CD74HC123EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The CD74HC123EE4 is a dual retriggerable monostable multivibrator in the HC CMOS logic family, operating from 2 V to 6 V with 5.2 mA output current and 50 pF load capacitance, housed in a 16-pin PDIP package for through-hole breadboard prototyping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC123EE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3164(MOQ 1000)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC123EE4?
- Dual independent monostable channels with retriggerable inputs allow continuous pulse-width extension without glitch when input pulse train arrives before timeout
- Wide 2 V to 6 V supply range with HC-family CMOS process delivers sub-10 ns propagation delay and 5.2 mA output current drive for 50 pF bus loads
- 16-pin PDIP through-hole package is ideal for rapid prototyping and lab evaluation without SMD soldering equipment
What is CD74HC123EE4 used for?
The CD74HC123EE4 is used in digital timing circuits, debounce networks, and pulse-stretching stages where a clean, fixed-duration output pulse must be generated from a noisy or irregularly spaced input signal. Its dual retriggerable architecture supports back-to-back pulse generation in microcontroller watchdog reset circuits and power-sequencing logic operating from 2 V to 6 V over -55°C to +125°C.
What are the specifications of CD74HC123EE4?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | RETRIGGERABLE |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MONOSTABLE MULTIVIBRATOR |
| Max I(ol) | 0.0052A |
| Number of Bits | 2 |
| Number of Data/Clock Inputs | 2 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| 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 | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia, Mexico |
Where can I find the CD74HC123EE4 datasheet?
CD74HC123EE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC123EE4?
Compatible alternatives and drop-in replacements for CD74HC123EE4:
Frequently Asked Questions
What makes CD74HC123EE4 retriggerable, and when does this matter in a timer circuit?
A retriggerable monostable restarts its timing period each time a valid trigger edge arrives before the previous timeout expires. In the CD74HC123EE4, this means that a continuous input pulse train at any rate above 1/T_pulse keeps the output high indefinitely, which is critical for watchdog circuits and motor run-on timers where the output must stay asserted as long as activity is detected within a set window defined by an external RC network.
How is the output pulse width set on CD74HC123EE4 and what component range is practical?
Pulse width is set by an external resistor (R_ext) and capacitor (C_ext) connected to the timing pins, with T_w = 0.28 × R_ext × C_ext. Practical values range from nanoseconds with small pF capacitors to tens of milliseconds with 100 kΩ resistors and 1 µF capacitors, covering debounce windows of 1 ms to 20 ms common in mechanical switch conditioning applications.
Can CD74HC123EE4 drive a 3.3 V CMOS logic input from a 5 V supply without a level translator?
The CD74HC123EE4 output voltage swing at 5 V supply is V_OH ≥ 4.4 V and V_OL ≤ 0.1 V. A 3.3 V CMOS input typically accepts V_IH ≥ 2.0 V, so a simple resistor divider or Schottky clamp limits the 5 V HC output to 3.3 V levels, avoiding a dedicated logic translator IC for cost-sensitive through-hole prototype boards.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1000+ | $0.5070 | $507.00 |
| 1375+ | $0.3164 | $435.09 |
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