of the year and week that the part was

assembled.

• “**” denotes the lot sequence.

• “#” denotes stepping number.

▪ Lines 1 and 2: part number.

▪ Line 3:

• “#” denotes the stepping number.

• “YYWW” are the last digits of the year and week that the part was

assembled.

• “$” denotes the mark code.

• “#” denotes stepping number.