74AHC123APW Просмотр технического описания (PDF) - Philips Electronics

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74AHC123APW

Dual retriggerable monostable multivibrator with reset

Philips Electronics 

Philips Semiconductors

Dual retriggerable monostable multivibrator

with reset

Product specification

74AHC123A;

74AHCT123A

SYMBOL PARAMETER

TEST CONDITIONS

WAVEFORMS

CL

Tamb (°C)

25

−40 to +85 −40 to +125 UNIT

MIN. TYP. MAX. MIN. MAX. MIN. MAX.

VCC = 4.5 to 5.5 V; note 2

tW

trigger pulse

see Fig 8

width; nA = LOW

50 pF 5.0 − −

5.0 −

5.0 −

ns

trigger pulse

see Fig 8

width; nB = HIGH

5.0 − −

5.0 −

5.0 −

ns

reset pulse width;

nRD = LOW

output pulse

width; nQ = HIGH;

nQ = LOW

see Fig 9

CEXT = 28 pF;

REXT = 2 kΩ;

note 3; see Figs 8,

9 and 10

5.0 − −

5.0 −

5.0 −

ns

−

100 200 −

240 −

240 ns

CEXT = 0.01 µF;

REXT = 10 kΩ;

note 3; see

Figs 8, 9 and 10

90 100 110 90 110 85 115 µs

CEXT = 0.1 µF;

REXT = 10 kΩ;

note 3; see Figs 8,

9 and 10

0.9 1 1.1 0.9 1.1 0.85 1.15 ms

trt

retrigger time;

CEXT = 100 pF;

nA to nB

REXT = 1 kΩ; see

Figs 8, 9 and 10

− 39 −

−

−

−

−

ns

CEXT = 0.01 µF;

REXT = 1 kΩ; see

Figs 8, 9 and 10

− 1.2 −

−

−

−

−

µs

Notes

1. Typical values are measured at VCC = 3.3 V and Tamb = 25 °C.

2. Typical values are measured at VCC = 5.0 V and Tamb = 25 °C.

3. For CEXT ≥ 10 nF the typical value of the pulse width tW (µs) = REXT (kΩ) × CEXT (nF).

2000 Mar 15

14

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