®
74ACT8244
RELAY DRIVER IC
s
s
s
s
s
OPERATES 4 LATCHING RELAIS, 1 SINGLE
SIDE STABLE RELAY AND 1 LED
VERY LOW POWER CONSUMPTION
TTL COMPATIBLE INPUT THRESHOLDS
IMPROVED LATCH-UP IMMUNITY UP TO
300mA
TSSOP-20 PACKAGE
T
(TSSOP Package)
ORDER CODES :
74ACT8244TTR
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 the true table.
PIN DESCRIPTION
PIN No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SYMBOL
RST
IN1A
IN1B
IN2A
IN2B
IN3A
IN3B
IN4
IN5
GND
NC
OUT5
OUT4
OU3B
OU3A
OU2B
OU2A
OU1B
OU1A
V
CC
NAME AND F UNCTION
Master Reset
Input of 1st latched relay drv
Input of 1st latched relay drv
Input of 2nd latched relay drv
Input of 2nd latched relay drv
Input of 3rd latched relay drv
Input of 3rd latched relay drv
Input of 1st relay driver
Input LED driver
Ground
Not Connected
Output of LED driver
Output of 1st relay driver
Output 3rd latched relay drv
Output 3rd latched relay drv
Output 2nd latched relay drv
Output 2nd latched relay drv
Output 1st latched relay drv
Output 1st latched relay drv
Supply Voltage
LOGIC DIAGRAM
November 1999
1/6
74ACT8244
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
orI
GND
T
stg
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
DC V
CC
or Ground Current
Storage Temperature
Parameter
Value
-0.5 to +7
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±
50
±
50
±
100
±
400
-65 to +150
Unit
V
V
V
mA
mA
mA
mA
o
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
T
op
dt/dv
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature:
Input Rise and Fall Time V
CC
= 4.5 to 5.5V (note1)
Parameter
Value
4.75 to 5.25
0 to V
CC
0 to V
CC
-30 to +80
10
Unit
V
V
V
o
C
ns/V
1) V
IN
from 0.8 V to 2.0 V
DC SPECIFICATIONS
(Electrical characteristics over recommended operating conditions)
Symb ol
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
V
OH
V
OL
I
I
I
CCT
I
CC
Parameter
High Level Input Threshold
Low Level Input Threshold
High Level Output Voltage for
Single Driver
Low Level Output Voltage for
Single Driver
High Level Output Voltage for
Double Relay Driver
Low Level Output Voltage for
Double Relay Driver
High Level Output Voltage for
Single Side Relay or LED
Low Level Output Voltage for
Single Side Relay or LED
Input Leakage Current
Max I
CC
/Input
Quiescent Supply Current
Test Co nditi ons
Min.
V
O
= 0.1 V or V
CC
- 0.1 V
V
O
= 0.1 V or V
CC
- 0.1 V
I
OUT
= -35mA
I
OUT
= 35mA
I
OUT
= -70mA
I
OUT
= 70mA
I
OUT
= -50mA
I
OUT
= 50mA
V
I
= V
CC
or GND
V
I
= V
CC
-2.1 V
V
I
= V
CC
or GND
0.6
4
2.0
Value
T yp.
1.4
1.4
V
CC
-0.68 V
CC
-0.3
0.25
V
CC
-0.68 V
CC
-0.3
0.25
V
CC
-0.8 V
CC
-0.4
0.3
0.8
±1
1.5
40
0.68
0.68
0.8
Max.
V
V
V
V
V
V
V
V
µA
mA
µA
Un it
2/6
74ACT8244
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, R
L
= 500
Ω,
Input t
r
= t
f
=3 ns)
Symb ol
t
PLH
t
PHL
Parameter
Propagation Delay Time
T est Cond it ion
Min.
Over recommended operating
conditions
Valu e
T yp.
7.0
Un it
Max.
11.0
ns
TRUTH TABLE FOR LATCHING RELAY
DRIVER
INPUT
RST
H
L
L
L
L
INn A
X
L
L
H
H
INn B
X
L
H
L
H
OUT PUT
OUnA OUnB
L
L
L
H
H
L
L
H
L
H
Storage
Storage
Operate
Release
Storage
Co nditi on
TRUTH TABLE FOR SINGLE SIDE RELAY
INPUT
IN4
L
H
OUTPUT
OUT 4
H
L
TRUTH TABLE FOR LED DRIVER
INPUT
IN5
L
H
OUTPUT
OUT 5
H
L
Z = High Impedance
X = Don’t Care
n = 1,2,3
OUTPUT CIRCUIT FOR LATCHING RELAY DRIVER
OUTPUT CIRCUIT FOR SINGLE SIDE RELAY
OUTPUT CIRCUIT FOR LED DRIVER
3/6
74ACT8244
Output Characteristics of a Double Relay Driver
N-channel with All Outputs Loaded
Output Characteristics of a Double Relay Driver
P-channel with All Outputs Loaded
Output Characteristics of a Single Side Relay or
Led Driver N-channel with All Outputs Loaded
Output Characteristics of a Single Side Relay or
Led Driver P-channel with All Outputs Loaded
4/6
74ACT8244
TSSOP20 MECHANICAL DATA
mm
MIN.
A
A1
A2
b
c
D
E
E1
e
K
L
0
o
0.50
0.05
0.85
0.19
0.09
6.4
6.25
4.3
6.5
6.4
4.4
0.65 BSC
4
o
0.60
8
o
0.70
0
o
0.020
0.10
0.9
TYP.
MAX.
1.1
0.15
0.95
0.30
0.2
6.6
6.5
4.48
0.002
0.335
0.0075
0.0035
0.252
0.246
0.169
0.256
0.252
0.173
0.0256 BSC
4
o
0.024
8
o
0.028
0.004
0.354
MIN.
inch
TYP.
MAX.
0.433
0.006
0.374
0.0118
0.0079
0.260
0.256
0.176
DIM.
A
A2
A1
b
e
K
c
L
E
D
E1
PIN 1 IDENTIFICATION
1
5/6
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