UC2543J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The UC2543J is a single-channel voltage supervisor and reset IC from Texas Instruments with fixed (non-adjustable) thresholds, housed in a 16-pin ceramic glass-sealed DIP package. It monitors system supply voltages and generates a reset signal to microprocessors and digital systems when voltage falls below the threshold. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- UC2543J Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -25.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Single-channel voltage supervisor with fixed threshold (non-adjustable) for reliable, consistent power-on reset and brownout detection without external threshold components
- Ceramic glass-sealed DIP-16 package (JESD-30 R-GDIP-T16) providing hermetic protection against moisture and contaminants for high-reliability military, aerospace, and industrial applications
- Voltage supervisor function generates clean reset pulses to microprocessors and digital logic on power-up and during voltage brownout conditions, preventing erratic system behavior
- RoHS-compliant Pb-free construction (JESD-609 e0) in a through-hole ceramic package compatible with socketed high-reliability board assemblies
Applications
The UC2543J is designed for power supply monitoring and microprocessor reset generation in high-reliability embedded systems, military electronics, avionics, and aerospace equipment where ceramic package hermeticity and long-term reliability are mandatory. It is also used in industrial control systems and ruggedized instrumentation requiring guaranteed reset behavior during power cycling and supply brownout events. The fixed threshold architecture simplifies design and ensures repeatable reset performance without calibration across the production lifetime of the equipment.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 15mA |
| Supply Voltage-Max (Vsup) | 40V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 10V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | OTHER |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.5V |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC2543J:
Frequently Asked Questions
What does the UC2543J do and when is it used?
The UC2543J is a voltage supervisor and reset IC that monitors the system power supply and asserts a reset output signal when the supply voltage falls below a fixed threshold. It is used to hold microprocessors and digital logic in reset during power-up, power-down, and brownout conditions, preventing unpredictable behavior caused by insufficient supply voltage.
Why does the UC2543J use a ceramic package instead of a plastic package?
The UC2543J uses a ceramic glass-sealed DIP-16 package (JESD-30 R-GDIP-T16) because ceramic packages provide hermetic sealing against moisture, gases, and contaminants. This makes them mandatory in military, aerospace, and industrial applications where devices must survive harsh environments, extended temperature ranges, and decades of operation without degradation.
Is the voltage threshold in the UC2543J adjustable?
No, the UC2543J has fixed (non-adjustable) voltage thresholds. While this limits flexibility, it ensures consistent and repeatable reset behavior across all production units without requiring external resistors or individual calibration. This characteristic is especially valued in high-reliability applications where component variation must be minimized.
What package and pinout does the UC2543J use?
The UC2543J uses a 16-pin ceramic DIP (Dual In-Line Package) with glass sealing and a 0.3-inch lead spacing (package equivalence code DIP16,.3), identified by JEDEC code R-GDIP-T16. It is a through-hole package, compatible with IC sockets commonly used in high-reliability and serviceability-conscious designs.
What are typical applications for the UC2543J?
Typical applications include power-on reset generation for microprocessors and DSPs, supply voltage brownout detection in embedded controllers, watchdog timer supervision in industrial PLCs, and system reset management in military avionics, space electronics, medical instrumentation, and ruggedized computing systems requiring ceramic package reliability.
Related Guides
TPS61291DRVR Selection Guide: Low-Quiescent-Current Boost Converters for IoT and Wearables
How to select the TPS61291DRVR and low-Iq boost converters for IoT, wearables, and coin-cell designs. Compares specs, packages, and alternatives from TI, ADI, and Microchip.
May 13, 2026
TMS5704357BZWTQQ1 Selection Guide: Choosing the Right TMS570 Automotive MCU Variant
Compare TMS570 automotive MCU variants by ASIL level, flash, package, and peripherals. Find the right fit from entry-level LQFP to the ASIL-D TMS5704357BZWTQQ1.
May 13, 2026
TI Hercules TMS5704357BZWTQQ1 Design Guide for Automotive ASIL-D and Industrial Functional Safety
Complete integration guide for the TI Hercules TMS5704357BZWTQQ1 dual-core lockstep Cortex-R5F MCU: lockstep CPU, ECC RAM, FlexRay/CAN-FD, and ASIL-D pitfalls.
May 12, 2026
PTN78000WAH Selection Guide: Choosing the Right 1.5 A 36 V Step-Down Power Module
Compare PTN78000WAH against PTN78000WAS, PTN78060WAH, and other 1.5A 36V step-down modules. Covers package, current rating, efficiency, and drop-in replaceability.
May 12, 2026
Why Buy from FindMyChip
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
ULN2003ANE4
Dual-In-Line Packages
Integrated Circuit
OPA2381AIDGKT
Small Outline Packages
Integrated Circuit
CD54HCT75F3A
Ceramic Dual-In-Line Packages
Integrated Circuit
SN65HVD1786D
Small Outline Packages
Integrated Circuit
ULN2003BPWR
Small Outline Packages
Integrated Circuit
ULN2003APWR
Small Outline Packages
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”