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Analog Devices Inc./Maxim Integrated MAX6827RUT
- Part No.:
- MAX6827RUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6827RUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,288
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Product details
Overview
MAX6827RUT from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring primary supply (VCC) and user-adjustable secondary input (RESET IN), asserting active-high push-pull RESET upon threshold violation, manual reset, or watchdog timeout. It operates down to VCC = +1.0V, features 140ms min reset timeout, 1.6s watchdog period, and supports portable, automotive, and multivoltage embedded systems.
For engineers reviewing the MAX6827RUT datasheet, MAX6827RUT pinout, MAX6827RUT application, or MAX6827RUT equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-supply monitoring capability, exact reset timing behavior, and real-world substitution guidance for industrial and battery-powered designs.
Technical Context
The MAX6827RUT implements independent voltage monitoring of VCC (programmable threshold from 1.05V to 4.78V per suffix) and RESET IN (typical 0.63V threshold, user-adjustable via resistor divider). Its internal reset timeout delay generator ensures minimum 140ms assertion after recovery, while the watchdog timer triggers reset if WDI remains static beyond 1.6s nominal.
It uses BiCMOS process with 750 transistors, includes internal 50kΩ MR pullup, guarantees valid RESET output down to VCC = +1.0V, and rejects short negative VCC transients - enabling robust operation during brownout and power-up sequencing in safety-critical embedded controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | +1.2V to +5.5V - supports wide primary supply range including 1.8V, 2.5V, 3.3V, and 5V systems |
| RESET IN Threshold | 0.610V to 0.650V - enables precise monitoring of low-voltage rails down to +0.63V via external resistor divider |
| Reset Timeout Period | 100ms to 320ms - ensures sufficient processor initialization time before release, with guaranteed minimum 140ms |
| Watchdog Timeout | 0.80s to 2.60s - provides configurable software execution supervision with nominal 1.6s window |
| MR Input Pullup | 25kΩ to 75kΩ - eliminates need for external pullup; allows direct switch-to-GND manual reset without debounce |
| RESET Output Type | Active-high push-pull - drives high during normal operation, asserts low only during reset; compatible with µP reset inputs requiring active-low logic |
| VCC Supply Current | 7µA to 30µA - ultra-low quiescent current enables long battery life in portable equipment |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, lead pitch 0.95mm, gull-wing leads. RoHS-compliant, available in leaded and lead-free variants (suffix "+T" denotes lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output - asserts low during fault condition; sinks 3.2mA at VCC ≥ 4.25V, VOL ≤ 0.4V |
| 2 | GND | Ground reference - common return path for all internal comparators, timers, and output drivers |
| 3 | MR | Manual reset input - active-low, internally pulled up to VCC (50kΩ); 200ns response, 100ns glitch rejection |
| 4 | WDI | Watchdog input - detects rising/falling edges; resets internal 1.6s timer on transition; disabled when floating or three-stated |
| 5 | RESET IN | User-adjustable monitor input - high-impedance comparator input (≤100nA bias) with 0.63V typical trip point |
| 6 | VCC | Primary supply input - powers internal circuitry and defines operating voltage range; reset valid down to +1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (1.05V–4.78V) and RESET IN (adjustable down to 0.63V), eliminating need for discrete comparators |
| Guaranteed reset validity at low VCC | Functions correctly with VCC as low as +1.0V - ensures reliable reset assertion during deep brownout conditions |
| No external components required | Integrates pullup resistor on MR, precision voltage references, timeout timers, and watchdog logic - reduces BOM count and PCB area |
| Immunity to VCC transients | Rejects negative VCC glitches ≤20µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Configurable reset polarity and drive | Push-pull active-high RESET output enables direct interface with µPs requiring active-low reset via simple inversion or logic gate |
Applications
| Portable Power Management | Automotive Body Control Module |
|---|---|
Use Scenario: Battery-powered handheld instrument with 1.8V core and 3.3V I/O rails, requiring fail-safe boot sequence under fluctuating Li-ion voltage. IC Role / Device Role / Timing Role: Dual-supply supervisor monitors both rails and asserts reset until both stabilize above thresholds, then holds reset for ≥140ms to ensure MCU firmware load completion. Use Value: Prevents corrupted startup due to asymmetric rail ramp-up; eliminates need for discrete RC reset circuits and saves 2.5mm² PCB area. |
Use Scenario: 12V automotive system with local 5V/3.3V regulators powering CAN controller and sensor interface ICs. IC Role / Device Role / Timing Role: Supervises 5V main supply and 3.3V secondary rail; integrates manual reset for service mode and watchdog for firmware hang detection. Use Value: Meets AEC-Q100 Grade 2 temperature range (-40°C to +125°C); withstands load-dump transients via inherent VCC glitch immunity. |
| Industrial PLC I/O Module | Multivoltage FPGA Configuration |
Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V input, 5V logic, and 1.2V FPGA core supplies. IC Role / Device Role / Timing Role: Monitors 5V logic rail and user-adjusted 1.2V core rail via resistor divider on RESET IN; provides reset coordination across domains. Use Value: Enables single-chip supervision of nonstandard low-voltage rails without custom reference design; supports <100µA standby current target. |
Use Scenario: High-reliability FPGA-based data acquisition board using 2.5V configuration bank and 1.0V core bank. IC Role / Device Role / Timing Role: Uses RESET IN pin to monitor 1.0V core rail (via R1/R2 divider), while VCC monitors 2.5V config rail; asserts synchronized reset on either fault. Use Value: Guarantees FPGA enters known state before configuration begins; avoids partial bitstream loading caused by premature release. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6826RUT | Active-low push-pull RESET output; identical VCC/RESET IN monitoring, timing, and package | Requires inverted reset logic or external inverter for µPs expecting active-low reset signal | Select when system architecture mandates active-low reset assertion without additional logic |
| TLV803EB29DBVR | Single-supply supervisor (monitors only VCC); fixed 2.93V threshold; no watchdog or manual reset input | Lacks dual-monitoring, watchdog, and MR functionality - suitable only for basic power-on reset in cost-sensitive designs | Choose only for simplified single-rail applications where secondary monitoring and supervision features are unnecessary |
Compared with MAX6827RUT, MAX6826RUT offers identical supervision accuracy and timing but differs in reset polarity, while TLV803EB29DBVR sacrifices dual monitoring, watchdog, and manual reset to reduce cost and complexity - making it unsuitable for systems requiring coordinated multirail reset or firmware supervision.
Availability
MAX6827RUT is available at Aetrix Electronics and suitable for portable/battery-powered equipment, automotive systems, and multivoltage embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6827RUT 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX6826–MAX6831 family was designed specifically for ultra-low-voltage dual-rail microprocessor supervision in space-constrained, battery-sensitive systems - delivering integrated reset, watchdog, and manual reset functionality in a 6-pin SOT23 package.
FAQ
What is the exact reset output behavior of the MAX6827RUT?
The MAX6827RUT features an active-high push-pull RESET output. During normal operation, RESET is driven high (VOH ≥ 0.8 × VCC). When VCC drops below its programmed threshold, RESET IN falls below 0.63V, MR is pulled low, or the watchdog times out, RESET is actively driven low (VOL ≤ 0.4V at VCC ≥ 4.25V, ISINK = 3.2mA). The MAX6827RUT maintains RESET low for a minimum of 140ms after all monitored conditions recover.
How do I configure the MAX6827RUT to monitor a 1.2V supply on the RESET IN pin?
To monitor a 1.2V supply using the MAX6827RUT RESET IN pin, connect a resistor divider between the 1.2V rail and GND, with the divider's midpoint connected to pin 5 (RESET IN). Select R1 and R2 such that VRSTIN = 1.2V × [R2/(R1+R2)] ≈ 0.63V - for example, R1 = 100kΩ and R2 = 110kΩ yields ~0.63V. The MAX6827RUT's high-impedance input (≤100nA) ensures minimal loading on the divider network.
Does the MAX6827RUT support operation at -40°C to +125°C?
Yes, the MAX6827RUT is fully specified and guaranteed to operate across the industrial temperature range of -40°C to +125°C. All key parameters - including reset thresholds, timeout periods, supply current, and input/output voltage levels - are tested and characterized over this full range, making the MAX6827RUT suitable for under-hood automotive and harsh-environment industrial applications.
Can the watchdog function of the MAX6827RUT be disabled?
Yes, the watchdog function of the MAX6827RUT is automatically disabled when the WDI pin (pin 4) is left unconnected or driven by a three-stated buffer. In this state, the internal watchdog timer is continuously cleared by an internal pulse every ~1.4s, preventing unintended reset assertion. No external components or configuration bits are required to disable the watchdog feature.
What is the minimum VCC voltage at which the MAX6827RUT guarantees correct reset assertion?
The MAX6827RUT guarantees correct reset assertion and valid output states down to VCC = +1.0V across the full operating temperature range (-40°C to +125°C). This ensures reliable brownout detection and reset hold-off even as the primary supply collapses - a critical capability for maintaining system integrity in battery-depleted or failing power conditions.
MAX6827RUT 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:
- 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-23-6
MAX6827RUT FAQ
1.How can I place an order for MAX6827RUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6827RUT 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 reliable?
The price and inventory of MAX6827RUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6827RUT is usually 5 days.
3.What payment methods are accepted for MAX6827RUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6827RUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6827RUT?
MAX6827RUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6827RUT 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?
For technical support, including MAX6827RUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6827RUT requirements.
6.How does Aetrix verify that MAX6827RUT is sourced from the original manufacturer or authorized distributors?
All MAX6827RUT 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 meets industry standards.
7.What is the process for return or replacement of MAX6827RUT?
All MAX6827RUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6827RUT, 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 part is unused and in its original packaging.
Return procedure for MAX6827RUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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