UCC3946PWTR
Active0°C TO 70°C, MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
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UCC3946PWTR
Active0°C TO 70°C, MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
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Technical Specifications
Parameters and characteristics for this part
| Specification | UCC3946PWTR |
|---|---|
| Mounting Type | Surface Mount |
| Number of Voltages Monitored | 1 |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Output | Totem Pole, Push-Pull |
| Package / Case | 8-TSSOP |
| Package / Case [custom] | 0.173 " |
| Package / Case [custom] | 4.4 mm |
| Reset | Active Low |
| Reset Timeout | 160 ms |
| Supplier Device Package | 8-TSSOP |
| Type | Simple Reset/Power-On Reset |
| Voltage - Threshold | Adjustable/Selectable |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2000 | $ 2.30 | |
| Texas Instruments | LARGE T&R | 1 | $ 3.98 | |
| 100 | $ 3.49 | |||
| 250 | $ 2.45 | |||
| 1000 | $ 1.97 | |||
Description
General part information
UCC3946 Series
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.
Documents
Technical documentation and resources