1
PS8204A 04/06/01
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Product Features
PI74ALVC162836 is designed for low-voltage operation,
V
CC
= 2.3V to 3.6V
Supports PC100 Registered DIMM
Typical V
OLP
(Output Ground Bounce)
< 0.8V at V
CC
= 3.3V, T
A
= 25C
Typical V
OHV
(Output V
OH
Undershoot)
< 2.0V at V
CC
= 3.3V, T
A
= 25C
Outputs have equivalent 26-ohm series resistors
Industrial operation at 40C to +85C
Packages available:
56-pin 240 mil wide plastic TSSOP (A)
56-pin 173 mil wide plastic TVSOP (K)
56-pin 300 mil wide plastic SSOP (V)
PI74ALVC162836
20-Bit Universal Bus Driver
with 3-State Outputs
Logic Block Diagram
Product Description
Pericom Semiconductors PI74ALVC series of logic circuits are
produced using the Companys advanced submicron CMOS
technology, achieving industry leading speed.
The 20-bit PI74ALVC162836 universal bus driver is designed
for 2.3V to 3.6V V
CC
operation.
Data flow from A to Y is controlled by the Output Enable (OE) input.
The device operates in the transparent mode when the latch-enable
(LE) input is LOW. When LE is HIGH, the A data is latched if the clock
(CLK) input is held at a high or low logic level. If LE is HIGH, the A
data is stored in the latch/flip-flop on the low-to-high transition of
CLK. When OE is HIGH , the outputs are in the high-impedance state,
but all the inputs are enabled and data is capable of being stored in
the register.
To ensure the high-impedance state during power up or power down,
OE should be tied to V
CC
through a pullup resistor; the minimum
value of the resistor is determined by the current-sinking capability
of the driver.
OE
CLK
LE
A1
1
56
29
55
1D
CLK
C1
Y1
2
V
TO 19 OTHER CHANNELS
Pin Name
Description
OE
Output Enable Input (Active LOW)
LE
Latch Enable (Active LOW)
CLK
Clock Input
A
Data Input
Y
Data Output
GND
Ground
V
CC
Power
Product Pin Description
2
PS8204A 04/06/01
PI74ALVC162836
20-Bit Universal Bus Driver with 3-State Outputs
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s
t
u
p
n
I
Y
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t
u
p
t
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O
E
O
E
L
K
L
C
A
H
X
X
X
Z
L
L
X
L
L
L
L
X
H
H
L
H
L
L
L
H
H
H
L
H
H
r
o
L
X
o
Y
)
2
(
Truth Table
(1)
Note:
1 H = High Signal Level
L = Low Signal Level
Z = High Impedance
= Transition LOW-to-HIGH
X = Irrelevant
2. Output level before the indicated steady-state input
conditions were established.
Product Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
25
26
27
28
32
31
30
29
OE
Y1
Y2
GND
Y3
Y4
VCC
Y5
Y6
Y7
GND
Y8
Y9
Y10
Y11
Y12
Y13
GND
Y14
Y15
Y16
VCC
Y17
Y18
GND
Y19
Y20
NC
CLK
A1
A2
GND
A3
A4
VCC
A5
A6
A7
GND
A8
A9
A10
A11
A12
A13
GND
A14
A15
A16
VCC
A17
A18
GND
A19
A20
LE
56-Pin
A, K, V
PI74ALVC162836
20-Bit Universal Bus Driver with 3-State Outputs
3
PS8204A 04/06/01
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Storage Temperature .................................................. 65C to +150C
Ambient Temperature with Power Applied .................. 40C to +85C
Input Voltage Range, V
IN ....................................................
0.5V to V
CC
+0.5V
Output Voltage Range, V
OUT ............................................
0.5V to V
CC
+0.5V
DC Input Voltage ........................................................... 0.5V to +5.0V
DC Output Current ................................................................... 100 mA
Power Dissipation ......................................................................... 1.0W
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 conditions for ex-
tended periods may affect reliability.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
1. Unused control inputs must be held HIGH or LOW to prevent them from floating.
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C
Recommended Operating Conditions
(1)
4
PS8204A 04/06/01
PI74ALVC162836
20-Bit Universal Bus Driver with 3-State Outputs
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Timing Requirements over Operating Range
Note:
1. Unused control inputs must be held HIGH or LOW to prevent them from floating.
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 3.3V, +25C ambient and maximum loading.
3. For I/O ports, the Ioz includes the input leakage current.
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PI74ALVC162836
20-Bit Universal Bus Driver with 3-State Outputs
5
PS8204A 04/06/01
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Switching Characteristics Over Operating Range
(1)
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
Notes:
1. Unused control inputs must be held HIGH or LOW to prevent them from floating.
Operating Characteristics, T
A
= 25C
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