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Электронный компонент: PI74VCX16241

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Vcx16241
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1
PS8324 09/14/98
Product Description
Pericom Semiconductor's PI74VCX series of logic circuits is
produced in the Company's advanced 0.35 micron CMOS
technology, achieving industry leading speed.
The 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 complementary
active-low output-enable (OE and OE) inputs.
To ensure the high-impedance state during power up or power
down, OE should be tied to Vcc through a pullup resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
The PI74VCX family is I/O Tolerant, allowing it to operate in
1.8/3.6V systems.
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The PI74VCX Family is designed for low voltage
operation, V
DD
= 1.8V to 3.6V
3.6V Tolerant Inputs and Outputs
Supports Live Insertion
Balanced Drive, 24mA
Uses patented Noise Reduction Circuitry
Typical V
OLP
(Output Ground Bounce) <0.6V
at V
DD
= 2.5V, T
A
= 25C
Typical V
OHV
(Output V
OH
Undershoot) < -0.6V
at V
DD
= 2.5V, T
A
= 25C
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 300 mil wide plastic SSOP (V)
PI74VCX16241
16-Bit Buffer/Driver
with 3-State Outputs
Logic Block Diagram
Product Features
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2
PS8324 09/14/98
PI74VCX16241
16-BIT BUFFER DRIVER WITH 3-STATE OUTPUTS
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s
t
u
p
n
I
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p
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O
E
O
3
,
E
O
2
A
3
,
A
2
Y
3
,
Y
2
H
H
H
H
L
L
L
X
Z
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t
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I
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p
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O
E
O
4
,
E
O
1
A
4
,
A
1
Y
4
,
Y
1
L
H
H
L
L
L
H
X
Z
1
2
3
4
5
6
7
8
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
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17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
32
31
30
29
28
27
26
25
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 Tables
(1)
Notes:
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
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
V48
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PS8324 09/14/98
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PI74VCX16241
16-BIT BUFFER DRIVER WITH 3-STATE OUTPUTS
Note:
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 conditions above those
indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating
conditionsfor 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
CC
+0.5
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
) .............................. 50mA
DC V
DD
or GND Current per Supply Pin (I
CC
or GND) ...... 100mA
Storage Temperature Range, T
stg
.............................. 65
C to 150
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.
.
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3
=
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7
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2
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3
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2
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1
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5
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4
PS8324 09/14/98
PI74VCX16241
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)
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2
2
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=
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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
5
.
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3
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5
7
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PS8324 09/14/98
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PI74VCX16241
16-BIT BUFFER DRIVER WITH 3-STATE OUTPUTS
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H
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0
0
1
-
=
A
8
.
1
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D
D
2
.
0
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I
H
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A
m
6
-
=
4
.
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I
L
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0
0
1
=
A
2
.
0
I
L
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A
m
6
=
3
.
0
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8
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1
=
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,
V
0
.
0
=
0
.
5
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I
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T
S
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0
V
O
V
6
.
3
V
I
V
=
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I
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I
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(
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V
,
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3
8
.
1
0
2
DC Characteristics (2.3V


V
DD


2.7V)
DC Characteristics (1.8V


V
DD


2.3V)
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted) (continued from previous page)
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0
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1
-
=
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2
.
0
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I
H
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A
m
6
-
=
3
.
2
0
.
2
I
H
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A
m
2
1
-
=
8
.
1
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H
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8
1
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=
7
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2
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2
2
.
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2
1
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.
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2
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,
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6
.
3
0
2
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PS8324 09/14/98
PI74VCX16241
16-BIT BUFFER DRIVER WITH 3-STATE OUTPUTS
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
AC Electrical Characteristics
(1)
Notes
1. For CL = 50pF add approximatly 300ps to AC maximum specification
2. Skew is defined as the absolute value of the difference between the actual propagation delay for any
two separate outputs of the same device. The specification applies to any outputs switching in the same
direction, either HIGH or LOW (t
OSHL
)
or LOW to HIGH (t
OSLH
).
Capacitance
Dynamic Switching Characteristics
l
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P
C
,
C
5
8
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t
C
0
4
-
=
A
T
L
R
,
F
p
0
3
=
L
0
0
5
=
s
ti
n
U
V
D
D
V
3
.
3
=
V
3
.
0
V
D
D
V
5
.
2
=
V
2
.
0
V
D
D
V
8
.
1
=
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background image
7
PS8324 09/14/98
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI74VCX16241
16-BIT BUFFER DRIVER WITH 3-STATE OUTPUTS
Test Circuits and Switching Waveforms
Parameter Measurement Information (V
DD
= 1.8V - 3.6V)
Setup, Hold, and Release Timing
Pulse Width
Switch Position
Propagaton Delay
Enable Disable Timing
Notes:
A. C
L
includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions
such that the output is LOW except when disabled by
the output control.
Waveform 2 is for an output with internal conditions
such that the output is HIGH except when disabled by
the output control.
C. All input pulses are supplied by generators having the
following characteristics: PRR
10 MHz, Z
O
= 50
,
t
r
2ns, t
f
2ns, measured from 10% to 90%, unless
otherwise specified.
D. The outputs are measured one at a time with one
transition per measurement.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
Output
Control
(Active LOW)
Output
Waveform 2
S1 at GND
(see Note B)
t
PZL
t
PLZ
V
DD
0V
V
DD
V
OL
0V
Output
Waveform 1
S1 at 2xV
DD
(see Note B)
+0.15V
-0.15V
V
OH
V
DD
t
PHZ
t
PZH
V
DD/2
V
DD/2
V
DD
/2
C
L
R
1
500
50pF
From Output
Under Test
GND
2 x V
DD
Open
(See Note A)
R
L
500
3
Low-High-Low
Pulse
t
W
High-Low-High
Pulse
V
DD
0V
V
DD
0V
V
DD/2
V
DD/2
Input
Opposite Phase
Input Transition
t
PLH
t
PHL
t
PLH
t
PHL
V
DD
0V
V
DD
V
OL
V
DD
0V
Output
V
DD/2
V
DD/2
V
DD/2
Data
Input
t
H
V
DD
t
SU
0V
Timing
Input
V
DD
0V
V
DD/2
V
DD/2
t
s
e
T
1
S
t d
p
n
e
p
O
t
/
Z
L
P
t L
Z
P
x
2 V D
D
t
/
Z
H
P
t H
Z
P
D
N
G