Catalog(3 parts)
| Part | Independent Circuits▲▼ | Supplier Device Package | Propagation Delay▲▼ | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Current - Output High, Low▲▼ | Current - Output High, Low▲▼ | Package / Case | Package / Case▲▼ | Mounting Type | Operating Temperature▲▼ | Operating Temperature▲▼ | Schmitt Trigger Input▲▼ | Logic Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2 ul | 16-SOIC | 2.8000000540373552e-8 s | 4.75 V | 5.25 V | 0.00800000037997961 A | 0.00039999998989515007 A | 16-SOIC | 0.003911599982529879 m, 3.900000095367432 ul | Surface Mount | 70 °C | 0 °C | Monostable | ||
2 ul | 16-PDIP | 2.8000000540373552e-8 s | 4.75 V | 5.25 V | 0.00800000037997961 A | 0.00039999998989515007 A | 16-DIP | 0.007619999814778566 m, 0.007619999814778566 m | Through Hole | 70 °C | 0 °C | Monostable | ||
2 ul | 16-SOIC | 2.8000000540373552e-8 s | 4.75 V | 5.25 V | 0.00800000037997961 A | 0.00039999998989515007 A | 16-SOIC | 0.003911599982529879 m, 3.900000095367432 ul | Surface Mount | 70 °C | 0 °C | Monostable |
Key Features
• Will Not Trigger from ClearD-C Triggered from Active-High or Active-Low Gated Logic InputsRetriggerable for Very Long Output Pulses, Up to 100% Duty CycleOverriding Clear Terminates Output Pulse'LS422 Has Internal Timing ResistorAn external timing capacitor may be connected between Cextand Rext/Cext(positive).To use the internal timing resistor of 'LS422, connect Rintto VCC.For improved pulse width accuracy and repeatability, connect an external resistor between Rext/Cextand VCCwith Rintopen-circuited.To obtain variable pulse widths, connect an external variable resistance between Rintor Rext/Cextand VCC.Will Not Trigger from ClearD-C Triggered from Active-High or Active-Low Gated Logic InputsRetriggerable for Very Long Output Pulses, Up to 100% Duty CycleOverriding Clear Terminates Output Pulse'LS422 Has Internal Timing ResistorAn external timing capacitor may be connected between Cextand Rext/Cext(positive).To use the internal timing resistor of 'LS422, connect Rintto VCC.For improved pulse width accuracy and repeatability, connect an external resistor between Rext/Cextand VCCwith Rintopen-circuited.To obtain variable pulse widths, connect an external variable resistance between Rintor Rext/Cextand VCC.
Description
AI
The 'LS422 and 'LS423 are identical to 'LS122 and 'LS123 except they cannot be triggered via clear.
These d-c triggered multivibrators feature output-pulse-width control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The 'LS422 contains an internal timing resistor that allows the circuits to be used with only an external capacitor, if so desired. 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. Figure 1 illustrates pulse control by retriggering and early clear.
The 'LS422 and 'LS423 have enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 millivolt per nanosecond. The 'LS422 Rintis nominally 10 k ohms.
The SN54LS422 and SN54LS423 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LS422 and SN74LS423 are characterized for operation from 0°C to 70°C.FIGURE 1-TYPICAL INPUT/OUTPUT PULSES
The 'LS422 and 'LS423 are identical to 'LS122 and 'LS123 except they cannot be triggered via clear.
These d-c triggered multivibrators feature output-pulse-width control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The 'LS422 contains an internal timing resistor that allows the circuits to be used with only an external capacitor, if so desired. 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. Figure 1 illustrates pulse control by retriggering and early clear.
The 'LS422 and 'LS423 have enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 millivolt per nanosecond. The 'LS422 Rintis nominally 10 k ohms.
The SN54LS422 and SN54LS423 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LS422 and SN74LS423 are characterized for operation from 0°C to 70°C.FIGURE 1-TYPICAL INPUT/OUTPUT PULSES