TL431CPE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The TL431CPE4 is an adjustable precision shunt voltage reference from Texas Instruments with an output voltage programmable from 2.495 V to 36 V at 2% initial accuracy and up to 100 mA output current in an 8-pin PDIP package. It provides a stable two-terminal reference for error amplifiers in power supplies, replacing traditional Zener diodes with superior temperature stability and accuracy. Available from stock with competitive pricing and worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TL431CPE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TL431CPE4?
- Wide adjustable output range from 2.495 V to 36 V via two external resistors covers nearly all common reference voltage needs in a single part number
- 2% initial accuracy with low temperature coefficient provides a stable, precise reference that outperforms standard Zener diodes in regulated power supply feedback loops
- 100 mA maximum sink current enables direct use as an error amplifier output stage in flyback and boost converter optocoupler feedback circuits
What is TL431CPE4 used for?
The TL431CPE4 is one of the most widely used shunt voltage references in power supply feedback control, serving as the error amplifier reference in flyback converters, buck-boost regulators, and linear power supplies. Its adjustable output and high sink current make it ideal for isolated power supply designs where it drives an optocoupler to regulate the primary-side controller. The device is also used in battery charger voltage monitoring, overvoltage protection circuits, and precision voltage limiting applications in industrial and consumer electronics.
What are the specifications of TL431CPE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | OUTPUT VOLTAGE ADJUSTABLE FROM 2.495V TO 36V |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.1A |
| Output Voltage-Max | 2.55V |
| Output Voltage-Min | 2.44V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 143.143ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trim/Adjustable Output | YES |
| Voltage Tolerance-Max | 2% |
| ## TL431CPE4 Alternates Showing results | Image |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mexico |
Where can I find the TL431CPE4 datasheet?
TL431CPE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TL431CPE4?
Compatible alternatives and drop-in replacements for TL431CPE4:
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDIP8
suggested
Frequently Asked Questions
What is the output voltage range of the TL431CPE4?
The TL431CPE4 has an adjustable output voltage range from 2.495 V (the internal reference voltage) up to 36 V, set by an external resistor divider connected to the reference (REF) pin, allowing it to serve as a precision reference across a wide range of applications.
What is the accuracy and temperature stability of the TL431CPE4?
The TL431CPE4 provides 2% initial accuracy on its internal 2.495 V reference voltage, with a low temperature coefficient that ensures the reference remains stable over the operating temperature range, making it significantly more accurate than conventional Zener diodes.
Can the TL431CPE4 be used in isolated switching power supply feedback circuits?
Yes, the TL431CPE4 is widely used in isolated flyback and forward converter feedback loops, where it monitors the output voltage and drives an optocoupler to regulate the primary-side PWM controller, providing tight output voltage regulation with up to 100 mA sink current.
What package does the TL431CPE4 come in and is it lead-free?
The TL431CPE4 is housed in an 8-pin Plastic Dual In-Line Package (PDIP, JESD-30 code R-PDIP-T8). The 'E4' suffix and Pb-free code confirm it is lead-free, halogen-free (JESD-609 e4), and RoHS-compliant for use in environmentally regulated products.
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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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