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Analog Devices Inc./Maxim Integrated MAX6829RIUT+
- Part No.:
- MAX6829RIUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829RIUT+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:724
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Product details
Overview
MAX6829RIUT+ from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, designed to monitor primary supply (VCC) and secondary supply (VCC2) with factory-trimmed thresholds. It provides active-low push-pull RESET output, manual reset input (MR), watchdog timer (1.6s nominal timeout), and guaranteed reset validity down to VCC = +1.0V. Used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6829RIUT+ datasheet, MAX6829RIUT+ pinout, MAX6829RIUT+ application, or MAX6829RIUT+ equivalent, this page delivers verified electrical parameters, exact pin functions, real-world use scenarios, and validated alternative parts - all specific to the MAX6829RIUT+ variant with R (VCC threshold = 2.63V) and I (VCC2 threshold = 1.388V) suffixes, -40°C to +125°C operation, and lead-free SOT23-6 packaging.
Technical Context
The MAX6829RIUT+ integrates two independent voltage monitors: one for VCC (threshold = 2.63V, ±0.03V over temperature) and one for VCC2 (threshold = 1.388V, ±0.025V over temperature), both with 60 ppm/°C temperature coefficient and 2×VTH hysteresis. Its internal watchdog timer triggers reset if WDI remains static beyond 1.6s (min 1.12s, max 2.4s at -40°C to +85°C).
It features a dedicated MR input with internal 50kΩ pullup, 1µs minimum pulse width, and 100ns glitch rejection; RESET output asserts low within 20µs of VCC falling below threshold and maintains reset for ≥140ms after recovery. The device operates from VCC = +1.2V to +5.5V and draws only 25µA typical ICC at +3.6V and full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.63V (R-suffix), ±0.03V over -40°C to +125°C - sets primary supply brownout detection point |
| VCC2 Threshold | 1.388V (I-suffix), ±0.025V over -40°C to +125°C - factory-trimmed secondary supply monitor |
| Reset Timeout Period | 140ms min (tRP), 200ms typ - ensures µP completes power stabilization before release |
| Watchdog Timeout | 1.6s nominal (tWD), 1.12–2.4s range - detects firmware hangs in embedded systems |
| RESET Output Type | Active-low push-pull - drives low without external pullup, supports direct µP reset pin interface |
| Operating Voltage Range | +1.2V to +5.5V (VCC), -40°C to +125°C - enables use in ultra-low-voltage core supplies |
| Supply Current | 25µA max at +3.6V, -40°C to +125°C - minimizes battery drain in portable applications |
Pinout & Package
Package: 6-pin SOT23-6 (U6+1 outline, land pattern 90-0175), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC/VCC2 undervoltage, 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; 1µs minimum pulse width |
| 4 | WDI | Watchdog input; toggling clears 1.6s timer; unconnected disables watchdog |
| 5 | VCC2 | Secondary supply input; monitored at factory-trimmed 1.388V threshold |
| 6 | VCC | Primary supply input; monitored at R-suffix 2.63V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | VCC (2.63V) and VCC2 (1.388V) thresholds with 60 ppm/°C drift - eliminates need for external resistor dividers |
| Guaranteed reset validity | Operates correctly down to VCC = +1.0V - ensures robust reset assertion during deep brownout |
| No external components required | Internal pullup on MR, factory-trimmed thresholds, integrated watchdog - reduces BOM count and PCB area |
| Immunity to negative VCC transients | Withstands ≤20µs, 100mV undershoot without false reset - improves noise resilience in noisy power rails |
| Low quiescent current | 25µA max over full temperature range - extends battery life in portable instrumentation |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
|
Use Scenario: Power management in handheld medical monitors with dual-core SoC requiring separate 2.6V I/O and 1.4V core supply rails. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset when either rail drops below spec, with 140ms hold time for safe boot sequence. Use Value: Prevents corrupted firmware execution during battery sag by detecting undervoltage on both rails independently and guaranteeing reset until stable. |
Use Scenario: Industrial PLC controller with ARM Cortex-M4 MCU and isolated communication interfaces. IC Role / Device Role / Timing Role: Primary reset generator triggered by main 3.3V supply (VCC) and auxiliary 1.8V I/O supply (VCC2), with MR for field service reset. Use Value: Enables deterministic startup and recovery using single IC instead of discrete comparators and timers, reducing layout complexity. |
| Intelligent Instruments | Critical µP Monitoring |
|
Use Scenario: Precision digital multimeter with LCD display, ADC, and flash memory, powered by Li-ion battery with DC-DC regulation. IC Role / Device Role / Timing Role: Monitors regulated 2.6V analog front-end supply (VCC) and 1.4V digital core supply (VCC2), with watchdog guarding firmware execution. Use Value: Ensures measurement integrity by preventing operation under marginal supply conditions and recovering from software lockups automatically. |
Use Scenario: Aerospace-grade data logger where µP must never execute undefined code due to power anomaly. IC Role / Device Role / Timing Role: Fail-safe reset source with 1.0V minimum VCC operation and 140ms timeout, directly driving µP reset pin via push-pull output. Use Value: Meets AS6081 requirements for reset reliability by eliminating external passive dependencies and validating reset down to near-zero VCC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830RIUT+ | Active-high push-pull RESET output (vs. MAX6829RIUT+'s active-low); identical VCC/VCC2 thresholds and watchdog timing | Required when µP reset pin is active-high or requires high-true assertion signal | Select MAX6830RIUT+ only if system-level reset polarity demands active-high behavior |
| TPS3808G125DBVR | Single-supply monitor (VDD only), 1.25V threshold, no VCC2 input; 200ms reset timeout; 1.8–6.0V operating range | Lacks secondary supply monitoring - unsuitable for dual-rail systems unless VCC2 is derived and monitored externally | Use only for single-rail applications where secondary supply supervision is handled separately |
Compared with MAX6829RIUT+, MAX6830RIUT+ offers identical dual-monitoring capability but inverted reset polarity, while TPS3808G125DBVR provides higher voltage range and longer timeout but omits VCC2 monitoring entirely - making it a functional subset rather than drop-in replacement.
Availability
MAX6829RIUT+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, and critical µP monitoring requiring stable component supply across industrial temperature ranges.
Supply support for MAX6829RIUT+ 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 demanding industrial, automotive, and computing applications.
The MAX6826–MAX6831 family was engineered specifically for dual-rail microprocessor supervision in space-constrained, battery-sensitive systems - delivering factory-trimmed accuracy, ultra-low ICC, and guaranteed operation down to 1.0V VCC.
FAQ
What is the exact VCC and VCC2 reset threshold voltage for MAX6829RIUT+?
The MAX6829RIUT+ has a VCC reset threshold of 2.63V (R-suffix) and a VCC2 reset threshold of 1.388V (I-suffix), both specified over the full -40°C to +125°C temperature range with ±0.03V and ±0.025V tolerance respectively. These values are factory-trimmed and do not require external resistor networks - confirmed in the Threshold Suffix Guide and Electrical Characteristics tables of the MAX6826–MAX6831 datasheet.
Does MAX6829RIUT+ support active-high reset output?
No, MAX6829RIUT+ provides only active-low push-pull RESET output. For active-high functionality, the pin-compatible MAX6830RIUT+ (same thresholds, same package) must be used instead. The MAX6829RIUT+ datasheet explicitly states "MAX6829/MAX6830/MAX6831 provide a factory-trimmed threshold to monitor a 2nd voltage down to +0.9V" and lists RESET as active-low for MAX6829 in the Pin Description table.
Can MAX6829RIUT+ monitor a 1.2V supply on VCC2?
No - MAX6829RIUT+ is factory-trimmed for VCC2 = 1.388V (I-suffix). To monitor 1.2V, select MAX6829SDUT+ (D-suffix, VCC2 = 0.788V) or MAX6829SHUT+ (H-suffix, VCC2 = 1.313V), both within ±0.025V tolerance. The Standard Versions Table confirms I-suffix corresponds exclusively to 1.388V, and no configuration allows reprogramming or adjustment of the VCC2 threshold on MAX6829RIUT+.
What is the watchdog timeout period for MAX6829RIUT+ and how is it affected by temperature?
The MAX6829RIUT+ watchdog timeout is 1.6s nominal, with a range of 1.12s to 2.4s over -40°C to +85°C and 0.80s to 2.60s over -40°C to +125°C. This variation is documented in the Electrical Characteristics table under "Watchdog Timeout Period (tWD)" and illustrated in Figure MAX6826 toc04. The timer resets on any WDI edge and remains cleared while RESET is asserted.
Is MAX6829RIUT+ compatible with 1.8V VCC operation?
Yes - MAX6829RIUT+ operates with VCC as low as +1.2V (minimum over temperature) and is fully specified at +1.8V. Its VCC threshold of 2.63V means it will assert reset when a 1.8V supply falls below that level - which cannot occur - so it is intended for use with VCC ≥ 2.63V. For 1.8V primary supply monitoring, select MAX6829SVUT+ (S-suffix, VCC = 2.93V) or MAX6829TZUT+ (Z-suffix, VCC = 2.32V).
MAX6829RIUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.388V, 2.63V
- 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
MAX6829RIUT+ FAQ
1.How can I place an order for MAX6829RIUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829RIUT+ 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 MAX6829RIUT+ reliable?
The price and inventory of MAX6829RIUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829RIUT+ is usually 5 days.
3.What payment methods are accepted for MAX6829RIUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829RIUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829RIUT+?
MAX6829RIUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829RIUT+ 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 MAX6829RIUT+?
For technical support, including MAX6829RIUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829RIUT+ requirements.
6.How does Aetrix verify that MAX6829RIUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6829RIUT+ 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 MAX6829RIUT+ meets industry standards.
7.What is the process for return or replacement of MAX6829RIUT+?
All MAX6829RIUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829RIUT+, 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 MAX6829RIUT+ part is unused and in its original packaging.
Return procedure for MAX6829RIUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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