Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74HC244
CMOS IC
OCTAL BUFFER AND LINE
DRIVER WITH 3-STATE OUTPUT

DIP-20
DESCRIPTION
The U74HC244 are octal buffer and line drivers with non-inverting
3-state outputs. When n OE is High, the outputs nQ will be in the high
impedance.

SOP-20
FEATURES
SSOP-20
* Operation voltage range: 2~6V
* 3-state output
* Output Drive Capability: 15 LSTTL Loads

ORDERING INFORMATION
Ordering Number
Lead Free
U74HC244L-D20-T
-

TSSOP-20
Halogen Free
U74HC244G-D20-T
U74HC244G-S20-R
U74HC244G-R20-R
U74HC244G-P20-R
Package
Packing
DIP-20
SOP-20
SSOP-20
TSSOP-20
Tube
Tape Reel
Tape Reel
Tape Reel
MARKING
DIP-20
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
SOP-20 / SSOP-20 / TSSOP-20
1 of 5
QW-R502-196.D
U74HC244
CMOS IC
PIN CONFIGURATION

1 OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND

2
3
4
5
6
7
8
9
10
20 V CC
19 2 OE
18 1Y1
17 2A4
16 1Y2
15
14
13
12
11
2A3
1Y3
2A2
1Y4
2A1
FUNCTION TABLE (each gate)
INPUT(nAn)
╳
H
L
INPUT(n OE )
H
L
L

1
OUTPUT(nYn)
Z
H
L
LOGIC DIAGRAM (positive logic)
1OE
2OE
1OE
1A1
1Y1
2A1
2Y1
1A2
1Y2
2A2
2Y2
1A3
1Y3
2A3
2Y3
1A4
1Y4
2A4
2Y4
Logic symbol
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
1A1
1A2
1A3
1A4
2OE
1
EN
2
4
6
8
19
18 1Y1
16 1Y2
14 1Y3
12 1Y4
EN
11
2A1
13
2A2 15
2A3 17
2A4
8
7
5
3
2Y1
1Y2
1Y3
1Y4
IEC logic symbol
2 of 5
QW-R502-196.D
U74HC244

CMOS IC
ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
Supply Voltage
VCC
-0.5~7
Input Clamp Current
IIK
±20
Output Clamp Current
IOK
±20
Output Current
IOUT
±35
VCC or GND Current
ICC
±70
Storage Temperature
TSTG
-65 ~ +150
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
SYMBOL
VCC
VIN
VOUT
Input Rise or Fall Times
tR, tF
Operating Temperature
TA

UNIT
V
mA
mA
mA
mA
°C
CONDITIONS
MIN
2
0
0
TYP
MAX
6
VCC
VCC
1000
500
400
85
UNIT
V
V
V
ns
ns
ns
°C
TYP
MAX
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
nA
μA
μA
pF
VCC=2V
VCC=4.5V
VCC=6V
-40
STATIC CHARACTERISTICS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
Input Leakage Current
Output OFF-State Current
Quiescent Supply Current
Input Capacitance
II(LEAK)
IOZ
IQ
CIN
TEST CONDITIONS
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V, IOH=-20μA
VCC=4.5V, IOH=-20μA
VCC=6V, IOH=-20μA
VCC=4.5V, IOH=-6mA
VCC=6V, IOH=-7.8mA
VCC=2V, IOL=20μA
VCC=4.5V, IOL=20μA
VCC=6V, IOL=20μA
VCC=4.5V, IOL=6mA
VCC=6V, IOL=7.8mA
VCC=6V, VIN=VCC or 0
VCC=6V,VOUT=VCC or 0,VIN=VIH or VIL
VCC=6V, VIN=VCC or 0, IOUT=0
VCC=2V~6V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
1.5
3.15
4.2
0.5
1.35
1.8
1.9
4.4
5.9
3.98
5.48
1.998
4.499
5.999
4.3
5.8
0.002
0.001
0.001
0.17
0.15
3
0.1
0.1
0.1
0.26
0.26
±100
±0.5
8
10
3 of 5
QW-R502-196.D
U74HC244

DYNAMIC CHARACTERISTICS (TA=25°C, Input: tR, tF=6ns)
PARAMETER
Propagation delay from input
(A) to output(Y)
3-state output enable time
n OE to nYn
3-state output disable time
n OE to nYn

CMOS IC
SYMBOL
tPLH /tPHL
tPZH /tPZL
tPHZ /tPLZ
TEST CONDITIONS
VCC=2V, CL=50pF
VCC=2V, CL=150pF
VCC=4.5V, CL=50pF
VCC=4.5V, CL=150pF
VCC=6V, CL=50pF
VCC=6V, CL=150pF
VCC=2V, CL=50pF
VCC=2V, CL=150pF
VCC=4.5V, CL=50pF
VCC=4.5V, CL=150pF
VCC=6V, CL=50pF
VCC=6V, CL=150pF
VCC=2V, CL=50pF
VCC=4.5V, CL=50pF
VCC=6V, CL=50pF
MIN
TYP
40
56
13
18
11
15
75
100
15
20
13
17
75
15
13
MAX
115
165
23
33
20
28
150
200
30
40
26
34
150
30
26
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MIN
TYP
35
MAX
UNIT
pF
OPERATING CHARACTERISTICS
PARAMETER
Power Dissipation Capacitance
SYMBOL
Cpd
TEST CONDITIONS
No load
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 5
QW-R502-196.D
U74HC244

CMOS IC
TEST CIRCUIT AND WAVEFORMS
Note: CL includes probe and jig capacitance.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 5
QW-R502-196.D
Similar pages