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Analog Devices Inc./Maxim Integrated MAX6829TZUT+T
- Part No.:
- MAX6829TZUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829TZUT+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,204
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Product details
Overview
MAX6829TZUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (3.08V threshold) and secondary VCC2 (2.313V threshold), with active-low push-pull RESET output, manual reset input (MR), and watchdog timer (1.6s timeout). It ensures reliable µP reset during power-up, brownout, and software hang conditions in battery-powered embedded systems.
For engineers reviewing the MAX6829TZUT+T datasheet, MAX6829TZUT+T pinout, MAX6829TZUT+T application, or MAX6829TZUT+T equivalent, key selection criteria include its factory-trimmed dual-supply monitoring (VCC/VCC2), guaranteed reset validity down to VCC = +1.2V, 140ms min reset timeout, immunity to short negative VCC transients, and lead-free SOT23-6 packaging.
Technical Context
The MAX6829TZUT+T integrates two independent voltage comparators-one for VCC (threshold = 3.08V ±0.07V over –40°C to +125°C) and one for VCC2 (2.313V ±0.069V)-feeding an OR logic gate that triggers reset assertion. Its internal watchdog timer clears on any WDI edge and times out after 1.6s if no transition occurs.
Reset assertion is latched and held for ≥140ms after all monitored voltages exceed thresholds, MR returns high, or WDI toggles; the push-pull RESET output drives low with ≤0.3V VOL at ISINK = 50µA and remains valid down to VCC = +1.2V. MR includes a 50kΩ internal pullup, and WDI accepts CMOS-level transitions with 50ns minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 3.08V (±0.07V, –40°C to +125°C); monitors primary supply in 3.3V systems with margin against brownout |
| VCC2 Threshold | 2.313V (±0.069V, –40°C to +125°C); factory-trimmed to monitor secondary 2.5V rail without external resistors |
| Reset Timeout | 140ms minimum; ensures µP completes full initialization before release from reset state |
| Watchdog Timeout | 1.6s nominal; detects firmware lockup in real-time embedded applications |
| RESET Output Type | Active-low push-pull; eliminates need for external pullup resistor and supports direct interface to µP reset pins |
| Operating Voltage Range | +1.2V to +5.5V (VCC); guarantees functional reset assertion even during deep brownout conditions |
| Supply Current | ≤30µA at –40°C to +125°C; enables multi-year operation in coin-cell–powered portable devices |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free (indicated by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low during 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 with 50kΩ; debounced by design |
| 4 | WDI | Watchdog input; edge-sensitive (rising/falling); clears 1.6s timer on each transition |
| 5 | VCC2 | Dedicated secondary supply monitor input; factory-trimmed comparator threshold = 2.313V |
| 6 | VCC | Primary supply input and power source; powers internal circuitry and sets VCC-referenced thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC (3.08V) and VCC2 (2.313V) enables robust multivoltage system reliability |
| No external components required | Factory-trimmed thresholds eliminate resistor dividers, reducing BOM count and layout area in space-constrained designs |
| Guaranteed reset validity to VCC = +1.2V | Ensures deterministic reset behavior during severe brownout-critical for fail-safe embedded controllers |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset-reduces need for input filtering |
| 140ms minimum reset timeout | Meets JEDEC JESD78 requirements for µP power-on reset duration across temperature |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
|
Use Scenario: Coin-cell–powered IoT sensor node operating intermittently for multi-year lifespan. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring clean reset during cold-start and battery voltage sag. Use Value: 30µA max ICC and 1.2V VCC operation extend battery life; 3.08V/2.313V thresholds match typical 3.3V I/O and 2.5V analog rails. |
Use Scenario: Industrial PLC controller with separate 3.3V logic and 2.5V ADC reference supplies. IC Role / Device Role / Timing Role: Fault-tolerant reset generator asserting system reset if either supply drops below spec. Use Value: Factory-trimmed VCC2 eliminates calibration drift; 140ms timeout satisfies µP boot sequence timing. |
| Intelligent Instruments | Critical µP Monitoring |
|
Use Scenario: Handheld multimeter with LCD, MCU, and precision analog front-end powered from single Li-ion cell. IC Role / Device Role / Timing Role: Supervisor monitoring main 3.3V rail and 2.5V reference rail to prevent measurement corruption. Use Value: Push-pull RESET eliminates external pullup, saving board space; immunity to 20µs VCC glitches prevents false resets during switching noise. |
Use Scenario: Medical infusion pump requiring fail-safe restart on power anomaly or software fault. IC Role / Device Role / Timing Role: Watchdog-enforced reset generator with manual override via front-panel button (MR). Use Value: 1.6s watchdog timeout detects hung firmware; MR input with 50kΩ pullup simplifies button interface without external R/C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830TZUT+T | Active-high push-pull RESET output; identical VCC/VCC2 thresholds and watchdog timing | Required where host µP expects active-high reset assertion (e.g., certain ARM Cortex-M variants) | Select MAX6830TZUT+T only when system-level reset polarity mandates active-high signaling |
| MAX6829TTUT+T | VCC threshold = 3.15V (vs. 3.08V); same VCC2 = 2.313V, package, and features | Suitable for 3.3V systems with tighter tolerance on upper VCC margin (e.g., systems with low-dropout regulators) | Choose MAX6829TTUT+T when VCC nominal is 3.3V with <1% regulation error and higher trip point improves noise margin |
Compared with MAX6830TZUT+T and MAX6829TTUT+T, the MAX6829TZUT+T provides optimal balance of noise-immune 3.08V VCC trip point, active-low reset compatibility with legacy µPs, and guaranteed operation down to +1.2V-making it preferred for cost-sensitive, battery-operated, and industrial embedded designs requiring deterministic brownout response.
Availability
MAX6829TZUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply with long-term manufacturability and RoHS compliance.
Supply support for MAX6829TZUT+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, and thermally demanding environments-delivering factory-trimmed accuracy, watchdog safety, and guaranteed operation across –40°C to +125°C.
FAQ
What is the exact VCC reset threshold voltage for MAX6829TZUT+T over temperature?
The MAX6829TZUT+T has a VCC reset threshold of 3.08V, with min/max limits of 2.97V to 3.17V across –40°C to +125°C per the datasheet Electrical Characteristics table. This 3.08V nominal value corresponds to the "T" threshold suffix and is factory-trimmed for 3.3V supply monitoring with built-in hysteresis.
Does MAX6829TZUT+T support monitoring a secondary supply lower than 2.313V?
No-MAX6829TZUT+T features a fixed factory-trimmed VCC2 threshold of 2.313V and does not support user-adjustable secondary monitoring. For sub-2.3V supervision, select MAX6826/MAX6827/MAX6828 variants with RESET IN pin and 0.63V internal reference.
What is the watchdog timeout period of MAX6829TZUT+T, and how is it cleared?
The MAX6829TZUT+T watchdog timeout period is 1.6s nominal (min 1.12s, max 2.4s over –40°C to +85°C). It is cleared by any rising or falling edge on the WDI pin, by assertion of MR, or by internal reset assertion-ensuring immediate recovery from firmware hangs.
Can MAX6829TZUT+T operate reliably when VCC drops below 1.8V?
Yes-MAX6829TZUT+T is guaranteed to assert valid RESET down to VCC = +1.2V (not just +1.8V), with full functionality including VCC/VCC2 comparison, MR, and WDI detection maintained across the entire –40°C to +125°C range.
Is the RESET output of MAX6829TZUT+T open-drain or push-pull?
The RESET output of MAX6829TZUT+T is active-low push-pull, as confirmed by the Selector Guide and Pin Description tables. This eliminates the need for an external pullup resistor and allows direct connection to µP reset inputs requiring driven-low assertion.
MAX6829TZUT+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:
- 2.313V, 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
MAX6829TZUT+T FAQ
1.How can I place an order for MAX6829TZUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829TZUT+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 MAX6829TZUT+T reliable?
The price and inventory of MAX6829TZUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829TZUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829TZUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829TZUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829TZUT+T?
MAX6829TZUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829TZUT+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 MAX6829TZUT+T?
For technical support, including MAX6829TZUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829TZUT+T requirements.
6.How does Aetrix verify that MAX6829TZUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829TZUT+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 MAX6829TZUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829TZUT+T?
All MAX6829TZUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829TZUT+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 MAX6829TZUT+T part is unused and in its original packaging.
Return procedure for MAX6829TZUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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