(China (Mainland))
Product Summary
These D-C triggered multivibrators feature output pulse-duration control by three methods.The basic pulse time is programmed by selection of external resistance and capacitiance values(see typical application data).The '122 and 'LS122 have internal timing resistors that allow the circuits to be used with only an external capacitor,if so desired.Once triggered,the basic pulse duration may be extended by retriggering the gated low-level-active(A) or high-level-active(B) inputs,or be reduced by use of the overriding clear.Figure 1 illustrates pulse control by retriggering and early clear.They are provided enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 millivolt per nanosecond.The Rint in nominal 10 kΩ for '122 and 'LS122.
Parametrics
Absolute maximum ratings over operating free-air temperature range(unless otherwise noted):
(1)Supply voltage.Vcc:7V;
(2)Input voltage:'122,'123,'130:5.5V;
(3)Operating free-air temperature range:SN54':-55℃ to 125℃;SN74':0℃ to 70℃;
(4)Storage temperature range:-65℃ to 150℃
Features
(1)D-C Triggered from Active-High or Active-Low Gated Logic Inputs;
(2)Retriggerable for very long output pulses,up to 100% duty cycle;
(3)Overriding clear terminates output pulse;
(4)'122 and 'LS122 have internal timing resistors
Diagrams
<IMG border=0 src="http://www.seekic.com/uploadfile/ic-mfg/20127304218675.jpg">
| Image | Part No | Mfg | Description |  |
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 SN74LS123DR |
Texas Instruments |
Monostable Multivibrator Dual retrig monostbl multivibrators |
Data Sheet |
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SN74LS123DRE4 |
Texas Instruments |
Monostable Multivibrator Dual retrig monostbl multivibrators |
Data Sheet |
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SN74LS123DRG4 |
Texas Instruments |
Monostable Multivibrator Dual retrig monostbl multivibrators |
Data Sheet |
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