HD74HC423A 데이터 시트보기 (PDF) - Renesas Electronics

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HD74HC423A

Dual Retriggerable Monostable Multivibrators

Renesas Electronics 

HD74HC423A

Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)

Ta = 25°C

Ta = –40 to +85°C

Item

Symbol VCC (V) Min Typ Max Min

Max Unit

Test Conditions

Propagation delay tPLH

time

2.0

— — 210

—

4.5 — 20 42

—

265 ns A or B to Q

53

6.0 — — 36

—

45

tPHL

2.0

— — 240

—

4.5 — 21 48

—

300 ns A or B to Q

60

6.0 — — 41

—

51

tPHL

2.0

— — 170

—

215 ns Clear to Q

4.5 — 17 34

—

43

6.0 — — 29

—

37

tPLH

2.0

— — 180

—

4.5 — 15 36

—

225 ns Clear to Q

45

6.0 — — 31

—

38

Pulse width

tw

2.0 150 — —

190

—

ns A, B, Clear

4.5 30 6 —

38

—

6.0 26 — —

33

—

Removal time

trem

2.0

0

——

5

4.5

0 –3 —

5

—

ns Clear

—

6.0

0

——

5

—

Minimum output

tWQ (min)

2.0

— 1.5 —

—

pulse width

4.5 — 450 —

—

—

µs Cext = 28 pF Rext = 6 kΩ

—

ns

Rext = 2 kΩ

6.0 — 380 —

—

—

Output pulse width tWQ

4.5 — 1.0 —

—

Output rise/fall

tTLH

2.0 — — 75

—

time

tTHL

4.5 — 5 15

—

—

ms Cext = 0.1 µF, Rext = 10 kΩ

95

ns

19

6.0 — — 13

—

16

Input capacitance Cin

—

— — 20

—

20

pF Pins 7 & 15

—

— 5 10

—

10

Other pins

Caution in use: In order to prevent any malfunctions due to noise, connect a highfrequency performance capacitor

between VCC and GND, and keep the wiring between the external components and Cext, Rext/Cext pins

as short as possible.

Test Circuit

Measurement point

CL*

Note: CL includes the probe and fig capacitance.

Rev.2.00 Mar 30, 2006 page 4 of 8

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