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Toshiba Electronic Components Datasheet

TC74HC85AF Datasheet

4-Bit Magnitude Comparator

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TC74HC85AP/AF
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC85AP, TC74HC85AF
4-Bit Magnitude Comparator
The TC74HC85A is a high speed CMOS 4 BIT MAGNITUDE
COMPARATOR fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
The TC74HC85A compares tow 4-bit words applied to inputs
A0-A3 and B0-B3, and provides a high voltage level on one of
three outputs: A > B, A < B, or A = B.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
High speed: tpd = 22 ns (typ.) at VCC = 5 V
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
High noise immunity: VNIH = VNIL = 28% VCC (min)
Output drive capability: 10 LSTTL loads
Symmetrical output impedance: |IOH| = IOL = 4 mA (min)
Balanced propagation delays: tpLH ∼− tpHL
Wide operating voltage range: VCC (opr) = 2 to 6 V
Pin and function compatible with 74LS85
Pin Assignment
TC74HC85AP
TC74HC85AF
Weight
DIP16-P-300-2.54A
SOP16-P-300-1.27A
: 1.00 g (typ.)
: 0.18 g (typ.)
Start of commercial production
1987-11
1
2014-03-01


Toshiba Electronic Components Datasheet

TC74HC85AF Datasheet

4-Bit Magnitude Comparator

No Preview Available !

IEC Logic Symbol
TC74HC85AP/AF
Truth Table
Comparing Inputs
A3 > B3
A3 = B3
A3 = B3
A3 = B3
X
A2 > B2
A2 = B2
A2 = B2
X
X
A1 > B1
A1 = B1
X
X
X
A0 > B0
A3 = B3, A2 = B2, A1 = B1, A0 = B0
A3 = B3
A3 = B3
A3 = B3
A3 < B3
A2 = B2
A2 = B2
A2 < B2
X
A1 = B1
A1 < B1
X
X
A0 < B0
X
X
X
Cascading Inputs
Outputs
A>B A<B A=B A>B A<B A=B
X
X
X
H
L
L
X
X
X
H
L
L
X
X
X
H
L
L
X
X
X
H
L
L
L
L
L
H
H
L
X
X
H
L
L
H
L
H
L
L
H
L
H
L
L
H
L
L
H
H
L
L
L
L
X
X
X
L
H
L
X
X
X
L
H
L
X
X
X
L
H
L
X
X
X
L
H
L
X: Don’t care
2
2014-03-01


Part Number TC74HC85AF
Description 4-Bit Magnitude Comparator
Maker Toshiba
PDF Download

TC74HC85AF Datasheet PDF






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