I have two questions about IC numbers:
1) what is the meaning of prefixes, ie UCC, UC, SG, TL? ( for example SG2524 or UCC2813 )
2) what is the meaning of digits after prefixes? some ICs have for digit after the prefix and some others have five. ( eg UC28025 or UCC28950 )
Best Regards, Ras
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In reply to Colin Gillmor:
Hi Colin Gillmor, thank you for the reply. i have two questions: 1) how do i know the year of product development to select new products? 2) when i use the selection tool, ( after filtering/focusing in my search, ) i reach a lot of similar choices for a special application. how can i have a good selection between them? for example in pwm controllers there are several products for flyback. Regards, Ras
In reply to Ras Sharif50:
Hello Ras,Here is some more insight from a former Unitrode employee.
UC bipolar Unitrode device.UCC bicmos Unitrode deviceUCD = Unitrode branded digital controlSG Silicon General prefix used by many suppliers of PWM’s
TL Texas Instruments LinearTLC TI Linear BiCmos
The other digits are all part of a general part numbering scheme for a device family.Example, when a 4 digit device family needs expanding a 5th number is many times added UCC2895 to UCC28950 newer phase shift pwm.
Some devices are many decades old so the numbers after the prefix has imbedding meanings.UC1xxxx UCC1xxxx indicates a military tempUC2 UCC2 indicates industrial temp, SG2 also indicates industrial temp I believe.UC3 UCC3 indicates commercial temp
No newUC bipolar devices are being made.UCC new devices are all UCC2 industrial temp by default, mil specs have suffixes added.
There are more variations I surely have missed, but I hope this helps your understanding.
Ed WalkerTexas Instruments Online Support - Systems & Tools
In reply to EdWalker:
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