SN54ABT646, SN74ABT646

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCBS068E – JULY 1991 – REVISED JULY 1994

2–5

POST OFFICE BOX 655303

– 0.5 V to 7 V

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

– 0.5 V to 7 V

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

– 0.5 V to 5.5 V

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

96 mA

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

SN74ABT646

128 mA

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

–18 mA

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

– 50 mA

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

0.65 W

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

DW package

1.7 W

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

NT package

1.3 W

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

PW package

0.7 W

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

Storage temperature range

– 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 maximum package power dissipation is calculated using a junction temperature of 150

°C and a board trace length of 750 mils,

except for the NT package, which has a trace length of zero. For more information, refer to the

Package Thermal Considerations

application note in the 1994

ABT Advanced BiCMOS Technology Data Book, literature number SCBD002B.

recommended operating conditions (see Note 3)

SN54ABT646

SN74ABT646

UNIT

MIN

MAX

MIN

MAX

UNIT

VCC

Supply voltage

4.5

5.5

4.5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

VI

Input voltage

0

VCC

0

VCC

V

IOH

High-level output current

–24

–32

mA

IOL

Low-level output current

48

64

mA

∆t/∆v

Input transition rise or fall rate

5

5

ns / V

TA

Operating free-air temperature

–55

125

–40

85

°C

NOTE 3: Unused or floating pins (input or I/O) must be held high or low.

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.