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Analog Devices Inc./Maxim Integrated MAX6827RUT+T
- Part No.:
- MAX6827RUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6827RUT+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,410
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Product details
Overview
MAX6827RUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, designed to monitor primary supply (VCC) at 2.85V nominal and secondary supply (VCC2) at 2.93V nominal, with push-pull active-high RESET output, manual reset input (MR), and 1.6s watchdog timeout - used in battery-powered embedded controllers requiring reliable brownout detection and system-level reset coordination.
For engineers reviewing the MAX6827RUT+T datasheet, MAX6827RUT+T pinout, MAX6827RUT+T application, or MAX6827RUT+T equivalent, key selection criteria include its guaranteed reset validity down to VCC = +1.2V, 140ms minimum reset timeout, immunity to short negative VCC transients, and factory-trimmed dual-threshold monitoring without external components.
Technical Context
The MAX6827RUT+T integrates two independent voltage comparators: one for VCC (threshold = 2.85V ±3%, temperature-compensated) and one for VCC2 (threshold = 2.93V ±3%), both feeding an OR logic gate that triggers reset assertion when either falls below threshold. Its internal 1.6s watchdog timer clears on any WDI edge and asserts reset if no transition occurs within timeout.
Reset assertion is synchronized with a 140ms minimum timeout delay generator; the push-pull RESET output drives high during reset and returns low after timeout, with VOH ≥ 0.8 × VCC at ISOURCE = 200µA. MR features a 50kΩ internal pullup and supports CMOS-logic-level manual reset initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.85V (min 2.83V, max 3.02V at -40°C to +125°C) - sets primary supply brownout detection point for 3.3V systems |
| VCC2 Threshold | 2.93V (min 2.83V, max 3.02V at -40°C to +125°C) - factory-trimmed secondary supply monitor for I/O rail supervision |
| Reset Timeout | 140ms minimum - ensures µP completes power stabilization before release from reset state |
| Watchdog Timeout | 1.6s nominal (min 1.12s, max 2.4s at -40°C to +85°C) - provides software execution monitoring with glitch rejection |
| RESET Output Type | Push-pull active-high - eliminates need for external pullup and supports direct interface to µP reset inputs requiring high-active assertion |
| Operating Voltage Range | +1.2V to +5.5V (VCC) - guarantees functional reset assertion even during deep brownout conditions |
| Supply Current | 7µA typical at VCC = +3.6V, TA = -40°C to +85°C - enables multi-year operation in coin-cell–powered portable equipment |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; drives high during reset assertion and low otherwise; compatible with µP reset inputs requiring high-active signaling |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers; must be connected to system ground plane |
| 3 | MR | Manual reset input, active-low; internally pulled up to VCC at 50kΩ; asserting low forces reset for full timeout period |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; unconnected or three-stated disables watchdog function |
| 5 | VCC2 | Secondary supply input; monitored against factory-trimmed 2.93V threshold; not adjustable |
| 6 | VCC | Primary supply input; monitored against 2.85V threshold; powers internal circuitry and defines reset timing behavior |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC (2.85V) and VCC2 (2.93V) enables multivoltage system reliability without external resistors |
| Guaranteed reset validity to VCC = +1.2V | Ensures deterministic reset behavior during severe brownout, critical for automotive and industrial power sequencing |
| 140ms minimum reset timeout | Prevents premature µP release before power rails stabilize, eliminating boot failures in low-noise embedded applications |
| 1.6s watchdog timer with edge-triggered clear | Monitors firmware liveness via WDI transitions; immune to stuck-at states due to hardware-level timeout enforcement |
| No external components required | Reduces BOM count and PCB area; eliminates resistor-divider tuning and associated temperature drift errors |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
|
Use Scenario: Coin-cell–powered handheld medical sensor with dual-rail power (3.3V core, 2.8V I/O). IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high RESET to ARM Cortex-M0 until both rails exceed thresholds and timeout expires. Use Value: Prevents corrupted memory writes during battery depletion by holding µP in reset until stable VCC and VCC2 are confirmed. |
Use Scenario: Industrial PLC module with isolated 3.3V logic and 2.8V communication interface. IC Role / Device Role / Timing Role: Primary supervisor coordinating power-up sequence and detecting undervoltage on both rails during field operation. Use Value: Eliminates need for discrete comparators and RC timers, reducing design cycle time and improving long-term voltage threshold stability. |
| Intelligent Instruments | Critical µP Monitoring |
|
Use Scenario: Portable oscilloscope with FPGA-based signal processing and analog front-end powered from separate LDOs. IC Role / Device Role / Timing Role: Ensures FPGA configuration completes only after both 2.85V and 2.93V supplies settle within tolerance. Use Value: Avoids partial configuration lockup by enforcing strict dual-rail power-good sequencing before releasing reset. |
Use Scenario: Avionics data logger requiring fail-safe restart on power anomaly. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and backup 2.8V rail while continuously verifying firmware health via WDI. Use Value: Provides hardware-enforced recovery path independent of software state, meeting DO-254 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827RUT-T | Same functionality and pinout, but leaded (SnPb) packaging instead of lead-free (+T suffix) | Used where RoHS exemption applies or legacy assembly processes require Pb-based solder | Select MAX6827RUT-T only if lead-free compliance is not required and SnPb reflow is specified in manufacturing flow |
| MAX6829RUT+T | Replaces VCC2 monitor with user-adjustable RESET IN input (0.63V threshold); no factory-trimmed VCC2 | Suitable when secondary rail voltage varies or requires custom threshold setting via resistor divider | Choose MAX6829RUT+T only if VCC2 monitoring is unnecessary and adjustable auxiliary reset is preferred over fixed dual-rail supervision |
Compared with MAX6827RUT+T, MAX6827RUT-T offers identical electrical performance but requires Pb-compatible reflow, while MAX6829RUT+T trades fixed VCC2 monitoring for flexible RESET IN adjustment - making MAX6827RUT+T optimal for systems needing guaranteed dual-rail brownout detection in lead-free production.
Availability
MAX6827RUT+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 (-40°C to +125°C) and long-lifecycle industrial programs.
Supply support for MAX6827RUT+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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on high-reliability industrial and automotive solutions.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail microprocessor supervision in space-constrained, battery-sensitive systems - delivering integrated reset, watchdog, and manual reset functions in minimal 6-pin SOT23 footprint.
FAQ
What is the exact VCC reset threshold voltage for MAX6827RUT+T?
The MAX6827RUT+T has a nominal VCC reset threshold of 2.85V, with guaranteed range of 2.83V to 3.02V over -40°C to +125°C operating temperature. This threshold is factory-trimmed and temperature-compensated to ±3% accuracy, enabling precise brownout detection for 3.3V systems without calibration.
Does MAX6827RUT+T support monitoring of a secondary voltage lower than 2.93V?
No - the MAX6827RUT+T uses a factory-trimmed VCC2 input with fixed 2.93V threshold and does not support user-adjustable secondary monitoring. For sub-2.93V secondary rail supervision, consider MAX6826/MAX6827/MAX6828 variants with RESET IN pin (0.63V threshold) or MAX6829/MAX6830/MAX6831 with VCC2 trim down to 0.788V.
What is the function of the RESET pin on MAX6827RUT+T?
The RESET pin on MAX6827RUT+T is an active-high push-pull output that drives high during reset assertion (when VCC or VCC2 drops below threshold, MR is pulled low, or watchdog times out) and returns low after the 140ms timeout expires. It interfaces directly with µP reset inputs requiring high-active signaling without external pullup.
Can MAX6827RUT+T operate reliably at VCC = +1.2V?
Yes - the MAX6827RUT+T is guaranteed to assert valid reset output down to VCC = +1.2V across -40°C to +125°C, with full functionality including VCC/VCC2 monitoring, MR response, and watchdog timing. Below +1.2V, reset behavior is not characterized per datasheet Absolute Maximum Ratings.
How does the watchdog timer in MAX6827RUT+T respond to WDI signal edges?
The MAX6827RUT+T watchdog timer clears on any rising or falling edge at WDI and begins counting anew. If no edge occurs within 1.6s (nominal), it triggers reset assertion for the full 140ms timeout. The timer remains cleared while reset is asserted and resumes counting only after reset deasserts.
MAX6827RUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.63V, 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-6
MAX6827RUT+T FAQ
1.How can I place an order for MAX6827RUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6827RUT+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 MAX6827RUT+T reliable?
The price and inventory of MAX6827RUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6827RUT+T is usually 5 days.
3.What payment methods are accepted for MAX6827RUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6827RUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6827RUT+T?
MAX6827RUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6827RUT+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 MAX6827RUT+T?
For technical support, including MAX6827RUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6827RUT+T requirements.
6.How does Aetrix verify that MAX6827RUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6827RUT+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 MAX6827RUT+T meets industry standards.
7.What is the process for return or replacement of MAX6827RUT+T?
All MAX6827RUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6827RUT+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 MAX6827RUT+T part is unused and in its original packaging.
Return procedure for MAX6827RUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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