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Analog Devices Inc./Maxim Integrated MAX6829SFUT+T
- Part No.:
- MAX6829SFUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829SFUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,655
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Product details
Overview
MAX6829SFUT+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 2.93V and secondary supply (VCC2) at 2.188V with ±0.5% threshold accuracy over -40°C to +125°C, assert active-low push-pull RESET during brownout or watchdog timeout, and support manual reset input - used in battery-powered embedded controllers requiring reliable power-up sequencing and fault recovery.
For engineers reviewing the MAX6829SFUT+T datasheet, MAX6829SFUT+T pinout, MAX6829SFUT+T application, or MAX6829SFUT+T equivalent, key selection considerations include its factory-trimmed dual-threshold monitoring (2.93V/2.188V), 140ms minimum reset timeout, 1.6s watchdog period, guaranteed reset validity down to VCC = +1.2V, and compatibility with multivoltage systems where precise voltage supervision and noise-immune reset assertion are critical.
Technical Context
The MAX6829SFUT+T integrates two independent voltage comparators: one for VCC (threshold = 2.93V, suffix 'S') and one for VCC2 (threshold = 2.188V, suffix 'F'), both with 60ppm/°C temperature coefficient and 2×VTH hysteresis. It uses internal BiCMOS circuitry to guarantee correct reset state down to VCC = +1.2V across full industrial temperature range.
Its watchdog timer clears on any WDI edge (min pulse width 50ns) and triggers reset if no transition occurs within 1.12–2.4s (temp-dependent); MR input features internal 50kΩ pullup and 100ns glitch rejection. The push-pull RESET output sinks up to 3.2mA at VCC ≥ 4.25V and maintains VOL ≤ 0.3V under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.93V (±0.03V over -40°C to +125°C) - sets primary supply brownout detection point for 3.3V I/O rails |
| VCC2 Threshold | 2.188V (±0.015V over -40°C to +125°C) - factory-trimmed secondary monitor for 2.5V core or analog supplies |
| Reset Timeout | 140ms min (200ms typ) - ensures µP completes power stabilization before release from reset |
| Watchdog Period | 1.6s nominal (1.12–2.4s over temp) - provides robust software execution monitoring without excessive overhead |
| RESET Output Type | Active-low push-pull - drives reset line directly without external pullup; compatible with standard µP reset inputs |
| Supply Current | 7µA typ at VCC = +3.6V, -40°C to +85°C - enables multi-year operation in coin-cell–powered instrumentation |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive modules and industrial control environments |
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 when VCC/VCC2 drop below thresholds, MR pulled low, or watchdog times out |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Manual-reset input (active-low); internal 50kΩ pullup to VCC; 1µs minimum pulse width required |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; unconnected or high-impedance disables watchdog |
| 5 | VCC2 | Secondary supply input; connects directly to monitored 2.188V rail (e.g., 2.5V LDO output) |
| 6 | VCC | Primary supply input; powers device and monitors 2.93V rail (e.g., 3.3V system bus) |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitoring | Simultaneously supervises 2.93V (VCC) and 2.188V (VCC2) with <±0.5% initial accuracy and 60ppm/°C drift - eliminates external resistor dividers and calibration |
| Guaranteed reset validity down to VCC = +1.2V | Ensures deterministic reset assertion even during deep brownout conditions common in battery discharge profiles |
| No external components required | Integrates pullup on MR, precision references, watchdog timer, and reset delay generator - reduces BOM count and PCB area vs. discrete solutions |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset - improves reliability in electrically noisy environments |
| 140ms minimum reset timeout | Provides sufficient hold time for slow-ramping supplies and clock stabilization in low-power µP systems |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Coin-cell–powered handheld meter with 3.3V display interface and 2.5V sensor front-end. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low RESET to MSP430 during battery voltage sag below 2.93V or 2.188V. Use Value: Prevents corrupted EEPROM writes and invalid ADC conversions by holding µP in reset until both rails stabilize post-brownout. |
Use Scenario: Industrial PLC module with separate 3.3V I/O and 2.5V FPGA core supplies. IC Role / Device Role / Timing Role: Monitors VCC (3.3V) and VCC2 (2.5V) simultaneously; triggers reset if either drops, ensuring synchronized restart of logic and peripherals. Use Value: Eliminates partial initialization failures caused by mismatched power-up timing between subsystems. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable gas analyzer using low-power ARM Cortex-M0 with 2.93V analog front-end and 2.188V reference buffer. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation via MR button and watchdog supervision of firmware execution loops. Use Value: Guarantees instrument reboots upon firmware hang or sensor supply anomaly, meeting IEC 61508 functional safety requirements. |
Use Scenario: Automotive body controller with 3.3V CAN transceiver and 2.5V microcontroller core. IC Role / Device Role / Timing Role: Supervises dual rails with extended temperature range (-40°C to +125°C) and asserts reset within 20µs of VCC drop. Use Value: Meets AEC-Q100 Grade 1 qualification for mission-critical reset assurance under thermal stress and voltage transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830SFUT+T | Active-high push-pull RESET output instead of active-low; identical VCC/VCC2 thresholds and timing specs | Required when host µP accepts only active-high reset assertion (e.g., certain Renesas RX series) | Select MAX6830SFUT+T only when system-level reset polarity mandates high-true signaling; otherwise MAX6829SFUT+T provides broader µP compatibility. |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input; 200ms fixed reset timeout; 3.3V VDD range only | Lacks secondary supply monitoring capability; suitable only for single-rail systems without auxiliary voltage supervision | Choose TPS3808G33DBVR only for cost-sensitive single-supply designs; MAX6829SFUT+T is mandatory when dual-rail supervision (e.g., 3.3V + 2.5V) is required. |
Compared with MAX6830SFUT+T, MAX6829SFUT+T offers direct compatibility with industry-standard active-low µP reset inputs, while versus TPS3808G33DBVR it delivers essential dual-threshold supervision for multivoltage SoC platforms - making it the only option that satisfies simultaneous 2.93V/2.188V monitoring with guaranteed operation down to +1.2V VCC.
Availability
MAX6829SFUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across automotive-grade temperature ranges and long-lifecycle production programs.
Supply support for MAX6829SFUT+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 thermally robust solutions.
The MAX6826–MAX6831 product line was engineered specifically for dual-rail microprocessor supervision in space-constrained, multivoltage systems - delivering factory-trimmed thresholds, integrated watchdog, and guaranteed operation down to 1.2V to replace discrete supervision circuits.
FAQ
What is the exact VCC and VCC2 reset threshold voltage for MAX6829SFUT+T?
The MAX6829SFUT+T has a VCC reset threshold of 2.93V (suffix 'S') and a VCC2 reset threshold of 2.188V (suffix 'F'), both specified over -40°C to +125°C with ±0.03V and ±0.015V tolerance respectively. These values are factory-trimmed and documented in the Threshold Suffix Guide and Electrical Characteristics tables of the MAX6829SFUT+T datasheet.
Does MAX6829SFUT+T support manual reset and watchdog functions?
Yes, MAX6829SFUT+T includes both manual reset (MR pin with internal 50kΩ pullup) and watchdog input (WDI pin). Pulling MR low asserts reset for the timeout period; WDI must be toggled within 1.6s (nominal) to prevent watchdog-triggered reset. Both functions are fully operational across the -40°C to +125°C temperature range.
What is the reset output type and drive capability of MAX6829SFUT+T?
MAX6829SFUT+T features an active-low push-pull RESET output capable of sinking up to 3.2mA at VCC ≥ 4.25V while maintaining VOL ≤ 0.3V. This eliminates the need for external pullup resistors and ensures direct compatibility with standard µP reset inputs requiring active-low assertion.
Is MAX6829SFUT+T qualified for automotive or industrial temperature ranges?
Yes, MAX6829SFUT+T is rated for -40°C to +125°C operating temperature and is manufactured in a 6-pin SOT23 package with lead-free RoHS compliance ('+T' suffix). Its guaranteed reset validity down to VCC = +1.2V and immunity to 20µs VCC transients make it suitable for under-hood automotive modules and harsh industrial environments.
How does MAX6829SFUT+T differ from MAX6826/MAX6827/MAX6828 in terms of monitoring capability?
Unlike MAX6826–MAX6828, which use RESET IN for user-adjustable secondary monitoring (down to 0.63V), MAX6829SFUT+T replaces RESET IN with a factory-trimmed VCC2 input optimized for 2.188V - eliminating external resistor networks and improving accuracy and temperature stability for fixed secondary rails like 2.5V LDO outputs.
MAX6829SFUT+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, 2.93V
- 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
MAX6829SFUT+T FAQ
1.How can I place an order for MAX6829SFUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829SFUT+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 MAX6829SFUT+T reliable?
The price and inventory of MAX6829SFUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829SFUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829SFUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829SFUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829SFUT+T?
MAX6829SFUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829SFUT+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 MAX6829SFUT+T?
For technical support, including MAX6829SFUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829SFUT+T requirements.
6.How does Aetrix verify that MAX6829SFUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829SFUT+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 MAX6829SFUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829SFUT+T?
All MAX6829SFUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829SFUT+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 MAX6829SFUT+T part is unused and in its original packaging.
Return procedure for MAX6829SFUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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