74ACT563SCX Fairchild Semiconductor, 74ACT563SCX Datasheet - Page 2

• Manufacturer Part Number: 74ACT563SCX
• Description: IC LATCH OCTAL HS 3STATE 20SOIC
• Manufacturer: Fairchild Semiconductor
• Series: 74ACTr

Specifications of 74ACT563SCX

• Logic Type: D-Type Transparent Latch
• Circuit: 8:8
• Output Type: Tri-State
• Voltage - Supply: 4.5 V ~ 5.5 V
• Independent Circuits: 1
• Delay Time - Propagation: 7ns
• Current - Output High, Low: 24mA, 24mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

©1988 Fairchild Semiconductor Corporation
74ACT563 Rev. 1.2
Functional Description
The ACT563 contains eight D-type latches with
3-STATE complementary outputs. When the Latch
Enable (LE) input is HIGH, data on the D
the latches. In this condition the latches are transparent,
i.e., a latch output will change state each time its D input
changes. When LE is LOW the latches store the informa-
tion that was present on the D inputs at setup time pre-
ceding the HIGH-to-LOW transition of LE. The 3-STATE
buffers are controlled by the Output Enable (OE) input.
When OE is LOW, the buffers are in the bi-state mode.
When OE is HIGH the buffers are in the high impedance
mode but that does not interfere with entering new data
into the latches.
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.
n
inputs enters
Figure 1.
2
Function Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
NC = No Change
OE LE
H
H
H
H
L
L
L
Inputs
H
H
H
H
X
L
L
D
H
H
X
X
X
L
L
Internal
NC
NC
Q
X
H
H
L
L
Output
NC
O
H
Z
Z
Z
Z
L
High-Z
High-Z
High-Z
Latched
Transparent
Transparent
Latched
Function
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