CD74HC123NSRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74HC123NSRG4 is a dual retriggerable monostable multivibrator with complementary outputs and 2 trigger inputs per channel. Pulse width is set by an external RC network in a 16-pin SOP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC123NSRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual retriggerable monostable multivibrator allowing pulse extension when re-triggered before timeout
- Complementary Q and Q-bar outputs per channel for direct connection to both active-high and active-low logic
- 16-pin SOP package with 2 independent channels, each with separate R/C timing pins for flexible pulse-width configuration
Applications
The CD74HC123NSRG4 is used in digital timing circuits requiring fixed-duration pulse generation, such as debounce filters for mechanical switches, watchdog timeout generators, and missing-pulse detectors in industrial control systems. Its retriggerable architecture enables pulse-width extension in motion control and communication systems where signal conditioning with adjustable one-shot timing is needed.
Specifications
| YTEOL | 0 |
| Additional Feature | RETRIGGERABLE |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Logic IC Type | MONOSTABLE MULTIVIBRATOR |
| Number of Data/Clock Inputs | 2 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Propagation Delay (tpd) | 480ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HC123NSRG4:
Frequently Asked Questions
How does the retriggerable feature of CD74HC123NSRG4 extend pulse width in a debounce circuit?
With CD74HC123NSRG4's retriggerable design, each new trigger pulse before the RC timeout resets the timing cycle, extending the output pulse duration. For a mechanical switch debounce application, a 10 ms RC time constant can be re-triggered on every contact bounce, holding the output high until 10 ms after the last bounce.
What output configuration does CD74HC123NSRG4 provide, and how does it simplify interfacing with mixed logic?
Each of the 2 channels in CD74HC123NSRG4 provides complementary Q and Q-bar outputs, delivering both active-high and active-low pulses simultaneously. This eliminates the need for external inverter gates when driving both polarities in a system, reducing component count in a 5 V or 3.3 V HC-family logic design.
How is the output pulse width of CD74HC123NSRG4 determined, and what component values are typically used?
The output pulse width of CD74HC123NSRG4 is set by an external resistor and capacitor connected to the timing pins of each channel. Typical values range from a few kilohms with picofarad capacitors for short nanosecond-to-microsecond pulses, to megaohm resistors with microfarad capacitors for millisecond-range one-shot outputs.
In what package does CD74HC123NSRG4 ship, and what does the NSR suffix indicate for procurement?
CD74HC123NSRG4 is housed in a 16-pin SOP (Small Outline Package). The NSR suffix indicates a tape-and-reel packaging format on small reel, suitable for automated SMT pick-and-place assembly in production environments, and the G4 suffix confirms RoHS-compliant lead-free construction.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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