TC74AC521FW-ELP [TOSHIBA]
IC AC SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20, 0.300 INCH, PLASTIC, SOIC-20, Arithmetic Circuit;
| 型号： | TC74AC521FW-ELP |
| 厂家： | 
TOSHIBA |
| 描述： | IC AC SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20, 0.300 INCH, PLASTIC, SOIC-20, Arithmetic Circuit 光电二极管 输出元件 逻辑集成电路 |
| 文件： | 总3页 (文件大小：217K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TOSHIBA
TC74AC Series
TC74AC520
TC74AC521
520: with Pull-up Resistor
Features:
The TC74AC520 and TC74AC521 are advanced high speed
CMOS 8-BIT DIGITAL COMPARATORS fabricated with sili-
con gate and double-layer metal wiring C MOS technology.
They achieve the high speed operation similar to equivalent
Bipolar Schottky TTL, while maintaining the CMOS low
power dissipation.
They compare two 8-bit binary or BCD words applied
inputs P0~P7, and inputs Q0~Q7, and indicate whether or
not they are equal.
The TC74AC520 is equipped with pull-up resistors (20Ω
typ.) to inputs Q0~Q7 and features pull-up resistors on the Q
inputs for switch data.
A signal active low enable is provided to facilitate cascad-
ing of several packages to compare words greater than 8
bits.
•
•
High Speed: tpd = 6.4ns (typ.) at VCC = 5V
2
Low Power Dissipation: ICC = 8µA (max.) at Ta =
25°C*
•
•
High Noise Immunity: VNIH = VNIL = 28% VCC (min.)
Symmetrical Output Impedance: ❙IOH❙ = IOL = 24mA
(min.). Capability of driving 50Ω transmission lines.
•
•
•
•
Balanced Propagation Delays: tpLH = tpHL
Wide Operating Voltage Range: VCC (opr) = 2V~5.5V
Pin and Function Compatible with 74F521
Available in DIP, SOIC and SOP Packages
* for AC521 only
All inputs are equipped with protection circuits against
static discharge or transient excess voltage.
Pin Assignment
IEC Logic Symbol
G
1
2
3
4
5
6
7
8
9
20
V
CC
P0
Q0
P1
Q1
P2
Q2
P3
Q3
19 P=Q
18 Q7
17 P7
16 Q6
15 P6
14 Q5
13 P5
12 Q4
11 P4
COMP
(1)
(2)
EN
G
P0
P1
P2
P3
P4
P5
P6
P7
0
(4)
(6)
(8)
P
(11)
(13)
(15)
(17)
7
0
GND 10
(19)
P=Q
P=Q
(3)
(5)
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
(TOP VIEW)
(7)
(9)
Truth Table
INPUTS
Q
(12)
(14)
(16)
(18)
OUTPUT
P, Q
G
P = Q
7
P = Q
P ≠ Q
X
L
L
L
H
H
H
X: Don’t Care
The information contained here is subject to change without notice.
The information contained herein is presented only as guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties
which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. These TOSHIBA products are intended for usage in general electronic
equipments (office equipment, communication equipment, measuring equipment, domestic electrification, etc.) Please make sure that you consult with us before you use these TOSHIBA products in equip-
ments which require high quality and/or reliability, and in equipments which could have major impact to the welfare of human life (atomic energy control, spaceship, traffic signal, combustion control, all types
of safety devices, etc.). TOSHIBA cannot accept liability to any damage which may occur in case these TOSHIBA products were used in the mentioned equipments without prior consultation with TOSHIBA.
TOSHIBA CORPORATION
1/3
TC74AC520
TC74AC521
Absolute Maximum Ratings
PARAMETER
SYMBOL
VALUE
UNIT
* 500mW in the range of Ta = -40°C~65°C.
From Ta = 65°C to 85°C a derating factor of
-10mW/°C should be applied up to 300mW.
Supply Voltage Range
DC Input Voltage
V
-0.5~7.0
V
V
CC
V
-0.5~V + 0.5
CC
IN
DC Output Voltage
Input Diode Current
Output Diode Current
DC Output Current
V
-0.5~V + 0.5
V
OUT
CC
I
±20
mA
mA
mA
mA
mW
°C
°C
IK
I
±50
OK
I
±50
±100
OUT
DC V /Ground Current
I
CC
CC
Power Dissipation
Storage Temperature
Lead Temperature 10sec
P
500 (DIP) */180 (SOP)
-65~150
D
T
stg
T
300
L
Recommended Operating Conditions
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
Input Voltage
V
2.0~5.5
V
V
CC
V
0~V
0~V
IN
CC
CC
Output Voltage
V
V
OUT
Operating Temperature
T
-40~85
0~100 (V = 3.3±0.3V)
°C
opr
CC
Input Rise and Fall Time
dt/dv
ns/v
0~20 (V = 5±0.5V)
CC
DC Electrical Characteristics
Ta = 25°C
Ta = -40~85°C
Min. Max.
PARAMETER
SYMBOL
TEST CONDITION
UNIT
V
Min.
Typ.
Max.
CC
2.0
3.0
5.5
2.0
3.0
5.5
2.0
3.0
4.5
3.0
4.5
5.5
2.0
3.0
4.5
3.0
4.5
5.5
1.50
2.10
3.85
—
—
—
—
—
—
—
2.0
3.0
4.5
—
—
—
0.0
0.0
0.0
—
—
—
—
—
1.50
2.10
3.85
—
—
—
High-Level Input Voltage
V
—
—
V
IH
—
—
0.50
0.90
1.65
—
0.50
0.90
1.65
—
Low-Level Input Voltage
High-Level Output Voltage
V
—
—
V
V
IL
—
—
1.9
2.9
4.4
2.58
3.94
—
1.9
2.9
4.4
2.48
3.80
3.85
—
I
= -50µA
—
—
OH
—
—
V
V
= V V
IH or IL
OH
IN
I
= -4mA
= -24mA
= -75mA*
—
—
OH
I
—
—
OH
I
—
—
OH
—
0.1
0.1
0.1
0.36
0.36
—
0.1
0.1
0.1
0.44
0.44
1.65
I
I
= 50µA
—
—
OL
OL
—
—
Low-Level Output Voltage
V
V
= V V
IH or IL
V
OL
IN
=12mA
= 24mA
= 75mA*
—
—
I
—
—
OL
I
—
—
OL
* This spec indicates the capability of driving 50Ω transmission lines.
One output should be tested at a time for a 10ms maximum duration.
2/3
TOSHIBA CORPORATION
TC74AC520
TC74AC521
System Diagram
G
2
3
18
17
P0
Q0
Q7
P7
1
4
5
16
15
P1
Q1
Q6
P6
6
7
14
13
P2
Q2
Q5
P5
8
9
12
11
P3
Q3
Q4
P4
19
P = Q
Note: AC520 is equipped with pull-up resistors (20k Ωtyp.) to inputs Q ~ Q .
0
7
DC Electrical Characteristics
i) AC520
Ta = 25°C
Ta = -40~85°C
PARAMETER
SYMBOL
TEST CONDITION
UNIT
V
Min.
Typ.
Max.
Min.
Max.
CC
P and G inputs only
Input Leakage Current
High-Level Input Current
Low-Level Input Current
I
I
5.5
5.5
5.5
—
—
—
±1.0
—
±1.0
µA
µA
IN
V
= V or GND
IN
CC
Q inputs only
= V
—
—
10
—
—
10
IH
V
IN
CC
Q inputs only
= GND
I
–0.3
–0.6
–1.0
mA
IL
V
IN
Q inputs open
P and G inputs, V = V or
5.5
5.5
—
—
—
8.0
4.8
—
—
80.0
8.0
µA
IN
CC
GND
Quiescent Supply Current
I
CC
Q inputs, V = GND
IN
P and G inputs, V = V or
mA
IN
CC
GND
ii) AC521
Ta = 25°C
Ta = -40~85°C
PARAMETER
SYMBOL
TEST CONDITION
UNIT
V
Min.
Typ.
Max.
Min.
Max.
CC
5.5
5.5
Input Leakage Current
I
V
V
= V or GND
—
—
—
—
±0.1
—
—
±1.0
IN
IN
CC
µA
Quiescent Supply Current
I
= V or GND
8.0
80.0
CC
IN
CC
AC Electrical Characteristics (C = 50pF, R = 500Ω, Input t = t = 3ns)
L
L
r
f
Ta = 25°C
Ta = -40~85°C
PARAMETER
SYMBOL
TEST CONDITION
UNIT
V
Min.
Typ.
Max.
Min.
Max.
CC
t
t
t
t
3.0±0.3
5.0±0.5
3.0±0.3
5.0±0.5
—
—
—
—
—
—
—
10.5
7.2
7.2
4.8
5
17.5
11.0
11.5
7.0
1.0
1.0
1.0
1.0
—
—
20.0
12.5
13.0
8.0
Propagation Delay Time
(Pn, Qn–P=Q)
pLH
pHL
pLH
pHL
—
—
ns
pF
Propagation Delay Time
(G–P=Q)
Input Capacitance
C
—
—
10
10
IN
1
Power Dissipation Capacitance
C
—
34
—
—
PD
Note (1):
C
is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
PD
Average operating current can be obtained by the equation: I
= C • V • f + I
.
CC (opr)
PD
CC
IN
CC
TOSHIBA CORPORATION
3/3
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