Dual Retriggerable Monostable Multivibrators

The AHC123A devices are dual retriggerable Monostable Multivibrators designed for 2-V to 5.5-V VCC operation.
These edge-triggered multivibrators feature output pulse-duration control by three methods. In the first method, the A input is low, and the B input goes high. In the second method, the B input is high, and the A input goes low. In the third method, the A input is low, the B input is high, and the clear (CLR) input goes high.
The output pulse duration is programmed by selecting external resistance and capacitance values. The external Timing capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor connected between Rext/Cext and VCC. To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and VCC. The output pulse duration also CAN be reduced by taking CLR low.
Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. The A, B, and CLR inputs have Schmitt Triggers with sufficient hysteresis to handle slow input transition rates with jitter-free triggering at the outputs.
Once triggered, the basic pulse duration CAN be extended by retriggering the gated low-level-active (A) or high-level-active (B) input. Pulse duration CAN be reduced by taking CLR low. CLR input CAN be used to override A or B inputs. The input/output Timing diagram illustrates pulse control by retriggering the inputs and early clearing.
The variance in output pulse duration from device to device typically is less than 0.5% for given external Timing components. An example of this distribution for the ?AHC123A is shown in Figure 10. Variations in output pulse duration versus supply voltage and temperature are shown in Figure 6.
During power up, Q outputs are in the low state, and Q outputs are in the high state. The outputs are glitch free, without applying a reset pulse.
For additional application information on multivibrators, see the application report Designing With the SN74AHC123A and SN74AHCT123A literature number SCLA014.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74AHC123ADGVRE4 Texas Instruments Dual Retriggerable Monostable Multivibrators 16-TVSOP -40 to 85
SN74AHC123AMDREP Texas Instruments Enhanced Product Dual Retriggerable Monostable Multivibrator 16-SOIC -55 to 125
SN74AHC123AMDREPG4 Texas Instruments Enhanced Product Dual Retriggerable Monostable Multivibrator 16-SOIC -55 to 125
SN74AHC123ADBR Texas Instruments Dual Retriggerable Monostable Multivibrators 16-SSOP -40 to 85
SN74AHC123ADRG4 Texas Instruments Dual Retriggerable Monostable Multivibrators 16-SOIC -40 to 85
SN74AHC123AN Texas Instruments Dual Retriggerable Monostable Multivibrators 16-PDIP -40 to 85
SN74AHC123AD Texas Instruments Dual Retriggerable Monostable Multivibrators 16-SOIC -40 to 85
SN74AHC123ADRE4 Texas Instruments Dual Retriggerable Monostable Multivibrators 16-SOIC -40 to 85
SN74AHC123ADR Texas Instruments Dual Retriggerable Monostable Multivibrators 16-SOIC -40 to 85
SN74AHC123ADG4 Texas Instruments Dual Retriggerable Monostable Multivibrators 16-SOIC -40 to 85
SN74AHC123A 's PackagesSN74AHC123A 's pdf datasheet
SN74AHC123AD SOIC
SN74AHC123ADBR SSOP
SN74AHC123ADBRE4 SSOP
SN74AHC123ADBRG4 SSOP
SN74AHC123ADE4 SOIC
SN74AHC123ADG4 SOIC
SN74AHC123ADGVR TVSOP
SN74AHC123ADGVRE4 TVSOP
SN74AHC123ADGVRG4 TVSOP
SN74AHC123ADR SOIC
SN74AHC123ADRE4 SOIC
SN74AHC123ADRG4 SOIC
SN74AHC123AN PDIP
SN74AHC123ANE4 PDIP
SN74AHC123APWR TSSOP
SN74AHC123APWRE4 TSSOP
SN74AHC123APWRG4 TSSOP




SN74AHC123A Pinout, Pinouts
SN74AHC123A pinout,Pin out
This is one package pinout of SN74AHC123A,If you need more pinouts please download SN74AHC123A's pdf datasheet.

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