74ABT374 Fairchild Semiconductor, 74ABT374 Datasheet - Page 2

• Manufacturer Part Number: 74ABT374
• Description: Octal D-Type Flip-Flop with 3-STATE Outputs
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
Functional Description
The ABT374 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 time
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 are in a high impedance state. Opera-
tion of the OE input does not affect the state of the flip-
flops.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
2
Function Table
H
L
X

Z
NC
OE CP
LOW Voltage Level
High Impedance
HIGH Voltage Level
Immaterial
H
H
H
H
L
L
L
L
LOW-to-HIGH Transition
No Change
Inputs




H
H
H
H
D
H
H
H
H
L
L
L
L
Internal Outputs
NC
NC
NC
NC
Q
H
H
L
L
NC
NC
O
H
Z
Z
Z
Z
L
Hold
Hold
Load
Load
Data Available
Data Available
No Change in Data
No Change in Data
Function