MOTOROLA MC74ACT521N 8-bit identity comparator Datasheet

 8-BIT IDENTITY
COMPARATOR
The MC74AC521/74ACT521 is an expandable 8-bit comparator. It
compares two words of up to eight bits each and provides a LOW output when
the two words match bit for bit. The expansion input IA=B also serves as an
active LOW enable input.
•
•
•
•
•
Compares Two 8-Bit Words in 6.5 ns Typ
Expandable to Any Word Length
20-Pin Package
Outputs Source/Sink 24 mA
′ACT521 has TTL-Compatible Inputs
VCC OA=B
B7
A7
B6
A6
B5
A5
B4
A4
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
IA=B
A0
B0
A1
B1
A2
B2
A3
B3
GND
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
PIN NAMES
A0–A7
B0–B7
IA=B
OA=B
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
LOGIC SYMBOL
TRUTH TABLE
Inputs
Outputs
IA=B
A, B
OA=B
L
L
H
H
A = B*
A≠B
A = B*
A≠B
L
H
H
H
B7 A7 B6 A6 B5 A5 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0
IA=B
OA=B
H = HIGH Voltage Level
L = LOW Voltage Level
*A0=B0, A1=B1, A2=B2, etc.
FACT DATA
5-1
MC74AC521 MC74ACT521
LOGIC DIAGRAM
A0
B0
A1
B1
A2
B2
A3
B3
OA=B
A4
B4
A5
B5
A6
B6
A7
B7
IA=B
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (Referenced to GND)
–0.5 to +7.0
V
Vin
DC Input Voltage (Referenced to GND)
–0.5 to VCC +0.5
V
Vout
DC Output Voltage (Referenced to GND)
–0.5 to VCC +0.5
V
Iin
DC Input Current, per Pin
±20
mA
Iout
DC Output Sink/Source Current, per Pin
±50
mA
ICC
DC VCC or GND Current per Output Pin
±50
mA
Tstg
Storage Temperature
–65 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
FACT DATA
5-2
MC74AC521 MC74ACT521
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
Supply Voltage
Vin, Vout
DC Input Voltage, Output Voltage (Ref. to GND)
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
TJ
Junction Temperature (PDIP)
TA
Operating Ambient Temperature Range
IOH
IOL
Typ
Max
′AC
2.0
5.0
6.0
′ACT
4.5
5.0
5.5
0
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
tr, tf
Min
Unit
V
VCC
VCC @ 3.0 V
150
VCC @ 4.5 V
40
VCC @ 5.5 V
25
VCC @ 4.5 V
10
VCC @ 5.5 V
8.0
V
ns/V
ns/V
140
°C
85
°C
Output Current — High
–24
mA
Output Current — Low
24
mA
–40
25
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC
74AC
TA = +25°C
TA =
–40°C to +85°C
Typ
VIH
VIL
VOH
1.5
2.25
2.75
2.1
3.15
3.85
2.1
3.15
3.85
V
VOUT = 0.1 V
or VCC – 0.1 V
Maximum Low Level
Input Voltage
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
VOUT = 0.1 V
or VCC – 0.1 V
Minimum High Level
Output Voltage
3.0
4.5
5.5
2.99
4.49
5.49
2.9
4.4
5.4
2.9
4.4
5.4
V
2.56
3.86
4.86
2.46
3.76
4.76
0.1
0.1
0.1
0.1
0.1
0.1
3.0
4.5
5.5
0.36
0.36
0.36
0.44
0.44
0.44
5.5
±0.1
Maximum Low Level
Output Voltage
Maximum Input
Leakage Current
IOLD
†Minimum Dynamic
Output Current
ICC
Guaranteed Limits
3.0
4.5
5.5
IIN
IOHD
Conditions
Minimum High Level
Input Voltage
3.0
4.5
5.5
VOL
Unit
Maximum Quiescent
Supply Current
3.0
4.5
5.5
0.002
0.001
0.001
IOUT = –50 µA
V
*VIN = VIL or VIH
–12 mA
IOH
–24 mA
–24 mA
IOUT = 50 µA
V
V
*VIN = VIL or VIH
12 mA
IOL
24 mA
24 mA
±1.0
µA
VI = VCC, GND
5.5
75
mA
VOLD = 1.65 V Max
5.5
–75
mA
VOHD = 3.85 V Min
80
µA
VIN = VCC or GND
5.5
8.0
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
FACT DATA
5-3
MC74AC521 MC74ACT521
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
VCC*
(V)
Parameter
Min
74AC
74AC
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Typ
Max
Min
Max
Unit
Fig.
No.
tPLH
Propagation Delay
An or Bn to OA=B
3.3
5.0
3.5
2.5
11
8.0
3.0
2.0
12
9.0
ns
3-6
tPHL
Propagation Delay
An or Bn to OA=B
3.3
5.0
4.5
3.0
11.5
8.5
3.5
2.5
12.5
9.0
ns
3-6
tPLH
Propagation Delay
IA=B to OA=B
3.3
5.0
3.0
2.5
8.0
6.0
2.5
2.0
9.0
7.0
ns
3-6
tPHL
Propagation Delay
IA=B to OA=B
3.3
5.0
3.0
2.0
8.0
6.0
2.5
2.0
9.0
7.0
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74ACT
74ACT
TA = +25°C
TA =
–40°C to +85°C
Typ
Guaranteed Limits
Unit
Conditions
VIH
Minimum High Level
Input Voltage
4.5
5.5
1.5
1.5
2.0
2.0
2.0
2.0
V
VOUT = 0.1 V
or VCC – 0.1 V
VIL
Maximum Low Level
Input Voltage
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
V
VOUT = 0.1 V
or VCC – 0.1 V
VOH
Minimum High Level
Output Voltage
4.5
5.5
4.49
5.49
4.4
5.4
4.4
5.4
V
3.86
4.86
3.76
4.76
0.1
0.1
0.1
0.1
4.5
5.5
0.36
0.36
0.44
0.44
V
*VIN = VIL or VIH
24 mA
IOL
24 mA
±0.1
±1.0
µA
VI = VCC, GND
1.5
mA
VI = VCC – 2.1 V
4.5
5.5
VOL
Maximum Low Level
Output Voltage
4.5
5.5
0.001
0.001
V
V
IOUT = –50 µA
*VIN = VIL or VIH
–24 mA
IOH
–24 mA
IOUT = 50 µA
IIN
Maximum Input
Leakage Current
5.5
∆ICCT
Additional Max. ICC/Input
5.5
IOLD
†Minimum Dynamic
Output Current
5.5
75
mA
VOLD = 1.65 V Max
5.5
–75
mA
VOHD = 3.85 V Min
80
µA
VIN = VCC or GND
IOHD
ICC
Maximum Quiescent
Supply Current
0.6
5.5
8.0
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-4
MC74AC521 MC74ACT521
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
VCC*
(V)
Parameter
74ACT
74ACT
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Min
Typ
Max
Min
Max
Unit
Fig.
No.
tPLH
Propagation Delay
An or Bn to OA=B
5.0
3.0
9.0
2.5
9.5
ns
3-6
tPHL
Propagation Delay
An or Bn to OA=B
5.0
3.0
10
2.5
11
ns
3-6
tPLH
Propagation Delay
IA=B to OA=B
5.0
2.0
6.5
2.0
7.0
ns
3-6
tPHL
Propagation Delay
IA=B to OA=B
5.0
2.5
7.5
2.0
8.0
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Parameter
Value
Typ
Unit
Test Conditions
CIN
Input Capacitance
4.5
pF
VCC = 5.0 V
CPD
Power Dissipation Capacitance
40
pF
VCC = 5.0 V
APPLICATIONS
RIPPLE EXPANSION
A0 B0
ENABLE
LOW
IA=B
........
A7 B7
A8 B8
IA=B
OA=B
A15 B15
A16 B16
A23 B23
........
........
IA=B
OA=B
OA=B
PARALLEL EXPANSION
A0 B0
ENABLE
LOW
IA=B
........
OA=B
A7 B7
A8 B8
A15 B15
A16 B16
........
IA=B
OA=B
FACT DATA
5-5
A23 B23
........
IA=B
OA=B
MC74AC521 MC74ACT521
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 738–03
ISSUE E
–A–
20
11
1
10
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
B
L
C
–T–
K
SEATING
PLANE
M
N
E
G
F
J
D
20 PL
0.25 (0.010)
20 PL
0.25 (0.010)
M
T A
M
M
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–04
ISSUE E
–A–
20
11
–B–
10X
P
0.010 (0.25)
1
M
B
M
10
20X
J
D
0.010 (0.25)
M
T A
B
S
S
F
R X 45 _
C
–T–
18X
G
SEATING
PLANE
K
T B
M
DIM
A
B
C
D
E
F
G
J
K
L
M
N
INCHES
MIN
MAX
1.010
1.070
0.240
0.260
0.150
0.180
0.015
0.022
0.050 BSC
0.050
0.070
0.100 BSC
0.008
0.015
0.110
0.140
0.300 BSC
0_
15 _
0.020
0.040
MILLIMETERS
MIN
MAX
25.66
27.17
6.10
6.60
3.81
4.57
0.39
0.55
1.27 BSC
1.27
1.77
2.54 BSC
0.21
0.38
2.80
3.55
7.62 BSC
0_
15_
0.51
1.01
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
MILLIMETERS
INCHES
DIM MIN
MAX
MIN
MAX
A
12.65
12.95
0.499
0.510
B
7.40
7.60
0.292
0.299
C
2.35
2.65
0.093
0.104
D
0.35
0.49
0.014
0.019
F
0.50
0.90
0.020
0.035
G
1.27 BSC
0.050 BSC
J
0.25
0.32
0.010
0.012
K
0.10
0.25
0.004
0.009
M
0_
7_
0_
7_
P
10.05
10.55
0.395
0.415
R
0.25
0.75
0.010
0.029
M
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◊
FACT DATA
5-6
*MC74AC521/D*
MC74AC521/D
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