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M74HC4078B1RSTN/a102avai8 INPUT NOR/OR GATE
M74HC4078M1RSTN/a12580avai8 INPUT NOR/OR GATE
M74HC4078RM13TRSTN/a15000avai8 INPUT NOR/OR GATE


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M74HC4078B1R-M74HC4078M1R-M74HC4078RM13TR
8 INPUT NOR/OR GATE
1/8July 2001 HIGH SPEED:
tPD = 10ns (TYP.) at VCC = 6V LOW POWER DISSIPATION:
ICC = 1μA(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 4078
DESCRIPTION

The M74HC4078 is an high speed CMOS
8-INPUT NOR/OR GATE fabricated with silicon
gate C2 MOS technology.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HC4078

8-INPUT NOR/OR GATE
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
M74HC4078
2/8
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE
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
M74HC4078
3/8
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
M74HC4078
4/8
TEST CIRCUIT

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


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