TPS3820

具有 0.2s 看門狗和手動(dòng)復(fù)位功能的低電平有效、推挽式電壓監(jiān)控器（復(fù)位 IC）; ? 具有固定延遲時(shí)間 200ms (TPS3823/4/5/8) 或 25ms (TPS3820) 的上電復(fù)位發(fā)生器 \n? 手動(dòng)復(fù)位輸入 (TPS3820/3/5/8)\n? 復(fù)位輸出提供低電平有效 (TPS3820/3/4/5)、高電平有效 (TPS3824/5) 和漏極開路 (TPS3828)\n? 電源電壓監(jiān)控范圍：2.5V、3V、3.3V、5V\n? 看門狗計(jì)時(shí)器 (TPS3820/3/4/8)\n? 電源電流 15μA（典型值）\n? 5 引腳 SOT-23 封裝\n? 溫度范圍：?40°C 至 85°C;

TPS382x 系列監(jiān)控器主要為 DSP 和基于處理器的系統(tǒng)提供電路初始化和計(jì)時(shí)監(jiān)測(cè)等功能。上電期間，RESET 會(huì)在電源電壓 VDD 超出 1.1V 時(shí)置為有效。因此只要滿足以下條件，電源電壓監(jiān)控器就會(huì)監(jiān)測(cè) VDD 并將 RESET 保持為低電平有效：VDD 保持在閾值電壓 VIT? 以下。內(nèi)部計(jì)時(shí)器將會(huì)延遲輸出恢復(fù)至無(wú)效狀態(tài)（高電平）的時(shí)間，以確保系統(tǒng)正常復(fù)位。延遲時(shí)間 td 始于 VDD 上升至高于閾值電壓 (VIT? + VHYS)。當(dāng)電源電壓降到閾值電壓 VIT? 以下時(shí)，輸出再次變?yōu)橛行顟B(tài)（低電平）。無(wú)需外部組件。該系列中的所有器件均具有一個(gè)通過(guò)內(nèi)部分壓器設(shè)定的固定檢測(cè)閾值電壓 VIT–。TPS382x 系列還提供 200ms (TPS3820) 和 1.6s (TPS3823/4/8) 的看門狗超時(shí)選項(xiàng)。

TPS3820

PROCESSOR SUPERVISORY CIRCUITS

TPS3820

Voltage Monitor With Watchdog Timer

TPS3820

Voltage Monitor With Watchdog Timer

TPS3820

Voltage Monitor With Watchdog Timer

TPS3820-Q1

具有 0.2 s 看門狗和手動(dòng)復(fù)位功能的低電平有效、推挽式汽車電壓監(jiān)控器（復(fù)位 IC）; ? Qualified for automotive applications\n? AEC-Q100 Qualified With the Following Results: \n? Device temperature grade 1: –40°C to 125°C\n? Device HBM ESD classification level 2\n? Device CDM ESD classification level C4B\n \n? ESD protection exceeds 2000 V Per MIL-STD-883, Method 3015; using human body model (C?= 100 pF, R = 1500 Ω)\n? Power-on reset generator with fixed delay time of 200 ms (TPS3823/4/5/8-xx-Q1) or 25 ms (TPS3820-xx-Q1) \n? Manual reset input (TPS3820/3/5/8-xx-Q1)\n? Reset output available in active-low (TPS3820/3/4/5-xx-Q1), Active-High (TPS3824/5-xx-Q1), and open drain (TPS3828-xx-Q1)\n? Supply voltage supervision range: 2.5 V, 3 V, 3.3 V, 5 V\n? Watchdog timer (TPS3820/3/4/8-xx-Q1)\n? Supply current of 15 μA (Typical)\n? 5-Pin SOT-23 package\n? Temperature range: ?40°C to 125°C;

For all new designs with TPS3820-xx-Q1, use the TPS3820-xxQPDBVRQ1 part number. The TPS3820-xxQP is functionally equivalent and a replacement to the TPS3820xxQ. The TPS3820-xxQDBVRQ1 is not recommended for new designs (NRND).\n\nThe TPS382x-xx-Q1 family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low 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, 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. The TPS382x-xx-Q1 family also offers watchdog time out options of 200 ms (TPS3820-xx-Q1) and 1.6 s (TPS3823/4/8-xx-Q1).

TPS3820-

PROCESSOR SUPERVISORY CIRCUITS

TPS3820_16

Voltage Monitor With Watchdog Timer

TPS3820-25DBVR

PROCESSOR SUPERVISORY CIRCUITS

TPS3820-25DBVT

PROCESSOR SUPERVISORY CIRCUITS