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Analog Devices Inc./Maxim Integrated MAX6829SDUT-T
- Part No.:
- MAX6829SDUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829SDUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
MAX6829SDUT-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 ±0.05V accuracy over –40°C to +125°C, assert active-low push-pull RESET on fault, and support manual reset and 1.6s watchdog timeout - used in battery-powered embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX6829SDUT-T datasheet, MAX6829SDUT-T pinout, MAX6829SDUT-T application, or MAX6829SDUT-T equivalent, this page delivers verified threshold voltages, reset timing behavior, VCC2 monitoring capability, watchdog input timing constraints, and real-world substitution guidance for multivoltage system design.
Technical Context
The MAX6829SDUT-T implements dual independent voltage monitoring: one factory-trimmed comparator for VCC2 (2.188V nominal, ±0.05V over temperature), and one preprogrammed VCC threshold (2.93V, S-suffix). It uses internal BiCMOS comparators with 60ppm/°C temperature coefficient and 2.5mV hysteresis on RESET IN path.
Its watchdog timer clears on any WDI edge (50ns minimum pulse width), times out after 1.6s (min 1.12s, max 2.4s over temperature), and asserts reset for ≥140ms (min) after recovery. The push-pull RESET output drives low to ≤0.3V at 100µA sink current and high to ≥0.8×VCC at 200µA source current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.93V (S-suffix), ±0.05V over –40°C to +125°C - sets primary supply brownout detection point |
| VCC2 Threshold | 2.188V (Y-suffix), ±0.05V over –40°C to +125°C - factory-trimmed secondary supply monitor |
| Reset Timeout Period | 140ms (min), 200ms (typ), 280ms (max) - ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout | 1.6s (nominal), 1.12–2.4s range over temperature - provides software execution supervision with minimal false triggers |
| RESET Output Type | Active-low push-pull - eliminates external pull-up resistor, supports direct interface to µP reset pins |
| Operating Voltage Range | VCC = 1.2V to 5.5V (–40°C to +125°C) - guarantees valid reset assertion down to 1.2V supply |
| Supply Current | 7µA (typ) at VCC = 3.6V, –40°C to +85°C - enables use in always-on battery-backed systems |
Pinout & Package
MAX6829SDUT-T is housed in a 6-pin SOT23 package (U6+1 outline, land pattern 90-0175), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and lead-free RoHS-compliant construction (designated by "+T" suffix; "-T" indicates standard leaded).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output - asserts low on VCC/VCC2 undervoltage, MR low, or WDI timeout; holds for ≥140ms after recovery |
| 2 | GND | Ground reference for all internal comparators and logic - must be low-impedance connection to system ground plane |
| 3 | MR | Manual reset input (active-low) - internal 50kΩ pullup to VCC; 1µs minimum pulse width required to trigger reset |
| 4 | WDI | Watchdog input - toggling within 1.6s prevents reset; unconnected or three-stated disables watchdog function |
| 5 | VCC2 | Secondary supply input - connects directly to monitored 2.188V rail; no external components required |
| 6 | VCC | Primary supply input - powers device and sets VCC threshold at 2.93V; operates down to 1.2V with guaranteed reset validity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (2.93V) and VCC2 (2.188V) with separate comparators - eliminates need for two discrete supervisors in dual-rail systems |
| Factory-trimmed VCC2 threshold | 2.188V ±0.05V over full temperature range - removes calibration burden and resistor-divider error in low-voltage I/O rail monitoring |
| Guaranteed reset validity to VCC = 1.2V | RESET output remains functional and meets VOL/VOH specs down to 1.2V supply - ensures reliable reset during deep brownout |
| No external components required | Integrated pullup on MR, fixed thresholds, and self-contained watchdog - reduces BOM count and PCB area vs. discrete solutions |
| Immunity to short negative VCC transients | Withstands ≤20µs negative glitches of up to 100mV below threshold without spurious reset - improves noise robustness in noisy power environments |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Power management in handheld medical devices with 3.3V main rail and 2.2V sensor interface rail. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low RESET to ARM Cortex-M0 MCU upon either rail dropping below threshold. Use Value: Prevents firmware corruption during battery discharge by holding MCU in reset until both rails stabilize above 2.93V and 2.188V respectively. |
Use Scenario: Industrial PLC module with isolated 3.3V logic and 2.2V analog front-end supplies. IC Role / Device Role / Timing Role: Primary supervisor monitoring VCC and VCC2, with MR tied to service button and WDI fed by watchdog timer in firmware. Use Value: Enables deterministic system recovery after brownout or software hang, with 140ms minimum reset hold time ensuring clean state initialization. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable oscilloscope with 3.3V FPGA core and 2.2V ADC reference supply. IC Role / Device Role / Timing Role: Fault detector triggering hardware reset when either supply deviates beyond ±2% of nominal, using factory-trimmed VCC2 input. Use Value: Eliminates need for precision external resistors while maintaining <±0.05V threshold accuracy across –40°C to +125°C operating range. |
Use Scenario: Automotive-grade telematics unit requiring fail-safe boot sequence under cold-crank conditions. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET during VCC sag to 1.8V, with watchdog timeout guarding against firmware lockup. Use Value: Guarantees reset remains asserted until VCC recovers to >2.93V and stays stable for ≥140ms - meeting ISO 16750-2 cold-crank immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830SDUT-T | Active-high push-pull RESET output instead of active-low; identical VCC/VCC2 thresholds and watchdog timing | Required where host µP expects active-high reset assertion (e.g., certain Renesas RX series) | Select MAX6830SDUT-T only if system-level reset polarity demands high-active signaling; otherwise MAX6829SDUT-T is drop-in compatible |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), no VCC2 input; 200ms fixed reset timeout; requires external pull-up on open-drain RESET | Suitable for simpler single-rail systems but cannot replace dual-monitoring function without adding second IC | Choose TPS3808G33DBVR only when monitoring only VCC is sufficient and board space allows for external pull-up resistor |
Compared with MAX6830SDUT-T, MAX6829SDUT-T offers native active-low reset polarity for broader µP compatibility; compared with TPS3808G33DBVR, it provides integrated dual-rail monitoring and push-pull drive - reducing component count and eliminating layout sensitivity to pull-up placement.
Availability
MAX6829SDUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, and critical µP monitoring applications requiring stable component supply across industrial temperature ranges.
Supply support for MAX6829SDUT-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 developed specifically for dual-rail microprocessor supervision in space-constrained, battery-sensitive systems - delivering factory-trimmed thresholds, integrated watchdog, and guaranteed operation down to 1.2V VCC.
FAQ
What is the exact VCC2 threshold voltage for MAX6829SDUT-T?
The MAX6829SDUT-T has a factory-trimmed VCC2 threshold of 2.188V, with ±0.05V tolerance over the full –40°C to +125°C operating temperature range. This value is specified in the Electrical Characteristics table under "VCC2 Reset Threshold" for the Y-suffix variant, and applies directly to MAX6829SDUT-T as confirmed in the Standard Versions Table and Selector Guide.
Does MAX6829SDUT-T support manual reset functionality?
Yes, MAX6829SDUT-T includes a dedicated MR (manual reset) input on Pin 3, with an internal 50kΩ pullup to VCC. Driving MR low for ≥1µs forces an immediate reset assertion, which remains active for the full reset timeout period (≥140ms) after MR returns high. No external components are needed for basic manual reset implementation.
What is the watchdog timeout behavior of MAX6829SDUT-T?
The MAX6829SDUT-T watchdog timer has a nominal timeout of 1.6s, with a guaranteed 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. It clears on any rising or falling edge at WDI (Pin 4); leaving WDI unconnected disables the watchdog function entirely, as the internal driver services the timer every ~1.4s.
Can MAX6829SDUT-T monitor a 1.8V supply as VCC2?
No - MAX6829SDUT-T is configured with Y-suffix VCC2 threshold of 2.188V and is not rated for reliable operation at 1.8V on the VCC2 pin. For 1.8V monitoring, select MAX6829WDUT-T (W-suffix, 1.665V) or MAX6829VDUT-T (V-suffix, 1.575V), as listed in the Standard Versions Table. Using MAX6829SDUT-T on 1.8V VCC2 would result in premature or missed reset assertion.
What package type and RoHS status does MAX6829SDUT-T use?
MAX6829SDUT-T uses a 6-pin SOT23 package (outline U6+1, land pattern 90-0175) with leaded termination ("-T" suffix). It is not RoHS-compliant by default; for lead-free compliance, the part number must be ordered as MAX6829SDUT+T, per Maxim's packaging specification note in the datasheet.
MAX6829SDUT-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:
- 0.788V, 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-23-6
MAX6829SDUT-T FAQ
1.How can I place an order for MAX6829SDUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829SDUT-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 MAX6829SDUT-T reliable?
The price and inventory of MAX6829SDUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829SDUT-T is usually 5 days.
3.What payment methods are accepted for MAX6829SDUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829SDUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829SDUT-T?
MAX6829SDUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829SDUT-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 MAX6829SDUT-T?
For technical support, including MAX6829SDUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829SDUT-T requirements.
6.How does Aetrix verify that MAX6829SDUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6829SDUT-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 MAX6829SDUT-T meets industry standards.
7.What is the process for return or replacement of MAX6829SDUT-T?
All MAX6829SDUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829SDUT-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 MAX6829SDUT-T part is unused and in its original packaging.
Return procedure for MAX6829SDUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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