TPS3813K33DBVR Part Information
The TPS3813xxx family of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems. During power on, RESET is asserted when supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td = 25 ms typical, starts after VDD has risen above the threshold voltage (VIT). When the supply voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage divider. For safety critical applications the TPS3813xxx family incorporates a so-called window-watchdog with programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting WDT to GND, VDD, or using an external capacitor. The lower limit and thus the window ratio is set by connecting WDR to GND or VDD. The supervised processor now needs to trigger the TPS3813xxx within this window not to assert a RESET. The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 6-pin SOT-23 package. The TPS3813xxx devices are characterized for operation over a temperature range of –40°C to 85°C.
- 6-Pin SOT-23 Package
- Open-Drain Reset Output
- Power-On Reset Generator With a Fixed Delay Time of 25 ms
- Precision Supply Voltage Monitor: 2.5 V, 3 V, 3.3 V, and 5 V
- Supply Current of 9 u00b5A (Typical)
- Temperature Range: u201340u00b0C to 85u00b0C
- Window-Watchdog With Programmable Delay and Window Ratio
|No. of Supervisors / Monitors||1Monitors|
|Supply Voltage Min||2V|
|Supply Voltage Max||6V|
|Reset Type||Active-Low Open-Drain|
|Digital IC Case||SOT-23|
|No. of Pins||6Pins|
|Operating Temperature Min||-40°C|
|Operating Temperature Max||85°C|
|Automotive Qualification Standard||-|
|RoHS Phthalates Compliant||Yes|
|MSL||MSL 1 - Unlimited|
|SVHC||No SVHC (27-Jun-2018)|
Alternative Part Descriptions
- PROCESSOR SUPERVISORY CKT, 2.93V, SOT23; Threshold Voltage:2.93V; No. of Supervisors / Monitors:1Monitors; Supply Voltage Min:2V; Supply Voltage Max:6V; Reset Type:Active-Low, Open-Drain; Digital IC Case:SOT-23; No. of Pins:6Pins; RoHS Compliant: Yes | Newark Electronics
- voltage supervisor (reset IC) with programmable window watchdog | Texas Instruments
Frequently Asked Questions
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The TPS3813K33DBVR is listed under Semiconductors - ICs > Power Management ICs - PMIC > Supervisors & Monitors.
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Yes. This part has been flagged as RoHS Compliant by Farnell.
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