74ACT841 Fairchild Semiconductor, 74ACT841 Datasheet - Page 2

• Manufacturer Part Number: 74ACT841
• Description: 10-Bit Transparent Latch with 3-STATE Outputs
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
Functional Description
The ACT841 consists of ten D-type latches with 3-STATE
outputs. The flip-flops appear transparent to the data when
Latch Enable (LE) is HIGH. This allows asynchronous
operation, as the output transition follows the data in transi-
tion.
Function Table
H
L
X
Z
NC
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.
LOW Voltage Level
High Impedance
HIGH Voltage Level
Immaterial
No Change
OE
X
H
H
H
L
L
L
Inputs
LE
X
H
H
H
H
L
L
D
X
H
X
H
X
L
L
Internal
NC
NC
Q
2
X
H
H
L
L
On the LE HIGH-to-LOW transition, the data that meets the
setup and hold time is latched. Data appears on the bus
when the Output Enable (OE) is LOW. When OE is HIGH
the bus output is in the high impedance state.
Output
NC
O
H
Z
Z
Z
Z
L
High Z
High Z
High Z
Latched
Transparent
Transparent
Latched
Function