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74ACT280 PDF даташит

Спецификация 74ACT280 изготовлена ​​​​«STMicroelectronics» и имеет функцию, называемую «9 BIT PARITY GENERATOR/CHECKER».

Детали детали

Номер произв 74ACT280
Описание 9 BIT PARITY GENERATOR/CHECKER
Производители STMicroelectronics
логотип STMicroelectronics логотип 

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74ACT280 Даташит, Описание, Даташиты
® 74ACT280
9 BIT PARITY GENERATOR/CHECKER
s HIGH SPEED: tPD = 4 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
s COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN), VIL = 0.8V (MAX)
s 50TRANSMISSION LINE DRIVING
CAPABILITY
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24 mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH tPHL
s OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 280
s IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The AC280 is an advanced high-speed CMOS 9
BIT PARITY GENERATOR - CHECKER
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology. It is
ideal for low power applications mantaining high
speed operation similar to eqivalent Bipolar
Schottky TTL.
It is composed of nine data inputs (A to I) and
odd/even parity outputs (ΣODD and ΣEVEN). The
PIN CONNECTION AND IEC LOGIC SYMBOLS
BM
(Plastic Package)
(Micro Package)
ORDER CODES :
74ACT280B
74ACT280M
nine data inputs control the output conditions.
When the number of high level input is odd,
ΣODD output is kept high and ΣEVEN output low.
Conservely, when the output is even, ΣEVEN
output is kept high and ΣODD low.
The IC generates either odd or even parity
making it flexible application.
The word-length capability is easily expanded by
cascading.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
December 1998
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74ACT280 Даташит, Описание, Даташиты
74ACT280
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
5, 6
8, 9, 10, 11,
12, 13, 1, 2,
4
3
7
14
S Y M B OL
ΣEVEN
ΣODD
A to I
NC
GND
VCC
NAME AND FUNCTION
Parity Outputs
Data Inputs
No Connection
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
NUMBER OF INPUT A TRHU I THAT ARE HIGH
0, 2, 4, 6, 8
1, 3, 5, 7, 9
LOGIC DIAGRAM
ΣEVEN
H
L
OUTPUT
ΣODD
L
H
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74ACT280 Даташит, Описание, Даташиты
74ACT280
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7
V
VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
± 20 mA
IOK DC Output Diode Current
± 20 mA
IO DC Output Current
± 50 mA
ICC or IGND DC VCC or Ground Current
± 200
mA
Tstg Storage Temperature
-65 to +150
oC
TL Lead Temperature (10 sec)
300 oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Pa ram et er
VCC Supply Voltage
VI Input Voltage
VO Output Voltage
Top Operating Temperature:
dt/dv Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1)
1) VIN from 0.8 V to 2.0 V
Value
4.5 to 5.5
0 to VCC
0 to VCC
-40 to +85
8
Unit
V
V
V
oC
ns/V
DC SPECIFICATIONS
Symb ol
Parameter
Test Conditions
VCC
(V)
Valu e
TA = 25 oC
-40 to 85 oC
Min. T yp. Max. Min. Max.
VIH High Level Input Voltage
4.5
5.5
VO = 0.1 V or
VCC - 0.1 V
2.0 1.5
2.0 1.5
2.0
2.0
VIL Low Level Input Voltage
4.5
5.5
VO = 0.1 V or
VCC - 0.1 V
1.5 0.8
1.5 0.8
0.8
0.8
VOH High Level Output
Voltage
VOL Low Level Output
Voltage
4.5 VI(* ) = IO=-50 µA 4.4 4.49
5.5 VIH or IO=-50 µA 5.4 5.49
4.5 VIL IO=-24 mA 3.86
4.4
5.4
3.76
5.5 IO=-24 mA 4.86
4.76
4.5 VI(* ) = IO=50 µA
5.5 VIH or IO=50 mA
4.5 VIL IO=24 mA
0.001
0.001
0.1
0.1
0.36
0.1
0.1
0.44
II Input Leakage Current
5.5 IO=24 mA
5.5 VI = VCC or GND
0.36
±0.1
0.44
±1
ICCT Max ICC /Input
5.5 VI = VCC -2.1 V
0.6
1.5
ICC Quiescent Supply
Current
5.5 VI = VCC or GND
4 40
IOLD Dynamic Output Current 5.5 VOLD = 1.65 V max
IOHD (note 1, 2)
VOHD = 3.85 V min
1) Maximum test duration 2ms, one output loaded attime
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 .
75
-75
Unit
V
V
V
V
µA
mA
µA
mA
mA
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