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Analog Devices Inc./Maxim Integrated MAX6829TWUT+T
- Part No.:
- MAX6829TWUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829TWUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MAX6829TWUT+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 3.08V threshold and secondary supply (VCC2) at 2.313V threshold, with manual reset input, watchdog timer (1.6s timeout), and active-low push-pull RESET output. It ensures reliable system reset during power-up, brownout, and software fault conditions in battery-powered embedded systems.
For engineers reviewing the MAX6829TWUT+T datasheet, MAX6829TWUT+T pinout, MAX6829TWUT+T application, or MAX6829TWUT+T equivalent, this page delivers verified electrical parameters, confirmed pin functions, real-world use scenarios for multivoltage monitoring, and validated alternative parts with documented functional differences.
Technical Context
The MAX6829TWUT+T integrates two independent voltage monitors: one factory-trimmed for VCC (3.08V ±3% over -40°C to +125°C) and another for VCC2 (2.313V ±3% over same range), both asserting reset when either supply falls below its threshold. It features a 1.6s watchdog timer cleared by WDI edge transitions and a 140ms minimum reset timeout period after recovery.
Its push-pull RESET output drives low during fault conditions and returns high after timeout; MR input includes internal 50kΩ pullup and supports CMOS-level manual reset triggering; VCC2 pin is dedicated-no user-adjustable RESET IN function as found in MAX6826–MAX6828 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V (±3% over -40°C to +125°C); ensures reliable detection of 3.3V rail brownout before µP malfunction |
| VCC2 Reset Threshold | 2.313V (±3% over -40°C to +125°C); factory-trimmed for precise monitoring of 2.5V auxiliary supply |
| Reset Timeout Period | 140ms minimum; guarantees sufficient hold time for µP initialization and memory stabilization |
| Watchdog Timeout Period | 1.6s nominal (0.8s–2.6s over temperature); provides robust software execution supervision without false triggers |
| Operating Voltage Range | 1.2V to 5.5V on VCC; enables operation down to ultralow-power states while maintaining reset validity |
| RESET Output Type | Active-low push-pull; eliminates external pullup resistor and supports direct interface to µP reset pins |
| Supply Current (VCC = 3.6V) | 7µA typical, 25µA max at -40°C to +125°C; minimizes quiescent drain in battery-critical applications |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free (+T suffix), -40°C to +125°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives low during VCC/VCC2 undervoltage, MR assertion, or watchdog timeout; returns high after 140ms timeout |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output stage; must be low-impedance |
| 3 - MR | Manual reset input (active-low) | Pulled up internally to VCC via 50kΩ; asserts reset when pulled ≤0.3×VCC; debounced by internal timing |
| 4 - WDI | Watchdog input | Edge-sensitive; reset triggered if no transition occurs within 1.6s; disabled when left floating or three-stated |
| 5 - VCC2 | Secondary supply monitor input | Factory-trimmed comparator input for fixed 2.313V threshold; connects directly to 2.5V rail |
| 6 - VCC | Primary supply monitor input | Factory-trimmed comparator input for fixed 3.08V threshold; powers internal circuitry and sets logic levels |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of 3.3V (VCC) and 2.5V (VCC2) rails with separate thresholds and hysteresis |
| Guaranteed reset validity down to VCC = 1.2V | Ensures correct reset assertion even during deep brownout-no undefined output states |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches down to 100mV below threshold without spurious reset generation |
| No external components required | Integrates precision references, comparators, watchdog timer, and push-pull driver-zero external passives |
| Factory-trimmed thresholds | Eliminates calibration overhead: VCC = 3.08V ±3%, VCC2 = 2.313V ±3% across full temperature range |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
|
Use Scenario: Power management in handheld medical devices with dual-rail Li-ion battery system (3.3V I/O + 2.5V sensor core). IC Role / Device Role / Timing Role: Supervises both rails independently; asserts RESET within 20µs of VCC drop below 3.08V or VCC2 below 2.313V. Use Value: Prevents firmware corruption during battery sag by guaranteeing 140ms reset hold time while enabling <25µA quiescent current. |
Use Scenario: Industrial PLC module requiring deterministic restart after brownout in remote field deployments. IC Role / Device Role / Timing Role: Monitors main 3.3V controller supply and 2.5V FPGA configuration rail; triggers watchdog reset if firmware hangs. Use Value: 1.6s watchdog timeout prevents lockup without requiring host µP intervention; push-pull RESET ensures clean release. |
| Intelligent Instruments | Critical µP Monitoring |
|
Use Scenario: Precision digital multimeter with isolated analog front-end powered from 2.5V LDO and digital section from 3.3V rail. IC Role / Device Role / Timing Role: Detects undervoltage on either rail and holds µP in reset until both supplies stabilize above thresholds. Use Value: Eliminates measurement errors caused by marginal supply conditions; factory-trimmed thresholds ensure ±3% accuracy without calibration. |
Use Scenario: Automotive-grade telematics unit where µP reset integrity is mandated for ASIL-B compliance. IC Role / Device Role / Timing Role: Primary supervisor for safety-critical boot sequence; validates VCC ≥3.08V and VCC2 ≥2.313V before releasing reset. Use Value: Guaranteed operation down to VCC = 1.2V and immunity to 20µs transients meet automotive EMC requirements per ISO 7637-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830TWUT+T | Active-high push-pull RESET output; identical VCC/VCC2 thresholds and watchdog timing | Required when host µP expects active-high reset assertion (e.g., certain ARM Cortex-M boot sequences) | Select when system architecture mandates high-true reset signaling rather than low-true |
| MAX6829TTUT+T | Same functionality but with 3.00V VCC threshold (±3%) and 2.244V VCC2 threshold (±3%) | Better suited for 3.0V nominal systems with tighter tolerance margins on 2.25V auxiliary rail | Choose for designs using 3.0V main supply and 2.25V secondary supply where tighter threshold matching is critical |
Compared with MAX6829TWUT+T, MAX6830TWUT+T changes reset polarity but preserves all monitoring and timing behavior, while MAX6829TTUT+T shifts both thresholds downward by ~2.6% to match lower nominal supply voltages-neither is pin-compatible with alternate reset types or threshold variants.
Availability
MAX6829TWUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply with guaranteed long-term availability and full temperature-range validation.
Supply support for MAX6829TWUT+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 demanding industrial, automotive, and computing applications, with emphasis on reliability, low power, and integration.
The MAX6826–MAX6831 family was engineered specifically for dual-rail microprocessor supervision in space-constrained, battery-sensitive systems-delivering factory-trimmed accuracy, wide temperature operation, and zero external components.
FAQ
What is the exact VCC reset threshold voltage for MAX6829TWUT+T?
The MAX6829TWUT+T has a factory-trimmed VCC reset threshold of 3.08V, with guaranteed tolerance of ±3% over the full operating temperature range (-40°C to +125°C). This value is specified in the Electrical Characteristics table under "VCC Reset Threshold" for suffix 'T', and applies to the primary supply monitoring function of the MAX6829TWUT+T.
Does MAX6829TWUT+T support user-adjustable secondary voltage monitoring?
No, the MAX6829TWUT+T does not support user-adjustable secondary monitoring. It uses a dedicated VCC2 pin with a fixed 2.313V factory-trimmed threshold. Unlike MAX6826–MAX6828 variants, it lacks the RESET IN pin and associated internal 0.63V reference needed for resistor-divider-based threshold programming-this functionality is absent in the MAX6829TWUT+T.
What is the watchdog timeout period specification for MAX6829TWUT+T?
The MAX6829TWUT+T watchdog timeout period is 1.6s nominal, with a guaranteed range of 0.80s to 2.60s over the full -40°C to +125°C temperature range. This parameter is measured from the last WDI edge until reset assertion and is fully characterized in the Electrical Characteristics table under "Watchdog Timeout Period" for the MAX6829TWUT+T.
Is MAX6829TWUT+T pin-compatible with MAX6826–MAX6828 series devices?
No, the MAX6829TWUT+T is not pin-compatible with MAX6826–MAX6828. While all share the 6-pin SOT23 package, pin 5 is VCC2 (fixed monitor) in MAX6829TWUT+T but RESET IN (adjustable monitor) in MAX6826–MAX6828. Swapping them would connect the wrong signal to pin 5, causing incorrect or failed supervision-pin mapping differs between these families.
What is the maximum operating temperature range supported by MAX6829TWUT+T?
The MAX6829TWUT+T is rated for continuous operation from -40°C to +125°C ambient temperature, as confirmed in the Ordering Information table and Absolute Maximum Ratings section. All key specifications-including reset thresholds, timeout periods, and supply current-are guaranteed across this full industrial temperature range, making the MAX6829TWUT+T suitable for harsh-environment applications.
MAX6829TWUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.665V, 3.08V
- 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
MAX6829TWUT+T FAQ
1.How can I place an order for MAX6829TWUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829TWUT+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 MAX6829TWUT+T reliable?
The price and inventory of MAX6829TWUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829TWUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829TWUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829TWUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829TWUT+T?
MAX6829TWUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829TWUT+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 MAX6829TWUT+T?
For technical support, including MAX6829TWUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829TWUT+T requirements.
6.How does Aetrix verify that MAX6829TWUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829TWUT+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 MAX6829TWUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829TWUT+T?
All MAX6829TWUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829TWUT+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 MAX6829TWUT+T part is unused and in its original packaging.
Return procedure for MAX6829TWUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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