74HCT123PW,118 - Brand New NXP Semiconductors Multivibrators
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Description
The 74HCT123PW,118 is a high-speed Si-gate CMOS dual retriggerable monostable multivibrator. It is pin compatible with Low-power Schottky TTL (LSTTL) and is specified in compliance with JEDEC standard no. 7A. The device has output pulse width control by three methods. The basic pulse width is programmed by selection of an external resistor (REXT) and capacitor (CEXT). Once triggered, the output pulse width can be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). The output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired by repeating this process. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD, which also inhibits the triggering. The device also has an internal connection from nRD to the input gates, allowing it to be triggered by a HIGH-going signal at input nRD as shown in the function table. The 74HCT123PW,118 is identical to the 74HC423; 74HCT423 but can be triggered via the reset input. It features DC triggering from active HIGH or active LOW inputs, retriggerability for very long pulses up to 100% duty factor, direct reset to terminate the output pulse, and Schmitt-trigger action on all inputs except for the reset input. It also has ESD protection and is specified for a temperature range of -40 °C to +85 °C and -40 °C to +125 °C.
Specifications and features
- High-speed Si-gate CMOS device
- Dual retriggerable monostable multivibrator
- Pin compatible with Low-power Schottky TTL (LSTTL)
- Output pulse width control by external resistor and capacitor
- Retriggerable by gated active LOW-going edge input or active HIGH-going edge input
- Output pulse period can be extended as desired
- Output delay can be terminated by LOW-going edge on input nRD
- Can be triggered by HIGH-going signal at input nRD
- Identical to 74HC423; 74HCT423 but can be triggered via reset input
- DC triggered from active HIGH or active LOW inputs
- Retriggerable for very long pulses up to 100% duty factor
- Direct reset terminates output pulse
- Schmitt-trigger action on all inputs except for reset input
- ESD protection
- Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Application Scenarios
- Multivibrators
Comparison
Advantages- High-speed operation
- Retriggerable for versatile pulse width control
- Direct reset for easy termination of output pulse
- Schmitt-trigger action for tolerance to slower input rise and fall times
- ESD protection for reliable operation
- Wide temperature range for various environmental conditions
Disadvantages- None identified
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Datasheet
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- Datasheet: Download 74HCT123PW,118
- Chipdatas Part: CD93-74HCT123PW,118
- Warehouse: China, Hong Kong
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- Last Updated: 2024/06/03 14:48 +0800
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