RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
小火锅底料The dc triggered multivibrators feature pul width control by three meth-ods. The basic pul width is programmed by lection of external resistance and capacitance values. The LS122 has an internal timing resistor that allows the circuits to be ud with only an external capacitor. Once triggered, the ba-sic pul width may be extended by retriggering the gated low-level-active (A)or high-level-active (B) inputs, or be reduced by u of the overriding clear.
•Overriding Clear Terminates Output Pul
青春无悔演讲稿•Compensated for V CC and T emperature Variations
•DC Triggered from Active-High or Active-Low Gated Logic Inputs •Retriggerable for Very Long Output Puls, up to 100% Duty Cycle •Internal Timing Resistors on LS122
SN54/74LS122 (TOP VIEW)(SEE NOTES 1 THRU 4)
SN54/74LS123 (TOP VIEW)(SEE NOTES 1 THRU 4)
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负号NOTES:
1.An external timing capacitor may be connected between C ext and R ext /C ext (positive).
2.To u the internal timing resistor of the LS122, connect R int to V CC .
3.For improved pul width accuracy connect an external resistor between R ext /C ext and V CC with R int open-circuited.
4.To obtain variable pul widths, connect an external variable resistance between R int /C ext and V CC .
R ext/C
R ext/C ext 11ĂR
ext/2CLR
C ext乐观心态的小故事
NC Ċ NO INTERNAL CONNECTION.清楚的拼音>笑怎么组词
藏红花的功效与作用
