Datasheet M74HC85TTR, M74HC85RM13TR, M74HC85M1R, M74HC85B1R Datasheet (SGS Thomson Microelectronics)

M74HC85

4-BIT MAGNITUDE COMPARATOR

■ HIGH SPEED :

t

= 20 ns (TYP.) at VCC = 6V

PD

■ LOW POWER DISSIPATION:

I

=4µA(MAX.) at TA=25°C

CC

■ HIGH NOISE IMMUNITY:

V

= V

NIH

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

| = IOL = 4mA (MIN)

OH

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

■ WIDE OPERATING VOLTAGE RANGE:

V

(OPR) = 2V to 6V

CC

■ PIN AND FUNCTION COMPATIBLE WITH

= 28 % VCC (MIN.)

NIL

PHL

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 on e of the A>B
out, A=B out and A<B out outputs. The comparing

TSSOPDIP SOP

ORDER CODES

PACKAGE TUBE T & R

DIP M74HC85B1R

SOP M74HC85M1R M74HC85RM13TR

TSSOP M74HC85TTR

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.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/10July 2001

M74HC85

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

2
3
4
5
6
7

9, 11, 14, 1

10, 12, 13,

15

8 GND Ground (0V)

16 Vcc Positive Supply Voltage

TRUTH TABLE

IN
IN

IN
OUT
OUT
OUT
B

0

A

0

A<B
A=B
A>B

A>B
A=B
A<B

to B
to A

A<B Expansion Input
A=B Expansion Input
A>B Expansion Input
A>B Expansion Output
A=B Expansion Output
A<B Expansion Output
Word B Inputs

3

Word A Inputs

3

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

LLLHHL
XXHLLH

A3 = B3 A2 = B2 A1 = B1 A0 = B0

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

X : Don’t Care

2/10

LOGIC DIAGRAM

M74HC85

This log i c diagram has not be used to est i m at e propagation delays

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

I

I

OK

I

I

or I

CC

P

T

T

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

Supply Voltage

CC

DC Input Voltage -0.5 to VCC + 0.5

I

DC Output Voltage -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current
DC Output Current

O

DC VCC or Ground Current

GND

Power Dissipation

D

Storage Temperature

stg

Lead Temperature (10 sec)

L

°C; derate to 300mW by 10mW/°C from 65°C to 85°C

-0.5 to +7 V
V
V

± 20 mA
± 20 mA
± 25 mA
± 50 mA

500(*) mW

-65 to +150 °C

300 °C

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V

V

T

t

r

Supply Voltage

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature

op

Input Rise and Fall Time VCC = 2.0V

, t

f

V
V

CC
CC

= 4.5V
= 6.0V

2 to 6 V

CC
CC

-55 to 125 °C
0 to 1000 ns

0 to 500 ns
0 to 400 ns

V
V

3/10

M74HC85

DC SPECIFICATIONS

Symbol Parameter

V

V

V

V

I

High Level Input

IH

Voltage

Low Level Input

IL

Voltage

High Level Output

OH

Voltage

Low Level Output

OL

Voltage

I

Input Leakage

I

Current
Quiescent Supply

CC

Current

Test Condition Value

V

(V)

CC

= 25°C

A

Min. Typ. Max. Min. Max. Min. Max.

-40 to 85°C -55 to 125°C

T

2.0 1.5 1.5 1.5

6.0 4.2 4.2 4.2

2.0 0.5 0.5 0.5

6.0 1.8 1.8 1.8

2.0

4.5

6.0

4.5

6.0

2.0

4.5

6.0

4.5

6.0

6.0

6.0

IO=-20 µA
I

=-20 µA

O

I

=-20 µA

O

I

=-4.0 mA

O

I

=-5.2 mA

O

IO=20 µA
I

=20 µA

O

I

=20 µA

O

I

=4.0 mA

O

I

=5.2 mA

O

= VCC or GND

V

I

= VCC or GND

V

I

1.9 2.0 1.9 1.9

4.4 4.5 4.4 4.4

5.9 6.0 5.9 5.9

4.18 4.31 4.13 4.10

5.68 5.8 5.63 5.60

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

0.17 0.26 0.33 0.40

0.18 0.26 0.33 0.40
± 0.1 ± 1 ± 1 µA

44080µA

Unit

V4.5 3.15 3.15 3.15

V4.5 1.35 1.35 1.35

V

V

AC ELECTRICAL CHARACTERISTICS (C

Test Condition Value

Symbol Parameter

t

TLH tTHL

t

PLH tPHL

t

PLH tPHL

Output Transition
Time

Propagation Delay
Time (A, B-OUT)

Propagation Delay
Time
(CASCADE-OUT)

V

CC

(V)

2.0 30 75 95 110

6.0 7131619

2.0 96 185 230 280

6.0 20 31 39 48

2.0 48 95 120 145

6.0 10 16 20 25

= 50 pF, Input tr = tf = 6ns)

L

T

= 25°C

A

Min. Typ. Max. Min. Max. Min. Max.

-40 to 85°C -55 to 125°C

Unit

ns4.5 8151922

ns4.5 24 37 46 56

ns4.5 12 19 24 29

4/10

M74HC85

CAPACITIVE CHARACTERISTICS

Test Condition Value

T

Symbol Parameter

V

CC

(V)

C

C

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (R ef er to Test Circui t). Averag e operating current can be obtained by the following equation. I

Input Capacitance

IN

Power Dissipation

PD

Capacitance (note 1)5.0 23 pF

5.0 5101010pF

= 25°C

A

Min. Typ. Max. Min. Max. Min. Max.

TEST CIRCUIT

-40 to 85°C -55 to 125°C

= CPD x VCC x fIN + ICC

CC(opr)

Unit

CL = 50pF or equivalent (includes jig and p robe capacit ance)
R

= Z

of pulse generator (typically 50Ω)

T

OUT

5/10

M74HC85

WAVEFORM : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)

6/10

M74HC85

Plastic DIP-16 (0.25) MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

a1 0.51 0.020

B 0.77 1.65 0.030 0.065
b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

I 5.1 0.201

L 3.3 0.130

Z 1.27 0.050

P001C

7/10

M74HC85

SO-16 MECHANICAL DATA

DIM.

A 1.75 0.068
a1 0.1 0.2 0.003 0.007
a2 1.65 0.064

b 0.35 0.46 0.013 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.019
c1 45° (typ.)

D 9.8 10 0.385 0.393

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.62 0.024

S8° (max.)

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

8/10

PO13H

M74HC85

TSSOP16 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0089

D 4.9 5 5.1 0.193 0.197 0.201

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0° 8°0° 8°

L 0.45 0.60 0.75 0.018 0.024 0.030

A2

A

A1

b

e

c

K

L

E

D

E1

PIN 1 IDENTIFICATION

1

0080338D

9/10

M74HC85

Information furnished is bel ieved to be accurate and reliable. However, STMicroe lectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No li cense is granted by imp lication or otherwise under a ny patent or patent rig hts of STMicroelectronics. Spec ific at ions
mentioned in this publication ar e subject to change without notice. This publication supersedes and replaces all information
previously supplied. S TMicroelectronics products are not authorized for use as critica l components in life suppo rt devices or
systems without express written approval of STMicroelectronics.

Australi a - Brazil - Chi na - Finland - F rance - Germany - Hong Kon g - I ndia - Italy - Japan - Malay sia - Malta - Morocco

© The ST logo is a registered trademark of STMicroelectronics

© 2001 STM icroelectronics - Printed in Ital y - All Rights Reserved

STMicr o el ectronics GROUP OF COMPANIES

Singapo re - Spain - Sweden - Switzerland - Uni ted Kingdom

© http://www.st.com

10/10