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Analog Devices Inc./Maxim Integrated MAX6756UKTD3+T
- Part No.:
- MAX6756UKTD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6756UKTD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,180
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Product details
Overview
The MAX6756UKTD3+T from Analog Devices is a low-power, single-supply window voltage detector with factory-trimmed 3.3V nominal monitoring, ±10% window (2.97V–3.63V), active-low open-drain RESET output, manual reset input (MR), and 100ms minimum timeout period. It operates from 1.0V to 6.0V supply, draws only 13–30µA, and is used in telecom power rails and DC-DC converter modules for reliable undervoltage/overvoltage fault signaling.
For engineers reviewing the MAX6756UKTD3+T datasheet, MAX6756UKTD3+T pinout, MAX6756UKTD3+T application, or MAX6756UKTD3+T equivalent, key selection criteria include its SOT23-5 package, fixed 3.3V threshold with ±10% window, open-drain RESET output compatible with 1.8V–5V logic, MR-driven reset assertion, and guaranteed operation from –40°C to +125°C.
Technical Context
The MAX6756UKTD3+T implements a precision internal bandgap reference and comparator-based window detection architecture. It monitors VCC directly as both power source and monitored voltage, asserting RESET when VCC falls below UVTH (2.97V) or rises above OVTH (3.63V), with hysteresis of 0.7% to prevent chatter during slow transitions.
Its SET pin is tied to VCC to configure the ±10% window, and the MR input provides asynchronous reset control with 4µs minimum pulse width and 300ns propagation delay. The D3 suffix confirms 100ms minimum timeout after UV/OV recovery before RESET deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Monitoring Type | Single-voltage window detector: monitors only VCC (3.3V nominal) |
| UV/OV Thresholds | UVTH = 2.97V, OVTH = 3.63V (±10% window at TA = –40°C to +125°C) |
| Output Type | Active-low open-drain RESET - requires external pull-up; sinks ≥100µA at VOL ≤0.3V |
| Timeout Period | D3 option: 100ms (min), 185ms (typ), 320ms (max) after VCC returns to valid range |
| Supply Current | 13µA (min) to 30µA (max) at VCC = 3.6V, enabling ultra-low-power system monitoring |
| Operating Temp | –40°C to +125°C - qualified for automotive and industrial environments |
| Reset Propagation | tD-RESET = 20µs max - ensures fast response to supply faults |
Pinout & Package
MAX6756UKTD3+T is housed in a 5-pin SOT23-5 package (package code U5+1A, outline 21-0057), with exposed pad not present. Pin functions are validated per Maxim Integrated datasheet Rev 12 (2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power Input & Monitored Voltage | VCC powers the IC and is the sole voltage being monitored; RC filter (100Ω + 0.1µF) recommended for noise immunity |
| 2 - GND | Ground Reference | Analog and digital ground return; must be low-impedance connection to system GND plane |
| 3 - MR | Active-Low Manual Reset | Drives RESET low when asserted; internally pulled up to VCC via 26kΩ resistor; 4µs min pulse width required |
| 4 - RESET | Open-Drain Output | Asserts low on UV/OV fault or MR activation; deasserts after 100ms timeout; requires external pull-up resistor |
| 5 - SET | Window Select Input | Tied to VCC to select ±10% window; no external biasing needed for this variant |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed 3.3V Window | Eliminates external resistor networks; ±10% tolerance (2.97V–3.63V) over full temperature range |
| 100ms Minimum Timeout | Prevents premature microprocessor release during slow power ramp-up; guarantees stable reset hold time |
| 10µA Typical Quiescent Current | Enables always-on monitoring in battery-backed or energy-constrained systems without significant drain |
| –40°C to +125°C Operation | Validated performance across automotive under-hood and industrial control ambient conditions |
| Open-Drain RESET Output | Allows wired-OR configuration with other reset sources and compatibility with mixed-voltage logic domains |
Applications
| Telecom Power Supervision | Server PSU Monitoring |
|---|---|
Use Scenario: Monitoring 3.3V bias rail in optical line terminal (OLT) power distribution units. IC Role / Device Role / Timing Role: Window detector asserting open-drain RESET to FPGA supervisory logic upon rail collapse or surge. Use Value: Prevents corrupted firmware execution by holding reset until 3.3V stabilizes for ≥100ms post-fault. | Use Scenario: Fault detection on 3.3V standby (VSB) rail in redundant server power supplies. IC Role / Device Role / Timing Role: Single-point UV/OV monitor feeding system management controller (SMC) via shared reset bus. Use Value: Enables coordinated shutdown across dual PSUs using open-drain wired-OR topology. |
| DC-DC Converter Module | Industrial PLC I/O Power |
Use Scenario: Output voltage supervision in isolated 3.3V flyback converter for fieldbus interface cards. IC Role / Device Role / Timing Role: Direct VOUT monitoring with MR tied to watchdog timer for fail-safe restart capability. Use Value: Guarantees 100ms reset hold even if converter exhibits slow recovery due to output capacitor discharge. | Use Scenario: Monitoring 3.3V logic rail powering analog input signal conditioning circuitry in modular PLC backplanes. IC Role / Device Role / Timing Role: Immune-to-transient window detector ensuring deterministic reset during ESD or EFT events. Use Value: 300ns transient immunity prevents false resets from sub-microsecond noise spikes on noisy factory floors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar window voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBZR | Fixed 3.3V reset IC (not window); only undervoltage detection; no OV function or SET pin | Lacks overvoltage protection and adjustable window - unsuitable where rail surge must trigger reset | Select only if system requires UV-only reset and space constraints favor TI's smaller SOT-23-3 footprint |
| ADM6706ARZ-REEL7 | 3.08V reset threshold; push-pull output; no window detection; no SET or MR functionality | Provides basic reset but cannot detect overvoltage excursions or support manual reset override | Choose only for legacy designs requiring pin-compatible replacement of older ADM67xx series with no window requirement |
Compared with TLV809E33DBZR and ADM6706ARZ-REEL7, the MAX6756UKTD3+T uniquely delivers true window supervision (UV + OV), ±10% programmable window via SET, and MR-controlled reset - critical for safety-critical 3.3V rail monitoring where both brownout and overvoltage must halt processor operation.
Availability
MAX6756UKTD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, server power supplies, and DC-DC converter modules requiring stable component supply with extended temperature support and low quiescent current.
Supply support for MAX6756UKTD3+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The MAX675x series was designed specifically for robust, low-power voltage supervision in space-constrained, thermally demanding applications such as networking equipment and automotive ECUs.
FAQ
What is the exact undervoltage and overvoltage threshold for MAX6756UKTD3+T?
The MAX6756UKTD3+T has a factory-trimmed 3.3V nominal window with ±10% tolerance. Its undervoltage threshold (UVTH) is 2.97V and overvoltage threshold (OVTH) is 3.63V, specified over –40°C to +125°C. These values are guaranteed across temperature and supply voltage variations per the Electrical Characteristics table in the MAX6754–MAX6764 datasheet.
Does MAX6756UKTD3+T require an external pull-up resistor on the RESET pin?
Yes, MAX6756UKTD3+T features an open-drain RESET output and requires an external pull-up resistor to the target logic voltage (e.g., 1.8V, 3.3V, or 5V). The datasheet specifies that RESET sinks ≥100µA at VOL ≤0.3V, so the pull-up value must ensure adequate voltage rise time while meeting sink current requirements.
Can MAX6756UKTD3+T monitor voltages other than 3.3V?
No - MAX6756UKTD3+T is factory-trimmed exclusively for 3.3V nominal monitoring. The "T" suffix in the part number denotes the 3.3V variant. For other voltages (e.g., 5V, 2.5V, 1.8V), different suffixes (L, Z, W) are used, such as MAX6756UKLD3+T (5V) or MAX6756UKWD3+T (1.8V).
What is the purpose of the SET pin on MAX6756UKTD3+T, and how should it be connected?
On MAX6756UKTD3+T, the SET pin selects the window tolerance: tied to GND for ±5%, to VCC for ±10%, or biased at VCC/2 for ±15%. Since this part uses the "T" (3.3V) and "D3" (100ms timeout) suffixes, SET must be connected to VCC to enable the ±10% window (2.97V–3.63V). Leaving it floating is not permitted.
Is MAX6756UKTD3+T qualified for automotive applications?
MAX6756UKTD3+T is specified for –40°C to +125°C operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. Only /V-suffixed variants (e.g., MAX6756UKTD3+TV) are AEC-Q100 qualified. For automotive use, confirm qualification status via Analog Devices' official product page or distributor documentation before design-in.
MAX6756UKTD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6756UKTD3+T FAQ
1.How can I place an order for MAX6756UKTD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6756UKTD3+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6756UKTD3+T reliable?
The price and inventory of MAX6756UKTD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6756UKTD3+T is usually 5 days.
3.What payment methods are accepted for MAX6756UKTD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6756UKTD3+T transactions.
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4.How is shipping managed for MAX6756UKTD3+T?
MAX6756UKTD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6756UKTD3+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6756UKTD3+T?
For technical support, including MAX6756UKTD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6756UKTD3+T requirements.
6.How does Aetrix verify that MAX6756UKTD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6756UKTD3+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6756UKTD3+T meets industry standards.
7.What is the process for return or replacement of MAX6756UKTD3+T?
All MAX6756UKTD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6756UKTD3+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6756UKTD3+T part is unused and in its original packaging.
Return procedure for MAX6756UKTD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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