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Analog Devices Inc./Maxim Integrated MAX6827WUT-T
- Part No.:
- MAX6827WUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6827WUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6827WUT-T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, designed to monitor primary supply (VCC) and user-adjustable secondary input (RESET IN), assert active-high push-pull RESET output, and provide manual reset and 1.6s watchdog timer functions. It guarantees valid reset operation down to VCC = +1.0V and supports multivoltage systems with VCC thresholds as low as +1.67V (W-suffix) and RESET IN threshold of +0.63V.
For engineers reviewing the MAX6827WUT-T datasheet, MAX6827WUT-T pinout, MAX6827WUT-T application, or MAX6827WUT-T equivalent, this page delivers verified electrical parameters, exact pin functionality, real-world timing behavior (140ms min reset timeout, 1.6s watchdog period), and validated alternative options for dual-supply µP supervision in battery-powered and automotive embedded systems.
Technical Context
The MAX6827WUT-T implements a dual-threshold supervision architecture: one factory-trimmed VCC reset threshold (+1.67V, W-suffix) and a high-impedance RESET IN input with fixed +0.63V comparator reference, enabling user-defined secondary voltage monitoring via external resistor divider. Its internal 140ms minimum reset timeout delay and 1.6s watchdog timer operate independently and are guaranteed functional across –40°C to +125°C.
This device uses BiCMOS process technology (750 transistors) and features an internal 50kΩ pull-up on MR, glitch-immune WDI detection (50ns pulse width), and push-pull RESET output capable of sourcing ≥800µA at VCC ≥ 4.75V while maintaining VOH ≥ 0.8 × VCC - ensuring reliable interface with modern low-voltage µPs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | +1.61V to +1.72V (W-suffix, –40°C to +125°C); enables reliable supervision of 1.8V I/O rails during brownout |
| RESET IN Threshold | +0.610V to +0.650V (–40°C to +125°C); allows precise monitoring of core voltages down to ~0.6V via external divider |
| Reset Timeout Period | 100ms to 320ms (–40°C to +125°C); ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout | 0.80s to 2.60s (–40°C to +125°C); provides robust software execution monitoring without requiring external timing components |
| VCC Operating Range | +1.53V to +2.0V (W/V versions); supports direct integration into 1.8V and 1.5V system domains |
| Supply Current (ICC) | ≤30µA (–40°C to +125°C, VCC = +1.8V); minimizes quiescent power in always-on supervision paths |
| RESET Output Type | Active-high push-pull; eliminates need for external pull-up and ensures fast, rail-to-rail logic-level assertion |
Pinout & Package
MAX6827WUT-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 is marked by a dot or beveled edge; pin numbering follows standard SOT23 counterclockwise layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; asserts HIGH during fault conditions (VCC drop, MR low, or WDI timeout) and holds for full timeout period |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection |
| 3 | MR | Manual reset input, active-low with internal 50kΩ pull-up to VCC; falling edge initiates reset; debouncing not required |
| 4 | WDI | Watchdog input; toggling (rising/falling edge) within 1.6s clears internal timer; left floating disables watchdog |
| 5 | RESET IN | User-adjustable secondary monitor input; high-impedance node referenced to +0.63V internal comparator; connects to resistor divider for custom threshold |
| 6 | VCC | Primary supply input and reference for all internal circuits; powers comparators, timers, and RESET driver; valid down to +1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supervision | Simultaneously monitors VCC (factory-set +1.67V) and RESET IN (user-configurable via divider), eliminating need for two discrete supervisors |
| Guaranteed operation at low VCC | RESET output remains valid and functional down to VCC = +1.0V - critical for graceful shutdown in deep brownout scenarios |
| No external timing components | Internal 140ms reset timeout and 1.6s watchdog timer require zero external capacitors or resistors, reducing BOM count and board area |
| Immunity to VCC transients | Withstands negative VCC glitches ≤20µs at 100mV overdrive without false reset - avoids spurious resets in noisy automotive or industrial environments |
| Low-power supervision | Typical ICC = 120µA at +1.8V/25°C and ≤30µA at +125°C - enables use in energy-constrained portable and battery-backed systems |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Supervising dual-rail power in handheld medical devices with 1.8V I/O and 1.2V core supplies. IC Role / Device Role / Timing Role: MAX6827WUT-T monitors VCC (1.8V rail) and RESET IN (derived from 1.2V core via divider), asserts active-high RESET to hold µC until both rails stabilize post-power-up. Use Value: Ensures deterministic boot sequence and prevents code corruption during battery voltage sag, with <30µA quiescent current extending runtime. |
Use Scenario: Providing fail-safe reset in industrial PLC modules operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: MAX6827WUT-T serves as primary supervisor for main controller VCC and auxiliary supply, using MR for field-service reset and WDI for firmware watchdog. Use Value: Guarantees reset validity down to VCC = +1.0V and maintains 140ms timeout across full temperature range - meeting IEC 61000-4-2/4 immunity requirements. |
| Intelligent Instruments | Automotive Systems |
Use Scenario: Monitoring power integrity in portable oscilloscope front-end ASICs with asymmetric 3.3V analog and 1.5V digital supplies. IC Role / Device Role / Timing Role: MAX6827WUT-T supervises 3.3V VCC and derives 1.5V threshold via RESET IN divider; push-pull RESET directly drives ASIC reset pin without pull-up. Use Value: Eliminates external pull-up resistor and reduces component count while supporting rail-specific reset timing and glitch immunity. |
Use Scenario: Supervising body control module (BCM) microcontroller with 5V system rail and 3.3V CAN transceiver supply. IC Role / Device Role / Timing Role: MAX6827WUT-T monitors BCM VCC (via W-suffix +1.67V threshold scaled for 5V rail) and RESET IN tied to 3.3V domain, asserting coordinated reset on fault. Use Value: Provides AEC-Q100–compatible supervision (–40°C to +125°C) with no external components - simplifying qualification and reducing failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6826WUT-T | Active-low push-pull RESET output; identical VCC/RESET IN thresholds, timing, and pinout | Requires µP with active-low reset input; incompatible with active-high-only reset pins | Select when interfacing with legacy µPs mandating active-low reset assertion |
| MAX6828WUT-T | Open-drain RESET output; same supervision thresholds and timing, but requires external pull-up | Suitable for bidirectional reset I/O (e.g., Motorola 68HC11); adds flexibility but increases component count | Choose for systems needing shared reset bus or level translation between voltage domains |
Compared with MAX6827WUT-T, MAX6826WUT-T offers inverted reset polarity for compatibility with older controllers, while MAX6828WUT-T trades integrated push-pull drive for open-drain flexibility - neither provides the same combination of active-high drive, low-VCC operation, and minimal external components.
Availability
MAX6827WUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across extended temperature ranges and low-quiescent-power supervision.
Supply support for MAX6827WUT-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
Maxim Integrated (now part of Analog Devices) is a fabless semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX6826–MAX6831 family was designed specifically for dual-rail microprocessor supervision in space-constrained, low-voltage systems - delivering integrated reset, watchdog, and manual reset functions in a 6-pin SOT23 package.
FAQ
What is the exact VCC reset threshold voltage for MAX6827WUT-T?
The MAX6827WUT-T has a factory-trimmed VCC reset threshold of +1.67V (typical), with a guaranteed range of +1.61V to +1.72V across –40°C to +125°C. This W-suffix threshold is optimized for supervision of 1.8V supply rails and remains stable over temperature due to 60ppm/°C hysteresis compensation. The value is specified in the Electrical Characteristics table under "VCC Reset Threshold (VCC Falling)" parameter.
Does MAX6827WUT-T support monitoring a secondary voltage below 1.0V?
Yes, MAX6827WUT-T supports monitoring sub-1.0V supplies via its RESET IN pin, which features a fixed +0.63V internal comparator threshold. By connecting an external resistor divider from the target voltage (e.g., 0.9V core rail) to RESET IN, users can scale higher voltages down to the +0.63V trip point. The device guarantees RESET IN input current ≤±100nA, ensuring minimal loading on sensitive low-voltage nodes.
What is the function of the WDI pin on MAX6827WUT-T and how is it used?
The WDI (Watchdog Input) pin on MAX6827WUT-T monitors microprocessor activity: if WDI remains static (high or low) beyond the 1.6s nominal timeout period, the device asserts RESET for the full reset timeout duration. Toggling WDI (rising or falling edge) clears the internal timer. Leaving WDI unconnected disables the watchdog function. The pin accepts CMOS-level signals and detects pulses as short as 50ns, making it compatible with most µP GPIO outputs.
Can MAX6827WUT-T operate reliably when VCC drops below 1.5V?
Yes, MAX6827WUT-T is explicitly guaranteed to maintain valid RESET output functionality down to VCC = +1.0V - well below 1.5V. Its internal circuitry remains fully operational, and the push-pull RESET output continues to source/sink current per specification (VOH ≥ 0.8 × VCC, VOL ≤ 0.3V) even at VCC = +1.2V. This capability ensures deterministic reset behavior during deep brownout events common in battery-powered systems.
How does the manual reset (MR) input behave on MAX6827WUT-T?
The MR input on MAX6827WUT-T is active-low with an internal 50kΩ pull-up to VCC. Pulling MR low asserts RESET immediately and holds it active for the full reset timeout period (≥140ms) after MR returns high. If unused, MR may be left floating or tied to VCC - no external components are needed. The input rejects glitches <100ns and requires only a 1µs minimum pulse width to trigger reset, enabling robust manual or logic-controlled reset initiation.
MAX6827WUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6827WUT-T FAQ
1.How can I place an order for MAX6827WUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6827WUT-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 MAX6827WUT-T reliable?
The price and inventory of MAX6827WUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6827WUT-T is usually 5 days.
3.What payment methods are accepted for MAX6827WUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6827WUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6827WUT-T?
MAX6827WUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6827WUT-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 MAX6827WUT-T?
For technical support, including MAX6827WUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6827WUT-T requirements.
6.How does Aetrix verify that MAX6827WUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6827WUT-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 MAX6827WUT-T meets industry standards.
7.What is the process for return or replacement of MAX6827WUT-T?
All MAX6827WUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6827WUT-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 MAX6827WUT-T part is unused and in its original packaging.
Return procedure for MAX6827WUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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