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Analog Devices Inc./Maxim Integrated MAX6829RFUT+T
- Part No.:
- MAX6829RFUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829RFUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:19,380
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Product details
Overview
MAX6829RFUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, designed to monitor primary supply (VCC) at 2.55V and secondary supply (VCC2) at 2.313V with ±0.037V tolerance over –40°C to +125°C, assert active-low push-pull RESET on fault, and support manual reset and 1.6s watchdog timeout - used in portable battery-powered equipment for reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6829RFUT+T datasheet, MAX6829RFUT+T pinout, MAX6829RFUT+T application, or MAX6829RFUT+T equivalent, key selection criteria include guaranteed reset validity down to VCC = +1.2V, factory-trimmed dual-threshold monitoring, immunity to sub-20µs negative VCC transients, and compatibility with multivoltage embedded systems requiring stable reset assertion during supply ramping.
Technical Context
The MAX6829RFUT+T integrates two independent voltage comparators: one monitors VCC against a fixed 2.55V threshold (R suffix), the other monitors VCC2 against a factory-trimmed 2.313V threshold (Z suffix), both with 60ppm/°C temperature coefficient and 2×VTH hysteresis. It features an internal 1.6s watchdog timer cleared by WDI edge transitions and a 140ms minimum reset timeout delay after recovery.
Its push-pull RESET output drives low (≤0.3V at 50µA) when triggered and returns high (≥0.8×VCC) when released; MR input includes a 50kΩ internal pullup and accepts CMOS-level signals; WDI tolerates 50ns pulses and draws ≤160µA when driven high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.55V nominal, ±0.037V over –40°C to +125°C - ensures precise detection of 2.5V system rail collapse |
| VCC2 Threshold | 2.313V nominal, ±0.037V over –40°C to +125°C - factory-trimmed for accurate 2.3V auxiliary rail monitoring |
| Reset Timeout | 140ms minimum - guarantees µP remains held in reset long enough for full power stabilization |
| Watchdog Period | 1.6s nominal, 0.8–2.6s over temperature - provides robust software execution supervision without false triggers |
| Operating Voltage | +1.2V to +5.5V on VCC - enables operation across wide battery discharge range including Li-ion and coin-cell systems |
| Supply Current | 25µA max at –40°C to +125°C, VCC = +3.6V - supports multi-year battery life in always-on portable instrumentation |
| RESET Output Type | Active-low push-pull - eliminates external pullup resistor and ensures fast, deterministic release timing |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free construction (indicated by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC/VCC2 undervoltage, MR low, or WDI timeout |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Manual reset input, active-low, internally pulled up to VCC at 50kΩ - debounced by design, no external RC needed |
| 4 | WDI | Watchdog input; edge-sensitive (50ns min pulse); resets internal 1.6s timer on rising/falling transition |
| 5 | VCC2 | Secondary supply input; connected directly to 2.313V monitored rail - no external divider required |
| 6 | VCC | Primary supply input; powers device and sets 2.55V reset threshold - valid operation down to +1.2V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC (2.55V) and VCC2 (2.313V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity to VCC = +1.2V | Ensures functional reset assertion even during deep brownout conditions common in battery-powered systems |
| No external components required | Factory-trimmed thresholds, internal MR pullup, and integrated watchdog eliminate discrete resistors/capacitors |
| Immunity to short VCC transients | Withstands ≤20µs negative-going glitches down to 100mV below threshold without spurious reset assertion |
| 140ms minimum reset timeout | Prevents premature µP release before power rails settle - critical for flash programming and PLL lock sequences |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld medical meters powered by single-cell Li-ion batteries experiencing voltage sag under load. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RESET during VCC drop below 2.55V and VCC2 drop below 2.313V, with 140ms hold time. Use Value: Prevents corrupted EEPROM writes and sensor initialization failures during transient brownouts. |
Use Scenario: Industrial PLC controller board with separate 2.5V I/O rail and 3.3V core rail. IC Role / Device Role / Timing Role: Monitors both rails independently; triggers synchronized reset if either falls out of spec. Use Value: Eliminates partial initialization states that cause communication lockups or watchdog timeouts. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable oscilloscope with FPGA-based signal processing and analog front-end powered from multiple LDOs. IC Role / Device Role / Timing Role: Ensures FPGA configuration completes only after both 2.5V analog supply and 1.2V core supply are stable. Use Value: Avoids metastability and logic errors caused by asynchronous power-up sequencing. |
Use Scenario: Automotive-grade data logger using ARM Cortex-M4 with strict boot integrity requirements. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation and 1.6s watchdog supervision of firmware execution flow. Use Value: Detects stuck loops or memory corruption before safety-critical control outputs become invalid. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830RFUT+T | Active-high push-pull RESET output instead of active-low; identical VCC/VCC2 thresholds and timing | Required where host µP reset pin is active-high or requires level inversion | Select MAX6830RFUT+T only when system-level reset polarity mandates high-asserted signaling |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), no VCC2 input; 200ms reset timeout; 3.3V fixed threshold, no factory-trimmed secondary rail | Suitable only for single-rail systems; lacks dual-monitoring capability and adjustable secondary threshold | Choose TPS3808G33DBVR only when monitoring only one supply and 3.3V threshold suffices |
Compared with MAX6829RFUT+T, MAX6830RFUT+T offers identical dual-threshold accuracy but inverted reset polarity, while TPS3808G33DBVR reduces cost and footprint in single-rail designs but sacrifices the critical 2.313V VCC2 monitoring capability essential for multivoltage SoC platforms.
Availability
MAX6829RFUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, critical µP monitoring, and multivoltage systems requiring stable component supply across industrial temperature ranges.
Supply support for MAX6829RFUT+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 in industrial, automotive, and computing markets.
The MAX6826–MAX6831 product line delivers ultra-low-voltage dual-supply supervisors optimized for battery-constrained and multirail embedded systems requiring guaranteed reset behavior down to 1.2V and factory-trimmed secondary rail monitoring.
FAQ
What is the exact VCC and VCC2 reset threshold voltage for MAX6829RFUT+T?
The MAX6829RFUT+T has a VCC reset threshold of 2.55V (R suffix) and a VCC2 reset threshold of 2.313V (Z suffix), both factory-trimmed and specified over –40°C to +125°C with ±0.037V tolerance. These values are confirmed in the Electrical Characteristics table of the MAX6826–MAX6831 datasheet, and the MAX6829RFUT+T part number explicitly encodes R (2.55V) and Z (2.313V) in its ordering code.
Does MAX6829RFUT+T support manual reset and watchdog functionality?
Yes, MAX6829RFUT+T fully supports both manual reset and watchdog functions. Its MR pin is active-low with internal 50kΩ pullup, and its WDI pin accepts 50ns minimum pulses to clear the 1.6s watchdog timer. The device asserts RESET if WDI remains static beyond the timeout period, and maintains reset for 140ms minimum after recovery - all confirmed in the Pin Description and Functional Diagram sections of the datasheet.
What is the operating temperature range and supply voltage range for MAX6829RFUT+T?
MAX6829RFUT+T operates from –40°C to +125°C and supports VCC supply voltages from +1.2V to +5.5V. This extended range is guaranteed per Absolute Maximum Ratings and Electrical Characteristics tables, enabling use in harsh environments such as automotive under-hood modules or industrial motor drives where thermal stability is critical.
Is MAX6829RFUT+T pin-compatible with other devices in the MAX6826–MAX6831 family?
Yes, MAX6829RFUT+T shares the same 6-pin SOT23 package (U6+1 outline) and pinout as all MAX6826–MAX6831 variants, including identical assignments for VCC, GND, MR, WDI, VCC2, and RESET. However, RESET polarity and VCC2 functionality differ across the family - MAX6829RFUT+T uses active-low push-pull RESET and dedicated VCC2 input, unlike MAX6826/MAX6827/MAX6828 which use RESET IN instead.
What is the reset timeout duration and watchdog timeout period for MAX6829RFUT+T?
MAX6829RFUT+T provides a minimum reset timeout period of 140ms and a nominal watchdog timeout period of 1.6s (ranging from 0.8s to 2.6s over temperature). These values are explicitly listed in the Electrical Characteristics table under "Reset Timeout Period" (tRP) and "Watchdog Timeout Period" (tWD), and are integral to its role in ensuring reliable µP initialization and software execution supervision.
MAX6829RFUT+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:
- 1.05V, 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6829RFUT+T FAQ
1.How can I place an order for MAX6829RFUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829RFUT+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 MAX6829RFUT+T reliable?
The price and inventory of MAX6829RFUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829RFUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829RFUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829RFUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829RFUT+T?
MAX6829RFUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829RFUT+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 MAX6829RFUT+T?
For technical support, including MAX6829RFUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829RFUT+T requirements.
6.How does Aetrix verify that MAX6829RFUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829RFUT+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 MAX6829RFUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829RFUT+T?
All MAX6829RFUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829RFUT+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 MAX6829RFUT+T part is unused and in its original packaging.
Return procedure for MAX6829RFUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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