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PI74ALVCH16244A

16-Bit Buffer Driver with 3-State Outputs

Pericom Semiconductor 

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16-Bit Buffer Driver

with 3-State Outputs

Product Features

• PI74ALVCH16244 is designed for low-voltage operation

• VCC = 2.3V to 3.6V

• Hysteresis on all inputs

• Typical VOLP (Output Ground Bounce)

< 0.8V at VCC = 3.3V, TA = 25°C

• Typical VOHV (Output VOH Undershoot)

< 2.0V at VCC = 3.3V, TA = 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

• Packages available:

– 48-pin 240 mil wide plastic TSSOP (A)

– 48-pin 300 mil wide plastic SSOP (V)

Product Description

Pericom Semiconductor’s PI74ALVCH series of logic circuits

are produced using the Company’s advanced 0.5 micron CMOS

technology, achieving industry leading speed.

The PI74ALVCH16244 is an non-inverting 16-bit buffer/driver

designed for low-voltage 2.3V to 3.6V VCC 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 inverting 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 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.

Logic Block Diagram

1OE 1

1A1 47

46

1A2

1A3 44

43

1A4

2 1Y1

3

1Y2

5 1Y3

6

1Y4

3OE 25

3A1 36

35

3A2

3A3 33

32

3A4

13 3Y1

14

3Y2

16 3Y3

17

3Y4

2OE 48

2A1 41

40

2A2

38

2A3

37

2A4

8 2Y1

9 2Y2

11 2Y3

12 2Y4

4OE 24

4A1 30

29

4A2

27

4A3

26

4A4

19 4Y1

20

4Y2

22

4Y3

23

4Y4

1

PS8087B 07/28/00

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