SN54ABT162827A, SN74ABT162827A

20BIT BUFFERS/DRIVERS

WITH 3STATE OUTPUTS

SCBS248F − JULY 1993 − REVISED JUNE 2004

2

POST OFFICE BOX 655303

description/ordering information (continued)

disables the outputs, preventing damaging current backflow through the devices when they are powered down.

The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,

which prevents driver conflict.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

FUNCTION TABLE

(each 10-bit buffer)

INPUTS

OUTPUT

OE1

OE2

A

OUTPUT

Y

L

L

L

L

L

LH

H

H

XX

Z

X

H

X

Z

logic diagram (positive logic)

1Y1

2

1

55

1OE1

1OE2

56

2Y1

15

28

42

29

2OE1

2OE2

To Nine Other Channels

To Nine Other Channels

1A1

2A1

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−0.5 V to 5.5 V

. . . . . . . . . . . . . . . . . . .

30 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−18 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

64

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DL package

56

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51-7.