74F573PC Fairchild Semiconductor, 74F573PC Datasheet - Page 2

• Manufacturer Part Number: 74F573PC
• Description: IC LATCH OCTAL D-TYPE 20-DIP
• Manufacturer: Fairchild Semiconductor
• Series: 74Fr

Specifications of 74F573PC

• 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: 5.3ns
• Current - Output High, Low: 3mA, 24mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 74F573

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Unit Loading/Fan Out
Functional Description
The 74F573 contains eight D-type latches with 3-state out-
put buffers. When the Latch Enable (LE) input is HIGH,
data on the D
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 information that was present on the D
inputs a 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 in the
bi-state mode. When OE is HIGH the buffers are in the high
impedance mode but this 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.
D
LE
OE
O
Pin Names
0
0
–D
–O
7
7
n
inputs enters the latches. In this condition
Data Inputs
Latch Enable Input (Active HIGH)
3-STATE Output Enable Input (Active LOW)
3-STATE Latch Outputs
Description
2
Function Table
H
L
X
O
0
LOW Voltage Level
HIGH Voltage Level
Immaterial
Value stored from previous clock cycle
150/40(33.3)
OE
HIGH/LOW
H
L
L
L
1.0/1.0
1.0/1.0
1.0/1.0
U.L.
Inputs
LE
H
H
X
L
3 mA/24 mA (20 mA)
Output I
20 A/ 0.6 mA
20 A/ 0.6 mA
20 A/ 0.6 mA
Input I
D
H
L
X
X
IH
OH
/I
Outputs
/I
IL
OL
O
O
H
L
Z
0