JM54AC521BSA [TI]
Identity Comparator, CMOS, CDFP20;
| 型号： | JM54AC521BSA |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Identity Comparator, CMOS, CDFP20 CD 逻辑集成电路 |
| 文件： | 总10页 (文件大小：199K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
September 1998
54AC521 • 54ACT521
8-Bit Identity Comparator
General Description
The AC/ACT521 is an expandable 8-bit comparator. It com-
pares two words of up to eight bits each and provides a LOW
output when the two words match bit for bit. The expansion
Features
n ICC reduced by 50%
n Compares two 8-bit words in 6.5 ns typ
n Expandable to any word length
n Outputs source/sink 24 mA
n ACT521 has TTL-compatible inputs
n Standard microcircuit Drawing (SMD)
54AC521: 5962-90985
input IA
also serves as an active LOW enable input.
=
B
54ACT521: 5962-89793
Logic Symbols
Connection Diagram
Pin Assignment
for DIP and CERPACK
DS100291-1
IEEE/IEC
DS100291-2
Pin Assignment
for LCC
DS100291-4
DS100291-3
Pin Descriptions
Pin Names
Description
A0–A7
B0–B7
TA
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
=
B
OA
=
B
™
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100291
www.national.com
Truth Table
Inputs
Outputs
OA
IA
A, B
=
=
B
B
=
≠
=
≠
L
A
A
A
A
B (Note 1)
L
L
H
H
B
H
H
H
B (Note 1)
B
=
=
H
L
HIGH Voltage Level
LOW Voltage Level
=
=
=
B , A B , etc.
2
Note 1:
A
B , A
0
0
1
1
2
Logic Diagram
DS100291-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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2
Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Recommended Operating
Conditions
Supply Voltage (VCC
)
AC
2.0V to 6.0V
4.5V to 5.5V
0V to VCC
Supply Voltage (VCC
)
−0.5V to +7.0V
ACT
DC Input Diode Current (IIK
)
Input Voltage (VI)
=
VI −0.5V
−20 mA
+20 mA
Output Voltage (VO
)
0V to VCC
=
VI VCC + 0.5V
Operating Temperature (TA)
54AC/ACT
DC Input Voltage (VI)
−0.5V to VCC + 0.5V
−55˚C to +125˚C
125 mV/ns
DC Output Diode Current (IOK
)
Minimum Input Edge Rate (∆V/∆t)
AC Devices
=
VO −0.5V
−20 mA
+20 mA
=
VO VCC + 0.5V
% to 70% of V
VIN from 30
CC
DC Output Voltage (VO
DC Output Source
)
−0.5V to VCC + 0.5V
@
VCC 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
ACT Devices
±
±
or Sink Current (IO
)
50 mA
DC VCC or Ground Current
per Output Pin (ICC or IGND
VIN from 0.8V to 2.0V
)
50 mA
@
VCC 4.5V, 5.5V
125 mV/ns
Storage Temperature (TSTG
Junction Temperature (TJ)
CDIP
)
−65˚C to +150˚C
Note 2: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, output/input loading variables. Fairchild does not recommend
175˚C
™
operation of FACT circuits outside databook specifications.
DC Electrical Characteristics for AC
=
Symbol
Parameter
VCC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
TA −55˚C to +125˚C
Units
Conditions
Guaranteed Limits
=
VIH
Minimum High Level
Input Voltage
2.1
3.15
3.85
0.9
VOUT 0.1V
V
V
V
or VCC − 0.1V
=
VIL
Maximum Low Level
Input Voltage
VOUT 0.1V
1.35
1.65
2.9
or VCC − 0.1V
=
IOUT −50 µA
VOH
Minimum High Level
Output Voltage
4.4
5.4
=
VIN
V
or VIH
IL
3.0
4.5
5.5
3.0
4.5
5.5
2.4
3.7
4.7
0.1
0.1
0.1
IOH = −4 mA
V
V
IOH = −24 mA
IOH = −24 mA (Note 3)
=
IOUT 50 µA
VOL
Maximum Low Level
Output Voltage
=
VIN
V
or VIH
IL
3.0
4.5
5.5
5.5
0.4
0.5
0.5
IOL = 12 mA
IOL = 24 mA
IOL = 24 mA (Note 3)
=
V
±
IIN
Maximum Input
Leakage Current
1.0
µA
VI
V CC, GND
(Note 5)
IOLD
=
VOLD 1.65V Max
Minimum Dynamic
Output Current (Note 4)
5.5
5.5
5.5
50
mA
mA
µA
=
VOHD 3.85V Min
IOHD
−50
80.0
=
V
CC
ICC
Maximum Quiescent
Supply Current
VIN
(Note 5)
or GND
Note 3: All outputs loaded; thresholds on input associated with output under test.
Note 4: Maximum test duration 2.0 ms, one output loaded at a time.
@
@
Note 5:
I
and I
CC
3.0V are guaranteed to be less than or equal to the respective limit 5.5V V
.
IN
CC
3
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DC Electical Characteristics for ACT
=
Symbol
Parameter
VCC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
TA −55˚C to +125˚C
Units
Conditions
Guaranteed Limits
=
VIH
Minimum High Level
Input Voltage
2.0
2.0
0.8
0.8
4.4
5.4
V
V
V
VOUT 0.1V
or VCC − 0.1V
=
VIL
Maximum Low Level
Input Voltage
VOUT 0.1V
or VCC − 0.1V
=
IOUT −50 µA
VOH
Minimum High Level
Output Voltage
=
VIN
V
or VIH
IL
4.5
5.5
4.5
5.5
3.7
4.7
0.1
0.1
V
V
IOH = −24 mA
IOH = −24 mA (Note 6)
=
IOUT 50 µA
VOL
Maximum Low Level
Output Voltage
=
VIN
V
or VIH
IL
4.5
5.5
5.5
0.5
0.5
V
IOL = 24 mA
IOL = 24 mA (Note 6)
=
±
IIN
Maximum Input
Leakage Current
Maximum
1.0
µA
mA
VI
V
CC, GND
=
ICCT
5.5
1.5
VI
V
− 2.1V
CC
ICC/Input
=
VOLD 1.65V Max
IOLD
IOHD
ICC
Minimum Dynamic
5.5
5.5
5.5
50
mA
mA
µA
Output Current (Note 7)
=
VOHD 3.85V Min
−50
80.0
=
V
CC
Maximum Quiescent
Supply Current
VIN
or GND
Note 6: All outputs loaded; thresholds on input associated with output under test.
Note 7: Maximum test duration 2.0 ms, one output loaded at a time.
AC Electrical Characteristics for AC
=
Symbol
Parameter
VCC
TA −55˚C to +125˚C
Units
=
(V)
CL 50 pF
(Note 8)
3.3
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max
15.0
11.0
10.5
8.0
tPLH
Propagation Delay
An or Bn to OA
ns
ns
ns
ns
5.0
=
B
tPHL
tPLH
tPHL
Propagation Delay
An or Bn to OA
3.3
5.0
=
B
Propagation Delay
IA B to OA
3.3
15.0
11.0
10.5
8.0
5.0
=
=
B
Propagation Delay
IA B to OA
3.3
5.0
=
=
B
±
Note 8: Voltage Range 3.3 is 3.3V 0.3V
±
Voltage Range 5.0 is 5.0V 0.5V
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4
AC Electrical Characteristics for ACT
=
Symbol
Parameter
VCC
TA −55˚C to +125˚C
Units
=
(V)
CL 50 pF
(Note 9)
5.0
Min
Max
tPLH
Propagation Delay
An or Bn to OA
1.5
11.0
ns
ns
ns
ns
=
B
tPHL
tPLH
tPHL
Propagation Delay
An or Bn to OA
5.0
5.0
5.0
1.5
1.5
1.5
12.0
7.5
=
B
Propagation Delay
IA B to OA
=
=
B
Propagation Delay
IA B to OA
8.5
=
=
B
±
Note 9: Voltage Range 5.0 is 5.0V 0.5V
Capacitance
Symbol
Parameter
Typ
Units
Conditions
=
VCC OPEN
CIN
Input Capacitance
4.5
40
pF
pF
=
VCC 5.0V
CPD
Power Dissipation Capacitance
5
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Applications
Ripple Expansion
DS100291-6
Parallel Expansion
DS100291-7
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6
7
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Ceramic Leadless Chip Carrier
Package Number E20A
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8
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Ceramic Dual-in-line
J20A
20-Lead Cerpack
Package Number W20A
9
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-
VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-
CONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or sys-
tems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, and whose fail-
ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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