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54LS90

ETC
Part Number 54LS90
Manufacturer ETC
Description DECADE COUNTER
Published Oct 23, 2019
Detailed Description 54/7490A 54LS/74LS90 DECADE COUNTER 90 CONNECTION DIAGRAM PINOUT A DESCRIPTION — The ’90 is a 4-stage ripple counter c...
Datasheet PDF File 54LS90 PDF File

54LS90
54LS90

Overview
54/7490A 54LS/74LS90 DECADE COUNTER 90 CONNECTION DIAGRAM PINOUT A DESCRIPTION — The ’90 is a 4-stage ripple counter containing a high speed flip-flop acting as a divide-by-two and three flip-flops connected as a divideby-five counter.
It can be connected to operate with a conventional BCD out­ put pattern or it can be connected to provide a 50% duty cycle output.
In the BCD mode, HIGH signals on the Master Set (MS) inputs set the outputs to BCD nine.
HIGH signals on the Master Reset (MR) inputs force all outputs LOW.
For a similar counter with corner power pins, see the ’LS290; for dual versions, see the ’LS390 and ’LS490.
ORDERING CODE: See Section 9 PKGS PIN OUT COMMERCIAL GRADE Vcc...


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