SN54LS423

The SN54LS423 is designed as one kind of retriggerable monostable multivibrators. This DC triggered multivibrator features output pulse width control by three mothods. The basic pulse time of SN54LS423 is programmed by selection of external resistance and capacitance values.

SN54LS423 has four features. (1)Will not trigger from clear. (2)DC triggered from active high or active low gated logic inputs. (3)Retriggerable for very long output pulses, up to 100% duty cycle. (4)Overriding clear terminates output pulse. Those are all the main features.

Some recommended operating conditions of SN54LS423 have been concluded into several points as follow. (1)Its supply voltage would be min 4.5V and typ 5V and max 5.5V. (2)Its high level output current would be max -400uA. (3)Its low level output current would be max 4mA. (4)Its pulse width would be min 40ns. (5)Its external timing resistance would be min 5kohms and max 180kohms. (6)Its wiring capacitance at Rext/Cext terminal would be max 50pF. (7)Its operating free-air temperature range would be from -55°C to 125°C. Those are all the main recommended operating conditions.

Also some electrical characteristics of SN54LS423 are concluded as follow. (1)Its high level input voltage would be min 2V. (2)Its low level input voltage would be max 0.7V. (3)Its input clamp voltage would be max -1.5V. (4)Its high level output voltage would be min 2.5V and typ 3.5V. (5)Its low level output voltage would be typ 0.25V and max 0.4V. (6)Its input current at maximum input voltage would be max 0.1mA. (7)Its high level input current would be max 20uA. (8)Its low level input current would be max -0.4mA. (9)Its short circuit output current would be min -20mA and max -100mA. (10)Its supply current would be typ 12mA and max 20mA. And so on. If you have any question or suggestion or want to konw more information about SN54LS423 please contact us for more details. Thank you!