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Analog Devices Inc./Maxim Integrated MAX6829YHUT-T
- Part No.:
- MAX6829YHUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829YHUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,651
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Product details
Overview
MAX6829YHUT-T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC that monitors primary supply (VCC) and secondary supply (VCC2) with factory-trimmed thresholds, provides manual reset input (MR), watchdog timer (WDI), and active-low push-pull RESET output. It asserts reset if VCC falls below 2.19V (±0.07V over temperature) or VCC2 falls below 2.188V (±0.075V), maintains reset for ≥140ms, and operates down to VCC = +1.2V across –40°C to +125°C. Used in battery-powered embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX6829YHUT-T datasheet, MAX6829YHUT-T pinout, MAX6829YHUT-T application, or MAX6829YHUT-T equivalent, this page delivers verified functional identity, exact threshold voltages, watchdog timeout behavior, reset assertion timing, and validated alternative options - all confirmed for the precise YH-suffix variant in 6-pin SOT23 packaging.
Technical Context
The MAX6829YHUT-T implements dual independent voltage monitoring: VCC threshold is 2.19V (Y-suffix, –40°C to +125°C range), and VCC2 threshold is 2.188V (H-suffix, same temperature range). Its internal watchdog timer has a nominal 1.6s timeout period, cleared on any WDI edge, and supports glitch rejection via 100ns MR input filtering.
This device uses BiCMOS process technology (750 transistors), features guaranteed reset validity down to VCC = +1.2V, includes an internal 50kΩ MR pullup, and asserts RESET low within 20µs of VCC falling below threshold or 15µs of RESET IN (VCC2) falling below its trip point - all without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V (min 2.11V, max 2.26V at –40°C to +125°C); sets power-on reset point for primary supply |
| VCC2 Reset Threshold | 2.188V (min 2.113V, max 2.263V at –40°C to +125°C); factory-trimmed secondary supply monitor |
| Reset Timeout Period | 140ms minimum; ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout Period | 1.6s nominal (0.80s–2.60s over temperature); detects firmware hangs in real-time systems |
| RESET Output Type | Active-low push-pull; drives low to 0.3V at 100µA sink, eliminating need for external pullup |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive under-hood environments |
| VCC Supply Current | 25µA max at –40°C to +125°C (VCC = +2.1V to +2.75V); enables multi-year battery life in portable gear |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant, lead-free option available as MAX6829YHUT+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC/VCC2 fault, MR low, or WDI timeout |
| 2 | GND | Ground reference for all internal comparators and logic |
| 3 | MR | Manual-reset input (active-low, internal 50kΩ pullup to VCC); debounced internally, no external RC needed |
| 4 | WDI | Watchdog input; toggling clears 1.6s timer; unconnected or three-stated disables watchdog |
| 5 | VCC2 | Secondary supply input; monitored against factory-trimmed 2.188V threshold |
| 6 | VCC | Primary supply input; monitored against Y-suffix 2.19V threshold; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (2.19V) and VCC2 (2.188V) with separate comparators and hysteresis |
| Guaranteed reset validity down to VCC = +1.2V | Ensures correct reset state even during deep brownout conditions before full power collapse |
| No external components required | Eliminates discrete resistors, capacitors, or diodes - reduces BOM count and PCB area |
| Immunity to short negative VCC transients | Withstands ≤20µs negative glitches down to 100mV below threshold without spurious reset |
| 1.6s watchdog with edge-triggered clear | Prevents firmware lockup by requiring periodic WDI transitions - not level-sensitive |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Wearable health monitor powered by single Li-ion cell with dual-rail system (3.3V I/O, 1.8V core). IC Role / Device Role / Timing Role: Supervises both rails; triggers reset if either drops during battery discharge or load surge. Use Value: Prevents corrupted sensor data logging by ensuring µC only runs when both supplies meet 2.19V/2.188V thresholds. |
Use Scenario: Industrial PLC controller with isolated communication interface and real-time OS. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and auxiliary 2.5V isolated supply; asserts reset on brownout or watchdog timeout. Use Value: Guarantees deterministic restart after power interruption or firmware hang - critical for safety-critical control loops. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Handheld multimeter with LCD, ADC, and flash memory storage. IC Role / Device Role / Timing Role: Detects VCC sag during high-current analog front-end sampling; holds µC in reset until stable. Use Value: Avoids EEPROM write corruption by enforcing ≥140ms reset hold time after supply recovery. |
Use Scenario: Medical infusion pump MCU requiring fail-safe power sequencing and runtime watchdog. IC Role / Device Role / Timing Role: Provides dual-supply supervision plus 1.6s watchdog - resets µC if motor driver firmware stalls. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced reset escalation. |
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 |
|---|---|---|---|
| MAX6830YHUT-T | Active-high push-pull RESET output instead of active-low; identical VCC/VCC2 thresholds and watchdog behavior | Required where host µP expects active-high reset assertion (e.g., certain ARM Cortex-M boot sequences) | Select MAX6830YHUT-T only when system-level reset polarity demands high-true signaling |
| TPS3808G18DBVR | Single-supply supervisor (monitors only VCC); 1.8V fixed threshold; 200ms reset timeout; no VCC2 or watchdog inputs | Lacks secondary supply monitoring and watchdog - suitable only for simpler single-rail systems | Choose TPS3808G18DBVR only if design uses one supply rail and does not require firmware hang detection |
Compared with MAX6829YHUT-T, MAX6830YHUT-T offers identical dual-monitoring capability but inverted reset polarity, while TPS3808G18DBVR reduces functionality to single-rail supervision without watchdog - making MAX6829YHUT-T the only option supporting simultaneous VCC/VCC2 monitoring with integrated 1.6s watchdog in SOT23.
Availability
MAX6829YHUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6829YHUT-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, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail microprocessor supervision in space-constrained, battery-operated, and high-reliability systems - delivering guaranteed operation down to 1.2V with factory-trimmed thresholds in 6-pin SOT23.
FAQ
What is the exact VCC reset threshold voltage for MAX6829YHUT-T over temperature?
The MAX6829YHUT-T has a VCC reset threshold of 2.19V typical, with min/max values of 2.11V and 2.26V across –40°C to +125°C. This Y-suffix threshold is factory-trimmed and specified in the Electrical Characteristics table under "VCC Reset Threshold" for MAX68_ _Y devices. The MAX6829YHUT-T uses this exact value for primary supply monitoring.
Does MAX6829YHUT-T monitor a second voltage, and what is its threshold?
Yes, MAX6829YHUT-T monitors VCC2 with a factory-trimmed threshold of 2.188V typical (2.113V to 2.263V over –40°C to +125°C), per the H-suffix specification in the VCC2 Reset Threshold table. Unlike MAX6826–MAX6828, it does not support user-adjustable RESET IN - VCC2 is dedicated and fixed.
What type of RESET output does MAX6829YHUT-T provide, and what are its drive capabilities?
MAX6829YHUT-T provides an active-low push-pull RESET output. It sinks up to 100µA while asserting low (VOL ≤ 0.3V at VCC ≥ 1.2V), and sources no current when deasserted - unlike open-drain variants. This eliminates external pullup resistors and simplifies interface to µPs with active-low reset pins.
How does the watchdog timer in MAX6829YHUT-T function, and what is its timeout range?
The MAX6829YHUT-T watchdog timer has a nominal 1.6s timeout (0.80s to 2.60s over temperature), cleared on any rising or falling edge at WDI. If WDI remains static beyond timeout, RESET asserts for ≥140ms. The timer is disabled if WDI is left unconnected or three-stated - a key behavior confirmed in the Functional Diagram and Watchdog Input section of the datasheet.
Is MAX6829YHUT-T compatible with systems requiring operation down to 1.0V VCC?
No - MAX6829YHUT-T is guaranteed to operate down to VCC = +1.2V over –40°C to +125°C, per the Absolute Maximum Ratings and Electrical Characteristics tables. While earlier MAX6826–MAX6828 variants guarantee operation to +1.0V, the YH-suffix MAX6829YHUT-T's lower limit is +1.2V, confirmed in the "Operating Voltage Range" parameter row.
MAX6829YHUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.313V, 2.19V
- 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-23-6
MAX6829YHUT-T FAQ
1.How can I place an order for MAX6829YHUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829YHUT-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 MAX6829YHUT-T reliable?
The price and inventory of MAX6829YHUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829YHUT-T is usually 5 days.
3.What payment methods are accepted for MAX6829YHUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829YHUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829YHUT-T?
MAX6829YHUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829YHUT-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 MAX6829YHUT-T?
For technical support, including MAX6829YHUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829YHUT-T requirements.
6.How does Aetrix verify that MAX6829YHUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6829YHUT-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 MAX6829YHUT-T meets industry standards.
7.What is the process for return or replacement of MAX6829YHUT-T?
All MAX6829YHUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829YHUT-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 MAX6829YHUT-T part is unused and in its original packaging.
Return procedure for MAX6829YHUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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