Overview
The UCC2946PWTR, manufactured by Texas Instruments, is a microprocessor supervisor integrated circuit designed to provide accurate supervision of microprocessors, including reset and watchdog functions. This device ensures reliable operation by monitoring the power supply voltage and asserting a reset signal if the voltage drops below a programmable threshold. It is available in an 8-pin TSSOP (PW) package, optimizing board space and offering a wide operating temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 8-pin TSSOP (PW) |
| Operating Temperature Range | -40°C to 85°C |
| Reset Threshold Accuracy | 2% |
| Minimum Input Voltage | 2 V |
| Maximum Input Current | 18 µA |
| Reset Valid Down to | 1 V |
| Supply Voltage Min | 2.1 V |
| Supply Voltage Max | 5.5 V |
| Reset Type | Active-Low |
Key Features
- Fully Programmable Reset Threshold
- Fully Programmable Reset Period
- Fully Programmable Watchdog Period
- 2% Accurate Reset Threshold
- Input Voltage Down to 2 V
- Input 18-µA Maximum Input Current
- Reset Valid Down to 1 V
- Resistant to glitches on the VDD line
- Watchdog function can be tied to an I/O line of the microprocessor
Applications
The UCC2946PWTR is suitable for various applications requiring microprocessor supervision, including:
- Embedded systems
- Industrial control systems
- Automotive electronics
- Medical devices
- Consumer electronics
Q & A
- What is the primary function of the UCC2946PWTR? The primary function is to provide accurate microprocessor supervision, including reset and watchdog functions.
- What is the operating temperature range of the UCC2946PWTR? The operating temperature range is -40°C to 85°C.
- What is the minimum input voltage for the UCC2946PWTR? The minimum input voltage is 2 V.
- How accurate is the reset threshold of the UCC2946PWTR? The reset threshold accuracy is 2%.
- Can the reset threshold and reset period be programmed by the user? Yes, both the reset threshold and reset period are fully programmable by the user.
- What is the maximum input current of the UCC2946PWTR? The maximum input current is 18 µA.
- Is the watchdog function disabled during reset conditions? Yes, the watchdog function is disabled during reset conditions.
- In what package types is the UCC2946PWTR available? It is available in 8-pin SOIC(D), 8-pin PDIP (N), and 8-pin TSSOP(PW) packages.
- What is the significance of the watchdog period in the UCC2946PWTR? The watchdog period is programmable and ensures that if an I/O line tied to the watchdog input is not toggled within this period, a watchdog output signal is asserted.
- Is the UCC2946PWTR resistant to voltage glitches? Yes, it is resistant to glitches on the VDD line.
