CD74HC4538PW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD74HC4538PW is a dual retriggerable precision monostable multivibrator IC from Texas Instruments in the HC/UH CMOS family, featuring two independent one-shot circuits with separate trigger inputs in a 16-pin SOIC package. It operates with 50 pF load capacitance and 5.2 mA output sink current across a 2V to 6V supply range. Available from stock with competitive pricing and worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC4538PW 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 with two independent one-shot circuits and separate clock/data inputs, enabling precise pulse width generation without external flip-flop logic
- Retriggerable design allows input pulses to reset the timing cycle mid-period, ensuring continuous output during repetitive input events in motor control and timing circuits
- HC/UH CMOS family in a compact 16-pin SOIC (R-PDSO-G16) package with wide 2V to 6V supply range for flexible integration in 3.3V and 5V digital systems
Applications
The CD74HC4538PW is used in pulse-width generation and timing circuits where a precisely controlled output pulse duration is required regardless of input pulse width, such as debouncing switches, generating reset pulses, and one-shot timers in microcontroller-based systems. Its retriggerable feature makes it well-suited for watchdog timer circuits and motor control sequencing where continuous triggers must maintain output state. The dual independent multivibrators allow two separate timing channels in a single package, reducing BOM count in industrial control and communications equipment.
Specifications
| YTEOL | 0 |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G16 |
| 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 | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Propagation Delay (tpd) | 375ns |
| 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 (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HC4538PW:
Frequently Asked Questions
What does retriggerable mean for the CD74HC4538PW?
Retriggerable means that if a new trigger pulse arrives before the current timing cycle completes, the CD74HC4538PW resets and restarts its output pulse, allowing continuous output high state during repeated trigger events without the output going low between pulses.
How many independent monostable circuits does the CD74HC4538PW contain?
The CD74HC4538PW contains two independent retriggerable monostable multivibrators (Number of Functions: 2), each with its own trigger inputs and timing components, allowing two separate one-shot timing functions in a single 16-pin SOIC package.
What supply voltage does the CD74HC4538PW operate at?
The CD74HC4538PW operates over a supply voltage range of 2V to 6V, making it compatible with both 3.3V and 5V logic systems and suitable for use alongside a wide variety of CMOS and TTL-compatible microcontrollers and processors.
What are typical applications for the CD74HC4538PW?
The CD74HC4538PW is used for switch debouncing, one-shot pulse generation, watchdog timers, motor drive sequencing, and reset pulse generation in embedded systems. Its dual retriggerable design is especially useful in applications requiring continuous timing output during periodic input events.
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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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