1
PS8159D 11/23/98
Product Description
Pericom Semiconductors PI74ALVTC series of logic circuits
are produced in the Companys advanced 0.35 micron CMOS
technology, achieving industry leading speed.
The PI74ALVTC16244 buffer/driver is designed specifically to
improve both the performance and density of 3-state memory
address drivers, clock drivers, and bus-oriented receivers and
transmitters.
The device can be used as four 4-bit buffers, two 8-bit buffers, or one
16-bit buffer. It provides true outputs and symmetrical active-low
output-enable (OE) inputs.
To ensure the high-impedance state during power up or power
down, OE should be tied to Vdd through a pullup resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
The family offers both I/O Tolerant, which allows it to operate in
mixed 1.8/3.6V systems, and "Bus Hold," which retains the data
input's last state whenever the data input goes to high-impedance,
preventing "floating" inputs and eliminating the need for pullup/
down resistors.
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Product Features
PI74ALVTC family is designed for low voltage operation,
V
DD
= 1.8V to 3.6V
Supports Live Insertion
3.6V I/O Tolerant Inputs and Outputs
Bus Hold
High Drive, -32/64mA @ 3.3V
Uses patented noise reduction circuitry
Power-off high impedance inputs and outputs
Industrial operation at 40C to +85C
Packages available:
48-pin 240 mil wide plastic TSSOP (A)
48-pin 173 mil wide plastic TVSOP (K)
48-pin 300 mil wide plastic SSOP (V)
PI74ALVTC16244
1.8/2.5/3.3V 16-Bit Buffer/Driver
with 3-State Outputs
Logic Block Diagram
2
Y
1
2
Y
2
2
Y
3
2
Y
4
4
Y
1
4
Y
2
4
Y
3
4
Y
4
3
Y
1
3
Y
2
3
Y
3
3
Y
4
1
Y
4
1
Y
3
1
Y
2
1
Y
1
1
OE
1
A
1
1
A
2
1
A
3
1
A
4
3
OE
3
A
1
3
A
2
3
A
3
3
A
4
2
OE
2
A
1
2
A
2
2
A
3
2
A
4
4
OE
4
A
1
4
A
2
4
A
3
4
A
4
43
44
46
47
1
37
38
40
41
48
12
11
9
8
6
5
3
2
32
33
35
36
25
17
16
14
13
26
27
29
30
24
23
22
20
19
2
PS8159D 11/23/98
PI74ALVTC16244
16-Bit Buffer Driver With 3-State Outputs
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s
t
u
p
n
I
s
t
u
p
t
u
O
E
O
n
A
n
X
x
Y
n
L
H
H
L
L
L
H
X
Z
Pin Name
Description
nOE
3-State Output Enable Inputs (Active LOW)
nAx
Inputs
nYx
3-State Outputs
GND
Ground
V
CC
Power
Product Pin Description
Truth Table
(1)
Note:
1.
H = High Signal Level
L = Low Signal Level
X = Don't Care or Irrelevant
Z = High Impedance
Product Pin Configuration
1
OE
1
Y
1
1
Y
2
GND
1
Y
3
1
Y
4
V
CC
2
Y
1
2
Y
2
GND
2
Y
3
2
Y
4
3
Y
1
3
Y
2
GND
3
Y
3
3
Y
4
V
CC
4
Y
1
4
Y
2
GND
4
Y
3
4
Y
4
4
OE
1
2
3
4
5
6
7
8
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
32
31
30
29
28
27
26
25
2
OE
1
A
1
1
A
2
GND
1
A
3
1
A
4
V
CC
2
A
1
2
A
2
GND
2
A
3
2
A
4
3
A
1
3
A
2
GND
3
A
3
3
A
4
V
CC
4
A
1
4
A
2
GND
4
A
3
4
A
4
3
OE
48-PIN
A48
K48
V48
3
PS8159D 11/23/98
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PI74ALVTC16244
16-Bit Buffer Driver With 3-State Outputs
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect reliability.
Supply Voltage Range, V
DD
................................................. 0.5V to 4.6V
Input Voltage Range, V
I
....................................................... -0.5V to 4.6V
Output Voltage Range, V
O
(3-Stated) .................................. -0.5V to 4.6V
Output Voltage Range, V
O
(1)
(Active) ........................ 0.5V to V
DD
+0.5V
DC Input Diode Current (I
IK
) V
I
<0V .............................................. -50mA
DC Output Diode Current (I
OK
)
V
O
<0V ......................................................................................... -50mA
V
O
>V
DD
....................................................................................... +50mA
DC Output Source/Sink Current (I
OH
/I
OL
) ............................... -64/128mA
DC V
DD
or GND Current per Supply Pin (I
CC
or GND) .............. 100mA
Storage Temperature Range, T
stg
................................
65
C to150
C
Recommended Operating Conditions
2
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Notes
1. Absolute maximum of I
O
must be observed.
2. Unused control inputs must be held HIGH or LOW to prevent them from floating.
3 As measured between 0.8V and 2.0V, V
DD
= 3.0V.
.
n
i
M
.
x
a
M
ti
n
U
V
D
D
e
g
a
tl
o
v
y
l
p
p
u
S
g
n
it
a
r
e
p
O
8
.
1
6
.
3
V
y
l
n
O
n
o
it
n
e
t
e
R
a
t
a
D
2
.
1
6
.
3
V
H
I
e
g
a
tl
o
v
t
u
p
n
i
l
e
v
e
l
-
h
g
i
H
V
D
D
V
6
.
3
o
t
V
7
.
2
=
0
.
2
V
L
I
e
g
a
tl
o
v
t
u
p
n
i
l
e
v
e
l
-
w
o
L
V
D
D
V
6
.
3
o
t
V
7
.
2
=
8
.
0
V
I
e
g
a
tl
o
v
t
u
p
n
I
3
.
0
-
6
.
3
V
O
e
g
a
tl
o
v
t
u
p
t
u
O
e
t
a
t
S
e
v
it
c
A
0
V
D
D
e
t
a
t
S
ff
O
0
6
.
3
I
O
I
n
i
t
n
e
r
r
u
c
t
u
p
t
u
O
H
O
I/
L
O
V
D
D
V
6
.
3
o
t
V
0
.
3
=
V
D
D
V
0
.
3
o
t
V
7
.
2
=
V
D
D
V
7
.
2
o
t
V
3
.
2
=
V
D
D
V
8
.
1
=
4
6
/
2
3
-
4
2
8
1
6
A
m
/t
v
e
t
a
r
ll
a
f
r
o
e
si
r
n
o
it
si
s
n
a
rt
t
u
p
n
I
)
3
(
0
0
1
V
/
s
n
T
A
e
r
u
tr
e
p
m
e
t
ri
a
-
e
e
rf
g
n
it
a
r
e
p
O
0
4
-
5
8
C
4
PS8159D 11/23/98
PI74ALVTC16244
16-Bit Buffer Driver With 3-State Outputs
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Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted)
DC Characteristics (2.7V<V
DD
3.6V)
Notes
1. Duration of test must not exceed 1 second with only 1 output tested at a time.
r
e
t
e
m
a
r
a
P
s
n
o
it
i
d
n
o
C
V
D
D
.
n
i
M
.
p
y
T
.
x
a
M
s
ti
n
U
V
H
I
e
g
a
tl
o
V
t
u
p
n
I
l
e
v
e
L
H
G
I
H
6
.
3
-
7
.
2
0
.
2
V
V
L
I
e
g
a
tl
o
V
t
u
p
n
I
l
e
v
e
L
W
O
L
8
.
0
V
H
O
e
g
a
tl
o
V
t
u
p
t
u
O
l
e
v
e
L
H
G
I
H
I
H
O
=
-
0
0
1
A
V
D
D
2
.
0
-
I
H
O
=
-
A
m
2
1
7
.
2
2
.
2
I
H
O
=
-
A
m
8
1
0
.
3
4
.
2
I
H
O
=
-
A
m
4
2
2
.
2
I
H
O
=
-
A
m
2
3
0
.
2
V
L
O
e
g
a
tl
o
V
t
u
p
t
u
O
l
e
v
e
L
W
O
L
I
L
O
=
0
0
1
A
6
.
3
-
7
.
2
2
.
0
I
L
O
= 2
1 A
m
7
.
2
4
.
0
I
L
O
= 8
1 A
m
0
.
3
4
.
0
I
L
O
= 4
2 A
m
5
4
.
0
I
L
O
= 2
3 A
m
5
.
0
I
L
O
= 4
6 A
m
5
5
.
0
I
I
t
n
e
rr
u
C
e
g
a
k
a
e
L
t
u
p
n
I
V
I
V
=
D
D
D
N
G
r
o
,
6
.
3
0
.
5
A
I
Z
O
e
g
a
k
a
e
L
t
u
p
t
u
O
E
T
A
T
S
-
3
V
O
V
6
.
3
=
7
.
2
0
1
I
F
F
O
e
g
a
k
a
e
L
F
F
O
-r
e
w
o
P
t
n
e
rr
u
C
V
I
V
r
o
O
V
6
.
3
0
0
1
I
L
D
O
w
o
L
t
n
e
rr
u
C
t
u
p
t
u
O
V
IN
=
V
IH
V
r
o
IL
,
V
5
.
1
=
o
V
)
1
(
6
.
3
0
5
1
4
3
3
A
m
I
H
D
O
h
g
i
H
t
n
e
rr
u
C
t
u
p
t
u
O
V
IN
=
V
IH
V
r
o
IL
,
V
5
.
1
=
o
V
)
1
(
8
5
-
4
1
1
-
I
D
L
O
H
t
n
e
rr
u
C
d
l
o
H
s
u
B
st
u
p
t
u
O
B
r
o
A
V
I
V
8
.
0
=
0
.
3
5
7
A
V
I
V
0
.
2
=
5
7
-
V
I
V
6
.
3
o
t
0
=
6
.
3
0
0
5
I
D
D
t
n
e
rr
u
C
y
l
p
p
u
S
t
n
e
c
s
ei
u
Q
V
I
V
=
D
D
D
N
G
r
o
6
.
3
-
7
.
2
0
5
V
D
D
V
(
I
V
,
O
)
V
6
.
3
0
5
I
D
D
I
n
i
e
s
a
e
r
c
n
I
D
D
t
u
p
n
i
r
e
p
V
H
I
V
=
D
D
,
V
6
.
0
-
V
t
a
st
u
p
n
i
r
e
h
t
O
D
D
d
n
G
r
o
0
0
4
5
PS8159D 11/23/98
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PI74ALVTC16244
16-Bit Buffer Driver With 3-State Outputs
DC Characteristics (2.3V
V
DD
2.7V)
Notes
1. Not Guaranteed
2. Duration of test must not exceed 1 second with only 1 output tested at a time.
n
o
it
p
i
r
s
s
e
D
s
r
e
t
e
m
a
r
a
P
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it
i
d
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o
C
V
D
D
.
n
i
M
.
p
y
T
.
x
a
M
s
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n
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g
a
tl
o
V
t
u
p
n
I
l
e
v
e
L
H
G
I
H
7
.
2
-
3
.
2
6
.
1
V
V
L
I
e
g
a
tl
o
V
t
u
p
n
I
l
e
v
e
L
W
O
L
7
.
0
V
H
O
e
g
a
tl
o
V
t
u
p
t
u
O
l
e
v
e
L
H
G
I
H
I
H
O
0
0
1
-
=
A
V
D
D
2
.
0
-
I
H
O
A
m
2
1
-
=
3
.
2
8
.
1
I
H
O
A
m
8
1
-
=
7
.
1
V
L
O
e
g
a
tl
o
V
t
u
p
t
u
O
l
e
v
e
L
W
O
L
I
L
O
0
0
1
=
A
7
.
2
-
3
.
2
2
.
0
I
L
O
A
m
2
1
=
3
.
2
4
.
0
I
L
O
A
m
8
1
=
5
.
0
I
L
O
A
m
2
=
5
5
.
0
I
I
t
n
e
rr
u
C
e
g
a
k
a
e
L
t
u
p
n
I
V
1
V
=
D
D
D
N
G
r
o
7
.
2
0
.
5
A
I
Z
O
e
g
a
k
a
e
L
t
u
p
t
u
O
E
T
A
T
S
-
3
V
O
6
.
3
=
V
3
.
2
0
1
I
F
F
O
t
n
e
rr
u
C
e
g
a
k
a
e
L
F
F
O
-r
e
w
o
P
V
I
V
r
o
O
6
.
3
V
0
0
1
I
L
D
O
w
o
L
t
n
e
rr
u
C
t
u
p
t
u
O
V
N
I
=
V
H
I
r
o V
,
L
I
V
O
=
V
5
.
1
)
2
(
7
.
2
0
1
1
4
6
2
A
m
I
H
D
O
h
g
i
H
t
n
e
rr
u
C
t
u
p
t
u
O
V
N
I
=
V
H
I
r
o V
,
L
I
V
O
=
V
5
.
1
)
2
(
0
3
-
0
6
-
I
D
L
O
H
)
1
(
t
n
e
rr
u
C
d
l
o
H
s
u
B
st
u
p
t
u
O
B
r
o
A
V
I
V
7
.
0
=
5
.
2
0
9
A
V
I
V
7
.
1
=
0
9
-
I
D
D
t
n
e
rr
u
C
y
l
p
p
u
S
t
n
e
c
s
ei
u
Q
V
I
V
=
D
D
D
N
G
r
o
7
.
2
-
3
.
2
0
4
V
D
D
V
(
I
V
,
O
)
V
6
.
3
0
4
D
D
n
i
e
s
a
e
r
c
n
I
I
D
D
t
u
p
n
i
r
e
p
V
H
I
V
=
D
D
,
V
6
.
0
-
V
t
a
st
u
p
n
I
D
D
d
n
G
r
o
0
0
4
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted)
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