MC74ACT374ML1 [ROCHESTER]
IC,FLIP-FLOP,OCTAL,D TYPE,ACT-CMOS,SOP,20PIN,PLASTIC;型号: | MC74ACT374ML1 |
厂家: | Rochester Electronics |
描述: | IC,FLIP-FLOP,OCTAL,D TYPE,ACT-CMOS,SOP,20PIN,PLASTIC |
文件: | 总13页 (文件大小:796K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
MC74AC374, MC74ACT374
Octal D-Type Flip-Flop with
3-State Outputs
The MC74AC374/74ACT374 is a high–speed, low–power octal
D–type flip–flop featuring separate D–type inputs for each flip–flop
and 3–state outputs for bus–oriented applications. A buffered Clock
(CP) and Output Enable (OE) are common to all flip–flops.
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PDIP–20
N SUFFIX
CASE 738
• Buffered Positive Edge–Triggered Clock
• 3–State Outputs for Bus–Oriented Applications
• Outputs Source/Sink 24 mA
20
• See MC74AC273 for Reset Version
1
SO–20
DW SUFFIX
CASE 751
• See MC74AC377 for Clock Enable Version
• See MC74AC373 for Transparent Latch Version
• See MC74AC574 for Broadside Pinout Version
20
1
• See MC74AC564 for Broadside Pinout Version with Inverted
Outputs
TSSOP–20
DT SUFFIX
CASE 948E
20
• ′ACT374 Has TTL Compatible Inputs
1
EIAJ–20
M SUFFIX
CASE 967
V
O
D
D
O
O
D
D
O
4
CP
11
CC
7
7
6
6
5
5
4
20
19
18
17
16
15
14
12
13
20
1
ORDERING INFORMATION
Device
Package
PDIP–20
PDIP–20
SOIC–20
Shipping
MC74AC374N
18 Units/Rail
18 Units/Rail
38 Units/Rail
1
2
3
4
5
6
7
9
8
10
MC74ACT374N
MC74AC374DW
MC74AC374DWR2
MC74ACT374DW
OE
O
0
D
0
D
1
O
1
O
2
D
2
D
3
O
3
GND
Figure 1. Pinout: 20 Lead Packages Conductors
(Top View)
SOIC–20 1000 Tape & Reel
SOIC–20 38 Units/Rail
PIN ASSIGNMENT
MC74ACT374DWR2 SOIC–20 1000 Tape & Reel
PIN
FUNCTION
MC74AC374DT
MC74ACT374DT
TSSOP–20
TSSOP–20
75 Units/Rail
75 Units/Rail
D –D
0
Data Inputs
7
CP
OE
Clock Pulse Input
3–State Output Enable Input
3–State Outputs
MC74ACT374DTR2 TSSOP–20 2500 Tape & Reel
MC74AC374M
EIAJ–20
EIAJ–20 2000 Tape & Reel
EIAJ–20 40 Units/Rail
EIAJ–20 2000 Tape & Reel
40 Units/Rail
O –O
0
7
MC74AC374MEL
MC74ACT374M
MC74ACT374MEL
D
0
D
1
D
2
D
3
D
4
D
5
D D
6 7
CP
OE
O
0
O
1
O O O O O O
2 3 4 5 6 7
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 7 of this data sheet.
Figure 2. Logic Symbol
Semiconductor Components Industries, LLC, 2002
1
Publication Order Number:
July, 2002 – Rev. 6
MC74AC374/D
MC74AC374, MC74ACT374
FUNCTIONAL DESCRIPTION
TRUTH TABLE
The MC74AC374/74ACT374 consists of eight edge–
triggered flip–flops with individual D–type inputs and
3–state true outputs. The buffered clock and buffered Output
Enable are common to all flip–flops. The eight flip–flops
will store the state of their individual D inputs that meet the
setup and hold time requirements on the LOW–to–HIGH
Clock (CP) transition. With the Output Enable (OE) LOW,
the contents of the eight flip–flops are available at the
outputs. When the OE is HIGH, the outputs go to the high
impedance state. Operation of the OE input does not affect
the state of the flip–flops.
Inputs
Outputs
D
CP
OE
O
n
n
H
L
X
L
L
H
H
L
Z
X
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
= LOW-to-HIGH Transition
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
CP
CP
Q
D
Q
CP
Q
D
Q
CP
Q
D
Q
CP
Q
D
Q
CP
Q
D
Q
CP
Q
D
Q
CP
Q
D
Q
CP
Q
D
Q
OE
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
NOTE: That this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Figure 3. Logic Diagram
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
V
V
V
V
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
–0.5 to +7.0
CC
IN
–0.5 to V +0.5
V
CC
–0.5 to V +0.5
V
OUT
CC
I
I
I
±20
±50
mA
mA
mA
°C
IN
DC Output Sink/Source Current, per Pin
OUT
CC
DC V or GND Current per Output Pin
±50
CC
T
stg
Storage Temperature
–65 to +150
*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the
Recommended Operating Conditions.
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2
MC74AC374, MC74ACT374
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Typ
5.0
5.0
Max
6.0
Unit
′AC
2.0
4.5
0
V
V
Supply Voltage
V
V
CC
′ACT
5.5
, V
OUT
DC Input Voltage, Output Voltage (Ref. to GND)
V
CC
IN
V
CC
V
CC
V
CC
V
CC
V
CC
@ 3.0 V
@ 4.5 V
@ 5.5 V
@ 4.5 V
@ 5.5 V
–
150
40
25
10
8.0
–
–
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
–
–
–
–
–
ns/V
t , t
r
f
–
–
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
t , t
ns/V
r
f
–
T
J
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current – High
–
140
85
°C
°C
T
A
–40
–
25
–
I
–24
24
mA
mA
OH
OL
I
Output Current – Low
–
–
1. V from 30% to 70% V ; see individual Data Sheets for devices that differ from the typical input rise and fall times.
IN
CC
2. V from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
IN
DC CHARACTERISTICS
74AC
74AC
V
(V)
CC
T
A
= +25°C
T
A
= –40°C to +85°C
Symbol
Parameter
Unit
Conditions
Typ
Guaranteed Limits
V
V
V
3.0
4.5
5.5
1.5
2.25
2.75
2.1
3.15
3.85
2.1
3.15
3.85
V
= 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V – 0.1 V
CC
3.0
4.5
5.5
1.5
2.25
2.75
0.9
1.35
1.65
0.9
1.35
1.65
V
OUT
= 0.1 V
Maximum Low Level
Input Voltage
IL
or V – 0.1 V
CC
3.0
4.5
5.5
2.99
4.49
5.49
2.9
4.4
5.4
2.9
4.4
5.4
I
= –50 mA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IH
IN
IL
3.0
4.5
5.5
–
–
–
2.56
3.86
4.86
2.46
3.76
4.76
–12 mA
–24 mA
–24 mA
V
V
V
I
OH
V
OL
3.0
4.5
5.5
0.002
0.001
0.001
0.1
0.1
0.1
0.1
0.1
0.1
I
= 50 mA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN
IL
IH
3.0
4.5
5.5
–
–
–
0.36
0.36
0.36
0.44
0.44
0.44
12 mA
24 mA
24 mA
I
OL
I
Maximum Input
Leakage Current
IN
5.5
5.5
–
–
±0.1
±0.5
±1.0
±5.0
mA
mA
V = V , GND
I CC
I
V (OE) = V , V
I IL IH
Maximum
3-State
OZ
V = V , GND
I
CC
Current
V
V
V
= V , GND
O
CC
I
I
5.5
5.5
–
–
–
–
75
mA
mA
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OLD
OHD
–75
= 3.85 V Min
OHD
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
NOTE:
I
IN
and I @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
.
CC
CC
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3
MC74AC374, MC74ACT374
DC CHARACTERISTICS (continued)
74AC
74AC
V
(V)
CC
Symbol
Parameter
T
A
= +25°C
T
A
= –40°C to +85°C
Unit
Conditions
Typ
Guaranteed Limits
I
Maximum Quiescent
Supply Current
CC
5.5
–
8.0
80
mA
V = V or GND
IN CC
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
NOTE:
I
IN
and I @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
.
CC
CC
AC CHARACTERISTICS (For Figures and Waveforms – See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74AC
74AC
T
= –40°C
A
T
= +25°C
V
(V)
*
Fig.
No.
A
CC
to +85°C
C = 50 pF
Symbol
Parameter
Unit
C = 50 pF
L
L
Min
Typ
Max
Min
Max
Maximum Clock
Frequency
3.3
5.0
60
100
110
155
–
–
60
100
–
–
f
t
t
t
t
t
t
MHz
ns
3–3
3–6
3–6
3–7
3–8
3–7
3–8
max
Propagation Delay
3.3
5.0
3.0
2.5
11
8.0
13.5
9.5
1.5
1.5
15.5
10.5
PLH
PHL
PZH
PZL
PHZ
PLZ
CP to O
n
Propagation Delay
CP to O
3.3
5.0
2.5
2.0
10
7.0
12.5
9.0
2.0
1.5
14
10
ns
n
3.3
5.0
3.0
2.0
9.5
7.0
11.5
8.5
1.5
1.0
13
9.5
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
ns
3.3
5.0
2.5
2.0
9.0
6.5
11.5
8.5
1.5
1.0
13
9.5
ns
3.3
5.0
3.0
2.0
10.5
8.0
12.5
11
2.0
2.0
14.5
12.5
ns
3.3
5.0
2.0
1.5
8.0
6.5
11.5
8.5
1.0
1.0
12.5
10
ns
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
74AC
74AC
T
= –40°C
A
T
= +25°C
V
(V)
*
Fig.
No.
A
CC
to +85°C
C = 50 pF
Symbol
Parameter
Unit
C = 50 pF
L
L
Typ
Guaranteed Minimum
Setup Time, HIGH or LOW
D to CP
n
3.3
5.0
2.0
1.0
5.5
4.0
6.0
4.5
t
t
t
ns
ns
ns
3–9
3–9
3–6
s
Hold Time, HIGH or LOW
D to CP
n
3.3
5.0
–1.0
0
1.0
1.5
1.0
1.5
h
w
CP Pulse Width
HIGH or LOW
3.3
5.0
4.0
2.5
5.5
4.0
6.0
4.5
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
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4
MC74AC374, MC74ACT374
DC CHARACTERISTICS
Symbol
74ACT
74ACT
T
A
=
V
(V)
CC
T
= +25°C
–40°C to
+85°C
Parameter
Unit
Conditions
A
Typ
Guaranteed Limits
V
V
V
4.5
5.5
1.5
1.5
2.0
2.0
2.0
2.0
V
= 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V – 0.1 V
CC
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
V
OUT
= 0.1 V
Maximum Low Level
Input Voltage
IL
or V – 0.1 V
CC
4.5
5.5
4.49
5.49
4.4
5.4
4.4
5.4
I
= –50 mA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IH
IN
IL
4.5
5.5
–
–
3.86
4.86
3.76
4.76
V
V
V
–24 mA
–24 mA
I
I
OH
V
OL
4.5
5.5
0.001
0.001
0.1
0.1
0.1
0.1
= 50 mA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN
IL
IH
4.5
5.5
–
–
0.36
0.36
0.44
0.44
24 mA
24 mA
I
OL
I
Maximum Input
Leakage Current
IN
5.5
5.5
–
±0.1
±1.0
mA
V = V , GND
I CC
DI
Additional Max. I /Input
0.6
–
1.5
mA
V = V – 2.1 V
I CC
CCT
CC
I
V (OE) = V , V
I IL IH
Maximum
3-State
OZ
5.5
–
±0.5
±5.0
mA
V = V , GND
I
CC
Current
V
V
V
= V , GND
O
CC
I
I
I
5.5
5.5
–
–
–
–
75
mA
mA
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OLD
OHD
–75
= 3.85 V Min
OHD
CC
Maximum Quiescent
Supply Current
5.5
–
8.0
80
mA
V = V or GND
IN CC
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
AC CHARACTERISTICS (For Figures and Waveforms – See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74ACT
74ACT
T
= –40°C
A
T
= +25°C
V
(V)
*
Fig.
No.
A
CC
to +85°C
C = 50 pF
Symbol
Parameter
Unit
C = 50 pF
L
L
Min
Typ
Max
Min
Max
Maximum Clock
Frequency
f
t
t
5.0
5.0
5.0
100
160
–
90
–
MHz
ns
3–3
3–6
3–6
max
Propagation Delay
2.0
2.0
8.5
8.0
10
2.0
1.5
11.5
11
PLH
PHL
CP to O
n
Propagation Delay
CP to O
9.5
ns
n
t
t
t
t
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
5.0
5.0
5.0
5.0
2.0
1.5
1.5
1.5
8.0
8.0
8.5
7.0
9.5
9.0
1.5
1.5
1.0
1.0
10.5
10.5
12.5
10
ns
ns
ns
ns
3–7
3–8
3–7
3–8
PZH
PZL
PHZ
PLZ
11.5
8.5
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
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5
MC74AC374, MC74ACT374
AC OPERATING REQUIREMENTS
74ACT
74ACT
= –40°C
T
A
T
= +25°C
V
(V)
*
Fig.
No.
A
CC
to +85°C
C = 50 pF
Symbol
Parameter
Unit
C = 50 pF
L
L
Typ
Guaranteed Minimum
Setup Time, HIGH or LOW
D to CP
n
t
t
t
5.0
5.0
5.0
1.0
5.0
1.5
5.0
5.5
1.5
5.0
ns
ns
ns
3–9
3–9
3–6
s
Hold Time, HIGH or LOW
D to CP
n
0
h
w
CP Pulse Width
HIGH or LOW
2.5
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Value
Parameter
Unit
Test Conditions
Typ
4.5
80
C
C
Input Capacitance
Power Dissipation Capacitance
pF
pF
V
V
= 5.0 V
= 5.0 V
IN
CC
PD
CC
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6
MC74AC374, MC74ACT374
MARKING DIAGRAMS
PDIP–20
SO–20
TSSOP–20
EIAJ–20
AC374
AWLYYWW
MC74AC374N
AWLYYWW
74AC374
AWLYWW
AC
374
ALYW
ACT374
AWLYYWW
MC74ACT374N
AWLYYWW
74ACT374
AWLYWW
ACT
374
ALYW
A
= Assembly Location
WL, L = Wafer Lot
YY, Y
= Year
WW, W = Work Week
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7
MC74AC374, MC74ACT374
PACKAGE DIMENSIONS
PDIP–20
N SUFFIX
20 PIN PLASTIC DIP PACKAGE
CASE 738–03
ISSUE E
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
20
1
11
10
B
4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
L
C
INCHES
DIM MIN MAX
1.070 25.66
MILLIMETERS
MIN
MAX
27.17
6.60
4.57
0.55
A
B
C
D
E
F
1.010
0.240
0.150
0.015
0.260
0.180
0.022
6.10
3.81
0.39
–T–
SEATING
PLANE
K
0.050 BSC
1.27 BSC
M
0.050
0.070
1.27
1.77
N
E
G
J
0.100 BSC
2.54 BSC
0.008
0.110
0.015
0.140
0.21
2.80
0.38
3.55
G
F
K
L
J 20 PL
0.300 BSC
7.62 BSC
D 20 PL
M
M
B
0.25 (0.010)
T
M
N
0
0.020
15
_
0.040
0
_
0.51
15
_
1.01
_
M
M
0.25 (0.010)
T
A
SO–20
DW SUFFIX
20 PIN PLASTIC SOIC PACKAGE
CASE 751D–05
ISSUE F
D
A
q
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
20
11
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
PROTRUSION.
E
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION SHALL
BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1
10
MILLIMETERS
DIM MIN
MAX
2.65
0.25
0.49
0.32
12.95
7.60
B
A
A1
B
C
D
E
2.35
0.10
0.35
0.23
12.65
7.40
20X B
M
S
S
B
T
0.25
A
e
1.27 BSC
A
H
h
10.05
0.25
0.50
0
10.55
0.75
0.90
7
L
SEATING
PLANE
q
_
_
18X e
A1
C
T
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8
MC74AC374, MC74ACT374
PACKAGE DIMENSIONS
TSSOP–20
DT SUFFIX
20 PIN PLASTIC TSSOP PACKAGE
CASE 948E–02
ISSUE A
20X K REF
NOTES:
ąă1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
M
S
S
V
0.10 (0.004)
T
U
S
U
0.15 (0.006) T
ąă2. CONTROLLING DIMENSION: MILLIMETER.
ąă3. DIMENSION A DOES NOT INCLUDE MOLD
FLASH, PROTRUSIONS OR GATE BURRS. MOLD
FLASH OR GATE BURRS SHALL NOT EXCEED
0.15 (0.006) PER SIDE.
ąă4. DIMENSION B DOES NOT INCLUDE
INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION SHALL NOT
EXCEED 0.25 (0.010) PER SIDE.
ąă5. DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
K
K1
20
11
2X L/2
J J1
B
L
–U–
PIN 1
IDENT
SECTION N–N
1
10
0.25 (0.010)
ąă6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
N
S
ąă7. DIMENSION A AND B ARE TO BE
DETERMINED AT DATUM PLANE -W-.
0.15 (0.006) T
U
M
A
–V–
MILLIMETERS
DIM MIN MAX
INCHES
MIN
MAX
0.260
0.177
0.047
0.006
0.030
A
B
6.40
4.30
---
6.60 0.252
4.50 0.169
N
C
1.20
---
D
0.05
0.50
0.15 0.002
0.75 0.020
F
F
G
H
0.65 BSC
0.026 BSC
DETAIL E
0.27
0.09
0.09
0.19
0.19
0.37
0.011
0.015
0.008
0.006
0.012
0.010
J
0.20 0.004
0.16 0.004
0.30 0.007
0.25 0.007
–W–
J1
K
C
K1
L
6.40 BSC
0.252 BSC
0
G
D
M
0
8
8
_
_
_
_
H
DETAIL E
0.100 (0.004)
–T– SEATING
PLANE
EIAJ–20
M SUFFIX
20 PIN PLASTIC EIAJ PACKAGE
CASE 967–01
ISSUE O
NOTES:
ąă1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
ąă2. CONTROLLING DIMENSION: MILLIMETER.
ąă3. DIMENSIONS D AND E DO NOT INCLUDE
MOLD FLASH OR PROTRUSIONS AND ARE
MEASURED AT THE PARTING LINE. MOLD FLASH
OR PROTRUSIONS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
L
E
20
11
Q
1
ąă4. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
H
E
_
E
M
ąă5. THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
L
1
10
DETAIL P
Z
D
VIEW P
MILLIMETERS
INCHES
MIN
---
e
A
DIM MIN
MAX
MAX
0.081
0.008
0.020
0.011
0.504
0.215
c
A
---
0.05
0.35
0.18
12.35
5.10
2.05
A
1
0.20 0.002
0.50 0.014
0.27 0.007
b
c
D
E
12.80 0.486
5.45 0.201
A
b
1
e
1.27 BSC
0.050 BSC
M
0.10 (0.004)
0.13 (0.005)
H
7.40
0.50
1.10
8.20 0.291
0.85 0.020
1.50 0.043
0.323
0.033
0.059
E
L
L
E
M
Q
0
10
0.90 0.028
10
_
0.035
0.032
0
_
_
_
0.70
---
1
Z
0.81
---
http://onsemi.com
9
MC74AC374, MC74ACT374
Notes
http://onsemi.com
10
MC74AC374, MC74ACT374
Notes
http://onsemi.com
11
MC74AC374, MC74ACT374
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MC74AC374/D
相关型号:
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IC ACT SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20, PLASTIC, EIAJ-20, Bus Driver/Transceiver
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