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PDF MC74ACT573 Data sheet ( Hoja de datos )

Número de pieza MC74ACT573
Descripción OCTAL D-TYPE LATCH WITH 3-STATE OUTPUTS
Fabricantes Motorola Semiconductors　
Logotipo Motorola Semiconductors Logotipo



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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
L HH
LHL
LLX
HXX
On
H
H
O0
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
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MC74ACT573 pdf
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MC74AC573 MC74ACT573
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
tPLH
tPHL
tPLH
tPHL
tPZH
Propagation Delay
Dn to On
Propagation Delay
Dn to On
Propagation Delay
LE to On
Propagation Delay
LE to On
Output Enable Time
tPZL
Output Enable Time
tPHZ
Output Disable Time
tPLZ
Output Disable Time
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
Min Typ Max
3.3 2.5
5.0 2.5
3.3 2.5
5.0 2.5
13.0
10.0
12.0
9.5
3.3 2.5
5.0 2.5
3.3 2.5
5.0 2.5
13.0
9.5
12.0
8.5
3.3 2.5
5.0 2.5
3.3 2.5
5.0 2.5
3.3 2.5
5.0 2.5
3.3 2.5
5.0 2.5
11.0
9.0
11.0
8.5
12.5
11.0
9.5
8.0
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min Max
2.0 15.0
2.0 11.5
2.0 14.0
2.0 11.0
2.0 15.0
2.0 11.0
2.0 14.0
2.0 10.0
2.0 12.0
2.0 10.0
2.0 12.5
2.0 9.5
2.0 13.5
2.0 12.0
2.0 10.5
2.0 9.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Fig.
No.
3-5
3-5
3-6
3-6
3-7
3-8
3-7
3-8
AC OPERATING REQUIREMENTS
Symbol
Parameter
ts
Setup Time, HIGH or LOW
Dn to LE
th
Hold Time, HIGH or LOW
Dn to LE
tw LE Pulse Width, HIGH
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
74AC
74AC
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
3.3 3.5 4.0 ns 3-9
5.0 3.0 3.5
3.3 2.0 2.0 ns 3-9
5.0 2.0 2.0
3.3 6.0 7.0 ns 3-6
5.0 4.0 5.0
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