TPS3700DDCR2 - 18V Window Comparator | Texas Instruments
MPN： TPS3700DDCR2 ✓ 啟用中TPS3700DDCR2 概覽
A window voltage detector compares a monitored supply against internally generated upper and lower thresholds. It can operate as a two-channel window comparator or as two independent voltage monitors. This device belongs to the comparator hierarchy, combines a voltage detector function with a precision internal reference, and sits within the broader power management semiconductor and system monitoring categories.
The TPS3700DDCR2 provides two separate open-drain indication outputs, allowing a system to identify both undervoltage and overvoltage conditions. Its 18 V output rating supports monitoring applications above the voltage range commonly handled by basic low-voltage comparator ICs. The internal 400 mV reference provides the basis for externally programmed detection thresholds.
Both comparators include built-in hysteresis according to the manufacturer product information. Hysteresis helps reject brief input disturbances and improves output stability when the monitored voltage is close to a threshold. The device can be configured through external components for different supply ranges, reducing the need for a separate precision reference when the application requires upper and lower fault detection.
Typical uses include industrial equipment monitoring, battery-powered systems, communication equipment, consumer electronics, and power rails where the system must disable downstream circuitry during an invalid voltage condition. The two independent outputs can also support separate fault-reporting paths in redundant or multi-rail architectures.
When designing the circuit, calculate the resistor-defined upper and lower thresholds against the monitored input range, and verify that every pulled-up open-drain output remains below its 18 V rating. The SOT-23-THIN package also requires careful PCB layout and thermal review when the surrounding circuitry or board raises the device temperature.
This product page combines verified manufacturer and distributor information with pin-compatible alternatives, parameter comparisons, application guidance, and practical design notes so engineers can evaluate the TPS3700DDCR2 alongside replacement options without treating merely similar supervisors as exact drop-in parts.
直接替換替代品，適用於 TPS3700DDCR2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TPS3700DDCR2 （相同外形與佔位） — 差異在於 Output Type, Package, Output Voltage Rating, Product Type, RoHS Status.
TPS3700DDCR
✅ 直接替換聯絡詢價
查看資料表 →TPS3701DDCR
✅ 直接替換聯絡詢價
查看資料表 →TPS3702CX50DDCT
✅ 直接替換📋 參考替代品（不在目錄中）
TPS3702CX10DDCT
✅ 直接替換📋 參考替代品（不在目錄中）
TPS3700DDCT
✅ 直接替換聯絡詢價
查看資料表 →TPS3700DDCR2 最大額定值與電氣特性
| Product Type | 18 V window voltage detector |
| Operating Supply Range | 1.8 V to 18 V |
| Number of Comparators | 2 |
| Internal Reference Voltage | 400 mV |
| 輸出類型 | Open-drain |
| Output Voltage Rating | 18 V |
| Monitoring Functions | Overvoltage and undervoltage detection |
| Operating Modes | Window comparator or two independent voltage monitors |
| Threshold Configuration | Externally programmable |
| Hysteresis | Built into both comparators |
| 封裝 | 6-pin SOT-23-THIN |
| 安裝類型 | Surface mount |
| Junction Temperature Range | -40°C to 125°C |
TPS3700DDCR2 6-pin sot-23-thin 腳位配置指南
TPS3700DDCR2（6-pin sot-23-thin 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： TPS3700DDCR2.
請參閱 資料表 以查看完整腳位配置。
典型應用
TPS3700DDCR2 適用於 6 應用s: Industrial 24 V Rail Monitoring, Battery-Powered Equipment Protection, Communications Equipment Supply Fault Detection, Consumer Electronics Overvoltage Protection, Multi-Rail Power-Sequencing Control, Test and Measurement Input Protection.
Industrial 24 V Rail Monitoring
The TPS3700DDCR2 is appropriate for monitoring a nominal 24 V industrial bus after suitable external threshold scaling. Its documented 1.8 V to 18 V monitored range does not directly accept 24 V, so the implementation requires a divider or other scaling network that keeps every input within the device limits. The two open-drain outputs can separately indicate undervoltage and overvoltage, while built-in hysteresis helps suppress short disturbances near either boundary. Engineers must verify divider power ratings, fault thresholds, pull-up voltage, and transient protection rather than connecting 24 V directly.
推薦
Battery-Powered Equipment Protection
TPS3700DDCR2 can supervise a battery-derived rail when its operating range and threshold configuration suit the cell chemistry and regulator topology. Two independent monitoring outputs allow the controller to distinguish an undervoltage condition from an overvoltage condition, which is useful for protecting storage, radio, or processor loads. The 400 mV internal reference and external resistor network establish the detection boundaries, while comparator hysteresis reduces false fault reports during normal battery transitions. A production design must check whether the battery voltage remains within 1.8 V to 18 V at the monitor input.
推薦
Communications Equipment Supply Fault Detection
The TPS3700DDCR2 can provide separate fault flags for communication equipment with multiple power domains. Each open-drain output can be pulled up and routed to an FPGA, MCU, reset controller, or system-management logic, allowing undervoltage and overvoltage conditions to be handled independently. The 18 V output rating provides margin for pull-ups on suitable supply rails, and the built-in hysteresis improves stability when a switching regulator causes brief rail movement. System designers should still verify startup timing, fault-response requirements, isolation, and the voltage seen by every monitored input.
推薦
Consumer Electronics Overvoltage Protection
TPS3700DDCR2 can supervise a regulated consumer-electronics rail and provide fault information before downstream circuitry experiences an invalid voltage. The two comparator outputs are useful when a system must distinguish low-input startup conditions from excessive rail voltage. The internal 400 mV reference supports threshold definition with external resistors, and the compact SOT-23-THIN package preserves board area. For USB, battery, or wall-powered products, engineers must confirm that all monitored rails and pull-ups remain within the documented 1.8 V to 18 V range.
推薦
Multi-Rail Power-Sequencing Control
TPS3700DDCR2 can support multi-rail supervision by operating as two independent voltage monitors rather than only as a combined window comparator. Each output may be assigned to a different supply domain, allowing supervisory logic to recognize two separate fault conditions. The open-drain architecture permits wired signaling with an external pull-up and suitable logic interface. Sequencing behavior is not automatic, so the application must define how monitor outputs interact with regulators, reset controllers, and load switches to avoid ambiguous or conflicting fault responses.
推薦
Test and Measurement Input Protection
The TPS3700DDCR2 can be used in test and measurement equipment to flag an input rail that has moved below or above an acceptable operating range. Two open-drain outputs can drive status LEDs, relay logic, or a front-panel controller, while the internal 400 mV reference enables threshold selection with external components. Hysteresis helps avoid flickering indications when the monitored rail contains small switching or measurement disturbances. Instrument designers must account for high-voltage transients, input impedance, leakage into the divider, and whether fault signaling should latch or remain live.
推薦
推薦產品摘要
工程參考資料，適用於 TPS3700DDCR2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS3700DDCR | TPS3701DDCR | TPS3702CX50DDCT | TPS3702CX10DDCT | TPS3700DDCT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT-23-THIN-6 | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package |
主要差異化特點
- Wide monitored voltage range (對比TPS3701DDCR)
- Integrated precision reference (對比TPS3702CX50DDCT)
- Independent fault outputs (對比TPS3700DDCR)
設計說明
Treat the open-drain outputs as pull-up nodes rather than actively driven logic outputs. Select a pull-up resistor that keeps the high-state current within the device's output limits and keep the pull-up voltage at or below the documented 18 V output rating. Place the pull-up close to the receiving logic when long PCB traces could introduce capacitive noise. Because the supplied evidence does not specify output sink current or input leakage, those values must be confirmed from the official TPS3700 datasheet before finalizing the interface.
Do not assume that the 18 V device rating permits an 18 V monitored bus at the input pin. The verified operating range is 1.8 V to 18 V, and practical designs normally use an external resistor divider to derive the upper and lower thresholds from the 400 mV internal reference. Verify the divider ratios, resistor tolerances, input current, and maximum transient voltage. Using a divider without checking power dissipation or fault behavior can create inaccurate thresholds or excessive divider power.
Keep the divider, reference-related components, and monitored input trace away from switching nodes and high-current return paths. Route the open-drain outputs as short, clearly separated nets and provide adequate ground return for the monitor. The SOT-23-THIN package is compact, so preserve exposed copper around its pads when the board layout and assembly process allow it. Confirm the official land pattern, pin numbering, solder mask, and paste pattern rather than relying only on the generic package name.
Built-in hysteresis helps reject brief glitches, but it does not remove continuous noise or ensure a specific fault-response time. Evaluate the monitored rail's noise amplitude and switching edges against the hysteresis and threshold tolerances shown in the official datasheet. If a fault must be latched, use external logic or a supervisor with the required latch behavior rather than assuming the comparator output itself holds a fault state indefinitely.
合規資訊
The supplied verified snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance attributes were therefore left unknown rather than inferred from the manufacturer or distributor listings.
