UCC2946D Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments UCC2946D is a processor supervisor and voltage monitor covering 2.1 V to 5.5 V supply range with watchdog timer and 1.235 V adjustable reset threshold in an 8-pin SOIC package. It ensures safe processor restart on undervoltage or watchdog timeout conditions. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- UCC2946D Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0000(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UCC2946D?
- Adjustable reset threshold with precision 1.235 V internal reference for monitoring custom supply voltages from 2.1 V to 5.5 V
- Integrated watchdog timer generating system reset on software lock-up, improving embedded system reliability without external components
- 8-pin SOIC package with active-low RESET output and manual RESET input for complete processor supervisor functionality
What is UCC2946D used for?
The UCC2946D is designed for embedded processor supervision in industrial controllers, communications equipment, and automotive ECUs where reliable system restart after power glitches or software lock-up is critical. Its adjustable threshold and watchdog timer enable robust system health monitoring in single-board computers, FPGA configuration circuits, and safety-critical microcontroller systems operating from 3.3 V or 5 V regulated supplies.
What are the specifications of UCC2946D?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | RESET THRESHOLD VOLTAGE IS 1.235V |
| Adjustable Threshold | YES |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.018mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.1V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +1.235V |
| 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 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mexico |
Where can I find the UCC2946D datasheet?
UCC2946D Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UCC2946D?
Compatible alternatives and drop-in replacements for UCC2946D:
Voltage Supervisor/Reset IC, Adjustable, 1 Channel, +1.235V, BICMOS, PDSO8
Frequently Asked Questions
What supply voltage range does UCC2946D monitor and how is the reset threshold set?
The UCC2946D monitors supply voltages from 2.1 V to 5.5 V. The reset threshold is set using an external resistor divider referenced to the internal 1.235 V precision bandgap reference, allowing designers to configure precise thresholds such as 90% of nominal (e.g., 2.97 V for a 3.3 V rail) with resistor values in the 100 kΩ range.
How does the integrated watchdog timer in UCC2946D protect a microcontroller from software lock-up?
The UCC2946D watchdog timer requires periodic toggling of the WDI input pin. If the microcontroller fails to toggle WDI within the programmed timeout period—typically set between 1.6 ms and 1.6 s using an external capacitor—the supervisor asserts a RESET pulse, restarting the processor and recovering from code hang states without human intervention.
How does UCC2946D simplify PCB design compared to implementing discrete reset and watchdog circuits?
The UCC2946D integrates voltage supervisor, watchdog timer, manual RESET input, and active-low RESET output in a single 8-pin SOIC package. This replaces a discrete implementation requiring a comparator, RC timer network, logic gate, and at least 3 passive components, reducing BOM by approximately 5-7 parts and saving 30 mm² of PCB area.
In which operating temperature range is UCC2946D rated and which industrial environments does that cover?
The UCC2946D is rated for operation across the commercial and industrial temperature range of -40°C to +85°C, making it suitable for outdoor industrial control panels, factory automation equipment, and communications infrastructure exposed to sub-zero startup conditions and high ambient temperatures in uncontrolled environments.
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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
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.0800 | $3.08 |
| 100+ | $2.3100 | $231.00 |
| 1000+ | $2.0000 | $2000.00 |
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