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M74HC85RM13TR

P1-P3P4-P6P7-P9P10-P10
1/10July 2001
■ HIGH SPEED :
t
PD
= 20 ns (TYP.) at V
CC
= 6V
■ LOW POWER DISSIPATION:
I
CC
=4µA(MAX.) at T
A
=25°C
■ HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 4mA (MIN)
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ WIDE OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 6V
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 85
DESCRIPTION
The M74HC85 is an high speed CMOS 4-BIT
MAGNITUDE COMPARATOR fabricated with
silicon gate C
2
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<B out outputs. The comparing
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
PACKAGE TUBE T & R
DIP M74HC85B1R
SOP M74HC85M1R M74HC85RM13TR
TSSOP M74HC85TTR
TSSOPDIP SOP
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
M74HC85
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
PIN No SYMBOL NAME AND FUNCTION
2
IN
A<B
A<B Expansion Input
3
IN
A=B
A=B Expansion Input
4
IN
A>B
A>B Expansion Input
5
OUT
A>B
A>B Expansion Output
6
OUT
A=B
A=B Expansion Output
7
OUT
A<B
A<B Expansion Output
9, 11, 14, 1
B
0
to B
3
Word B Inputs
10, 12, 13,
15
A
0
to A
3
Word A Inputs
8 GND Ground (0V)
16 Vcc Positive Supply Voltage
COMPARING INPUTS
CASCADING INPUTS OUTPUTS
A>B A<B A=B A>B A<B A=B
A3 > B3 X X X X X X H L L
A3 = B3 A2 > B2 X X X X X H L L
A3 = B3 A2 = B2 A1 > B1 X X X X H L L
A3 = B3 A2 = B2 A1 = B1 A0 > B0 X X X H L L
A3 = B3 A2 = B2 A1 = B1 A0 = B0
LLLHHL
XXHLLH
LHLLHL
HLLHLL
HHLLLL
A3 = B3 A2 = B2 A1 = B1 A0 < B0 X X X L H L
A3 = B3 A2 = B2 A1 > B1 X X X X L H L
A3 = B3 A2 < B2 X X X X X L H L
A3 < B3 X X X X X X L H L
Obsolete Product(s) - Obsolete Product(s)
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
Symbol Parameter Value Unit
V
CC
Supply Voltage
-0.5 to +7 V
V
I
DC Input Voltage -0.5 to V
CC
+ 0.5
V
V
O
DC Output Voltage -0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
± 20 mA
I
OK
DC Output Diode Current
± 20 mA
I
O
DC Output Current
± 25 mA
I
CC
or I
GND
DC V
CC
or Ground Current
± 50 mA
P
D
Power Dissipation
500(*) mW
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
Symbol Parameter Value Unit
V
CC
Supply Voltage
2 to 6 V
V
I
Input Voltage 0 to V
CC
V
V
O
Output Voltage 0 to V
CC
V
T
op
Operating Temperature
-55 to 125 °C
t
r
, t
f
Input Rise and Fall Time V
CC
= 2.0V
0 to 1000 ns
V
CC
= 4.5V
0 to 500 ns
V
CC
= 6.0V
0 to 400 ns
P1-P3P4-P6P7-P9P10-P10

M74HC85RM13TR

Mfr. #:
Buy M74HC85RM13TR
Manufacturer:
STMicroelectronics
Description:
Logic Comparators 4-Bit Magnitude Comp
Lifecycle:
New from this manufacturer.
Delivery:
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