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PI74ALVCH16244
16-Bit Buffer Driver
with 3-State Outputs
Features
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Designed for low-voltage operation
V
CC
= 2.3V to 3.6V
Hysteresis on all inputs
Typical V
OLP
(Output Ground Bounce)
< 0.8V at V
CC
= 3.3V, T
A
= 25°C
Typical V
OHV
(Output V
OH
Undershoot)
< 2.0V at V
CC
= 3.3V, T
A
= 25°C
Bus Hold retains last active bus state during 3-State,
eliminating the need for external pullup resistors
Industrial operation at –40°C to +85°C
Packaging:
– 48-pin 240-mil wide plastic TSSOP (A)
Description
Pericom Semiconductor’s PI74ALVCH16244 is an non-inverting
16-bit buffer/driver designed for low-voltage 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 non-inverting outputs and symmetri-
cal 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 in which
the minimum value is determined by the current-sinking capability
of the driver.
The PI74ALVCH16244 has “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.
Block Diagram
1OE
1
2
3
5
6
1Y1
1Y2
1Y3
1Y4
3OE 25
3A1 36
3A2 35
3A3 33
3A4 32
4OE 24
4A1 30
4A2 29
4A3 27
4A4 26
1A1 47
1A2 46
1A3 44
1A4 43
2OE 48
2A1 41
2A2 40
2A3 38
2A4 37
13
14
16
17
3Y1
3Y2
3Y3
3Y4
8
9
11
12
2Y1
2Y2
2Y3
2Y4
19
20
22
23
4Y1
4Y2
4Y3
4Y4
1
PS8087C
10/05/04
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
