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74ACT280 반도체 회로 부품 판매점

9 BIT PARITY GENERATOR/CHECKER



STMicroelectronics 로고
STMicroelectronics
74ACT280 데이터시트, 핀배열, 회로
® 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 데이터시트, 핀배열, 회로
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

9 BIT PARITY GENERATOR/CHECKER - STMicroelectronics



74ACT280B

9 BIT PARITY GENERATOR/CHECKER - STMicroelectronics



74ACT280M

9 BIT PARITY GENERATOR/CHECKER - STMicroelectronics