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CDIP (J)
Integrated Circuits (ICs)

CD54HC123F

Active
Texas Instruments

HIGH SPEED CMOS LOGIC DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS WITH RESETS

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Search across all available documentation for this part.

DocumentsSN54/74HCT CMOS Logic Family Applications and RestrictionsUsing High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc+13
CDIP (J)
Integrated Circuits (ICs)

CD54HC123F

Active
Texas Instruments

HIGH SPEED CMOS LOGIC DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS WITH RESETS

Deep-Dive with AI

DocumentsSN54/74HCT CMOS Logic Family Applications and RestrictionsUsing High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc+13

Technical Specifications

Parameters and characteristics for this part

SpecificationCD54HC123F
Current - Output High, Low [custom]5.2 mA
Current - Output High, Low [custom]5.2 mA
Independent Circuits2
Logic TypeMonostable
Mounting TypeThrough Hole
Operating Temperature [Max]125 °C
Operating Temperature [Min]-55 °C
Package / Case7.62 mm, 0.3 in
Package / Case16-CDIP
Propagation Delay54 ns
Schmitt Trigger InputTrue
Supplier Device Package16-CDIP
Voltage - Supply [Max]6 V
Voltage - Supply [Min]2 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
Texas InstrumentsTUBE 1$ 15.01
100$ 13.11
250$ 10.11
1000$ 9.04

Description

General part information

CD54HC123 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.