74AC11520N [TI]
8-BIT IDENTITY COMPARATOR;
| 型号： | 74AC11520N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 8-BIT IDENTITY COMPARATOR 光电二极管 逻辑集成电路 |
| 文件： | 总7页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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74AC11520
8-BIT IDENTITY COMPARATOR
SCAS025C – JULY 1987 – REVISED APRIL 1996
DW OR N PACKAGE
(TOP VIEW)
Compares Two 8-Bit Words
Center-Pin V
Minimize High-Speed Switching Noise
and GND Configurations
CC
Q1
P1
1
2
3
4
5
6
7
8
9
10
20
G
EPIC (Enhanced-Performance Implanted
CMOS) 1- m Process
19 P2
18
17
16
15
14
13
12
11
Q0
P0
GND
P = Q
Q7
Q2
P3
Q3
500-mA Typical Latch-Up Immunity at
125°C
Equivalent of 20-k Pullup Resistor on
Q Inputs
V
CC
P4
Q4
P5
Q5
P7
Q6
P6
Package Options Include Plastic
Small-Outline Packages (DW) and Standard
Plastic 300-mil DIPs (N)
description
This identity comparator performs comparisons on two 8-bit binary or BCD words. Features include 20-kΩ
pullup termination resistors on the Q inputs for analog or switch data and a P = Q totem-pole output.
The 74AC11520 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OUTPUT
P = Q
DATA
P, Q
ENABLE
G
P = Q
P > Q
P < Q
X
L
L
L
H
H
H
L
H
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 1996, 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
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74AC11520
8-BIT IDENTITY COMPARATOR
SCAS025C – JULY 1987 – REVISED APRIL 1996
†
logic symbol
COMP
20
G1
0
G
P0
P1
P2
P3
P4
P5
P6
P7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
4
2
19
17
14
12
10
8
P
6
1P=Q
P = Q
7
0
3
1
18
16
13
11
9
Q
7
7
†
This symbol is in accordance with ANSI/IEEE Std 91–1984 and IEC Publication 617–12.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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74AC11520
8-BIT IDENTITY COMPARATOR
SCAS025C – JULY 1987 – REVISED APRIL 1996
logic diagram (positive logic)
8
P7
Q7
P6
Q6
P5
Q5
P4
Q4
P3
Q3
P2
Q2
P1
Q1
P0
Q0
G
7
10
9
12
11
14
13
17
16
19
18
2
6
P = Q
1
4
3
20
schematic of Q inputs
V
CC
Input
GND
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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74AC11520
8-BIT IDENTITY COMPARATOR
SCAS025C – JULY 1987 – REVISED APRIL 1996
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 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
Maximum power dissipation at T = 55°C (in still air) (see Note 2): DW package . . . . . . . . . . . . . . . . . . 1.6 W
O
O
CC
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
A
N package . . . . . . . . . . . . . . . . . . . . 1.3 W
Storage temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150 C and a board trace length of 750 mils,
except for the N package, which has a trace length of zero.
recommended operating conditions
MIN NOM
MAX
UNIT
V
Supply voltage
3
2.1
5
5.5
V
CC
IH
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 3 V
V
High-level input voltage
= 4.5 V
= 5.5 V
= 3 V
3.15
3.85
V
V
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
V
V
I
CC
Output voltage
O
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
mA
mA
OH
I
= 4.5 V
= 5.5 V
24
OL
24
t/ v
Input transition rise or fall rate
Operating free-air temperature
0
10
ns/V
T
–40
85
°C
A
4
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74AC11520
8-BIT IDENTITY COMPARATOR
SCAS025C – JULY 1987 – REVISED APRIL 1996
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
A
= 25°C
TYP
PARAMETER
TEST CONDITIONS
V
MIN
MAX
UNIT
CC
MIN
2.9
MAX
3 V
2.9
2.9
4.4
I
= –50
A
4.5 V
5.5 V
3 V
4.4
OH
5.4
5.4
V
OH
I
I
I
= –4 mA
= –24 mA
= –75 mA
2.58
3.94
4.94
2.48
3.8
V
OH
OH
OH
4.5 V
5.5 V
5.5 V
3 V
4.8
3.85
0.1
0.1
0.1
0.1
0.1
0.44
0.44
0.44
1.65
10
I
= 50
A
4.5 V
5.5 V
3 V
OL
0.1
V
OL
I
I
I
= 12 mA
= 24 mA
= 75 mA
0.36
0.36
0.36
V
OL
OL
OL
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5 V
I
I
I
V = V
,
Q inputs only
Q inputs only
10
–0.6
±0.1
4.8
A
mA
A
IH
I
CC
V = GND,
–0.3
2.3
–1
IL
I
I
V = V
or GND,
CC
P and G inputs only
±1
I
Q inputs at GND,
Q inputs open,
Other inputs V = V
or GND
or GND
8
mA
A
I
CC
CC
I
CC
Other inputs V = V
8
80
I
C
V = V or GND
CC
3.5
pF
i
I
†
Not more than one output or input should be tested at a time and the duration of the test should not exceed 10 ms.
switching characteristics over recommended operating free-air temperature range,
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
V
CC
T
A
= 25°C
TYP
12
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
MIN
MAX
UNIT
ns
MIN
1.5
1.5
1.5
1.5
MAX
16.5
14.4
9
t
t
t
t
1.5
1.5
1.5
1.5
18.6
16.3
10
PLH
PHL
PLH
PHL
P or Q
G
P = Q
P = Q
10.4
6.9
ns
6.3
8.6
9.5
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
8.1
FROM
(INPUT)
TO
(INPUT)
PARAMETER
MIN
MAX
UNIT
ns
MIN
1.5
1.5
1.5
1.5
MAX
11.1
10.1
6.6
t
t
t
t
1.5
1.5
1.5
1.5
12.6
11.3
7.4
PLH
PHL
PLH
PHL
P or Q
G
P = Q
P = Q
7.1
4.9
ns
4.8
7.1
7.8
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
www.DataSheet4U.com
74AC11520
8-BIT IDENTITY COMPARATOR
SCAS025C – JULY 1987 – REVISED APRIL 1996
operating characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
Power dissipation capacitance
TEST CONDITIONS
TYP
UNIT
C
C
= 50 pF,
L
f = 1 MHz
42
pF
pd
PARAMETER MEASUREMENT INFORMATION
V
CC
0 V
PLH
Input
(see Note B)
50% V
CC
From Output
Under Test
50% V
CC
t
t
PHL
C
= 50 pF
L
500 Ω
(see Note A)
V
OH
50% V
CC
50% V
CC
Output
V
OL
LOAD CIRCUIT
C includes probe and jig capacitance.
L
VOLTAGE WAVEFORMS
NOTES: A.
B. Input pulses are supplied by generators having the following characteristics: PRR ≤ 1 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
TYPICAL CHARACTERISTICS
Q INPUT CURRENT
vs
INPUT VOLTAGE
0
V
T
A
= 5 V,
= 25°C
CC
– 50
– 100
– 150
– 200
– 250
– 300
0
1
2
3
4
5
6
V – Input Voltage – V
I
Figure 2
6
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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