Datasheet M74HC7245, M74HC7645, M74HC7640 Datasheet (SGS Thomson Microelectronics)

M54H C 7245/ 764 0/ 7643/ 76 45

M74HC 7 245/ 7640/ 76 43/ 7645

OCTAL BUS TRAN SCEIVER(3-STATE):HC7645NONINVER TING

HC7640 INVERTING ,HC7643 INVERTING/NON INVERTING

.HIGH SPEED

tPD= 12 ns(TYP.) at VCC=5V

.LOWPOWER DISSIPATION

ICC=4µA (MAX.) at TA=25oC

.HIGH NOISE IMMUNITY

VH= 1.1 (TYP.) at VCC=5V

.OUTPUTDRIVE CAPABILITY

15 LSTTLLOADS

B1R

(PlasticPackage)

F1R

(CeramicPackage)

.SYMMETRICAL OUTPUT IMPEDANCE

|IOH|=IOL=6 mA (MIN)

.BALANCEDPROPAGATIONDELAYS

t

PLH=tPHL

.WIDE OPERATINGRANGE

VCC(OPR)= 2V to 6V

.PIN ANDFUNCTION COMPATIBLE

WITH 54/74LS245/640/643

DESCRIPTION

TheM54/74HC7245 HC7640,HC7643 andHC7645
utilise silicon gate C2MOS technology to achive
operating speeds equivalent to LSTTL devices.
Along withthe low power dissipationand high noise
immunity of standads C2MOS integrated circuit, it
possesses the capability to drive 15 LSTTL loads.
TheseIC’s are intended for two-way asynchronous
communication between data buses, and the
direction of data trasmission is determined by DIR
input.Theenableinput(G)canbeusedtodisablethe
device sothat the buses are effectivelyisolated.
The HC7245/640/7643/7645 have the same pin

configuration and function as the HC245/640/643
andtheyhave a hysteresischaracteristicswith each
input, so HC7245/7640/7643/7645 can be usedas a
line receiver, etc. All input are equipped with
protection circuits against static discharge and
transient excess voltage.
ITISPROHIBITEDTOAPPLYA SIGNALTOA BUS
TERMINAL WHEN IT IS IN OUTPUT MODE AND
WHEN A BUS THERMINAL IS FLOATING (HIGH
IMPEDANCE STATE), IT IS REQUESTED TO FIX
THE INPUT LEVEL BY MEANS OF EXTERNAL
PULLDOWNORPULL UPRESISTOR.

M1R

(MicroPackage)

ORDER CODES :

M54HC XXXXF 1 R M74H CX XXXM1 R
M74HC XXXXB1R M74HCXXXXC1 R

C1R

(Chip Carrier)

PIN CONNECTION (top view)

HC7 640 HC7 643 HC7645/HC7245

HC7245 iselectricallyand funcutionally the same as theHC7645

January 1994

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M54/M74HC7245/7640/7643/7645

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

1 DIR Directional Control

2, 3, 4, 5,

6, 7, 8, 9

18, 17, 16,
15, 14, 13,

12, 11

19 G Output Enabel Input

10 GND Ground (0V)
20 V

IEC LOGIC SYMBOLS

HC7640 HC764 3 HC7645

A1 to A8 Data Inputs/Outputs

B1 to B8 Data Inputs/Outputs

CC

(Active LOW)

Positive Supply Voltage

TRUTH TABLE

INPUT FUNCTION OUTPUT

G DIR A BUS B BUS HC7640 HC7643 HC7645/7245

L L OUTPUT INPUT A = B A = B A = B
L H INPUT OUTPUT B = A B = A B = A

HXZZZZZ

X: ”H” or ”L”
Z: Highimpedance

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M54/M74HC7245/7640/7643/7645

ABSOLU TE M AXI MUM R AT I NG S

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

AbsoluteMaximumRatingsarethosevaluesbeyond whichdamagetothedevicemayoccur.Functional operationunder theseconditionisnotimplied.
(*)500 mW:≅ 65oC derate to300 mWby 10mW/oC: 65oCto85oC

RECO MM ENDED OPE RAT IN G CO NDITIO NS

Symbol Parameter Value Unit

V

CC

V

I

V

O

T

op

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 ± 35 mA
DC VCCor Ground Current ± 70 mA

GND

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

L

Supply Voltage 2 to 6 V
Input Voltage 0 to V
Output Voltage 0 to V
Operating Temperature: M54HC Series

M74HC Series

CC
CC

-55 to +125

-40 to +85

o

C

o

C

V
V

o

C

o

C

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M54/M74HC7245/7640/7643/7645

DC SPECIFICATIONS

Test Conditions Value

Symbol Parameter

V

Positive

P

Threshold Voltage
(An, Bn inputs)

N

Negative

V

Threshold Voltage
(An, Bn inputs)

V

H

Hysteresiis
Voltage
(An, Bn inputs)

V

High Level Input

IH

Voltage
(DIR, G inputs)

V

Low Level Input

IL

Voltage
(DIR, G inputs)

OH

High Level

V

Output Voltage

V

Low Level Output

OL

Voltage

Input Leakage

I

I

Current

I

Quiescent Supply

OZ

Current

I

Quiescent Supply

CC

Current

V

CC

(V)

2.0 1 1.25 1.5 1 1.5 1 1.5

4.5 2.3 2.7 3.15 2.3 3.15 2.3 3.15

6.0 3 3.5 4.2 3 4.2 3 4.2

2.0 0.3 0.65 0.9 0.3 0.9 0.3 0.9

4.5 1.13 1.6 2 1.13 2 1.13 2

6.0 1.5 2.3 2.6 1.5 2.6 1.5 2.6

2.0 0.3 0.6 1 0.3 1 0.3 1

4.5 0.6 1.1 1.4 0.6 1.4 0.6 1.4

6.0 0.8 1.2 1.7 0.8 1.7 0.8 1.7

2.0 1.5 1.5 1.5

4.5 3.15 3.15 3.15

6.0 4.2 4.2 4.2

2.0 0.5 0.5 0.5

4.5 1.35 1.35 1.35

6.0 1.8 1.8 1.8

2.0
V

=

I

V

IH

or

V

IL

V

=

I

V

IH

or

V

IL

V

I=VCC

IO=-20 µA

=-6.0 mA 4.18 4.31 4.13 4.10

O

=-7.8 mA 5.68 5.8 5.63 5.60

O

IO=20µA

= 6.0 mA 0.17 0.26 0.33 0.40

O

= 7.8 mA 0.18 0.26 0.33 0.40

O

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

6.0 VI=VCCor GND æ0.5 ±5 ±1 µA

6.0 VI=VCCor GND 4 40 80 µA

T

=25oC

A

54HC and 74HC

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

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

V

V

V

V

V

1.9 2.0 1.9 1.9
V

0.0 0.1 0.1 0.1

V

or GND ±0.1 ±1 ±1 µA

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M54/M74HC7245/7640/7643/7645

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 25 60 75 90

4.5 7121518

A

54HC and 74HC

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

6.0 6101315

t

PLH

t

PHL

Propagation
Delay Time

2.0 61 125 156 190

4.5 15 25 31 38

6.0 13 21 27 32

t

t

PZL
PZH

Output Enable
Time

2.0

4.5 19 30 38 45

RL=1KΩ

77 150 188 225

6.0 16 26 32 38

t

t

PLZ
PHZ

Output Disable
Time

2.0

4.5 21 30 38 45

RL=1KΩ

84 150 188 225

6.0 18 26 32 38

C

C

Input Capacitance 5 10 10 10 pF

IN

Output

OUT

Capacitance

(*) Power Dissipation

C

PD

Capacitance

(*) CPDisdefined as the valueof the IC’sinternal equivalent capacitance which is calculatedfrom the operating current consumption withoutload.
(RefertoTest Circuit).Average operting current can be obtained bythefollowingequation. ICC(opr) = CPD•VCC•fIN+ICC/4(per Gate)

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

ns

ns

ns

ns

pF

pF

SWITCHING CHARACTERISTICS TEST WAVEFORM

V

CC

GND

V

CC

GND

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M54/M74HC7245/7640/7643/7645

Plastic DIP20 (0.25) MECHANICAL DATA

DIM.

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

a1 0.254 0.010

B 1.39 1.65 0.055 0.065
b 0.45 0.018

b1 0.25 0.010

D 25.4 1.000

E 8.5 0.335
e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

I 3.93 0.155
L 3.3 0.130
Z 1.34 0.053

mm inch

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P001J

M54/M74HC7245/7640/7643/7645

Ceramic DIP20 MECHANICAL DATA

DIM.

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

A 25 0.984
B 7.8 0.307

D 3.3 0.130

E 0.5 1.78 0.020 0.070

e3 22.86 0.900

F 2.29 2.79 0.090 0.110

G 0.4 0.55 0.016 0.022

I 1.27 1.52 0.050 0.060
L 0.22 0.31 0.009 0.012

M 0.51 1.27 0.020 0.050

N1 4° (min.), 15° (max.)

P 7.9 8.13 0.311 0.320

Q 5.71 0.225

mm inch

P057H

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M54/M74HC7245/7640/7643/7645

SO20 MECHANICAL DATA

DIM.

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

A 2.65 0.104

a1 0.10 0.20 0.004 0.007
a2 2.45 0.096

b 0.35 0.49 0.013 0.019

b1 0.23 0.32 0.009 0.012

C 0.50 0.020

c1 45° (typ.)

D 12.60 13.00 0.496 0.512

E 10.00 10.65 0.393 0.419
e 1.27 0.050

e3 11.43 0.450

F 7.40 7.60 0.291 0.299
L 0.50 1.27 0.19 0.050

M 0.75 0.029

S8°(max.)

mm inch

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P013L

M54/M74HC7245/7640/7643/7645

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

P027A

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M54/M74HC7245/7640/7643/7645

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consequences of use of such information nor for any infringement of patents or other rights of third partieswhich may results fromits use. No
license isgranted by implication or otherwise underany patent or patent rights ofSGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to changewithout notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproducts are not authorizedforuse ascritical componentsinlife supportdevices orsystems without express
written approval of SGS-THOMSON Microelectonics.

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