74AC573 查看數據表（PDF） - Motorola => Freescale
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74AC573 Datasheet PDF : 8 Pages
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MC74AC573
MC74ACT573
Octal DĆType Latch
with 3ĆState Outputs
The MC74AC573/74ACT573 is a high-speed octal latch with buffered common
Latch Enable (LE) and buffered common Output Enable (OE) inputs.
The MC74AC573/74ACT573 is functionally identical to the MC74AC373/
74ACT373 but has inputs and outputs on opposite sides.
• Inputs and Outputs on Opposite Sides of Package
Allowing Easy Interface with Microprocessors
• Useful as Input or Output Port for Microprocessors
• Functionally Identical to MC74AC373/74ACT373
• 3-State Outputs for Bus Interfacing
• Outputs Source/Sink 24 mA
• ′ACT573 Has TTL Compatible Inputs
VCC O0 O1 O2 O3 O4 O5 O6 O7 LE
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
OE D0 D1 D2 D3 D4 D5 D6 D7 GND
PIN NAMES
D0–D7
LE
OE
O0–O7
Data Inputs
Latch Enable Input
3-State Output Enable Input
3-State Latch Outputs
TRUTH TABLE
Inputs
Outputs
OE
LE
Dn
On
L
H
H
H
L
H
L
H
L
L
X
O0
H
X
X
Z
H = HIGH Voltage Level
L = LOW Voltage Level
Z = High Impedance
X = Immaterial
O0 = Previous O0 before LOW-to-HIGH Transition of Clock
OCTAL D-TYPE
LATCH WITH
3-STATE OUTPUTS
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
LOGIC SYMBOL
D0 D1 D2 D3 D4 D5 D6 D7
LE
OE
O0 O1 O2 O3 O4 O5 O6 O7
FACT DATA
5-1
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