INTEGRATED CIRCUITS
DATA SHEET
74LVC2244A
Octal buffer/line driver with 30
Ω
series termination resistors; 5 V
input/output tolerant; 3-state
Product specification
File under Integrated Circuits, IC24
1999 Sep 30
Philips Semiconductors
Product specification
Octal buffer/line driver with 30
Ω
series termination
resistors; 5 V input/output tolerant; 3-state
FEATURES
•
5 V tolerant inputs/outputs for interfacing with 5 V logic
•
Wide supply voltage range of 1.2 to 3.6 V
•
CMOS low power consumption
•
Direct interface with TTL levels
•
Integrated 30
Ω
termination resistors.
DESCRIPTION
74LVC2244A
The 74LVC2244A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most
advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3 or 5 V devices. In
3-state operation, outputs can handle 5 V. These features
allow the use of these devices as translators in a mixed
3.3/5 V environment.
The 74LVC2244A 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. Schmitt-trigger action at all
inputs makes the circuit highly tolerant for slower input rise
and fall times. The 74LVC2244A is designed with 30
Ω
series termination resistors in both HIGH and LOW output
stages to reduce line noise.
QUICK REFERENCE DATA
Ground = 0 V; T
amb
= 25
°C;
t
r
= t
f
≤
2.5 ns.
SYMBOL
t
PHL
/t
PLH
C
I
C
PD
Note
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µW).
P
D
= C
PD
×
V
CC2
×
f
i
+
Σ(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts;
Σ(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
PARAMETER
propagation delay 1A
n
to 1Y
n
; 2A
n
to 2Y
n
input capacitance
power dissipation capacitance per buffer
V
I
= GND to V
CC
; note 1
CONDITIONS
C
L
= 50 pF; V
CC
= 3.3 V
TYPICAL
4.0
5.0
25
ns
pF
pF
UNIT
1999 Sep 30
2
Philips Semiconductors
Product specification
Octal buffer/line driver with 30
Ω
series termination
resistors; 5 V input/output tolerant; 3-state
FUNCTION TABLE
See note 1.
INPUT
nOE
L
L
H
Note
1. H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
ORDERING INFORMATION
PACKAGE
OUTSIDE NORTH
AMERICA
74LVC2244AD
74LVC2244ADB
74LVC2244APW
PINNING
PIN
1
2, 4, 6, 8
3, 5, 7, 9
10
11, 13, 15, 17
12, 14, 16, 18
19
20
1OE
1A
0
to 1A
3
2Y
0
to 2Y
3
GND
2A
3
to 2A
0
1Y
3
to 1Y
0
2OE
V
CC
SYMBOL
data inputs
bus outputs
ground (0 V)
data inputs
bus outputs
output enable input (active LOW)
DC supply voltage
DESCRIPTION
output enable input (active LOW)
NORTH AMERICA
74LVC2244AD
74LVC2244ADB
74LVC2244APW DH
TEMPERATURE
RANGE
−40
to +85
°C
PINS
20
20
20
PACKAGE
SO
SSOP
TSSOP
nA
n
L
H
X
74LVC2244A
OUTPUT
nY
n
L
H
Z
MATERIAL
plastic
plastic
plastic
CODE
SOT163-1
SOT339-1
SOT360-1
1999 Sep 30
3
Philips Semiconductors
Product specification
Octal buffer/line driver with 30
Ω
series termination
resistors; 5 V input/output tolerant; 3-state
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
PARAMETER
DC supply voltage
for max. speed performance
for low-voltage applications
V
I
V
O
DC input voltage
DC output voltage
output HIGH or LOW state
3-state
T
amb
t
r
,t
f
operating ambient temperature
input rise and fall times
see DC and AC characteristics per
device
V
CC
= 1.2 to 2.7 V
V
CC
= 2.7 to 3.6 V
0
0
−40
0
0
2.7
1.2
0
CONDITIONS
74LVC2244A
MIN.
MAX.
3.6
3.6
5.5
V
CC
5.5
+85
20
10
UNIT
V
V
V
V
V
°C
ns/V
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0 V).
SYMBOL
V
CC
I
IK
V
I
I
OK
V
O
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
DC output diode current
DC output voltage
output HIGH or LOW
output 3-state
I
O
I
CC
, I
GND
T
stg
P
tot
DC output diode current
DC V
CC
or GND current
storage temperature
power dissipation per package
plastic mini-pack (SO)
note 2
−
−
500
500
mW
mW
plastic shrink mini-pack (SSOP and note 3
TSSOP)
Notes
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. For SO package: above 70
°C
the value of P
tot
derates linearly with 8 mW/K.
3. For SSOP and TSSOP package: above 60
°C
the value of P
tot
derates linearly with 5.5 mW/K.
note 1
note 1
V
O
= 0 to V
CC
−0.5
−0.5
−
−
−65
V
CC
+ 0.5
+6.5
±50
±100
+150
V
V
mA
mA
°C
V
I
< 0
note 1
V
O
> V
CC
or V
O
< 0
CONDITIONS
MIN.
−0.5
−
−0.5
−
MAX.
+6.5
−50
+5.5
±50
UNIT
V
mA
V
mA
1999 Sep 30
5
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