SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDAS272A – NOVEMBER 1994 – REVISED JANUARY 2003

3

POST OFFICE BOX 655303

recommended operating conditions (see Note 2)

SN54ALS245A

SN74ALS245A

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

IOL

Low level output current

12

24

mA

IOL

Low-level output current

48†

mA

TA

Operating free-air temperature

– 55

125

0

70

°C

† Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V

NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54ALS245A

SN74ALS245A

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

MIN

TYP‡

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

–1.5

–1.5

V

VCC = 4.5 V to 5.5 V,

IOH = – 0.4 mA

VCC – 2

VCC – 2

VOH

IOH = – 3 mA

2.4

3.2

2.4

3.2

V

VOH

VCC = 4.5 V

IOH = – 12 mA

2

V

IOH = – 15 mA

2

IOL= 12 mA

0.25

0.4

0.25

0.4

VOL

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

V

IOL = 48 mA†

0.35

0.5

II

Control inputs

VCC =5 5V

VI = 7 V

0.1

0.1

mA

II

A or B ports

VCC = 5.5 V

VI = 5.5 V

0.1

0.1

mA

IIH

Control inputs

VCC =5 5V

VI =2 7V

20

20

µA

IIH

A or B ports§

VCC = 5.5 V,

VI = 2.7 V

20

20

µA

IIL

Control inputs

VCC =5 5V

VI =0 4V

– 0.1

– 0.1

mA

IIL

A or B ports§

VCC = 5.5 V,

VI = 0.4 V

– 0.1

– 0.1

mA

IO¶

VCC = 5.5 V,

VO = 2.25 V

– 20

–112

– 30

–112

mA

Outputs high

30

48

30

45

ICC

VCC = 5.5 V

Outputs low

36

60

36

55

mA

Outputs disabled

38

63

38

58

† Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V

‡ All typical values are VCC = 5 V, TA = 25°C.

§ For I/O ports, the parameters IIH and IIL include the off-state output current.

¶ The output conditions have been chosen to produce a current that closely approximates one-half of the true short-circuit output current, IOS.