SN74LS122

The SN74LS122 is designed as DC triggered multivibrator which features pulse width control by three methods. The basic pulse width is programmed by selection of external resistance and capacitance values. It has an internal timing resistor that allows the circuits to be used with only an external capacitor. Once triggered, the basic pulse width 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.

SN74LS122 has five features. (1)Overriding clear terminates output pulse. (2)Compensated for Vcc and temperature variations. (3)DC triggered from active-high or active-low gated logic inputs. (4)Retriggerable for very long output pulses, up to 100% duty cycle. (5)Internal timing resistors. Those are all the main features.

Some SN74LS122 aguaranteed operating ranges have been concluded into several points as follow. (1)Its supply voltage would be min 4.75V and typ 5V and max 5.25V. (2)Its operatig ambient temperature range would be min 0°C and typ 25°C and max 70°C. (3)Its output current high would be max -0.4mA. (4)Its output current low would be max 8.0mA. (5)Its external timing resistance would be min 5.0k and max 260k. (6)Its wiring capacitance at Rext/Cext terminal would be max 50pF. And so on.

Also some SN74LS122 DC electrical characteristics are concluded as follow. (1)Its input high level voltage would be min 2.0V. (2)Its input low level voltage would be max 0.8V. (3)Its input clamp diode voltage would be typ -0.65V and max -1.5V. (4)Its output high voltage would be min 2.7V and typ 3.5V. (5)Its output low level voltage would be typ 0.25V and max 0.4V at Iol=4.0mA and would be typ 0.35V and max 0.5V at Iol=8.0mA. (6)Its short circuit current would be min -20mA and max -100mA. And so on. If you have any question or suggestion or want to know more information about SN74LS122, please contact us for details. Thank you!