CD74HCT4538M96E4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD74HCT4538M96E4 is a dual retriggerable precision monostable multivibrator in the high-speed CMOS HCT logic family from Texas Instruments. It provides 2 independent one-shot channels with complementary outputs in a 16-pin SOIC package, operating from a 5 V TTL-compatible supply. Stocked globally and available for worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT4538M96E4 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
What are the key features of CD74HCT4538M96E4?
- Dual independent retriggerable monostable channels with complementary Q and Q-bar outputs allow flexible pulse-width generation and debounce circuits in a single 16-pin SOIC package
- High-speed CMOS HCT family ensures TTL-compatible input thresholds at 5 V supply, enabling direct interfacing with legacy TTL logic without level-shifting components
- Precision one-shot timing set by a single external RC network per channel, with a stable pulse width over the -55°C to +125°C temperature range for reliable industrial timing applications
What is CD74HCT4538M96E4 used for?
CD74HCT4538M96E4 is commonly used in digital timing circuits to generate precise single-shot pulses for debouncing mechanical switches, where the RC-programmable pulse width suppresses contact bounce on inputs lasting under a few milliseconds. It is also employed in microprocessor reset and power-on sequencing circuits, ensuring a clean reset pulse of defined width even when power ramp rates vary. Industrial PLC and control boards use this device to convert asynchronous trigger events into fixed-duration control pulses compatible with 5 V TTL backplane logic.
What are the specifications of CD74HCT4538M96E4?
| YTEOL | 0 |
| Family | HCT |
| 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,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Propagation Delay (tpd) | 83ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 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 |
Where can I find the CD74HCT4538M96E4 datasheet?
CD74HCT4538M96E4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HCT4538M96E4?
Compatible alternatives and drop-in replacements for CD74HCT4538M96E4:
Frequently Asked Questions
How is the output pulse width programmed on CD74HCT4538M96E4, and what range of timing is achievable?
The output pulse width of each channel in CD74HCT4538M96E4 is set by a single external resistor and capacitor connected to the REXT and CEXT pins, following the formula t = K × R × C. Depending on component selection, pulse widths from under 1 µs to several seconds are achievable, giving designers flexibility for applications ranging from high-frequency edge detection at 10 MHz to slow debounce pulses of 50 ms or more.
What supply voltage does CD74HCT4538M96E4 require, and is it compatible with 3.3 V logic systems?
CD74HCT4538M96E4 operates from a 5 V supply with TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). While its output swings to the full 5 V rail, it can accept input signals from 3.3 V systems without additional level-shifting since the HCT input thresholds are below the 3.3 V logic high level, making it practical in mixed-voltage board designs.
How does the retriggerable feature of CD74HCT4538M96E4 differ from a non-retriggerable one-shot in a switch debounce circuit?
In a retriggerable monostable, each new input edge restarts the timing period from zero, so if switch bounce produces multiple pulses within the programmed RC time window, the output pulse extends continuously until the bouncing stops and one full RC period elapses. A 10 ms debounce window set by the RC network ensures the output remains stable for exactly 10 ms after the last bounce pulse, preventing false triggers in downstream digital logic regardless of how long the mechanical contact chatters.
For a high-volume industrial design, what are the procurement and package advantages of CD74HCT4538M96E4?
CD74HCT4538M96E4 is available in a 16-pin SOIC package (SOP16, 0.25-inch body, 1.27 mm pitch) supplied on 96-unit tape-and-reel reels, which is ideal for automated SMT assembly lines. The E4 suffix confirms the device meets RoHS (JESD-609 e4) environmental compliance, and the HCT family's long-established production history ensures multi-source availability and price stability for high-volume industrial procurement over multi-year production runs.
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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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