INTEGRATED CIRCUITS
74LV244
Octal buffer/line driver (3-State)
Product specification
Supersedes data of 1997 Feb 19
IC24 Data Handbook
1998 May 20
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal buffer/line driver (3-State)
74LV244
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,
•
Typical V
OHV
(output V
OH
undershoot) > 2 V at V
CC
= 3.3 V,
•
Output capability: bus driver
•
I
CC
category: MSI
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25°C; t
r
= t
f
≤
2.5 ns
SYMBOL
t
PHL
/t
PLH
C
I
C
PD
PARAMETER
Propagation delay
1A
n
to 1Y
n
;
2A
n
to 2Y
n
Input capacitance
Power dissipation capacitance per buffer
T
amb
= 25°C
T
amb
= 25°C
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.
CONDITIONS
C
L
= 15 pF;
V
CC
= 3.3 V
TYPICAL
8.0
3.5
UNIT
ns
pF
pF
V
CC
= 3.3 V
V
I
= GND to V
CC1
35
NOTE:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µW)
V
CC2
f
i
)
(C
L
V
CC2
f
o
) where:
P
D
= C
PD
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;
V
CC2
f
o
) = sum of the outputs.
(C
L
ORDERING INFORMATION
PACKAGES
20-Pin Plastic DIL
20-Pin Plastic SO
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
TEMPERATURE RANGE
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
OUTSIDE NORTH AMERICA
74LV244 N
74LV244 D
74LV244 DB
74LV244 PW
NORTH AMERICA
74LV244 N
74LV244 D
74LV244 DB
74LV244PW DH
PKG. DWG. #
SOT146-1
SOT163-1
SOT339-1
SOT360-1
PIN CONFIGURATION
1OE
1A
0
2Y
0
1A
1
2Y
1
1A
2
2Y
2
1A
3
2Y
3
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
2OE
1Y
0
2A
0
1Y
1
2A
1
1Y
2
2A
2
1Y
3
2A
3
LOGIC SYMBOL
2 1A
0
17 2A
0
4 1A
1
15 2A
1
6 1A
2
13 2A
2
8 1A
3
11 2A
3
1 1OE
19 2OE
1Y
0
18
2Y
0
3
1Y
1
16
2Y
1
5
1Y
2
14
2Y
2
7
1Y
3
12
2Y
3
9
SV00621
SV00620
1998 May 20
2
853–1924 19420
Philips Semiconductors
Product specification
Octal buffer/line driver (3-State)
74LV244
PIN DESCRIPTION
PIN
NUMBER
1
2, 4, 6, 8
3, 5, 7, 9
10
17, 15, 13, 11
18, 16, 14, 12
19
20
SYMBOL
1OE
1A
0
to 1A
3
2Y
0
to 2Y
3
GND
2A
0
to 2A
3
1Y
0
to 1Y
3
2OE
V
CC
FUNCTION
Output enable input (active LOW)
Data inputs
Bus outputs
FUNCTIONAL DIAGRAM
2
4
6
8
1A
0
1A
1
1A
2
1A
3
1OE
2A
0
2A
1
2A
2
2A
3
2OE
2Y
0
2Y
1
2Y
2
2Y
3
3
5
7
9
1Y
0
1Y
1
1Y
2
1Y
3
18
16
14
12
Ground (0 V)
Data inputs
Bus outputs
Output enable input (active LOW)
Positive supply voltage
13
11
19
1
17
15
LOGIC SYMBOL (IEEE/IEC)
1
EN
18
16
14
12
2
4
6
8
SV00622
FUNCTION TABLE
INPUTS
nOE
nA
n
L
H
X
OUTPUT
nY
n
L
H
Z
19
EN
9
7
5
3
L
L
H
11
13
15
17
SV00666
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
1998 May 20
3
Philips Semiconductors
Product specification
Octal buffer/line driver (3-State)
74LV244
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
I
V
O
T
amb
PARAMETER
DC supply voltage
Input voltage
Output voltage
Operating ambient temperature range in free air
See DC and AC
characteristics
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
CONDITIONS
See Note 1
MIN
1.0
0
0
–40
–40
–
–
–
–
–
–
–
–
TYP
3.3
–
–
MAX
5.5
V
CC
V
CC
+85
+125
500
200
100
50
UNIT
V
V
V
°C
t
r
, t
f
Input rise and fall times
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
V
CC
"I
IK
"I
OK
"I
O
"I
GND
,
"I
CC
T
stg
PARAMETER
DC supply voltage
DC input diode current
DC output diode current
DC output source or sink current
– bus driver outputs
DC V
CC
or GND current for types with
– bus driver outputs
Storage temperature range
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
V
I
< –0.5 or V
I
> V
CC
+ 0.5V
V
O
< –0.5 or V
O
> V
CC
+ 0.5V
–0.5V < V
O
< V
CC
+ 0.5V
CONDITIONS
RATING
–0.5 to +7.0
20
50
35
UNIT
V
mA
mA
mA
70
–65 to +150
750
500
400
mA
°C
P
TOT
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.
1998 May 20
4
Philips Semiconductors
Product specification
Octal buffer/line driver (3-State)
74LV244
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V).
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
V
CC
= 1.2V
V
IH
HIGH level Input
voltage
V
CC
= 2.0V
V
CC
= 2.7 to 3.6V
V
CC
= 4.5 to 5.5V
V
CC
= 1.2V
V
IL
LOW level Input
voltage
V
CC
= 2.0V
V
CC
= 2.7 to 3.6V
V
CC
= 4.5 to 5.5
V
CC
= 1.2V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
CC
= 2.0V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
OH
HIGH l
level output
l t t
voltage
out uts
voltage; all outputs
V
CC
= 2.7V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
O
OH
HIGH level output
voltage; BUS driver
outputs
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
–I
O
= 8mA
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
–I
O
= 16mA
V
CC
= 1.2V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
CC
= 2.0V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
OL
LOW l
level output
l t t
voltage
out uts
voltage; all outputs
V
CC
= 2.7V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
O
OL
I
I
I
OZ
I
CC
∆I
CC
LOW level output
voltage; BUS driver
outputs
Input leakage
current
3-State output
OFF-state current
Quiescent supply
current; MSI
Additional
quiescent supply
current per input
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 8mA
V
CC
= 4.5V; V
I
= V
IH
or V
IL;
I
O
= 16mA
V
CC
= 5.5V; V
I
= V
CC
or GND
V
CC
= 3.6V; V
I
= V
IH
or V
IL;
V
O
= V
CC
or GND
V
CC
= 5.5V; V
I
= V
CC
or GND; I
O
= 0
V
CC
= 2.7V to 3.6V; V
I
= V
CC
– 0.6V
1.8
2.5
2.8
4.3
2.40
3.60
1.2
2.0
2.7
3.0
4.5
2.82
4.20
0
0
0
0
0
0.25
0.35
0.2
0.2
0.2
0.2
0.40
0.55
1.0
5
20.0
500
0.2
0.2
0.2
0.2
0.50
V
0.65
1.0
10
160
850
µA
µA
µA
µA
V
1.8
2.5
2.8
4.3
2.20
V
3.50
V
0.9
1.4
2.0
0.7<V
CC
0.3
0.6
0.8
0.3<V
CC
-40°C to +85°C
TYP
1
MAX
-40°C to +125°C
MIN
0.9
1.4
2.0
0.7<V
CC
0.3
0.6
0.8
0.3<V
CC
V
V
MAX
UNIT
NOTE:
1. All typical values are measured at T
amb
= 25°C.
1998 May 20
5
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