SN54LV221A, SN74LV221A

DUAL MONOSTABLE MULTIVIBRATORS

WITH SCHMITT TRIGGER INPUTS

SCLS450G − DECEMBER 1999 − REVISED APRIL 2005

7

POST OFFICE BOX 655303

switching

characteristics

over

recommended

operating

free-air

temperature

range,

PARAMETER

FROM

TO

TEST

TA = 25°C

SN54LV221A

SN74LV221A

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST

CONDITIONS

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

A or B

Q or Q

14.6*

31.4*

1*

37*

1

37

tpd

CLR

Q or Q

CL = 15 pF

13.2*

25*

1*

29.5*

1

29.5

ns

tpd

CLR trigger

Q or Q

CL = 15 pF

15.2*

33.4*

1*

39*

1

39

ns

A or B

Q or Q

16.7

36

1

42

1

42

tpd

CLR

Q or Q

CL = 50 pF

15

32.8

1

34.5

1

34.5

ns

tpd

CLR trigger

Q or Q

CL = 50 pF

17.4

38

1

44

1

44

ns

CL = 50 pF,

Cext = 28 pF,

Rext = 2 kΩ

203

260

320

320

ns

tw†

Q or Q

CL = 50 pF,

Cext = 0.01 µF,

Rext = 10 kΩ

90

100

110

90

110

90

110

ms

CL = 50 pF,

Cext = 0.1 µF,

Rext = 10 kΩ

0.9

1

1.1

0.9

1.1

0.9

1.1

ms

∆tw‡

CL = 50 pF

±1

%

* On products compliant to MIL-PRF-38535, this parameter is not production tested.

† tw = Pulse duration at Q and Q outputs

‡ ∆tw = Output pulse-duration variation (Q and Q) between circuits in same package

switching

characteristics

over

recommended

operating

free-air

temperature

range,

PARAMETER

FROM

TO

TEST

TA = 25°C

SN54LV221A

SN74LV221A

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST

CONDITIONS

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

A or B

Q or Q

10.2*

20.6*

1*

24*

1

24

tpd

CLR

Q or Q

CL = 15 pF

9.3*

15.8*

1*

18.5*

1

18.5

ns

tpd

CLR trigger

Q or Q

CL = 15 pF

10.6*

22.4*

1*

26*

1

26

ns

A or B

Q or Q

11.8

24.1

1

27.5

1

27.5

tpd

CLR

Q or Q

CL = 50 pF

10.6

19.3

1

22

1

22

ns

tpd

CLR trigger

Q or Q

CL = 50 pF

12.3

25.9

1

29.5

1

29.5

ns

CL = 50 pF,

Cext = 28 pF,

Rext = 2 kΩ

186

240

300

300

ns

tw†

Q or Q

CL = 50 pF,

Cext = 0.01 µF,

Rext = 10 kΩ

90

100

110

90

110

90

110

ms

CL = 50 pF,

Cext = 0.1 µF,

Rext = 10 kΩ

0.9

1

1.1

0.9

1.1

0.9

1.1

ms

∆tw‡

CL = 50 pF

±1

%

* On products compliant to MIL-PRF-38535, this parameter is not production tested.

† tw = Pulse duration at Q and Q outputs

‡ ∆tw = Output pulse-duration variation (Q and Q) between circuits in same package

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.