TPS3126
- Minimum supply voltage of 0.9V
- Supply voltage supervision range:
- 1.2V, 1.5V, 1.8V (TPS312x)
- 3V (TPS3125 devices only)
- Other versions on request
- Power-on reset generator with fixed delay time of 180ms
- Manual reset input (TPS3123/5/6/8)
- Watchdog timer retriggers the RESET output at VDD ≥ VIT-
- Supply current of 14µA (typical)
- Small SOT23-5 package
- Temperature range of –40°C to +85°C
- Reset output available in Push-Pull (Active-Low and High) and Open-Drain (Active-Low)
The TPS312x family of voltage supervisory circuits provides voltage monitoring down to 1.2V rails and timing supervision, primarily for DSP and processor-based systems. All devices in the family monitor the power rail and assert RESET output when the power rail is under the threshold voltage target (VIT-). The threshold voltage is programmed into the device to minimize external components. Built-in hysteresis prevents false triggering. The RESET output is not valid for supply voltage (VDD) under 0.9V. The TPS312x family includes devices with active high output for use as disable during malfunction and active-low outputs for most systems where high output indicates properly functioning system.
The TPS3123/3124/3128 also include the watchdog timer functionality to monitor timely digital pulses from the processor and issue an alert if the expected pulse does not arrive on time due to potential software freeze or hang. Such integration of supply rail monitoring and the watch dog timer feature is very helpful in always on systems, such as Factory Automation and Communications Infrastructure.
In addition the TPS3123/5/6/8 devices incorporate a manual reset input, MR, to force RESET triggered by an event unrelated to the voltage rail monitoring of the pulses monitored by the watch dog timer. A low level at MR causes RESET to become active. The TPS3124 devices do not have the input MR, but include a high-level output RESET same as the TPS3125 and TPS3126 devices.
All devices in the family are available in a 5-pin SOT23-5 package and are characterized for operation over a temperature range of –40°C to +85°C.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS3123 Ultra-Low Voltage Processor Supervisory Circuits datasheet (Rev. H) | PDF | HTML | 2025/3/21 | ||
| 選擇指南 | Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) | 2020/2/28 | ||||
| 電子書 | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/6/28 | ||||
| 應用說明 | Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs | 2011/9/19 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |