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IC Internal Diagram
7-2 74LV244 ; SIC7
Philips Semiconductors
Octal buffer/line driver (3-State)
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
•
Typical V
(output ground bounce) < 0.8 V at V
OLP
T
= 25°C
amb
•
Typical V
(output V
OHV
T
= 25°C
amb
•
Output capability: bus driver
•
I
category: MSI
CC
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; t
amb
SYMBOL
Propagation delay
1A
to 1Y
t
/t
n
PHL
PLH
2A
to 2Y
n
C
Input capacitance
I
C
Power dissipation capacitance per buffer
PD
NOTE:
1. C
is used to determine the dynamic power dissipation (P
PD
P
= C
V
D
PD
CC
f
= input frequency in MHz; C
i
f
= output frequency in MHz; V
o
2
(C
V
L
CC
ORDERING INFORMATION
PACKAGES
20-Pin Plastic DIL
20-Pin Plastic SO
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
PIN CONFIGURATION
1OE
GND
1998 May 20
Samsung Electronics
= 2.7 V and V
CC
CC
undershoot) > 2 V at V
= 3.3 V,
OH
CC
≤ 2.5 ns
= t
r
f
PARAMETER
;
n
n
2
) (C
2
f
V
f
) where:
i
L
CC
o
= output load capacitance in pF;
L
= supply voltage in V;
CC
f
) = sum of the outputs.
o
TEMPERATURE RANGE
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
1
20
V
CC
1A
2
19
2OE
0
3
2Y
18
1Y
0
0
1A
4
17
2A
1
0
2Y
5
16
1Y
1
1
6
15
1A
2A
2
1
2Y
7
14
1Y
2
2
1A
8
13
2A
3
2
9
2Y
12
1Y
3
3
10
11
2A
3
SV00620
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
= 3.6 V
outputs. The 3-State outputs are controlled by the output enable
CC
inputs 1OE and 2OE. A HIGH on nOE causes the outputs to
= 3.3 V,
assume a high impedance OFF-state. The 74LV244 is identical to
the 74LV240 but has non-inverting outputs.
CONDITIONS
C
= 15 pF;
L
V
= 3.3 V
CC
V
= 3.3 V
CC
1
V
= GND to V
I
CC
in µW)
D
OUTSIDE NORTH AMERICA
74LV244 N
74LV244 D
74LV244 DB
74LV244 PW
LOGIC SYMBOL
2
Product specification
74LV244
TYPICAL
8.0
3.5
35
NORTH AMERICA
PKG. DWG. #
74LV244 N
SOT146-1
74LV244 D
SOT163-1
74LV244 DB
SOT339-1
74LV244PW DH
SOT360-1
2
1A
1Y
18
0
0
17
2A
2Y
3
0
0
4
1A
1Y
16
1
1
15
2A
2Y
5
1
1
6
1A
1Y
14
2
2
13
2A
2Y
7
2
2
8
1A
1Y
12
3
3
11
2A
2Y
9
3
3
1
1OE
19
2OE
SV00621
853–1924 19420
UNIT
ns
pF
pF
7-3
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