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Texas Instruments Chip Markings

Identification Number

Logic Chips

 

AA 999999 B – CC

 

AA is Prefix:

BL    –  Beam Lead

RSN –  Radiation Hardened

SN    –  Standard

SNR –  High Reliability without group B & C

SNT –   High Reliability with group B & C

SNX –  Experimental Circuit

999999 is part number (3 to 6 characters, alpha & numeric)

Examples: 7400, 54H01, 74LS05

 

B is the Package type:

F – Flat package, metal, 1/2 inch tip-to-tip, die is electrically insulted from case

H – Flat package, ceramic, 3/4 inch tip-to-tip, die is electrically insulted from case

J – DIP, ceramic

L – Plug-in package (TO-5 transistor style), metal

N – DIP, plastic

R – Flat package, metal, 3/4 inch tip-to-tip, die is electrically insulted from case

S – Flat package, metal, 1/2 inch tip-to-tip, die is electrically connected to the case

T – Flat package,  metal, 3/4 inch tip-to-tip, die is electrically connected to the case

CC is the processing instructions:

Ranges from 00-17, indicates processing options for lead forming, insulation, shipping carrier, and solder-dipped leads

Other Chip Prefixes

TMC – MOS Calculator Chips

TMS – MOS Chips

 

Date Code

TI Date Code Format: YYWW

These number should be located by themselves with no letters or other numbers immediately adjacent. The numbers are often found on the underside with the country of manufacture.

WW – Week of manufacture. Ranges from 01 to 52.

YY – Year of manufacture. Ranges from 59 to 99.