Philips
Semiconductors
74LV244
Octal buffer/line driver (3-State)
Product specification
Supersedes data of 1997 Feb 19
IC24 Data Handbook
1998 May 20
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
2
1998 May 20
8531924 19420
FEATURES
Wide operating voltage: 1.0 to 5.5 V
Optimized for low voltage applications: 1.0 to 3.6 V
Accepts TTL input levels between V
CC
= 2.7 V and V
CC
= 3.6 V
Typical V
OLP
(output ground bounce) < 0.8 V at V
CC
= 3.3 V,
T
amb
= 25
C
Typical V
OHV
(output V
OH
undershoot) > 2 V at V
CC
= 3.3 V,
T
amb
= 25
C
Output capability: bus driver
I
CC
category: MSI
DESCRIPTION
The 74LV244 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT244.
The 74LV244 is an octal non-inverting buffer/line driver with 3-State
outputs. The 3-State outputs are controlled by the output enable
inputs 1OE and 2OE. A HIGH on nOE causes the outputs to
assume a high impedance OFF-state. The 74LV244 is identical to
the 74LV240 but has non-inverting outputs.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
C; t
r
= t
f
2.5 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
/t
PLH
Propagation delay
1A
n
to 1Y
n
;
2A
n
to 2Y
n
C
L
= 15 pF;
V
CC
= 3.3 V
8.0
ns
C
I
Input capacitance
3.5
pF
C
PD
Power dissipation capacitance per buffer
V
CC
= 3.3 V
V
I
= GND to V
CC
1
35
pF
NOTE:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
W)
P
D
= C
PD
V
CC
2
f
i
)
(C
L
V
CC
2
f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacitance in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
V
CC
2
f
o
) = sum of the outputs.
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
OUTSIDE NORTH AMERICA
NORTH AMERICA
PKG. DWG. #
20-Pin Plastic DIL
40
C to +125
C
74LV244 N
74LV244 N
SOT146-1
20-Pin Plastic SO
40
C to +125
C
74LV244 D
74LV244 D
SOT163-1
20-Pin Plastic SSOP Type II
40
C to +125
C
74LV244 DB
74LV244 DB
SOT339-1
20-Pin Plastic TSSOP Type I
40
C to +125
C
74LV244 PW
74LV244PW DH
SOT360-1
PIN CONFIGURATION
SV00620
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A
0
2Y
0
1A
1
2Y
1
1A
2
2Y
2
1A
3
2Y
3
GND
2A
3
1Y
3
2A
2
1Y
2
2A
1
1Y
1
2A
0
1Y
0
2OE
V
CC
LOGIC SYMBOL
SV00621
1Y
0
2Y
0
18
3
1Y
1
2Y
1
16
5
1Y
2
2Y
2
14
7
1Y
3
2Y
3
12
9
1A
0
2A
0
2
17
1A
1
2A
1
4
15
1A
2
2A
2
6
13
1A
3
2A
3
8
11
1OE
1
2OE
19
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
3
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
FUNCTION
1
1OE
Output enable input (active LOW)
2, 4, 6, 8
1A
0
to 1A
3
Data inputs
3, 5, 7, 9
2Y
0
to 2Y
3
Bus outputs
10
GND
Ground (0 V)
17, 15, 13, 11
2A
0
to 2A
3
Data inputs
18, 16, 14, 12
1Y
0
to 1Y
3
Bus outputs
19
2OE
Output enable input (active LOW)
20
V
CC
Positive supply voltage
LOGIC SYMBOL (IEEE/IEC)
SV00666
18
16
14
12
2
4
6
8
EN
1
9
7
5
3
11
13
15
17
EN
19
FUNCTIONAL DIAGRAM
SV00622
2Y
0
3
2Y
1
5
2Y
2
7
2Y
3
9
2A
0
17
2A
1
15
2A
2
13
2A
3
11
2OE
19
1Y
0
18
1Y
1
16
1Y
2
14
1Y
3
12
1A
0
2
1A
1
4
1A
2
6
1A
3
8
1OE
1
FUNCTION TABLE
INPUTS
OUTPUT
nOE
nA
n
nY
n
L
L
L
L
H
H
H
X
Z
NOTES:
H =
HIGH voltage level
L
=
LOW voltage level
X =
don't care
Z =
high impedance OFF-state
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
4
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
V
CC
DC supply voltage
See Note 1
1.0
3.3
5.5
V
V
I
Input voltage
0
V
CC
V
V
O
Output voltage
0
V
CC
V
T
amb
Operating ambient temperature range in free air
See DC and AC
characteristics
40
40
+85
+125
C
t
r
, t
f
Input rise and fall times
V
CC
= 1.0V to 2.0V
V
CC
= 2.0V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 3.6V to 5.5V
500
200
100
50
ns/V
NOTE:
1. The LV is guaranteed to function down to V
CC
= 1.0V (input levels GND or V
CC
); DC characteristics are guaranteed from V
CC
= 1.2V to
V
CC
= 5.5V.
ABSOLUTE MAXIMUM RATINGS
1, 2
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0V).
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
V
CC
DC supply voltage
0.5 to +7.0
V
"
I
IK
DC input diode current
V
I
< 0.5 or V
I
> V
CC
+ 0.5V
20
mA
"
I
OK
DC output diode current
V
O
< 0.5 or V
O
> V
CC
+ 0.5V
50
mA
"
I
O
DC output source or sink current
bus driver outputs
0.5V < V
O
< V
CC
+ 0.5V
35
mA
"
I
GND
,
"
I
CC
DC V
CC
or GND current for types with
bus driver outputs
70
mA
T
stg
Storage temperature range
65 to +150
C
P
TOT
Power dissipation per package
plastic DIL
plastic mini-pack (SO)
plastic shrink mini-pack (SSOP and TSSOP)
for temperature range: 40 to +125
C
above +70
C derate linearly with 12 mW/K
above +70
C derate linearly with 8 mW/K
above +60
C derate linearly with 5.5 mW/K
750
500
400
mW
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
5
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V).
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
-40
C to +85
C
-40
C to +125
C
UNIT
MIN
TYP
1
MAX
MIN
MAX
V
CC
= 1.2V
0.9
0.9
V
HIGH level Input
V
CC
= 2.0V
1.4
1.4
V
V
IH
voltage
V
CC
= 2.7 to 3.6V
2.0
2.0
V
V
CC
= 4.5 to 5.5V
0.7
<
V
CC
0.7
<
V
CC
V
CC
= 1.2V
0.3
0.3
V
LOW level Input
V
CC
= 2.0V
0.6
0.6
V
V
IL
voltage
V
CC
= 2.7 to 3.6V
0.8
0.8
V
V
CC
= 4.5 to 5.5
0.3
<
V
CC
0.3
<
V
CC
V
CC
= 1.2V; V
I
= V
IH
or V
IL;
I
O
= 100
A
1.2
HIGH l
l
t
t
V
CC
= 2.0V; V
I
= V
IH
or V
IL;
I
O
= 100
A
1.8
2.0
1.8
V
OH
HIGH level output
voltage; all outputs
V
CC
= 2.7V; V
I
= V
IH
or V
IL;
I
O
= 100
A
2.5
2.7
2.5
V
voltage all out uts
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 100
A
2.8
3.0
2.8
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
I
O
= 100
A
4.3
4.5
4.3
V
O
HIGH level output
voltage; BUS driver
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 8mA
2.40
2.82
2.20
V
V
OH
voltage; BUS driver
outputs
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
I
O
= 16mA
3.60
4.20
3.50
V
V
CC
= 1.2V; V
I
= V
IH
or V
IL;
I
O
= 100
A
0
LOW l
l
t
t
V
CC
= 2.0V; V
I
= V
IH
or V
IL;
I
O
= 100
A
0
0.2
0.2
V
OL
LOW level output
voltage; all outputs
V
CC
= 2.7V; V
I
= V
IH
or V
IL;
I
O
= 100
A
0
0.2
0.2
V
voltage all out uts
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 100
A
0
0.2
0.2
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
I
O
= 100
A
0
0.2
0.2
V
O
LOW level output
voltage; BUS driver
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 8mA
0.25
0.40
0.50
V
V
OL
voltage; BUS driver
outputs
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
I
O
= 16mA
0.35
0.55
0.65
V
I
I
Input leakage
current
V
CC
= 5.5V; V
I
= V
CC
or GND
1.0
1.0
A
I
OZ
3-State output
OFF-state current
V
CC
= 3.6V; V
I
= V
IH
or V
IL;
V
O
= V
CC
or GND
5
10
A
I
CC
Quiescent supply
current; MSI
V
CC
= 5.5V; V
I
= V
CC
or GND; I
O
= 0
20.0
160
A
I
CC
Additional
quiescent supply
current per input
V
CC
= 2.7V to 3.6V; V
I
= V
CC
0.6V
500
850
A
NOTE:
1. All typical values are measured at T
amb
= 25
C.
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
6
AC CHARACTERISTICS
GND = 0V; t
r
= t
f
2.5ns; C
L
= 50pF; R
L
=1K
CONDITION
LIMITS
SYMBOL
PARAMETER
WAVEFORM
CONDITION
40 to +85
C
40 to +125
C
UNIT
V
CC
(V)
MIN
TYP
1
MAX
MIN
MAX
1.2
50
Propagation delay
2.0
17
24
31
t
PHL/
t
PLH
Pro agation delay
1A
n
to 1Y
n
;
2A to 2Y
Figures 1, 2
2.7
13
17
23
ns
2A
n
to 2Y
n
3.0 to 3.6
9
2
14
18
4.5 to 5.5
12
15
1.2
65
3-State output enable time
2.0
22
39
49
t
PZH/
t
PZL
3-State out ut enable time
1OE to 1Y
n
;
2OE to 2Y
Figures 2, 3
2.7
16
29
36
ns
2OE to 2Y
n
3.0 to 3.6
12
2
23
29
4.5 to 5.5
19
24
1.2
60
3-State output disable time
2.0
22
34
43
t
PHZ/
t
PLZ
3-State out ut disable time
1OE to 1Y
n
;
2OE to 2Y
Figures 2, 3
2.7
17
24
32
ns
2OE to 2Y
n
3.0 to 3.6
13
2
21
26
4.5 to 5.5
16
19
NOTES:
1. Unless otherwise stated, all typical values are measured at T
amb
= 25
C.
2. Typical values are measured at V
CC
= 3.3 V.
AC WAVEFORMS
V
M
= 1.5 V at V
CC
2.7 V and
3.6 V
V
M
= 0.5
V
CC
at V
CC
<
2.7 V and
4.5 V
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
V
X
= V
OL
+ 0.3 V at V
CC
2.7 V and
3.6 V
V
X
= V
OL
+ 0.1
V
CC
at V
CC
<
2.7 V and
4.5 V
V
Y
= V
OH
0.3 V at V
CC
2.7V and
3.6 V
V
Y
= V
OH
0.1
V
CC
at V
CC
<
2.7 V and
4.5 V
SV00617
V
M
1A
n
, 2A
n
INPUTS
1Y
n
, 2Y
n
OUTPUT
V
M
t
PLH
t
PHL
GND
V
OL
V
I
V
OH
Figure 1. Input (1A
n
, 2A
n
) to output (1Y
n
, 2Y
n
)
propagation delays.
SV00623
outputs
disabled
outputs
enabled
outputs
enabled
t
PHZ
t
PZH
t
PZL
t
PLZ
HIGH-to-OFF
OFF-to-HIGH
LOW-to-OFF
OFF-to-LOW
V
M
V
M
OE INPUT
V
X
V
OL
V
OH
V
Y
GND
GND
V
CC
V
I
V
M
Q
n
OUTPUT
Q
n
OUTPUT
Figure 2. 3-State enable and disable times.
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
7
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
RT
VI
D.U.T.
VO
CL
RL = 1k
VCC
Test Circuit for Outputs
DEFINITIONS
V
CC
V
I
< 2.7V
V
CC
TEST
t
PLH/
t
PHL
R
T
= Termination resistance should be equal to Z
OUT
of pulse generators.
2.7V
2.73.6V
w
4.5V
V
CC
50 pF
SV00896
S
1
t
PLZ/
t
PZL
t
PHZ/
t
PZH
Open
2 * V
CC
GND
RL = 1k
Open
2 * V
CC
GND
R
L
= Load resistor
C
L
= Load capacitance includes jig and probe capacitiance.
Figure 3. Load circuitry for switching times.
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
8
DIP20:
plastic dual in-line package; 20 leads (300 mil)
SOT146-1
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
9
SO20:
plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
10
SSOP20:
plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
11
TSSOP20:
plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
Philips Semiconductors
Product specification
74LV244
Octal buffer/line driver (3-State)
1998 May 20
12
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 940883409
Telephone 800-234-7381
DEFINITIONS
Data Sheet Identification
Product Status
Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code
Date of release: 05-96
Document order number:
9397-750-04437
Philips
Semiconductors
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