SN54AL520 [TI]
8-BIT IDENTITY COMPARATORS; 8位身份比较仪
| 型号： | SN54AL520 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 8-BIT IDENTITY COMPARATORS |
| 文件： | 总9页 (文件大小：140K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
SN54ALS520 . . . J PACKAGE
SN74ALS518, SN74ALS520,
SN74ALS521 . . . DW OR N PACKAGE
• Compare Two 8-Bit Words
• Choice of Totem-Pole or Open-Collector
Outputs
(TOP VIEW)
• SN74ALS518 and ′ALS520 Have 20-kΩ
G
P0
Q0
P1
Q1
P2
Q2
P3
Q3
V
CC
P = Q/P = Q
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
Pullup Resistors on Q Inputs
†
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
Q7
P7
Q6
P6
Q5
INPUT
PULLUP
RESISTOR
OUTPUT FUNCTION
AND
CONFIGURATION
13 P5
12 Q4
TYPE
11
GND
P4
SN74ALS518
′ALS520
Yes
Yes
No
P = Q open collector
P = Q totem pole
P = Q totem pole
†
P = Q for SN74ALS518
P = Q for ′ALS520 and SN74ALS521
‡
SN74ALS521
‡
SN74ALS521 is identical to ′ALS688.
SN54ALS520 . . . FK PACKAGE
(TOP VIEW)
description
These identity comparators perform comparisons
on two 8-bit binary or BCD words. The
SN74ALS518 provides P = Q outputs, while the
′ALS520 and SN74ALS521 provide P = Q
outputs. The SN74ALS518 has an open-collector
output. The SN74ALS518 and ′ALS520 feature
20-kΩ pullup resistors on the Q inputs for analog
or switch data.
3
2
1
20 19
18
Q7
P7
Q6
P6
Q5
P1
Q1
P2
Q2
P3
4
5
6
7
8
17
16
15
14
9 10 11 12 13
The SN54ALS520 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74ALS518, SN74ALS520, and
SN74ALS521 are characterized for operation
from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUTS
DATA ENABLE
P = Q
P = Q
P, Q
P = Q
P > Q
P < Q
X
G
L
H
L
L
L
L
L
H
H
H
L
H
Copyright 1995, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
†
logic symbols
′ALS520
SN74ALS521
SN74ALS518
COMP
COMP
1
1
G1
G1
G
P0
P1
P2
P3
P4
P5
P6
P7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
G
P0
P1
P2
P3
P4
P5
P6
P7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
2
0
0
4
4
6
6
8
8
11
13
15
17
3
P
11
13
15
17
3
P
19
19
1P=Q
P = Q
1P=Q
P = Q
7
0
7
0
5
5
7
7
9
9
Q
Q
12
14
16
18
12
14
16
18
7
7
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
logic diagrams (positive logic)
SN74ALS518
17
P7
18
Q7
15
P6
16
Q6
13
P5
14
Q5
11
P4
12
Q4
19
P = Q
8
P3
9
Q3
6
P2
7
Q2
4
P1
5
Q1
2
P0
3
Q0
1
G
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
logic diagrams (positive logic) (continued)
′ALS520
SN74ALS521
17
P7
18
Q7
15
P6
16
Q6
13
P5
14
Q5
11
P4
12
Q4
19
P = Q
8
P3
9
Q3
6
P2
7
Q2
4
P1
5
Q1
2
P0
3
Q0
1
G
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : Q inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V + 0.5 V or 5.5 V, whichever is less
I
CC
All other inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Off-state output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range, T : SN74ALS518 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN74ALS518
MIN NOM MAX
UNIT
V
V
V
V
Supply voltage
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output voltage
Low-level output current
Operating free-air temperature
IH
0.8
5.5
24
V
IL
V
OH
I
mA
°C
OL
T
A
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74ALS518
PARAMETER
TEST CONDITIONS
UNIT
‡
MIN TYP
MAX
–1.5
0.1
V
IK
V
V
= 4.5 V,
I = –18 mA
I
V
CC
I
= 5.5 V,
V
OH
= 5.5 V
mA
OH
CC
I
I
= 12 mA
= 24 mA
0.25
0.35
0.4
OL
V
V
V
V
= 4.5 V
V
OL
CC
CC
CC
0.5
OL
Q inputs
V = 5.5 V
0.1
I
I
I
= 5.5 V
= 5.5 V,
mA
All other inputs
Q inputs
V = 7 V
I
0.1
–0.2
20
mA
V = 2.7 V
I
I
IH
All other inputs
Q inputs
µA
–0.6
–0.1
17
V
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
I
mA
mA
I
I
CC
IL
All other inputs
See Note 1
11
CC
CC
‡
All typical values are at V
= 5 V, T = 25°C.
A
CC
is measured with G grounded, and P and Q at 4.5 V.
NOTE 1:
I
CC
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
switching characteristics (see Figure 1)
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
L
= 680 Ω,
FROM
(INPUT)
TO
(OUTPUT)
†
PARAMETER
UNIT
T
A
= MIN to MAX
SN74ALS518
MIN
15
3
MAX
33
t
t
t
t
PLH
PHL
PLH
PHL
ns
ns
P or Q
G
P = Q
P = Q
15
15
3
33
15
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : Q inputs of ′ALS520 . . . . . . . . . . . . . . . . . . . . . . . . . V + 0.5 V or 5.5 V, whichever is less
I
CC
All other inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range, T : SN54ALS520 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
A
SN74ALS520, SN74ALS521 . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN74ALS520
SN74ALS521
SN54ALS520
MIN NOM MAX
UNIT
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.7
–1
0.8
–2.6
24
V
IL
I
I
mA
mA
°C
OH
12
OL
T
A
–55
125
0
70
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74ALS520
SN54ALS520
SN74ALS521
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
V
V
V
V
= 4.5 V,
I = –18 mA
–1.5
–1.5
V
IK
CC
I
= 4.5 V to 5.5 V,
I
I
I
I
I
= – 0.4 mA
= – 1 mA
= – 2.6 mA
= 12 mA
V
–2
V
CC
–2
CC
OH
OH
OH
OL
OL
CC
2.4
3.3
V
OH
V
CC
V
CC
V
CC
V
CC
= 4.5 V
= 4.5 V
= 5.5 V
= 5.5 V,
2.4
3.2
0.25
0.35
0.25
0.4
0.4
0.5
V
OL
V
= 24 mA
′ALS520 Q inputs
All other inputs
′ALS520 Q inputs
All other inputs
′ALS520 Q inputs
All other inputs
V = 5.5 V
I
0.1
0.1
0.1
I
I
mA
V = 7 V
I
0.1
–0.2
20
–0.2
20
mA
V = 2.7 V
I
I
IH
IL
µA
–0.6
–0.1
–112
19
–0.6
–0.1
–112
19
V
CC
V
CC
V
CC
= 5.5 V,
= 5.5 V,
= 5.5 V,
V = 0.4 V
I
mA
mA
mA
I
I
I
‡
V
O
= 2.25 V
–20
–30
O
′ALS520
12
12
12
12
See Note 1
CC
SN74ALS521
19
19
†
‡
All typical values are at V
= 5 V, T = 25°C.
A
CC
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
NOTE 1:
I
is measured with G grounded, and P and Q at 4.5 V.
CC
switching characteristics (see Figure 1)
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
L
= 500 Ω,
§
FROM
TO
(OUTPUT)
T
A
= MIN to MAX
PARAMETER
(INPUT)
UNIT
SN74ALS520
SN74ALS521
SN54ALS520
MIN
3
MAX
19
MIN
3
MAX
12
t
t
t
t
PLH
PHL
PLH
PHL
ns
ns
P or Q
G
P = Q
P = Q
3
25
5
20
2
18
2
12
5
23
5
22
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
7 V
R
= R1 = R2
V
CC
L
S1
R1
R
L
Test
Point
From Output
Under Test
From Output
Under Test
Test
Point
Test
Point
From Output
Under Test
C
C
L
R
L
R2
L
C
L
(see Note A)
(see Note A)
(see Note A)
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
3.5 V
3.5 V
Timing
Input
High-Level
1.3 V
1.3 V
1.3 V
Pulse
0.3 V
0.3 V
t
h
t
w
t
su
3.5 V
3.5 V
0.3 V
Data
Input
Low-Level
1.3 V
1.3 V
1.3 V
1.3 V
Pulse
0.3 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
3.5 V
0.3 V
Output
Control
(low-level
enabling)
1.3 V
1.3 V
3.5 V
t
PZL
Input
1.3 V
1.3 V
t
PLZ
0.3 V
PHL
3.5 V
t
Waveform 1
S1 Closed
(see Note B)
t
PLH
1.3 V
V
OH
In-Phase
Output
1.3 V
1.3 V
1.3 V
V
OL
0.3 V
V
OL
t
PHZ
t
PLH
t
PZH
t
PHL
V
OH
V
Waveform 2
S1 Open
(see Note B)
OH
OL
Out-of-Phase
Output
(see Note C)
1.3 V
1.3 V
0.3 V
V
0 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A.
C includes probe and jig capacitance.
L
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, t = t = 2 ns, duty cycle = 50%.
r
f
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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Copyright 1998, Texas Instruments Incorporated
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