鈥?/div>
Packages available:
聳 48-pin 240 mil wide plastic TSSOP (A)
聳 48-pin 300 mil wide plastic SSOP (V)
Product Description
16-Bit Buffer/Driver
with 3-State Outputs
Pericom Semiconductor聮s PI74ALVCH series of logic circuits are
produced in the Company聮s advanced 0.5 micron CMOS technology,
achieving industry leading speed.
The PI74ALVCHT16244 is a 16-bit buffer/driver designed for 2.3V
to 3.6V V
CC
operation.
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 symmetrical active-low
output-enable (OE) inputs.
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.
The PI74ALVCHT16244 has 聯(lián)Bus Hold聰 which retains the data
input聮s last state whenever the data input goes to high-impedance
preventing 聯(lián)floating聰 inputs and eliminating the need for pullup/
down resistors.
The PI74ALVCHT16244 can be driven from either 3.3V or 5.0V
devices allowing this device to be used as a translator in a mixed
3.3/5.0V system.
Logic Block Diagram
1
OE
1
3
OE
25
1
A
1
47
2
1
Y
1
3
A
1
36
13
3
Y
1
1
A
2
46
3
1
Y
2
3
A
2
35
14
3
Y
2
1
A
3
44
5
1
Y
3
3
A
3
33
16
3
Y
3
1
A
4
43
6
1
Y
4
3
A
4
32
17
3
Y
4
2
OE
48
4
OE
24
2
A
1
41
8
2
Y
1
4
A
1
30
19
4
Y
1
2
A
2
40
9
29
2
Y
2
4
A
2
20
4
Y
2
2
A
3
38
11
2
Y
3
4
A
3
27
22
4
Y
3
2
A
4
37
12
26
2
Y
4
4
A
4
23
4
Y
4
1
PS8309
07/30/98
1
2
3
4
