Programming instructions

TTL
Multisim Component Reference Guide 6-82 ni.com
buffers are in the high impedance mode but this does not interfere with entering new data into
the latches.
6.4.14274xx574 (Octal D-type Flip-Flop)
This device consists of eight edge-triggered flip-flops with individual D-type inputs and 3-
STATE true outputs. The buffered clock and buffered Output Enable are common to all flip-
flops. The eight flip-flops will store the state of their individual D inputs that meet the setup
and hold times requirements on the LOW-to-HIGH Clock (CP) transition. With the Output
Enable (OE) LOW, the contents of the eight flip-flops are available at the outputs. When OE
is HIGH, the outputs go to the high impedance state. Operation of the OE input does not affect
the state of the flipflops.
ComponentRef.book Page 82 Thursday, December 7, 2006 10:12 AM