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Timing Requirements

Timing Requirements

Switching Characteristics

SN74AHC123A-EP

DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR

SCLS703A – JULY 2006 – REVISED MARCH 2007

over recommended operating free-air temperature range, V

CC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)

TA = 25°C

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

MIN

TYP

MAX

CLR

5

5

tw

Pulse duration

ns

A or B trigger

5

5

Rext = 1 kΩ, Cext = 100 pF

(1)

76

(1)

ns

trr

Pulse retirgger time

Rext = 1 kΩ, Cext = 0.01 µF

(1)

1.8

(1)

µs

(1)

See retriggering data in the application information section.

over recommended operating free-air temperature range, V

CC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)

TA = 25°C

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

MIN

TYP

MAX

CLR

5

5

tw

Pulse duration

ns

A or B trigger

5

5

Rext = 1 kΩ, Cext = 100 pF

(1)

59

(1)

ns

trr

Pulse retirgger time

Rext = 1 kΩ, Cext = 0.01 µF

(1)

1.5

(1)

µs

(1)

See retriggering data in the application information section.

over recommended operating free-air temperature range, V

CC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)

TA = 25°C

FROM

TO

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

(INPUT)

(OUTPUT)

MIN

TYP

MAX

tPLH

9.5(1) 20.6(1)

1(1)

24(1)

A or B

Q or Q

CL = 15 pF

ns

tPHL

10.2(1) 20.6(1)

1(1)

24(1)

tPLH

7.5(1) 15.8(1)

1(1) 18.5(1)

CLR

Q or Q

CL = 15 pF

ns

tPHL

9.3(1) 15.8(1)

1(1) 18.5(1)

tPLH

10(1) 22.4(1)

1(1)

26(1)

CLR trigger

Q or Q

CL = 15 pF

ns

tPHL

10.6(1) 22.4(1)

1(1)

26(1)

tPLH

10.5

24.1

1

27.5

A or B

Q or Q

CL = 50 pF

ns

tPHL

11.8

24.1

1

27.5

tPLH

8.9

19.3

1

22

CLR

Q or Q

CL = 50 pF

ns

tPHL

10.5

19.3

1

22

tPLH

11

25.9

1

29.5

CLR trigger

Q or Q

CL = 50 pF

ns

tPHL

12.3

25.9

1

29.5

CL = 50 pF,

Cext = 28 µF,

182

240

300

ns

Rext = 2 kΩ

CL = 50 pF,

tw(2)

Q or Q

Cext = 0.01 µF,

90

100

110

90

110

µs

Rext = 10 kΩ

CL = 50 pF,

Cext = 0.1 µF,

0.9

1

1.1

0.9

1.1

ms

Rext = 10 kΩ

∆t

w

(3)

±1%

(1)

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

(2)

tw = Pulse duration at Q and Q outputs

(3)

∆t

w = Output pulse-duration variation (Q and Q) between circuits in same package

5

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