Datasheet M74HC85 Datasheet (SGS Thomson Microelectronics)

4-BIT MAGNITUDE COMPARATOR

.HIGH SPEED

tPD= 22 ns (TYP.) atVCC=5V

.LOWPOWER DISSIPATION

ICC=4µA(MAX.) at TA=25°C

.HIGH NOISEIMMUNITY

V

NIH=VNIL

=28%VCC(MIN.)

.OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.SYMMETRICAL OUTPUT IMPEDANCE

|IOH|=IOL=4 mA(MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGERANGE

VCC(OPR)= 2V to 6 V

.PIN AND FUNCTION COMPATIBLE WITH

54/74LS85

M54HC85
M74HC85

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC 85F1R M74H C85M1R
M74HC 85B1R M 74HC85C1R

(CeramicPackage)

(Chip Carrier)

F1R

C1R

DESCRIPTION

The M54/74HC85 is a high speed CMOS 4-BIT
MAGNITUDECOMPARATOR fabricated in silicon
gate C2MOS technology. It has the same high
speed performance of LSTTL combined with true
CMOS low power consumption. This comparator
compares two 4-bit words and provides a high volt­agelevelon oneoftheA >Bout,A =BoutandA<B
out outputs. Thecomparing bit number is easily ex­panded by cascading several devices as shown in
the typical application. All inputs are equipped with
protection circuitsagainst staticdischarge and tran­sient excess voltage.

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN CONNECTIONS(top view)

NC =
No Internal
Connection

December1992

1/11

M54/M74HC85

PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

2IN
3IN
4IN
5 OUT
6 OUT
7 OUT

9, 11, 14, 1 B

10, 12, 13, 15 A

0
0

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

A=B Expansion Output

A=B

A<B Expansion Output

A<B

Word B Inputs

3

Word A Inputs

3

8 GND Ground (0V)

16 V

CC

Positive Supply Voltage

LOCIG DIAG RAM

IEC LOGIC SYMBOL

2/11

TRUTH TABLE

M54/M74HC85

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’TCARE

ABSOLU TE M AXIMU M R AT INGS

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

L

AbsoluteMaximumRatingsarethose values beyondwhichdamagetothedevice mayoccur.Functionaloperationundertheseconditionisnotimplied.
(*)500 mW:≅ 65oC derate to300 mW by 10mW/oC: 65oCto85oC

Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V

I

DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 25 mA
DC VCCor Ground Current ± 50 mA

GND

Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10 sec) 300

o

C

o

C

3/11

M54/M74HC85

RECO MM ENDED OPERAT I N G CO NDI TI O NS

Symbol Parameter Value Unit

V

V

V

T

t

r,tf

DC SPECIFICATIONS

Symbol Parameter

V

IH

V

V

OH

V

OL

I

I

CC

Supply Voltage 2 to 6 V

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature: M54HC Series

op

M74HC Series

CC
CC

-55 to +125

-40 to +85

Input Rise and Fall Time VCC= 2 V 0 to 1000 ns

V

= 4.5 V 0 to 500

CC

V

= 6 V 0 to 400

CC

Test Conditions Value

V

(V)

CC

=25oC

T

A

54HC and 74HC

-40 to 85oC
74HC

-55 to 125oC

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

High Level Input
Voltage

2.0 1.5 1.5 1.5

4.5 3.15 3.15 3.15

6.0 4.2 4.2 4.2

Low Level Input

IL

Voltage

2.0 0.5 0.5 0.5

4.5 1.35 1.35 1.35

6.0 1.8 1.8 1.8

High Level
Output Voltage

Low Level Output
Voltage

Input Leakage

I

Current
Quiescent Supply

2.0
V

=

I

4.5 4.4 4.5 4.4 4.4

6.0 5.9 6.0 5.9 5.9

4.5 I

6.0 I

2.0

4.5 0.0 0.1 0.1 0.1

6.0 0.0 0.1 0.1 0.1

4.5 I

6.0 I

6.0

IO=-20 µA

V

IH

or

V

IL

=-4.0 mA 4.18 4.31 4.13 4.10

O

=-5.2 mA 5.68 5.8 5.63 5.60

O

V

=

I

IO=20µA

V

IH

or

V

IL

= 4.0 mA 0.17 0.26 0.33 0.40

O

= 5.2 mA 0.18 0.26 0.33 0.40

O

VI=VCCor GND ±0.1 ±1 ±1 µA

1.9 2.0 1.9 1.9

0.0 0.1 0.1 0.1

6.0 VI=VCCor GND 4 40 80 µA

Current

54HC

V
V

o

C

o

C

Unit

V

V

V

V

4/11

M54/M74HC85

AC ELECTRICAL CHARACTERISTICS (CL=50pF,Inputtr=tf=6ns)

Test Conditions Value

T

=25oC

Symbol Parameter

t
t

TLH
THL

Output Transition
Time

V

CC

(V)

2.0 30 75 95 110

4.5 8151922

A

54HC and 74HC

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

6.0 7131619

t

PLH

t

PHL

Propagation
Delay Time
(A, B-OUT)

t
t

PLH
PHL

Propagation
Delay Time
(CASCADE-OUT)

C

C

PD

Input Capacitance 5 10 10 10 pF

IN

(*) Power Dissipation

2.0 96 185 230 280

4.5 24 37 46 56

6.0 20 31 39 48

2.0 48 95 120 145

4.5 12 19 24 29

6.0 10 16 20 25

23

Capacitance

(*) CPDisdefinedas the value ofthe IC’s internal equivalent capacitance which is calculated fromthe operatingcurrent consumption withoutload.
(RefertoTest Circuit).Average opertingcurrentcan be obtained bythe followingequation. ICC(opr) = CPD•VCC•fIN+I

-40 to 85oC
74HC

-55 to 125oC
54HC

CC

Unit

ns

ns

ns

pF

SWITCHING CHARACTERISTICS TEST
WAVEFORM

TEST CIRCUIT ICC(Opr.)

INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHINGCHARACTERISTICSTEST.

5/11

M54/M74HC85

TYPICAL APPLICATION

LSB= lowestsignificantbit MSB= MOSTSIGNIFICANTBIT

X: DON’TCARE

COMPARING INPUTS

(A)>(B) X X X H L L

(A)=(B)

(A)<(B) X X X L L H

CASCADING INPUTS OUTPUTS

A>B A=B A<B A>B A=B A<B

HLLHLL

XHXLHL

LLHLLH

6/11

Plastic DIP16 (0.25) MECHANICAL DATA

M54/M74HC85

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

mm inch

P001C

7/11

M54/M74HC85

Ceramic DIP16/1 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 20 0.787
B 7 0.276
D 3.3 0.130
E 0.38 0.015

e3 17.78 0.700

F 2.29 2.79 0.090 0.110
G 0.4 0.55 0.016 0.022
H 1.17 1.52 0.046 0.060

L 0.22 0.31 0.009 0.012
M 0.51 1.27 0.020 0.050
N 10.3 0.406

P 7.8 8.05 0.307 0.317

Q 5.08 0.200

mm inch

8/11

P053D

SO16 (Narrow) MECHANICAL DATA

M54/M74HC85

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.75 0.068
a1 0.1 0.2 0.004 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.)

mm inch

P013H

9/11

M54/M74HC85

PLCC20 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 9.78 10.03 0.385 0.395

B 8.89 9.04 0.350 0.356

D 4.2 4.57 0.165 0.180
d1 2.54 0.100
d2 0.56 0.022

E 7.37 8.38 0.290 0.330

e 1.27 0.050

e3 5.08 0.200

F 0.38 0.015
G 0.101 0.004
M 1.27 0.050

M1 1.14 0.045

mm inch

10/11

P027A

M54/M74HC85

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is grantedby implication or otherwise underany patent or patentrights ofSGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin life supportdevices or systemswithout express
written approval of SGS-THOMSON Microelectonics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -

Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - UnitedKingdom - U.S.A

SGS-THOMSON Microelectronics GROUP OF COMPANIES

11/11