SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244

SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244

OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SDLS144B – APRIL 1985 – REVISED FEBRUARY 2002

7

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS†

SN54LS’

SN74LS’

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

MIN

TYP‡

MAX

UNIT

VIK

VCC = MIN,

II = –18 mA

–1.5

–1.5

V

Hysteresis

(VT+ – VT–)

VCC = MIN

0.2

0.4

0.2

0.4

V

VOH

VCC = MIN,

IOH = –3 mA

VIH = 2 V,

VIL = MAX,

2.4

3.4

2.4

3.4

V

VOH

VCC = MIN,

IOH = MAX

VIH = 2 V,

VIL = 0.5 V,

2

2

V

VOL

VCC = MIN,

VIH = 2 V,

IOL = 12 mA

0.4

0.4

V

VOL

CC

,

VIL = MAX

IH

,

IOL = 24 mA

0.5

V

IOZH

VCC = MAX,

VIL = MAX

VIH = 2 V,

VO = 2.7 V

20

20

µA

IOZL

VCC = MAX,

VIL = MAX

VIH = 2 V,

VO = 0.4 V

–20

–20

µA

II

VCC = MAX,

VI = 7 V

0.1

0.1

mA

IIH

VCC = MAX,

VI = 2.7 V

20

20

µA

IIL

VCC = MAX,

VIL = 0.4 V

–0.2

–0.2

mA

IOS§

VCC = MAX,

–40

–225

–40

–225

mA

Outputs high

All

17

27

17

27

V

MAX

Outputs low

’LS240

26

44

26

44

ICC

VCC = MAX,

Output open

Outputs low

’LS241, ’LS244

27

46

27

46

mA

Out ut oen

Outputs disabled

’LS240

29

50

29

50

Out uts disabled

’LS241, ’LS244

32

54

32

54

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

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

§ Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second.

PARAMETER

TEST CONDITIONS

’LS240

’LS241, ’LS244

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

tPLH

RL = 667 Ω

C45 pF

9

14

12

18

ns

tPHL

RL = 667 Ω,

CL = 45 pF

12

18

12

18

ns

tPZL

RL = 667 Ω

C45 F

20

30

20

30

ns

tPZH

RL = 667 Ω,

CL = 45 pF

15

23

15

23

ns

tPLZ

RL 667 Ω

CL 5 pF

10

20

10

20

ns

tPHZ

RL = 667 Ω,

CL = 5 pF

15

25

15

25

ns