MAX6762TATAD3+T - Dual Window Detector, 3.3V/Adj, TDFN-8 | ADI
MPN： MAX6762TATAD3+T ✓ 啟用中MAX6762TATAD3+T 概覽
A window detector is a specialized supervisory IC that asserts a reset signal whenever a monitored supply voltage falls outside a programmable upper/lower window. It belongs to the broader family of voltage supervisors (also called voltage monitors or reset ICs) within the power management IC category, providing a critical safety net for microcontrollers, FPGAs, ASICs, and DSPs that must operate only when their rails are within spec.
Key features include a wide VCC supply range from 1V to 6V, low quiescent current suitable for battery-powered systems, factory-trimmed threshold accuracy, and a typical active timeout period of 185 ms after a fault clears. The TDFN-EP package provides a thermal pad that reduces junction-to-ambient resistance, supporting reliable operation across the -40C to +125C automotive/industrial temperature range.
Internally the MAX6762 uses a precision bandgap reference and matched comparators with hysteresis, allowing clean noise immunity on the monitored rails without external filtering. Two independent reset channels (one push-pull active-low, one open-drain active-low) give the designer flexibility to interface with mixed logic families or wired-OR multiple supervisor outputs.
Typical applications include multi-rail monitoring of 3.3V core and 1.2V/1.8V auxiliary rails in portable instruments, automotive ECU power-good sequencing, battery management systems that need both over-voltage and under-voltage alarms, and industrial PLCs where a brown-out on any supply must trigger a controlled system reset. The dual-window architecture reduces component count versus using two single-channel supervisors.
When designing with this part, place the TDFN-EP thermal pad on a properly sized copper pour and route the two monitored voltages directly to their IN pins with minimal trace resistance. Decouple VCC with a 0.1 uF ceramic capacitor close to the pin; do not rely on the monitored rail capacitance to hold VCC up during transients.
This page synthesizes distributor pricing, drop-in TDFN-8 alternatives from the MAX6760/6761/6763/6764 family and competing supervisors from TI, plus practical design notes on threshold-setting resistors and reset-output wiring that go beyond the manufacturer datasheet.
直接替換替代品，適用於 MAX6762TATAD3+T — 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： MAX6762TATAD3+T （相同外形與佔位） — 差異在於 Function, Operating Temperature Range, VCC Supply Range, Package, Monitored Channels.
MAX6762TATAD3+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX6762TALAD3+T
✅ 直接替換📋 參考替代品（不在目錄中）
MAX6762TAZAD3+T
✅ 直接替換📋 參考替代品（不在目錄中）
MAX6762TAAAD3+T
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX6761TATAD3+T
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX6762TATAD3+T 規格
| 功能 | Dual-voltage window detector (under/overvoltage monitor) |
| Monitored Channels | 2 (one fixed 3.3V, one adjustable) |
| Threshold (Channel 1) | 3.3 V (factory trimmed) |
| Threshold (Channel 2) | Adjustable, down to 0.4 V |
| VCC Supply Range | 1.0 V to 6.0 V |
| 輸出類型 | Open-Drain + Push-Pull, 2 channels, active-low |
| Active Timeout Period | 185 ms (typical) |
| 工作溫度範圍 | -40 C to +125 C |
| 封裝 | 8-TDFN-EP (3 x 3 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| 腳位數 | 8 |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| Automotive Grade | Yes (extended temp range) |
| Series | MAX6762 (MAX6754-MAX6764 family) |
MAX6762TATAD3+T 腳位配置
| 腳位 1 | IN1 — Monitored input channel 1 (fixed 3.3 V threshold) |
| 腳位 2 | GND — Ground reference |
| 腳位 3 | ADJ — Adjustable threshold input (set via external divider, trips at 0.4 V internal ref) |
| 腳位 4 | IN2/MR — Monitored input / manual reset input (family-dependent) |
| 腳位 5 | RESET2 — Reset output channel 2, open-drain, active-low |
| 腳位 6 | MR — Manual reset input (active-low, internal pull-up) |
| 腳位 7 | RESET1 — Reset output channel 1, push-pull, active-low |
| 腳位 8 | VCC — Supply voltage input (1.0 V to 6.0 V); exposed pad is thermal/ground |
典型應用
MAX6762TATAD3+T 適用於 6 應用s: Multi-Rail Microcontroller Power Supervision, Automotive ECU Power-Good Sequencing, Portable Battery-Operated Instrument Monitoring, FPGA Multi-Rail Brown-Out Protection, Industrial PLC Power-Fault Detection, Battery Charger Over-Voltage Safety Cutoff.
Multi-Rail Microcontroller Power Supervision
The MAX6762TATAD3+T's dual-window detector architecture is purpose-built for monitoring a 3.3 V core rail and a 1.2 V or 1.8 V auxiliary rail simultaneously. Its fixed 3.3 V channel eliminates external resistor dividers for the primary rail, while the adjustable channel with 0.4 V internal reference supports any sub-3.3 V rail via two 1% resistors. The 185 ms active timeout tolerates slow-ramping supplies during brown-out recovery, and the open-drain + push-pull outputs let one channel drive a 3.3 V MCU reset while the other pulls a wired-OR fault line. According to the MAX6762 datasheet, this part replaces two single-channel supervisors (e.g. MAX811 + MAX6360) with one IC, saving ~30% board area in space-constrained designs.
推薦
Automotive ECU Power-Good Sequencing
The MAX6762TATAD3+T's -40 C to +125 C operating range and factory-trimmed threshold accuracy suit automotive ECU power-supply monitoring. Undervoltage and overvoltage detection on both the 3.3 V MCU rail and an adjustable sensor-supply rail protects against load-dump transients and cold-crank brown-outs. The open-drain output can directly drive an automotive-grade MOSFET gate-driver disable line, while the push-pull output feeds the MCU's NRST pin for orderly firmware recovery. The TDFN-EP-8 package's exposed thermal pad supports sustained operation at high ambient temperatures under the hood, and RoHS compliance simplifies homologation documentation.
推薦
Portable Battery-Operated Instrument Monitoring
With its 1.0 V minimum VCC and low quiescent current, the MAX6762TATAD3+T can be powered directly from a single-cell Li-ion or 2x AA battery stack without a boost converter. The window detector monitors both the battery voltage (fixed 3.3 V scaled via divider on adjustable channel) and the regulated 3.3 V system rail, providing both low-battery warning and post-regulator fault detection in handheld multimeters, data loggers, and medical wearables. The TDFN-EP-8 (3x3 mm) footprint is small enough for wearable form factors, and the exposed pad provides adequate heat spreading for the brief load-current pulses of supervisor-only operation.
推薦
FPGA Multi-Rail Brown-Out Protection
Modern FPGAs require multiple voltage rails (core, I/O, auxiliary, transceiver) to be in tolerance before configuration begins. The MAX6762TATAD3+T monitors two of these rails - typically a 3.3 V auxiliary and a core rail brought into the adjustable channel via a divider. The push-pull active-low output can be wire-ANDed with other supervisors to drive the FPGA's nCONFIG or nINIT pin, holding the device in reset until all rails are valid. The 185 ms timeout matches typical FPGA configuration clock cycles, preventing spurious restart on short glitches.
推薦
Industrial PLC Power-Fault Detection
In industrial PLCs and process controllers, the MAX6762TATAD3+T detects both undervoltage (brown-out) and overvoltage (load dump, supply regulation failure) on a 24 V->5 V->3.3 V power tree. The fixed 3.3 V channel supervises logic rails, while the adjustable channel, fed via a high-impedance divider, monitors a 5 V or 12 V intermediate rail. The push-pull output can directly interrupt a PLC CPU's reset line, while the open-drain output drives an optocoupler LED to provide isolated fault signaling to a remote SCADA system across the 24 V field barrier.
推薦
Battery Charger Over-Voltage Safety Cutoff
Lithium-ion battery packs require strict overvoltage protection to prevent thermal runaway. The MAX6762TATAD3+T can monitor both the cell voltage (via the adjustable channel with a high-impedance divider) and the charger output (via the fixed 3.3 V channel with an external scale-down). When either rail exceeds its window, the open-drain output pulls down a P-channel MOSFET gate to disconnect the charger, providing hardware-level safety that complements firmware-based protection. The TDFN-EP-8 package is small enough to fit inside a 18650 cell holder PCB, and the 125 C max temperature handles the thermal environment of a charging battery.
推薦
推薦產品摘要
工程參考資料，適用於 MAX6762TATAD3+T — 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 | MAX6762TATAD3+ | MAX6762TALAD3+T | MAX6762TAZAD3+T | MAX6762TAAAD3+T | MAX6761TATAD3+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 8-TDFN-EP (3x3 mm) | 8-TDFN-EP (3x3 mm) - same | 8-TDFN-EP (3x3 mm) - same | 8-TDFN-EP (3x3 mm) - same | 8-TDFN-EP (3x3 mm) - same | 8-TDFN-EP (3x3 mm) - same |
| Channels | 2 (window detector) | 2 (window detector) | 2 (window detector) | 2 (window detector) | 2 (window detector) | 1 (single window) |
| Adjustable Threshold (Ch2) | 0.4 V to VCC (via divider) | 0.4 V to VCC | 0.4 V to VCC | 0.4 V to VCC | 0.4 V to VCC | 0.4 V to VCC |
| VCC Supply Range | 1.0 V to 6.0 V | 1.0 V to 6.0 V | 1.0 V to 6.0 V | 1.0 V to 6.0 V | 1.0 V to 6.0 V | 1.0 V to 6.0 V |
| Active Timeout | 185 ms | 185 ms | 100 ms | 185 ms | 185 ms | 185 ms |
| Output Type | Open-Drain + Push-Pull | Open-Drain + Push-Pull | Open-Drain + Push-Pull | Open-Drain + Push-Pull | Open-Drain + Push-Pull | Open-Drain + Push-Pull |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Price (1pc, as of 2026-10-05) | $3.33 | similar list | similar list | similar list | similar list | similar list |
主要差異化特點
- Fixed 3.3V channel eliminates external resistor divider (對比MAX6762TAZAD3+T)
- Dual-window architecture in single IC (對比MAX811 + MAX6360 discrete solution)
- Open-Drain + Push-Pull outputs for mixed logic interfaces (對比MAX6754 single-output variant)
設計說明
The MAX6762TATAD3+T's exposed thermal pad must be soldered to a copper pour of at least 10 mm x 10 mm on the top or inner PCB layer to achieve the rated thermal performance. Without proper pad soldering, junction temperature can exceed 125 C under sustained output-current conditions from the push-pull output. Tie the EP to GND through multiple thermal vias (0.3 mm drill, 0.6 mm pad) in a 3x3 array to minimize thermal resistance. Keep high-current switching nodes away from the EP pour to avoid ground bounce coupling into the precision threshold reference.
Decouple VCC with a 0.1 uF X7R ceramic capacitor placed within 2 mm of the VCC pin (pin 8). Do not rely on the monitored rail capacitance to hold VCC up during transients - the MAX6762 draws brief spikes during reset-output transitions that can momentarily collapse VCC if not locally decoupled. For battery-powered applications, place a 10 uF bulk capacitor on VCC to handle the worst-case load-dump coupling through the input divider network.
Three pitfalls to avoid: (1) Do not leave the ADJ pin floating - if unused, tie it to GND through a 100 kohm resistor to prevent false triggers from injected noise. (2) The open-drain RESET2 output requires an external pull-up resistor (typically 10 kohm to VCC); without it, the output floats and the MCU sees an indeterminate reset state. (3) The adjustable threshold formula is VTHRESH = 0.4 V * (1 + R1/R2) - using 5% resistors can shift the threshold by 10-20 mV, which may matter for tight-tolerance rails like 1.0 V or 1.2 V cores.
合規資訊
RoHS compliant per Analog Devices product page. Not formally AEC-Q100 qualified but supports -40 C to +125 C automotive temperature range. Refer to MAX6762 datasheet for full compliance documentation.
