SN54ALS652, SN54ALS653, SN54AS651, SN54AS652

SN74ALS651A, SN74ALS652A, SN74ALS653, SN74ALS654, SN74AS651, SN74AS652

OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

SDAS066F – DECEMBER 1983 – REVISED OCTOBER 1996

7

POST OFFICE BOX 655303

7 V

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

7 V

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

I / O ports

5.5 V

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

– 55

°C to 125°C

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

SN74ALS651A, SN74ALS652A

0

°C to 70°C

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

–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.

recommended operating conditions

SN74ALS651A

UNIT

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

–15

mA

I

Low level output current

24

mA

IOL

Low-level output current

48‡

mA

fclock

Clock frequency

0

40

MHz

t

Pulse duration

CLKBA or CLKAB high

12.5

ns

tw

Pulse duration

CLKBA or CLKAB low

12.5

ns

tsu

Setup time before CLKAB

↑ or CLKBA↑

A or B

10

ns

th

Hold time after CLKAB

↑ or CLKBA↑

A or B

0

ns

TA

Operating free-air temperature

0

70

°C

‡ Applies only to the SN74ALS651A-1 and only if VCC is maintained between 4.75 V and 5.25 V

recommended operating conditions

SN54ALS652

SN74ALS652A

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.7

0.8

V

IOH

High-level output current

–12

–15

mA

I

Low level output current

12

24

mA

IOL

Low-level output current

48‡

mA

fclock

Clock frequency

0

35

0

40

MHz

t

Pulse duration

CLKBA or CLKAB high

14.5

12.5

ns

tw

Pulse duration

CLKBA or CLKAB low

14.5

12.5

ns

tsu

Setup time before CLKAB

↑ or CLKBA↑

A or B

15

10

ns

th

Hold time after CLKAB

↑ or CLKBA↑

A or B

5

0

ns

TA

Operating free-air temperature

–55

125

0

70

°C

‡ Applies only to the SN74ALS652A-1 and only if VCC is maintained between 4.75 V and 5.25 V