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4:49 PM
@NickAlexeev they should up the limit of closed questions per day, have more incentives for sorting through the trash bin and people should stop going through the list of questions 3+ yrs old and throwing them away.
 
 
3 hours later…
7:48 PM
I am looking for a data sheet for an antique MHTL (HTL, essentially DTL, diode transistor logic). Part number MC667TL . . . I can't find a data sheet that shows where the timing capacitor and timing resistor connect. I have the following sheet :
From a generic data sheet page 23, but doesn't show the capacitor and resistor pin connections. Anybody ?
Reverse engineering shows that pins 1 and 13 are the inputs to trigger. Also that pins 2 and 12 are outputs. Then I find a capacitor from (9) to (11). And a capacitor from (11) to ground. (power is Vcc 14 and gnd 7)
 
8:22 PM
timing appears to be C60 and 6800 ohms. But I don't know what is C50 function
I don't think this antique problem of mine is good for a question on main site.
Yes, there should be a dot at the 4 way junction.
 
could it be 10nF
 
8:56 PM
Both capacitors clearly marked here as 0.01 uf.
I am familiar with TTL 74121 but this just seems weird having one capacitor to ground and another across terminals.
 

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