74ACTQ573SC Fairchild Semiconductor, 74ACTQ573SC Datasheet - Page 2

• Manufacturer Part Number: 74ACTQ573SC
• Description: IC LATCH OCTAL 3STATE 20SOIC
• Manufacturer: Fairchild Semiconductor
• Series: 74ACTQr

Specifications of 74ACTQ573SC

• 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: 6.5ns
• Current - Output High, Low: 24mA, 24mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Dc: 99+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

©1990 Fairchild Semiconductor Corporation
74ACQ573, 74ACTQ573 Rev. 1.5
Logic Symbol
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.
IEEE/IEC
2
Functional Description
The ACQ/ACTQ573 contains eight D-type latches with
3-STATE output buffers. When the Latch Enable (LE)
input is HIGH, data on the D
In this condition the latches are transparent, i.e., a latch
output will change state each time its D-type input
changes. When LE is LOW the latches store the informa-
tion that was present on the D-type inputs at setup time
preceding 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 enabled.
When OE is HIGH the buffers are in the high impedance
mode but this does not interfere with entering new data
into the latches.
Truth Table
H = HIGH Voltage
L = LOW Voltage
Z = High Impedance
X = Immaterial
O
Latch Enable
0
= Previous O
OE
H
L
L
L
Inputs
0
LE
before HIGH-to-LOW transition of
H
H
X
L
n
inputs enters the latches.
D
H
X
X
L
Outputs
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O
O
H
Z
L
n
0