TTL types and marking

example of marking:

MH74ALS00S

Explanation:

MH … product of TESLA
74 … temperature range
ALS … TTL serie
00 … TTL function
S … suffix of reliability

Product of TESLA

see TESLA marking

Temperature range

operating ambient temperature
54 … military -55 +125 °C
74 … standard -0 +70 °C
84 … extended -25 +85 °C

TTL serie

TTL function

see TTL function in Wikipedia

Reliability

(without letter) … standard
S … measured and garanted reliability

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