UNITRODE UCC1946/UCC2946/UCC3946 Microprocessor Supervisor Datasheet

The UCC3946 is a microprocessor supervisor with reset and watchdog functions.

Brand: UNITRODE
Category: Other Electronics
Document type: Datasheet
Language: English
Pages: 6
File format: PDF
File size: 99 KB
Published: 01 August, 2012
Updated: 30 September, 2023
MD5 checksum: 612B233E1753565AF494E4907D3D661E
PDF: UNITRODE UCC1946/UCC2946/UCC3946 Microprocessor Supervisor Datasheet PDF

About this manual

The UNITRODE UCC1946, UCC2946, and UCC3946 are microprocessor supervisor integrated circuits designed to provide accurate reset and watchdog functions. These devices assert a reset signal when the supply voltage drops below a programmable threshold and can generate a reset if the watchdog input is not toggled within a set period. The chips are available in 8-pin SOIC, DIP, and TSSOP packages.

What's inside

Features
Absolute Maximum Ratings
Electrical Characteristics
Pin Descriptions
Application Information
Reset Circuit Timings
Watchdog Circuit Timings
Layout Considerations

Specifications

Operating Voltage (UCC3946)	2.0V to 5.5V
Minimum VDD for Valid Reset	1V
Watchdog Period (Typical)	1.60s

Frequently asked questions

What is the minimum supply voltage for a valid reset?

The reset signal is considered valid down to a minimum supply voltage of 1V.

How is the reset period programmed?

The reset period is programmed by adjusting an external capacitor connected to the RP pin.

How is the watchdog period programmed?

The watchdog period is programmed by adjusting an external capacitor connected to the WP pin.

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