The 1820-0313 is a Fairchild 931HC or Motorola MC931G DTL clocked flipflop.
I think if you toy with a TTL or CMOS JK-flipflop; it should work with no
issues. The only caveat would be the 4.2V Vcc. The DTL logic was spec'ed
to run at 5V, same as TTL, but don't know how TTL logic would work at 4.2V.
CMOS runs fine at lower voltages - just slower. Many data sheets for 5V
parts include timings for 3.3V and 1.65V. I'd try HC.
As a rule of thumb, speed (MHz) is roughly linear going through 0 at 0V and
prop time is roughly linear going through 0 at absolute zero.
--
These are my opinions. I hate spam.
dgminala@mediacombb.net said:
> The 1820-0313 is a Fairchild 931HC or Motorola MC931G DTL clocked flipflop.
> I think if you toy with a TTL or CMOS JK-flipflop; it should work with no
> issues. The only caveat would be the 4.2V Vcc. The DTL logic was spec'ed
> to run at 5V, same as TTL, but don't know how TTL logic would work at 4.2V.
CMOS runs fine at lower voltages - just slower. Many data sheets for 5V
parts include timings for 3.3V and 1.65V. I'd try HC.
As a rule of thumb, speed (MHz) is roughly linear going through 0 at 0V and
prop time is roughly linear going through 0 at absolute zero.
--
These are my opinions. I hate spam.
