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M74HC85M1R ,4-BIT MAGNITUDE COMPARATORLOGIC DIAGRAM This
M74HC85RM13TR ,4-BIT MAGNITUDE COMPARATORlogic diagram has not be used to estimate propagation delays
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M74HC85M1R-M74HC85RM13TR
4-BIT MAGNITUDE COMPARATOR
1/10July 2001 HIGH SPEED :
tPD = 20 ns (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 85
DESCRIPTIONThe M74HC85 is an high speed CMOS 4-BIT
MAGNITUDE COMPARATOR fabricated with
silicon gate C2 MOS technology.
This comparator compares two 4-bit words and
provides an high voltage level on one of the A>B
out, A=B out and A
bit number is easily expanded by cascading
several devices as shown in the typical
application.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HC85
4-BIT MAGNITUDE COMPARATOR
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
M74HC85
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
M74HC85
3/10
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
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
M74HC85
4/10
DC SPECIFICATIONS
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
M74HC85
5/10
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
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
M74HC85
6/10
WAVEFORM : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
