HD74LS122

The HD74LS122 is designed as retriggerable monostable multivibrators (with clear). This d-c triggered multivibrator features output pulse width control by three method. The basic pulse time is programmed by selection of external resistance and capacitance values. HD74LS122 has internal timing resistor that allows the circuit to be used with only an external capacitor, if so desired.

Some recommended operating conditions of HD74LS122 have been concluded into several points as follow. The first one is about its input pulse width which would be min 40ns. The second one is about its external timing resistance which would be min 5K and max 260K. The third one is about its wiring capacitance at rext.cext terminal which would be max 50pF.

Some electrical characteristics about HD74LS122. The first one is about its input voltage which would be min 2.0V for high level and would be max 0.8V for low level. The second one is about its output voltage which would be min 2.7V for high level and would be max 0.5V for low level. The third one is about its input current which would be max 20uA for high level and would be max -0.4mA for low level and would be max 0.1mA for Vi=7V. The fourth one is about its short circuit output current which would be min -20mA and max -100mA. The fifth one is about its supply current which would be typ 6mA and max 11mA. The sixth one is about its input clamp voltage which would be max -1.5V.

Also some switching characteristics about HD74LS122. The first one is about its tPLH which would be typ 23ns and would be max 33ns with inputs A. The second one is about its tPHL which would be typ 32ns and would be max 45ns with inputs A. The third one is about its tPLH which would be typ 23ns and max 44ns for inputs B. The fourth one is about its tPHL which would be typ 34ns and max 56ns with inputs B. And so on. For more information of HD74LS122,  please contact us.