74HC423 Dual Retriggerable Monostable Multivibrator IC (74423 IC) DIP-16 Package

Dual retriggerable monostable multivibrator with reset

SKU: RW-02665

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Description

Dual retriggerable monostable multivibrator with reset

The 74HC423 is a dual retriggerable monostable multivibrator with output pulse width control by two methods. The basic pulse time is programmed by selection of an external resistor (REXT) and capacitor (CEXT). Once triggered, the basic output pulse width may be extended by retriggering (nA) or (nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. When nRD is LOW, it forces the nQ output LOW, the nQ output HIGH and also inhibits the triggering. Schmitt-trigger action in the nA and nB inputs, makes the circuit highly tolerant to slower input rise and fall times. The ‘423’ is identical to the ‘123’ but cannot be triggered via the reset input. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.


Features :

  • DC triggered from active HIGH or active LOW inputs
  • Retriggerable for very long pulses up to 100 % duty factor
  • Direct reset terminates output pulse
  • Schmitt-trigger action on all inputs except for the reset input
  • Complies with JEDEC standard no. 7A
  • Input levels:

                   For 74HC423: CMOS level

  • ESD protection:

                  HBM JESD22-A114F exceeds 2000 V

                  MM JESD22-A115-A exceeds 200 V

  • Specified from -40 ?C to +85 ?C and from -40 ?C to +125 ?C


Specifications :-

Symbol

Parameter

Min

Max

Unit

VCC

Supply Voltage

 -0.5

 +7

V

IIK

input clamping current

 –

 +20

mA

Iok

output clamping current

  – 

 +20

mA

IO

output current

 –

  +25 

mA

ICC

supply current

 –

50

mA

IGND

ground current

 -50

 –

mA

Tstg

storage temperature

 -65

 +150

?C

Ptot

total power dissipation

        –

     500

mW


Package Includes :-

1 X 74HC423 Dual Retriggerable Monostable Multivibrator IC (74423 IC) DIP-16 Package

Additional information

Operating voltage

2.5 3.0V

Pixel Resolution

0.3MP

Photosensitive array

640 x 480

Optical Size

1.6 inch

Angel of view

67 degrees

Maximum Frame Rate

30fps VGA

Sensitivity

1.3V/(Lux-sec)

Dormancy

Less than 20A

Power consumption

60mW/15fpsVGA YUV

Temperature operation Range

-30 C ~ 70 C

Pixel area

3.6 x 3.6 m

Signal to noise ratio (SNR)

46 dB

Dynamic range

52 dB

Specification

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