74AC11521DB [TI]
AC SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20;
| 型号： | 74AC11521DB |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | AC SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20 |
| 文件： | 总5页 (文件大小：104K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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54AC11521, 74AC11521
8-BIT IDENTITY COMPARATORS
SCAS022A – D2957, JULY 1987 – REVISED APRIL 1993
• Compares Two 8-Bit Words
54AC11521 . . . J PACKAGE
74AC11521 . . . DB, DW OR N PACKAGE
(TOP VIEW)
• Flow-Through Architecture Optimizes
PCB Layout
• Center-Pin V
and GND Configurations
Minimize High-Speed Switching Noise
CC
Q1
P1
G
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
P2
Q2
P3
Q3
• EPIC (Enhanced-Performance Implanted
Q0
CMOS) 1- m Process
P0
• 500-mA Typical Latch-Up Immunity at 125°C
GND
P = Q
G7
V
CC
• Package Options Include Plastic Small-
Outline Packages, Plastic Shrink
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
P4
Q4
P5
Q5
P7
Q6
P6
54AC11521 . . . FK PACKAGE
(TOP VIEW)
description
These identity comparators perform comparisons
on two 8-bit binary or BCD words. Also included
is a P = Q totem-pole output.
3
2
1
20 19
18
4
5
6
7
8
P2
G
Q4
P5
Q5
P6
Q6
The 54AC11521 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The 74AC11521 is characterized for
operation from – 40°C to 85°C.
17
16
15
14
Q1
P1
Q0
9 10 11 12 13
FUNCTION TABLE
INPUTS
OUTPUT
P = Q
DATA
P, Q
ENABLE
G
†
logic symbol
P = Q
P > Q
P < Q
X
L
L
L
H
H
H
20
G
COMP
G1
L
4
P0
2
0
P
7
H
P1
19
P2
17
P3
14
P4
12
P5
10
P6
8
P7
6
1P = Q
P = Q
3
Q0
1
0
Q1
18
Q2
16
Q3
13
Q
Q4
11
Q5
9
Q6
7
Q7
7
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pins numbers shown are for the DW, J, and N packages.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 1993, 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.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
www.DataSheet4U.com
54AC11521, 74AC11521
8-BIT IDENTITY COMPARATORS
SCAS022A – D2957, JULY 1987 – REVISED APRIL 1993
logic diagram (positive logic)
8
P7
7
Q7
10
P6
9
Q6
12
P5
11
Q5
14
P4
13
Q4
17
P3
6
P = Q
16
Q3
19
P2
18
Q2
2
P1
1
Q1
4
P0
3
Q0
20
G
Pin numbers shown are for the DW, J, and N packages.
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
+ 0.5 V
+ 0.5 V
I
CC
CC
Output voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
O
Input clamp current, I (V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
IK
I
I
CC
Output clamp current, I
(V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA
OK
O O CC
Continuous output current, I (V = 0 to V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA
Continuous current through V
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
O
O
CC
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
†
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.
NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
www.DataSheet4U.com
54AC11521, 74AC11521
8-BIT IDENTITY COMPARATORS
SCAS022A – D2957, JULY 1987 – REVISED APRIL 1993
recommended operating conditions
54AC11521
MIN NOM
74AC11521
MIN NOM
UNIT
MAX
MAX
V
V
Supply voltage
3
2.1
5
5.5
3
2.1
5
5.5
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 3 V
High-level input voltage
= 4.5 V
= 5.5 V
= 3 V
3.15
3.85
3.15
3.85
V
V
IH
0.9
1.35
1.65
0.9
1.35
1.65
V
IL
Low-level input voltage
= 4.5 V
= 5.5 V
V
V
Input voltage
0
0
V
V
0
0
V
V
V
V
I
CC
CC
Output voltage
O
CC
– 4
CC
– 4
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 3 V
I
High-level output current
Low-level output current
= 4.5 V
= 5.5 V
= 3 V
– 24
–24
12
– 24
–24
12
mA
mA
OH
I
= 4.5 V
= 5.5 V
24
24
OL
24
24
t/ v
Input transition rise or fall rate
Operating free-air temperature
0
10
0
10
ns/V
T
–55
125
– 40
85
°C
A
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
A
= 25°C
54AC11521
74AC11521
PARAMETER
TEST CONDITIONS
V
UNIT
CC
MIN
2.9
TYP
MAX
MIN
2.9
4.4
5.4
2.4
3.7
4.7
3.85
MAX
MIN
2.9
MAX
3 V
4.5 V
5.5 V
3 V
I
= – 50
A
4.4
4.4
OH
5.4
5.4
I
I
= – 4 mA
2.58
3.94
4.94
2.48
3.8
OH
V
OH
V
4.5 V
5.5 V
5.5 V
5.5 V
3 V
= – 24 mA
OH
4.8
I
I
= – 50 mA
= – 75 mA
OH
3.85
OH
0.1
0.1
0.1
0.1
0.1
0.1
I
= 50
A
4.5 V
5.5 V
3 V
OL
0.1
0.1
0.1
I
I
= 12 mA
= 24 mA
0.36
0.36
0.36
0.5
0.44
0.44
0.44
OL
V
OL
V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5 V
0.5
OL
0.5
1.65
I
I
= 50 mA
= 75 mA
OL
1.65
± 1
80
OL
I
I
V = V
or GND
or GND,
or GND
± 0.1
± 1
A
A
I
I
CC
CC
CC
V = V
I = 0
O
8
160
CC
I
C
V = V
4
pF
i
I
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
www.DataSheet4U.com
54AC11521, 74AC11521
8-BIT IDENTITY COMPARATORS
SCAS022A – D2957, JULY 1987 – REVISED APRIL 1993
switching characteristics over recommended operating free-air temperature range,
V
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
CC
T
A
= 25°C
TYP
12.5
10.5
7.1
54AC11521
74AC11521
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
1.5
1.5
1.5
1.5
MAX
16.6
14.1
9.8
MIN
1.5
1.5
1.5
1.5
MAX
MIN
1.5
1.5
1.5
1.5
MAX
t
t
t
t
20.4
17.4
11.4
10.8
19
16.1
10.8
10.1
PLH
PHL
PLH
PHL
P or Q
G
P = Q
P = Q
ns
6.4
8.8
switching characteristics over recommended operating free-air temperature range,
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
V
CC
T
A
= 25°C
TYP
8.3
54AC11521
74AC11521
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
1.5
1.5
1.5
1.5
MAX
11.3
10.1
7.1
MIN
1.5
1.5
1.5
1.5
MAX
MIN
1.5
1.5
1.5
1.5
MAX
13
t
t
t
t
14
12.2
8.4
PLH
PHL
PLH
PHL
P or Q
G
P = Q
P = Q
7.2
11.4
7.9
5.1
ns
4.8
7.1
8.6
8.1
operating characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
TEST CONDITIONS
= 50 pF, f = 1 MHz
L
TYP
UNIT
C
Power dissipation capacitance
C
42
pF
pd
PARAMETER MEASUREMENT INFORMATION
V
CC
0 V
PLH
Input
50%
50%
From Output
Under Test
(see Note B)
t
t
PHL
C
= 50 pF
L
500 Ω
(see Note A)
V
OH
CC
50% V
50% V
CC
Output
V
OL
VOLTAGE WAVEFORMS
LOAD CIRCUIT
NOTES: A.
C includes probe and jig capacitance.
L
B. Input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z = 50 Ω, t = 3 ns, t = 3 ns.
O
r
f
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
www.DataSheet4U.com
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