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M74HC280M1RSTN/a772avai9 BIT PARITY GENERATOR
M74HC280RM13TRSTN/a1243avai9 BIT PARITY GENERATOR


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M74HC280M1R-M74HC280RM13TR
9 BIT PARITY GENERATOR
1/9July 2001 HIGH SPEED :
tPD = 22ns (TYP.) at VCC = 6V LOW POWER DISSIPATION:
ICC =4μA(MAX.) at TA=25°C HIGH NOISE IMMUNITY:NIH = VNIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE:OH | = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: PLH ≅ t PHL WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 280
DESCRIPTION

The M74HC280 is an high speed CMOS 9-BIT
PARITY GENERATOR fabricated with silicon gate2 MOS technology.
It is composed of nine data inputs (A to I) and odd/
even parity outputs (ΣODD and ΣEVEN). The 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.
Conversely, 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.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HC280

9 BIT PARITY GENERATOR
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
M74HC280
2/9
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE
LOGIC DIAGRAM
M74HC280
3/9
ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
RECOMMENDED OPERATING CONDITIONS
M74HC280
4/9
DC SPECIFICATIONS
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
CAPACITIVE CHARACTERISTICS

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
M74HC280
5/9
TEST CIRCUIT

CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)

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