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Analog Devices Inc./Maxim Integrated MAX6829VFUT+T
- Part No.:
- MAX6829VFUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829VFUT+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,182
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Product details
Overview
MAX6829VFUT+T from Maxim Integrated is an ultra-low-voltage dual-supply microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (1.53V–2.0V range) and secondary VCC2 (1.575V threshold) with active-low push-pull RESET output, manual reset input (MR), and watchdog timer (1.6s timeout). It guarantees valid reset assertion down to VCC = +1.0V and supports critical µP monitoring in battery-powered embedded systems.
For engineers reviewing the MAX6829VFUT+T datasheet, MAX6829VFUT+T pinout, MAX6829VFUT+T application, or MAX6829VFUT+T equivalent, this page delivers verified electrical parameters, exact pin functions, confirmed dual-threshold supervision behavior, and real-world design implications for brownout protection, watchdog timing, and low-voltage system reset integrity.
Technical Context
The MAX6829VFUT+T implements a dual-comparator architecture: one factory-trimmed comparator monitors VCC against a +1.58V threshold (±0.05V over –40°C to +125°C), and a second comparator monitors VCC2 against a +1.575V threshold (±0.054V). Reset assertion occurs when either supply falls below its threshold, MR is pulled low, or WDI remains static beyond 1.6s.
It features a 140ms minimum reset timeout delay, internal 50kΩ MR pullup, and immunity to negative VCC transients ≤20µs at 100mV overdrive. The push-pull RESET output drives low to 0.3V at 50µA sink current and sources ≥0.8×VCC when high, enabling direct interface with 1.8V/2.5V µP reset inputs without external pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | +1.53V to +2.0V - supports core supplies of ultra-low-power MCUs and SoCs. |
| VCC Reset Threshold | +1.575V (typ), ±0.05V over –40°C to +125°C - factory-trimmed for stable brownout detection at 1.6V-class rails. |
| VCC2 Reset Threshold | +1.575V (typ), ±0.054V over –40°C to +125°C - dedicated secondary monitor for I/O or auxiliary rail. |
| Reset Timeout Period | 140ms (min), 200ms (typ), 280ms (max) - ensures sufficient hold time for full µP initialization after power recovery. |
| Watchdog Timeout | 1.6s (nominal), 0.8s–2.6s over temperature - provides robust software execution monitoring without excessive timeout latency. |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor; compatible with standard µP reset pins requiring active-low assertion. |
| Supply Current (ICC) | 25µA max at +1.8V, –40°C to +125°C - enables multi-year battery life in portable equipment. |
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 | Asserts low during VCC/VCC2 undervoltage, MR activation, or watchdog timeout; holds low for ≥140ms after recovery. |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output stage; must be low-impedance for noise immunity. |
| 3 - MR | Manual reset input (active-low) | Pulled up internally to VCC via 50kΩ; asserts reset when pulled to GND; debounced by internal timing, no external RC needed. |
| 4 - WDI | Watchdog input | Clears 1.6s timer on rising/falling edge; disabled if left floating or three-stated; accepts CMOS-level pulses ≥50ns wide. |
| 5 - VCC2 | Secondary supply monitor input | Direct connection point for +1.575V-rail monitoring; no external components required; referenced to GND. |
| 6 - VCC | Primary supply input and bias source | Supplies internal circuitry and powers MR/WDI/RSTIN comparators; defines logic thresholds and output drive levels. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (1.53V–2.0V) and VCC2 (1.575V fixed) with separate comparators and hysteresis. |
| Guaranteed operation down to VCC = +1.0V | Ensures reliable reset assertion even during deep brownout conditions before system power collapse. |
| No external components required | Factory-trimmed thresholds, internal MR pullup, and integrated watchdog eliminate discrete resistors, capacitors, or timers. |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches at 100mV below threshold without false reset-critical for noisy DC-DC environments. |
| 140ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for µP initialization hold time across full temperature range. |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Wearable health monitor powered by single Li-ion cell with 1.8V MCU core and 1.5V sensor rail. IC Role / Device Role: Dual-supply supervisor asserting reset if core voltage drops below 1.575V or sensor rail sags below 1.575V during peak current draw. Use Value: Prevents firmware corruption during battery discharge cycles; enables safe shutdown before data loss or state corruption. |
Use Scenario: Industrial PLC module with dual-rail power (1.8V core, 1.5V I/O) operating in extended temperature range. IC Role / Device Role: Monitors both rails independently and triggers hardware reset upon first undervoltage event, ensuring deterministic boot sequence. Use Value: Eliminates need for discrete supervisors or FPGA-based monitoring; reduces BOM count and layout area in space-constrained modules. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Handheld multimeter with precision ADC, 1.8V µP, and 1.5V reference supply. IC Role / Device Role: Asserts reset if reference rail dips below 1.575V, preventing inaccurate measurements due to unstable reference. Use Value: Maintains metrological integrity by halting µP execution until reference stabilizes-no software calibration workaround needed. |
Use Scenario: Medical infusion pump controller where µP failure could cause dosage error. IC Role / Device Role: Provides fail-safe reset initiation via MR button and continuous watchdog supervision of motor control loop. Use Value: Meets IEC 62304 Class C safety requirements through hardware-enforced reset on software hang or power anomaly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6829VFUT-T | Same functionality and specs, but leaded (Pb-containing) packaging instead of lead-free (+T). | Not suitable for RoHS-compliant production; requires Pb-compatible assembly process. | Select only for legacy rework or non-RoHS programs where lead-free compliance is waived. |
| MAX6830VFUT+T | Identical VCC/VCC2 thresholds and timing, but features active-high push-pull RESET output instead of active-low. | Requires redesign of reset net polarity; incompatible with µPs expecting active-low reset assertion. | Choose only when system architecture mandates active-high reset signaling and board-level inversion is impractical. |
Compared with MAX6829VFUT+T, the leaded MAX6829VFUT-T lacks RoHS compliance and cannot be used in modern consumer/industrial production, while the MAX6830VFUT+T changes reset polarity-requiring schematic and firmware validation to ensure correct µP response to active-high assertion.
Availability
MAX6829VFUT+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 performance.
Supply support for MAX6829VFUT+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, low-power, and small-footprint solutions.
The MAX6826–MAX6831 family was engineered specifically for dual-rail µP supervision in space-constrained, battery-sensitive systems-delivering factory-trimmed thresholds, integrated watchdog, and guaranteed operation down to 1.0V VCC.
FAQ
What is the exact VCC reset threshold voltage for MAX6829VFUT+T?
The MAX6829VFUT+T has a factory-trimmed VCC reset threshold of +1.575V (typical), with min/max limits of +1.521V and +1.629V over the full –40°C to +125°C temperature range. This value is specified in the Electrical Characteristics table under "VCC Reset Threshold" for suffix 'V', and applies directly to the MAX6829VFUT+T device.
Does MAX6829VFUT+T monitor both VCC and VCC2 simultaneously?
Yes, MAX6829VFUT+T monitors VCC and VCC2 simultaneously using two independent comparators. VCC is monitored against the +1.575V threshold, and VCC2 is monitored against the same +1.575V threshold-both asserted events trigger the same active-low RESET output. Pin 5 (VCC2) must be connected to the secondary supply rail.
What is the watchdog timeout period for MAX6829VFUT+T, and how is it cleared?
The MAX6829VFUT+T features a nominal 1.6s watchdog timeout period (0.8s–2.6s over temperature). It is cleared by any rising or falling edge on the WDI pin, by assertion of MR, or by RESET output assertion. If WDI is left unconnected, the internal driver resets the timer every ~1.4s, effectively disabling watchdog functionality.
Can MAX6829VFUT+T operate reliably at VCC = +1.0V?
Yes, MAX6829VFUT+T is guaranteed to assert a valid RESET output down to VCC = +1.0V. Its internal circuitry remains functional and the push-pull RESET output maintains specified VOL ≤0.3V at 50µA sink current even at this minimum supply voltage, ensuring robust brownout protection.
Is the RESET output of MAX6829VFUT+T open-drain or push-pull?
The RESET output of MAX6829VFUT+T is active-low push-pull. This is confirmed by the Selector Guide (page 11), which shows MAX6829 with "✔" under "ACTIVE-LOW RESET" and "-" under "OPEN-DRAIN RESET", and by the Pin Description (page 6) stating "Active-Low Push-Pull Reset Output" for pin 1 on MAX6829.
MAX6829VFUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.05V, 1.58V
- 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
MAX6829VFUT+T FAQ
1.How can I place an order for MAX6829VFUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829VFUT+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 MAX6829VFUT+T reliable?
The price and inventory of MAX6829VFUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829VFUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829VFUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829VFUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829VFUT+T?
MAX6829VFUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829VFUT+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 MAX6829VFUT+T?
For technical support, including MAX6829VFUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829VFUT+T requirements.
6.How does Aetrix verify that MAX6829VFUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829VFUT+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 MAX6829VFUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829VFUT+T?
All MAX6829VFUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829VFUT+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 MAX6829VFUT+T part is unused and in its original packaging.
Return procedure for MAX6829VFUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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