Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | CD74HCT123ME4 | 74HCT123 Series |
|---|---|---|
| Current - Output High, Low | 4 mA, 4 mA | 4 mA |
| Independent Circuits | 2 | 2 |
| Logic Type | Monostable | Monostable |
| Mounting Type | Surface Mount | Through Hole, Surface Mount |
| Operating Temperature [Max] | 125 °C | 125 °C |
| Operating Temperature [Min] | -55 °C | -55 °C |
| Package / Case | 16-SOIC | 16-DIP, 16-SOIC |
| Package / Case | 3.9 mm Width, 0.154 in | 0.154 - 7.62 in |
| Propagation Delay | 25 ns | 25 ns |
| Schmitt Trigger Input | False | False |
| Supplier Device Package | 16-SOIC | 16-PDIP, 16-SOIC |
| Voltage - Supply [Max] | 5.5 V | 5.5 V |
| Voltage - Supply [Min] | 4.5 V | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
74HCT123 Series
High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Reset
| Part | Independent Circuits | Voltage - Supply [Max] | Voltage - Supply [Min] | Mounting Type | Logic Type | Schmitt Trigger Input | Supplier Device Package | Operating Temperature [Min] | Operating Temperature [Max] | Current - Output High, Low | Propagation Delay | Package / Case | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments CD74HCT123EThe ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of Rx and CXprovides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the A\ and B inputs occur at a particular voltage level and is not related to the rise and fall times of the trigger pulses.
Once triggered, the output pulse width may be extended by retriggering inputs A\ and B. The output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing edge triggering (A)\ and leading edge triggering (B) inputs are provided for triggering from either edge of the input pulse. If either Mono is not used each input on the unused device (A\, B, and R\) must be terminated high or low.
The minimum value of external resistance, Rx is typically 5k. The minimum value external capacitance, CX, is 0pF. The calculation for the pulse width is tW= 0.45 RXCXat VCC= 5V.
The ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of Rx and CXprovides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the A\ and B inputs occur at a particular voltage level and is not related to the rise and fall times of the trigger pulses.
Once triggered, the output pulse width may be extended by retriggering inputs A\ and B. The output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing edge triggering (A)\ and leading edge triggering (B) inputs are provided for triggering from either edge of the input pulse. If either Mono is not used each input on the unused device (A\, B, and R\) must be terminated high or low.
The minimum value of external resistance, Rx is typically 5k. The minimum value external capacitance, CX, is 0pF. The calculation for the pulse width is tW= 0.45 RXCXat VCC= 5V. | 2 | 5.5 V | 4.5 V | Through Hole | Monostable | 16-PDIP | -55 °C | 125 °C | 4 mA, 4 mA | 25 ns | 0.3 in, 7.62 mm | 16-DIP | |
Texas Instruments CD74HCT123MTThe ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of Rx and CXprovides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the A\ and B inputs occur at a particular voltage level and is not related to the rise and fall times of the trigger pulses.
Once triggered, the output pulse width may be extended by retriggering inputs A\ and B. The output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing edge triggering (A)\ and leading edge triggering (B) inputs are provided for triggering from either edge of the input pulse. If either Mono is not used each input on the unused device (A\, B, and R\) must be terminated high or low.
The minimum value of external resistance, Rx is typically 5k. The minimum value external capacitance, CX, is 0pF. The calculation for the pulse width is tW= 0.45 RXCXat VCC= 5V.
The ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of Rx and CXprovides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the A\ and B inputs occur at a particular voltage level and is not related to the rise and fall times of the trigger pulses.
Once triggered, the output pulse width may be extended by retriggering inputs A\ and B. The output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing edge triggering (A)\ and leading edge triggering (B) inputs are provided for triggering from either edge of the input pulse. If either Mono is not used each input on the unused device (A\, B, and R\) must be terminated high or low.
The minimum value of external resistance, Rx is typically 5k. The minimum value external capacitance, CX, is 0pF. The calculation for the pulse width is tW= 0.45 RXCXat VCC= 5V. | 2 | 5.5 V | 4.5 V | Surface Mount | Monostable | 16-SOIC | -55 °C | 125 °C | 4 mA, 4 mA | 25 ns | 0.154 in, 3.9 mm Width | 16-SOIC | |
2 | 5.5 V | 4.5 V | Surface Mount | Monostable | 16-SOIC | -55 °C | 125 °C | 4 mA, 4 mA | 25 ns | 0.154 in, 3.9 mm Width | 16-SOIC | ||
2 | 5.5 V | 4.5 V | Surface Mount | Monostable | 16-SOIC | -55 °C | 125 °C | 4 mA, 4 mA | 25 ns | 0.154 in, 3.9 mm Width | 16-SOIC |
Description
General part information
74HCT123 Series
The ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of Rx and CXprovides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the A\ and B inputs occur at a particular voltage level and is not related to the rise and fall times of the trigger pulses.
Once triggered, the output pulse width may be extended by retriggering inputs A\ and B. The output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing edge triggering (A)\ and leading edge triggering (B) inputs are provided for triggering from either edge of the input pulse. If either Mono is not used each input on the unused device (A\, B, and R\) must be terminated high or low.
The minimum value of external resistance, Rx is typically 5k. The minimum value external capacitance, CX, is 0pF. The calculation for the pulse width is tW= 0.45 RXCXat VCC= 5V.