1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
Features
• The PI74VCX Family is designed for low voltage
• 3.6V Tolerant Inputs and Outputs
• Supports Live Insertion
• Balanced Drive, ±24mA
• Uses patented Noise Reduction Circuitry
• Typical V
• Typical V
• Power-Off high impedance inputs and outputs
• Industrial operation at –40°C to +85°C
• Packaging (Pb-free & Green available):
Block Diagram
operation, C
at V
at V
– 48-pin 240-mil wide plastic TSSOP (A)
DD
DD
08-0291
= 2.5V, T
= 2.5V, T
OLP
OHV
D
(Output Ground Bounce) < 0.6V
(Output V
= 1.8V to 3.6V
A
A
= 25ºC
= 25ºC
OH
1
2
OE
OE
1
1
1
1
2
2
2
2
A
A
A
A
A
A
A
A
Undershoot) < –0.6V
1
2
3
4
1
2
3
4
47
46
44
43
48
41
40
38
37
1
11
12
2
3
5
6
8
9
1
1
1
1
2
2
2
2
Y
Y
Y
Y
Y
Y
Y
Y
1
2
3
4
1
2
3
4
1
Description
Pericom Semiconductor’s PI74VCX16244 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 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.
3
4
OE
OE
3
3
3
3
4
4
4
4
A
A
A
A
A
A
A
A
1
2
3
4
1
2
3
4
25
36
35
33
32
24
30
29
27
26
13
14
16
17
19
20
22
23
3
3
3
3
4
4
4
4
with 3-State Outputs
Y
Y
Y
Y
Y
Y
Y
Y
16-Bit Buffer/Driver
1
2
3
4
1
2
3
4
PI74VCX16244
PS8160E
11/10/08