UCC2946 Series
-40°C to +90°C, microprocessor supervisor with watchdog timer
Manufacturer: Texas Instruments
Catalog(6 parts)
| Part | Number of Voltages Monitored▲▼ | Reset Timeout▲▼ | Package / Case▲▼ | Package / Case | Mounting Type | Supplier Device Package | Reset | Operating Temperature▲▼ | Operating Temperature▲▼ | Output | Type | Voltage - Threshold |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 ul | 0.14000000059604645 s | 0.003899999894201755 m | 8-SOIC | Surface Mount | 8-SOIC | Active Low | 85 °C | -40 °C | Push-Pull, Totem Pole | Simple Reset/Power-On Reset | Adjustable/Selectable | |
1 ul | 0.14000000059604645 s | 8-TSSOP (0.173", 4.40mm Width) | Surface Mount | 8-TSSOP | Active Low | 85 °C | -40 °C | Push-Pull, Totem Pole | Simple Reset/Power-On Reset | Adjustable/Selectable | ||
1 ul | 0.14000000059604645 s | 0.003899999894201755 m | 8-SOIC | Surface Mount | 8-SOIC | Active Low | 85 °C | -40 °C | Push-Pull, Totem Pole | Simple Reset/Power-On Reset | Adjustable/Selectable | |
1 ul | 0.14000000059604645 s | 8-TSSOP (0.173", 4.40mm Width) | Surface Mount | 8-TSSOP | Active Low | 85 °C | -40 °C | Push-Pull, Totem Pole | Simple Reset/Power-On Reset | Adjustable/Selectable | ||
1 ul | 0.14000000059604645 s | 0.003899999894201755 m | 8-SOIC | Surface Mount | 8-SOIC | Active Low | 85 °C | -40 °C | Push-Pull, Totem Pole | Simple Reset/Power-On Reset | Adjustable/Selectable | |
1 ul | 0.14000000059604645 s | 8-TSSOP (0.173", 4.40mm Width) | Surface Mount | 8-TSSOP | Active Low | 85 °C | -40 °C | Push-Pull, Totem Pole | Simple Reset/Power-On Reset | Adjustable/Selectable |
Key Features
• Fully Programmable Reset ThresholdFully Programmable Reset PeriodFully Programmable Watchdog Period2% Accurate Reset ThresholdInput Voltage Down to 2 VInput 18-µA Maximum Input CurrentReset Valid Down to 1 VFully Programmable Reset ThresholdFully Programmable Reset PeriodFully Programmable Watchdog Period2% Accurate Reset ThresholdInput Voltage Down to 2 VInput 18-µA Maximum Input CurrentReset Valid Down to 1 V
Description
AI
The UCCx946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signalRESwith VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.
The UCCx946 is also resistant to glitches on the VDD line. OnceREShas been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in Figure 1. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions. If the I/O line is not toggled within a set watchdog period, programmable by the user, WDO is asserted. The watchdog function is disabled during reset conditions.
The UCCx946 is available in 8-pin SOIC(D), 8-pin PDIP (N) and 8-pin TSSOP(PW) packages to optimize board space.
The UCCx946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signalRESwith VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.
The UCCx946 is also resistant to glitches on the VDD line. OnceREShas been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in Figure 1. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions. If the I/O line is not toggled within a set watchdog period, programmable by the user, WDO is asserted. The watchdog function is disabled during reset conditions.
The UCCx946 is available in 8-pin SOIC(D), 8-pin PDIP (N) and 8-pin TSSOP(PW) packages to optimize board space.