Datasheet 74ACT8244 Datasheet (SGS Thomson Microelectronics)



■ OPERATES4 LATCHINGRELAIS, 1SINGLE

SIDESTABLERELAYAND1 LED

■ VERYLOWPOWERCONSUMPTION

■

TTL COMPATIBLEINPUT THRESHOLDS

■ IMPROVEDLATCH-UP IMMUNITY UPTO

300mA

■

TSSOP-20PACK AGE

DESCRIPTION

The device is a relais driver for line card
application. It is able to operate four latching
relais, one single side stable relay and one LED
connected either to GND or VCC. All the outputs
can be set to LOW with the RST input as shown
in thetrue table.

74ACT8244

RELAY DRIVER IC

T

(TSSOPPackage)

ORDERCODES :

74ACT8244TTR

PIN DESCRIPTION

PI N No SYMB O L NAM E AND F UNCT ION

1 RST Master Reset
2 IN1A Input of 1st latched relay drv
3 IN1B Input of 1st latched relay drv
4 IN2A Input of 2nd latched relay drv
5 IN2B Input of 2nd latched relay drv
6 IN3A Input of 3rd latched relay drv
7 IN3B Input of 3rd latched relay drv
8 IN4 Input of 1st relay driver

9 IN5 Input LED driver
10 GND Ground
11 NC Not Connected
12 OUT5 Output of LED driver

13 OUT4 Output of 1st relay driver

14 OU3B Output 3rd latched relay drv
15 OU3A Output 3rd latched relay drv
16 OU2B Output 2nd latched relay drv
17 OU2A Output 2nd latched relay drv
18 OU1B Output 1st latched relay drv
19 OU1A Output 1st latched relay drv
20 V

CC

Supply Voltage

LOGICDIAGRAM

November 1999

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74ACT8244

ABSOLUTE MAXIMUMRATINGS

Symb o l Para met er Val u e Uni t

V

V

V

I

I

OK

I

orI

I

CC

T

AbsoluteMaximumRatingsarethosevaluesbeyond whichdamagetothedevicemayoccur. Functionaloperationunderthesecondition isnotimplied.

RECOMMENDEDOPERATINGCONDITIONS

Symb o l Parameter Val u e Uni t

V

V

V

T

dt/dv Input Rise and Fall Time V

1)VINfrom0.8V to2.0V

Supply Voltage -0.5to+7 V

CC

DC Input Voltage -0.5toVCC+0.5 V

I

DC Output Voltage -0.5toVCC+0.5 V

O

DC Input Diode Current ±50 mA

IK

DC Output Diode Current ±50 mA
DC Output Current

O

DC VCCor Ground Current

GND

Storage Temperature -65to+150

stg

Supply Voltage 4.75to5.25 V

CC

Input Voltage 0toV

I

Output Voltage 0toV

O

Operating Temperature: -30to+80

op

= 4.5 to 5.5V (note1) 10 ns/V

CC

100 mA

±

400 mA

±

CC
CC

o

C

V
V

o

C

DC SPECIFICATIONS (Electricalcharacteristics over recommendedoperating conditions)

Symb o l Parame t er Test Cond ition s Value Unit

Min. T yp. Max.

High Level Input Threshold VO=0.1V or VCC- 0.1 V 2.0 1.4 V

V

IH

Low Level Input Threshold VO=0.1V or VCC- 0.1 V 1.4 0.8

V

IL

High Level Output Voltage for

V

OH

Single Driver
Low Level Output Voltage for

V

OL

Single Driver
High Level Output Voltage for

V

OH

Double Relay Driver
Low Level Output Voltage for

V

OL

Double Relay Driver
High Level Output Voltage for

V

OH

Single Side Relay or LED
Low Level Output Voltage for

V

OL

Single Side Relay or LED
Input Leakage Current VI=VCCor GND ±1 µA

I

I

Max ICC/Input VI=VCC-2.1V 0.6 1.5 mA

I

CCT

Quiescent Supply Current VI=VCCor GND 4 40 µA

I

CC

I

=-35mA VCC-0.68 VCC-0.3 V

OUT

I

= 35mA 0.25 0.68 V

OUT

I

=-70mA VCC-0.68 VCC-0.3 V

OUT

I

= 70mA 0.25 0.68 V

OUT

I

=-50mA VCC-0.8 VCC-0.4 V

OUT

I

=50mA 0.3 0.8 V

OUT

V

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74ACT8244

AC ELECTRICAL CHARACTERISTICS

Symbol Parameter Test Condition Value Unit

t

Propagation Delay Time Overrecommendedoperating

PLH

t

PHL

TRUTH TABLE FOR LATCHINGRELAY
DRIVER

INPUT OUTPUT Condition

RST INn A INn B O U n A OUnB

HXXLLStorage

LLLLLStorage
LLHLHOperate
L H L H L Release
LHHHHStorage

Z = High Impedance
X=Don’tCare
n=1,2,3

= 50 pF, RL= 500 Ω, Inputtr=tf=3 ns)

(C

L

Min. T yp. Max.

conditions

TRUTH TABLE FORSINGLE SIDE RELAY

INPUT OUTPU T

IN4 OUT4

LH

HL

TRUTH TABLE FORLED DRIVER

INPUT OUTPU T

IN5 OUT5

LH

HL

7.0 11.0 ns

OUTPUT CIRCUIT FOR LATCHING RELAYDRIVER

OUTPUT CIRCUIT FOR SINGLESIDE RELAY OUTPUT CIRCUIT FOR LED DRIVER

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74ACT8244

OutputCharacteristics of a DoubleRelay Driver
N-channelwith All OutputsLoaded

OutputCharacteristics of a SingleSide Relay or
Led Driver N-channelwith All OutputsLoaded

OutputCharacteristics of a DoubleRelay Driver
P-channelwith All OutputsLoaded

OutputCharacteristics of a Single Side Relayor
Led Driver P-channelwith All OutputsLoaded

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TSSOP20 MECHANICAL DATA

74ACT8244

DIM.

mm inch

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

A 1.1 0.433

A1 0.05 0.10 0.15 0.002 0.004 0.006

A2 0.85 0.9 0.95 0.335 0.354 0.374

b 0.19 0.30 0.0075 0.0118

c 0.09 0.2 0.0035 0.0079

D 6.4 6.5 6.6 0.252 0.256 0.260

E 6.25 6.4 6.5 0.246 0.252 0.256

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0

o

o

4

o

8

o

0

o

4

L 0.50 0.60 0.70 0.020 0.024 0.028

o

8

A2

A

A1

PIN 1 IDENTIFICATION

b

e

K

c

L

E

D

E1

1

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74ACT8244

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subject to change without notice. This publicationsupersedes andreplacesallinformation previously supplied. STMicroelectronics products
are not authorized for use ascritical components in life support devices or systems withoutexpress written approval of STMicroelectronics.

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