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74AC520PC PDF даташит

Спецификация 74AC520PC изготовлена ​​​​«Fairchild Semiconductor» и имеет функцию, называемую «8-Bit Identity Comparator».

Детали детали

Номер произв 74AC520PC
Описание 8-Bit Identity Comparator
Производители Fairchild Semiconductor
логотип Fairchild Semiconductor логотип 

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74AC520PC Даташит, Описание, Даташиты
February 1989
Revised November 1999
74AC520 74ACT520
8-Bit Identity Comparator
General Description
The AC/ACT520 are expandable 8-bit comparators. They
compare two words of up to eight bits each and provide a
LOW output when the two words match bit for bit. The
expansion input IA = B also serves as an active LOW enable
input.
Features
s Compares two 8-bit words in 6.5 ns typ
s Expandable to any word length
s 20-pin package
s Outputs source/sink 24 mA
s ACT520 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74AC520PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
74ACT520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74ACT520SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACT520PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
A0A7
B0B7
TA = B
OA = B
Description
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS010194
www.fairchildsemi.com









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74AC520PC Даташит, Описание, Даташиты
Truth Table
Inputs
IA = B
A, B
L A = B (Note 1)
L A≠Β
H A = B (Note 1)
H A≠Β
H = HIGH Voltage Level
L = LOW Voltage Level
Note 1: *A0 = B0, A1 = B1, A2 = B2, etc.
Outputs
OA = B
L
H
H
H
Logic Diagram
Applications
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Ripple Expansion
Parallel Expansion
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74AC520PC Даташит, Описание, Даташиты
Absolute Maximum Ratings(Note 2)
Supply Voltage (VCC)
DC Input Diode Current (IIK)
VI = −0.5V
VI = VCC + 0.5V
DC Input Voltage (VI)
DC Output Diode Current (IOK)
VO = −0.5V
VO = VCC + 0.5V
DC Output Voltage (VO)
DC Output Source
or Sink Current (IO)
DC VCC or Ground Current
per Output Pin (ICC or IGND)
Storage Temperature (TSTG)
Junction Temperature (TJ)
PDIP
0.5V to +7.0V
20 mA
+20 mA
0.5V to VCC + 0.5V
20 mA
+20 mA
0.5V to VCC + 0.5V
±50 mA
±50 mA
65°C to +150°C
140°C
Recommended Operating
Conditions
Supply Voltage (VCC)
AC
2.0V to 6.0V
ACT 4.5V to 5.5V
Input Voltage (VI)
Output Voltage (VO)
Operating Temperature (TA)
Minimum Input Edge Rate (V/t)
0V to VCC
0V to VCC
40°C to +85°C
AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (V/t)
125 mV/ns
ACT Devices
VIN from 0.8V to 2.0V
VCC @ 4.5V, 5.5V
125 mV/ns
Note 2: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, with-
out exception, to ensure that the system design is reliable over its power
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACTcircuits outside databook specifications.
DC Electrical Characteristics for AC
Symbol
Parameter
VCC
TA = +25°C
TA = −40°C to +85°C
Units
(V) Typ
Guaranteed Limits
Conditions
VIH Minimum HIGH Level
Input Voltage
3.0 1.5 2.1
2.1
VOUT = 0.1V
4.5 2.25 3.15 3.15 V or VCC 0.1V
5.5 2.75 3.85
3.85
VIL Maximum LOW Level
Input Voltage
3.0 1.5 0.9
0.9
VOUT = 0.1V
4.5 2.25 1.35 1.35 V or VCC 0.1V
5.5 2.75 1.65
1.65
VOH Minimum HIGH Level
Output Voltage
3.0 2.99 2.9
4.5 4.49 4.4
5.5 5.49 5.4
2.9
4.4 V IOUT = −50 µA
5.4
VOL Maximum LOW Level
Output Voltage
3.0 2.56
4.5 3.86
5.5 4.86
3.0 0.002 0.1
4.5 0.001 0.1
5.5 0.001 0.1
2.46
3.76
4.76
0.1
0.1
0.1
VIN = VIL or VIH
IOH = 12 mA
V IOH = 24 mA
IOH = 24 mA (Note 3)
V IOUT = 50 µA
3.0
4.5
5.5
IIN (Note 5) Maximum Input Leakage Current
5.5
IIH Maximum Input HIGH Leakage Current 5.5
IIL
Maximum Input LOW Leakage Current 5.5
0.3
IOLD
Minimum Dynamic
5.5
IOHD
Output Current (Note 4)
5.5
ICC
Maximum Quiescent Supply Current
5.5
ICC (Note 5) Maximum Quiescent Supply Current 5.5 2.3
Note 3: All outputs loaded; thresholds on input associated with output under test.
0.36
0.36
0.36
±0.1
10.0
0.6
4.0
4.8
0.44
0.44
0.44
±1.0
10.0
1.0
75
75
40.0
8.0
VIN = VIL or VIH
IOL = 12 mA
V IOL = 24 mA
IOL = 24 mA (Note 3)
µA VI = VCC, GND, A Inputs Only
µA VI = VCC, B Inputs Only
mA VI = VCC, B Inputs Only
mA VOLD = 1.65V Max
mA VOHD = 3.85V Min
µA VIN = VCC
mA VIN = GND
Note 4: Maximum test duration 2.0 ms, one output loaded at a time.
Note 5: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC.
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74AC520PC8-Bit Identity ComparatorFairchild Semiconductor
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