When looking at Texas Instruments Part LM358DR there is a lot of questions on the different suffixes. LM358DR , LM358DRE4, LM358DRG3 and LM358DRG4.
The different suffixes on these part numbers are calling out different RoHS and environmental information on these parts. The “E” would be calling out RoHS compliant and “G” is calling out Green (RoHS-compliant and no Br/Sb)
One note on TI parts is that lead based parts such as the LM358DR are backwards compatible so both parts LM358DR and LM358DRE4 will be RoHS compatible, the E4 would be indicating there is a difference in the lead finish.
So while all four parts in this example will be RoHS compliant you will see slight difference in the lead finish.
LM358DR lead finish would be CU NIPDAU | CU SN
LM358DRE4 lead finish would be CU NIPDAU
LM358DRG3 lead finish would be CU SN
LM358DRG4 lead finish would be CU NIPDAU
I would also note however if this was a BGA-based device this would not be true as only the part numbers with a unique part designation would be RoHS compliant. On the BGA-based devices TI uses a “Z” to signify the part would have Pb-Free solder balls. An example would be leaded part number OPA2347YEDR and RoHS compliant part number OPA2347YZDR.
For more information on orderable part numbers please refer to pages 34-38 of the datasheet.
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Suffix and Availability Update
Historically G4 and E4 suffixes meant “Green” or “Lead Free”. These standards have been phased in to most products TI currently offers, meaning a part without a G4 suffix would still be Green and Lead Free, and is the same physical part as the G4 equivalent offering.
As RoHS and Green offerings became standard in most parts, G4, or potentially E4 suffixes for a period of time were often still listed available for customers that needed a consistent orderable part number.
Texas Instruments G4 vs. no G4 suffix
Currently there is no difference between a part numbers for example:
SN74xxG4 and SN74xx
Due to this standardization, TI has recently been in the process of slowly phasing the environmental code suffix out of the manufacturer’s part number. Going forward G4 / E4 markings are still included on the physical part marking and on the manufacturer’s label to the left of the 2D bar code but will not be included at the end of the manufacturer’s part number on the label.
To avoid manufacturer lead times it is often advisable to order the DigiKey stocking Non-G4 suffix.
This is a summary of information TI has provided that can be found at the following FAQ:
Logic forum - Logic - TI E2E support forums suffix
For further information on what the G4/E4 suffixes mean can be found here:
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