TPS3700DSET - 18V Window Voltage Detector | Texas Instruments
Артикул: TPS3700DSET ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $1.18 | $1,18 |
| 10 | $1.02 | $10,20 |
| 100 | $0.81 | $81,00 |
| 500 | $0.65 | $325,00 |
| 1.000 | $0.52 | $520,00 |
TPS3700DSET Обзор
A window voltage detector is a type of voltage supervisor or comparator circuit that monitors an input rail and asserts an alert whenever the rail falls outside a programmer-defined upper and lower threshold. It belongs to the broader family of comparators (amplifier ICs) which sit within power management ICs, and is commonly used as a safety watchdog in microprocessor and DSP power systems. Compared to single-threshold comparators, the window detector adds redundancy by failing-fast on both excursions, which is critical for ASIC rails, battery stacks, and industrial 24 V systems.
Key features include a wide supply voltage range of 1.8 V to 18 V, threshold accuracy of 1.0% over temperature (0.25% typical), a low quiescent current of 5.5 uA typical, and built-in hysteresis on both comparators to reject brief glitches without false triggering. The monitored thresholds are set via external resistor dividers referenced to the internal 400 mV band-gap, and the two open-drain outputs can be pulled up to as high as 18 V for direct interface to logic rails or opto-isolators.
The TPS3700DSET uses a CMOS architecture with a precision bandgap reference and twin comparators, giving it a clean offset and temperature-stable trip point across the -40C to +125C junction temperature range. The wide supply tolerance also lets it operate directly from 12 V and 15 V industrial rails without pre-regulation.
Typical applications include overvoltage and undervoltage monitoring on 12 V industrial rails, battery-pack protection in multi-cell stacks, system reset generation for DSPs and microcontrollers, fault detection in PLC and motor-drive systems, and redundant safety supervision in medical and automotive subsystems.
When designing with this device, choose the resistor divider ratio so the monitored voltage equals 400 mV at the desired trip point; hysteresis is fixed by internal design, but selection of the resistor network affects overall accuracy and input bias current error.
This page consolidates verified distributor pricing, drop-in alternatives, and practical design notes for engineers evaluating the TPS3700DSET as a window supervisor.
Аналоги без доработки для TPS3700DSET — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с TPS3700DSET (тот же форм-фактор и посадочное место) — отличается по Package, Output Type, Product Type, Operating Temperature Range, RoHS Status.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
TPS3700DSER
✅ Прямая замена✓ В наличии
$1.05 / шт.
Открыть даташит →TPS3700DSERQ1
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TPS3700DDCT
✅ Прямая замена✓ В наличии
$0.2729 / шт.
Открыть даташит →TPS3700DDCR
✅ Прямая замена✓ В наличии
$0.62 / шт.
Открыть даташит →TPS3700DSET Максимальные параметры и электрические характеристики
| Product Type | Window Voltage Detector |
| Number of Comparators | 2 |
| Тип выхода | Open-Drain |
| Supply Voltage Range | 1.8 V to 18 V |
| Internal Reference Voltage | 400 mV |
| Threshold Accuracy | 1.0% (0.25% typical) |
| Quiescent Current (Typical) | 5.5 uA |
| Quiescent Current (Maximum) | 13 uA |
| Propagation Delay (Maximum) | 29 us |
| Диапазон рабочих температур | -40C to +125C |
| Корпус | 6-WSON (1.5 mm x 1.5 mm) |
| Тип монтажа | Surface Mount |
| Comparator Inputs | Adjustable via external resistor divider |
| Hysteresis | Built-in on both comparators |
| Статус RoHS | Compliant |
| Halogen-Free Status | Compliant |
| ECCN | EAR99 |
Конфигурация выводов TPS3700DSET
| Контакт 1 | OUT1 — Open-drain comparator output 1 (typically overvoltage flag) |
| Контакт 2 | SENSE1 — Comparator 1 threshold input (external resistor divider to monitored rail) |
| Контакт 3 | GND — Ground reference |
| Контакт 4 | SENSE2 — Comparator 2 threshold input (external resistor divider) |
| Контакт 5 | OUT2 — Open-drain comparator output 2 (typically undervoltage flag) |
| Контакт 6 | IN — Supply voltage input (1.8 V to 18 V) |
Типичное применение
TPS3700DSET подходит для 6 применениеs: 12 V Industrial Rail Monitoring, Multi-Cell Battery Stack Protection, DSP/Microcontroller Reset Supervision, PLC and Motor Drive Fault Detection, Redundant Safety Supervision (Medical / Industrial), Battery-Backed Equipment Watchdog.
12 V Industrial Rail Monitoring
The TPS3700DSET directly monitors 12 V to 15 V industrial supply rails, asserting a fault flag whenever the rail strays outside the OV/UV window set by external resistor dividers. With its 1.8 V to 18 V supply tolerance and 400 mV internal reference, no pre-regulator is needed; the two open-drain 18 V-rated outputs can pull directly to the rail being monitored. The 5.5 uA quiescent current adds negligible load, and the 29 us propagation delay is fast enough to initiate a controlled shutdown before downstream loads misbehave. Typical placement is at the input of the load, upstream of bulk capacitance, so glitches on the rail are caught before they propagate.
Рекомендуется
Multi-Cell Battery Stack Protection
The TPS3700DSET supervises individual cells or stack nodes in a multi-cell lithium-ion or industrial battery pack, providing redundant undervoltage and overvoltage alarms on a single IC. The 400 mV internal reference lets the cell voltage be scaled via a high-impedance divider, and the two open-drain outputs can be wire-ORed to a single MCU interrupt. Compared to a discrete dual-comparator implementation, the TPS3700DSET saves board area, eliminates reference drift between comparators, and reduces quiescent draw to a typical 5.5 uA. The 1.0% accuracy over -40C to +125C supports outdoor energy-storage deployments where temperature swings are large.
Рекомендуется
DSP/Microcontroller Reset Supervision
The TPS3700DSET serves as a window supervisor for a DSP or microcontroller core rail, generating a reset when the rail falls outside the safe operating range and a separate alert for transient glitches. The two open-drain outputs feed the MCU reset pin and a non-maskable interrupt input respectively, enabling either full reset or interrupt-driven recovery. The TPS3700DSET window-detect topology means slow drift outside the band is caught, while the built-in comparator hysteresis rejects brief transients without false triggering. The 29 us response time is well-aligned with typical DSP power-good reset requirements.
Рекомендуется
PLC and Motor Drive Fault Detection
In PLC and motor-drive systems, the TPS3700DSET monitors the 24 V field supply and the auxiliary 5 V to 15 V rails used to power gate drivers and interface logic. The 18 V output rating tolerates inductive flyback transients on long cables, while the 1.8 V minimum operating voltage makes it usable directly on 3.3 V logic rails. Open-drain outputs permit direct interface to safety relays or PLC digital inputs with a shared pull-up. Compared with single-rail supervisors, the window-detect architecture catches both brown-out and over-voltage events, which is critical for IEC 61131-3 functional safety designs.
Рекомендуется
Redundant Safety Supervision (Medical / Industrial)
Medical and industrial safety subsystems use the TPS3700DSET as a redundant window-voltage monitor that flags out-of-range conditions on isolated rails, complementing a primary supervisor on the same node. The 1.0% threshold accuracy over temperature provides the deterministic trip point needed for fault-tree analysis, while the low 5.5 uA Iq keeps dissipation minimal in isolated bias supplies. The two independently-asserted open-drain outputs (one per comparator) let the system distinguish OV events from UV events without extra decoding logic. This split-output capability supports IEC 60601-1 and IEC 61508 architectures where separate fault paths are required.
Рекомендуется
Battery-Backed Equipment Watchdog
The TPS3700DSET watches a backup battery rail or supercapacitor stack in alarm panels, IoT gateways, and metering equipment, asserting an alert before the rail collapses below the operational threshold. The 1.8 V minimum supply allows operation directly from a single lithium coin cell down to its end-of-life voltage, extending the supervisor's useful monitoring range. The open-drain output can wake a low-power MCU from sleep via an external interrupt without additional glue logic. With a typical 5.5 uA draw, the TPS3700DSET itself does not significantly shorten battery life while it monitors for impending brown-out.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для TPS3700DSET — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | TPS3700DSER | TPS3700DSERQ1 | TPS3700DDCT | TPS3700DDCR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 6-WSON (1.5x1.5) | 6-WSON (1.5x1.5) - identical footprint | 6-WSON (1.5x1.5) - identical footprint | SOT-6 - DIFFERENT footprint | SOT-6 - DIFFERENT footprint |
| Supply Voltage Range | 1.8 V to 18 V | 1.8 V to 18 V | 1.8 V to 18 V | 1.8 V to 18 V | 1.8 V to 18 V |
| Quiescent Current (Typ) | 5.5 uA | 5.5 uA | 5.5 uA | 5.5 uA | 5.5 uA |
| Threshold Accuracy | 1.0% over temp | 1.0% over temp | 1.0% over temp | 1.0% over temp | 1.0% over temp |
| Propagation Delay (Max) | 29 us | 29 us | 29 us | 29 us | 29 us |
| Internal Reference | 400 mV | 400 mV | 400 mV | 400 mV | 400 mV |
| AEC-Q100 Automotive Grade | No | No | Yes | No | No |
Ключевые отличия
- Only 1.5 mm x 1.5 mm 6-WSON window detector from TI at this spec tier (против TPS3700DDCT (SOT-6))
- Internal 400 mV reference eliminates external reference IC (против Discrete dual-comparator implementation using LM393)
- Two independent open-drain 18 V-rated outputs (против Single-output supervisors like TLV809)
Заметки по проектированию
The TPS3700DSET pulls its operating supply directly from IN (1.8 V to 18 V); place a 0.1 uF X7R bypass capacitor within 5 mm of the IN pin and a 1 uF bulk cap on the supply node to suppress false trips during rail transients. Estimated: at 5 uA Iq the resistor-divider bias current should exceed 100x Iq to maintain 1.0% trip accuracy, so keep the divider string below 100 kohm equivalent.
Route the SENSE1 and SENSE2 traces as short as possible and away from switching-node traces; each node has only the comparator's input bias current flowing through it, so a 10 kohm parasitic resistance translates directly to a 1 mV threshold error. Use a guard ring tied to GND around the sense traces if the layout forces routing near noisy signals.
Do not tie the OUT1/OUT2 pull-up resistor to a voltage above 18 V; the open-drain outputs are only rated to 18 V absolute maximum, per the TI TPS3700 datasheet absolute-maximum table. Also, when switching from the DSET (250-piece reel) to the DSER (3000-piece reel) on an existing PCB, confirm the reel size does not affect placement equipment at your CM.
Both comparators include built-in hysteresis to reject brief glitches, but high-impedance sense nodes can still pick up RF; place a 10 pF to 100 pF cap in parallel with the lower divider resistor to form a low-pass filter with corner below 100 kHz. The total propagation delay of 29 us means the TPS3700DSET cannot catch sub-microsecond transients - add a TVS for spike protection.
Информация о соответствии
RoHS and halogen-free compliant per GlobalSpec cross-reference data. Not AEC-Q100 qualified - select TPS3700DSERQ1 for automotive. ECCN EAR99 (no export license required for most destinations).
