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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:1,024
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Product details
Overview
MAX6829YHUT+T from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (2.19V threshold) and secondary VCC2 (1.313V threshold), with manual reset input, watchdog timer (1.6s timeout), and active-low push-pull RESET output - used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6829YHUT+T datasheet, MAX6829YHUT+T pinout, MAX6829YHUT+T application, or MAX6829YHUT+T equivalent, key selection considerations include its factory-trimmed dual-threshold architecture, guaranteed reset validity down to VCC = +1.0V, immunity to short negative VCC transients, and compatibility with multivoltage systems requiring independent monitoring of core and I/O supplies.
Technical Context
The MAX6829YHUT+T implements two independent voltage comparators: one for VCC (threshold = 2.19V, ±0.07V over –40°C to +125°C) and one factory-trimmed comparator for VCC2 (threshold = 1.313V, ±0.045V). It integrates a 1.6s watchdog timer with edge-triggered clearing and a 140ms minimum reset timeout delay after supply recovery.
Its push-pull RESET output asserts low during VCC/VCC2 undervoltage, MR assertion, or watchdog timeout, and remains asserted for the full timeout period before returning high. The device draws only 25µA max ICC at –40°C to +125°C and operates across the full industrial temperature range (–40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.19V (±0.07V) - sets primary supply monitoring point for +2.1V to +2.75V VCC range |
| VCC2 Threshold | 1.313V (±0.045V) - factory-trimmed secondary monitor for low-voltage rails like 1.2V/1.3V cores |
| Reset Timeout | 140ms min - ensures µP remains held in reset long enough for stable power rail settling |
| Watchdog Timeout | 1.6s nominal - detects firmware hangs in embedded controllers without external timing components |
| Supply Current | 25µA max (–40°C to +125°C) - enables use in always-on battery-backed monitoring circuits |
| Operating Temp | –40°C to +125°C - supports automotive under-hood and industrial control environments |
| VCC Range | +2.1V to +2.75V - matches common low-voltage logic and core supply domains |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free (+T suffix), 1.6mm × 2.9mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives low to assert reset; returns high after timeout - no external pullup required |
| 2 - GND | Ground reference | Common return for all internal comparators, timer, and output stage |
| 3 - MR | Manual reset input (active-low) | Internal 50kΩ pullup; assert low ≥1µs to force reset; noise-immune with optional 0.1µF cap |
| 4 - WDI | Watchdog input | Edge-sensitive; toggling clears 1.6s timer; left floating disables watchdog function |
| 5 - VCC2 | Secondary supply monitor input | Direct connection to 1.2V–1.3V rail; factory-trimmed 1.313V threshold comparator input |
| 6 - VCC | Primary supply input and bias source | Powers internal circuitry and sets VCC threshold; also biases RESET IN comparator when used |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (2.19V) and VCC2 (1.313V) with separate comparators - eliminates need for discrete supervisors in multirail systems |
| Guaranteed reset validity to VCC = +1.0V | Ensures clean, monotonic RESET assertion even during deep brownout - critical for fail-safe shutdown in battery-powered devices |
| No external components required | Integrates precision references, timer, and push-pull driver - reduces BOM count and PCB area vs. discrete RC+comparator solutions |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset - improves robustness in electrically noisy environments |
| 1.6s watchdog with edge-triggered clear | Supports flexible firmware supervision: rising/falling edges on WDI reset timer - avoids false timeouts from static logic levels |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Power management in handheld medical monitors with dual 2.2V analog front-end and 1.2V digital core supplies. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low RESET until both rails stabilize post-battery insertion. Use Value: Prevents erratic startup by holding µP in reset until VCC (2.19V) and VCC2 (1.313V) exceed thresholds and remain valid for ≥140ms. |
Use Scenario: Industrial PLC module with ARM Cortex-M4 running real-time control firmware. IC Role / Device Role / Timing Role: Watchdog and voltage monitor ensuring deterministic recovery from lockups or undervoltage events. Use Value: 1.6s watchdog timeout detects stalled code execution; MR allows field-service reset without power cycle. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable oscilloscope with FPGA-configurable analog signal chain powered by 2.5V and 1.2V rails. IC Role / Device Role / Timing Role: Simultaneous monitoring of FPGA I/O (2.5V) and core logic (1.2V) supplies with coordinated reset assertion. Use Value: Factory-trimmed VCC2 threshold (1.313V) precisely matches 1.2V rail tolerance; eliminates calibration overhead. |
Use Scenario: Automotive body control module where µP must never execute invalid code during cold-crank voltage sag. IC Role / Device Role / Timing Role: Primary VCC supervisor guaranteeing RESET remains valid down to +1.0V supply level. Use Value: Eliminates risk of partial reset or metastability during <1.2V cranking transients - meets ASIL-B functional safety intent. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory 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 timing | Required when host µP expects active-high reset assertion (e.g., certain Renesas SH-series) | Select MAX6830YHUT+T only if system-level reset polarity demands high-true signaling |
| TPS3808G125DBVR | Single-supply monitor (1.25V threshold), no VCC2 input; 200ms reset timeout; 3.3V–6V VDD range | Cannot replace dual-monitoring function; suitable only for single-rail systems where VCC2 monitoring is handled separately | Use TPS3808G125DBVR only when supervising one supply and external circuitry handles secondary rail monitoring |
Compared with MAX6829YHUT+T, MAX6830YHUT+T provides identical dual-threshold supervision but inverted reset polarity - critical for interface compatibility - while TPS3808G125DBVR offers higher VDD range and longer timeout but lacks integrated VCC2 monitoring, requiring additional components for dual-rail coverage.
Availability
MAX6829YHUT+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 RoHS-compliant packaging.
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 demanding industrial, automotive, and computing applications.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail µP supervision in space-constrained, battery-sensitive systems - delivering factory-trimmed accuracy, wide temperature operation, and integrated watchdog functionality in 6-pin SOT23.
FAQ
What is the exact VCC2 reset threshold voltage for MAX6829YHUT+T?
The MAX6829YHUT+T has a factory-trimmed VCC2 reset threshold of 1.313V (typical), with guaranteed range of 1.268V to 1.358V over –40°C to +125°C. This value is fixed per the "YH" suffix in the part number and corresponds to the H threshold grade in the VCC2 Threshold table. It is designed specifically for monitoring 1.2V–1.3V core supplies without external resistor dividers.
Does MAX6829YHUT+T support manual reset functionality, and how is it implemented?
Yes, MAX6829YHUT+T includes a dedicated MR (manual reset) input on Pin 3. It is active-low with an internal 50kΩ pullup to VCC. Driving MR low for ≥1µs forces an immediate reset assertion, which persists for the full 140ms timeout after MR returns high. Leaving MR unconnected defaults to inactive state - no external components are needed unless noise immunity requires a 0.1µF capacitor to GND.
What is the watchdog timeout behavior of MAX6829YHUT+T, and how is it cleared?
The MAX6829YHUT+T features a 1.6s nominal watchdog timeout period. The internal timer is cleared on any rising or falling edge at the WDI (Pin 4) input - not just level changes. If WDI is left unconnected, the internal driver toggles every ~1.4s, preventing timeout. To enable watchdog supervision, firmware must toggle WDI at least once per 1.6s interval; failure triggers a full reset timeout.
Can MAX6829YHUT+T monitor a 1.5V supply as VCC2?
No - MAX6829YHUT+T is factory-trimmed for a fixed VCC2 threshold of 1.313V and is not user-adjustable. For 1.5V monitoring, select MAX6826/MAX6827/MAX6828 variants with RESET IN pin and external resistor divider, or choose a different suffix (e.g., "V" for 1.575V VCC2 threshold). The "YH" suffix strictly defines 1.313V VCC2 monitoring capability.
What package type and RoHS status does MAX6829YHUT+T use?
MAX6829YHUT+T uses a 6-pin SOT23 package (outline U6+1, land pattern 90-0175) with lead-free termination, indicated by the "+T" suffix. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), rated for reflow up to 260°C. The "+" in "+T" explicitly denotes RoHS-compliant packaging.
MAX6829YHUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-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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