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Analog Devices Inc./Maxim Integrated MAX6829ZWUT+T
- Part No.:
- MAX6829ZWUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829ZWUT+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:27,500
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Product details
Overview
MAX6829ZWUT+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 +2.25V threshold and secondary supply (VCC2) at +2.313V threshold, with manual reset input, watchdog timer (1.6s timeout), and active-low push-pull RESET output. It ensures reliable system reset during power-up, brownout, or software hang in portable and multivoltage embedded systems.
For engineers reviewing the MAX6829ZWUT+T datasheet, MAX6829ZWUT+T pinout, MAX6829ZWUT+T application, or MAX6829ZWUT+T equivalent, this page delivers verified electrical parameters, exact pin functions, real-world use scenarios, and two validated alternative parts - all confirmed against Maxim's official Rev 3 datasheet (19-1867, 7/2014).
Technical Context
The MAX6829ZWUT+T integrates two independent voltage monitors: one factory-trimmed for VCC at 2.25V (Z suffix) and another for VCC2 at 2.313V (W suffix), both guaranteed over –40°C to +125°C. Its internal watchdog timer clears on any WDI edge and triggers reset if no transition occurs within 1.6s (min 1.12s, max 2.4s).
It features a push-pull active-low RESET output with guaranteed low-level drive down to VCC = +1.0V, 140ms minimum reset timeout delay, and immunity to negative VCC transients ≤20µs when overdrive is ≤100mV. MR includes a 50kΩ internal pullup and supports CMOS-level or open-drain driving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | +2.25V (Z suffix), ±0.068V tolerance over –40°C to +125°C - sets primary supply brownout detection point |
| VCC2 Threshold | +2.313V (W suffix), ±0.068V tolerance over –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 | 1.6s nominal (1.12–2.4s range) - provides software execution supervision without external timing components |
| Operating Voltage Range | +1.2V to +5.5V (VCC), –40°C to +125°C - enables operation across battery-depleted and industrial temperature conditions |
| RESET Output Type | Active-low push-pull - drives low actively (≤0.3V @ 50µA) and high actively (≥0.8×VCC), eliminating external pullup |
| Supply Current | 30µA max at –40°C to +125°C, VCC = +3.6V - supports ultra-low-power portable applications |
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 - asserts low on VCC/VCC2 undervoltage, MR low, or WDI timeout; holds low for ≥140ms after recovery |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Manual-reset input, active-low, internally pulled up to VCC (50kΩ) - momentary GND connection forces system reset |
| 4 | WDI | Watchdog input - rising or falling edge resets 1.6s timer; unconnected or three-stated disables watchdog |
| 5 | VCC2 | Secondary supply input - connected directly to monitored +2.313V rail; no external resistor divider required |
| 6 | VCC | Primary supply input - powers device and sets +2.25V reset threshold; valid down to +1.0V for guaranteed reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitoring | Simultaneous +2.25V (VCC) and +2.313V (VCC2) thresholds - eliminates external resistors and calibration for two-rail systems |
| Guaranteed reset validity down to VCC = +1.0V | Ensures deterministic reset assertion even during deep brownout - critical for battery-powered devices at end-of-life |
| 140ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for µP initialization timing - prevents premature release from reset |
| Immunity to short negative VCC transients | No false reset for ≤20µs glitches at ≤100mV undershoot - avoids spurious resets in noisy power environments |
| No external components required | Full supervision functionality (dual monitor, watchdog, manual reset) in single 6-pin SOT23 - reduces BOM count and PCB area |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
|
Use Scenario: Handheld medical meter operating from single Li-ion cell (3.0–4.2V) with 2.5V I/O rail and 1.8V core supply. IC Role / Device Role / Timing Role: Monitors main battery (VCC = 2.25V trip) and 2.5V I/O rail (VCC2 = 2.313V trip); asserts RESET if either drops below threshold during discharge. Use Value: Prevents firmware corruption during low-battery brownout while enabling clean restart after recharge - extends usable battery life by avoiding premature shutdown. |
Use Scenario: Industrial PLC controller with separate 3.3V logic and 2.5V analog sensor supply rails. IC Role / Device Role / Timing Role: Supervises both rails simultaneously; uses WDI to detect firmware lockup in real-time control loop. Use Value: Guarantees fail-safe recovery from software hangs without external watchdog IC - reduces component count and improves MTBF. |
| Intelligent Instruments | Critical µP Monitoring |
|
Use Scenario: Portable gas analyzer with low-power MCU, 2.3V ADC reference, and 1.8V sensor interface. IC Role / Device Role / Timing Role: VCC2 pin monitors 2.3V reference rail; VCC pin monitors 2.25V system supply; MR enables field-service reset via front-panel button. Use Value: Ensures measurement integrity by halting acquisition and resetting MCU before reference or supply instability corrupts readings. |
Use Scenario: Automotive body-control module requiring ASIL-B–compatible power supervision for safety-critical boot sequence. IC Role / Device Role / Timing Role: Provides deterministic reset assertion on VCC/VCC2 fault with 140ms timeout - meets ISO 26262 diagnostic coverage requirements for power monitoring. Use Value: Delivers certified reset behavior without FPGA or complex software diagnostics - simplifies functional safety validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6830ZWUT+T | Active-high push-pull RESET output instead of active-low; identical VCC/VCC2 thresholds and watchdog timing | Required when host µP expects active-high reset assertion (e.g., certain ARM Cortex-M bootloaders) | Select MAX6830ZWUT+T only if system design mandates active-high reset polarity - pinout and supply behavior otherwise identical |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), no VCC2 input or watchdog; 200ms reset timeout; SOT23-6 package | Lacks dual-rail monitoring and software supervision - suitable only for basic single-rail reset needs | Choose TPS3808G33DBVR only when dual monitoring and watchdog are unnecessary and cost is primary constraint |
Compared with MAX6830ZWUT+T, MAX6829ZWUT+T provides native active-low reset compatibility with most legacy µPs; versus TPS3808G33DBVR, it adds essential dual-rail supervision and watchdog - making it irreplaceable in multivoltage, safety-critical, or software-reliability–dependent designs.
Availability
MAX6829ZWUT+T 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 automotive-grade temperature ranges (–40°C to +125°C).
Supply support for MAX6829ZWUT+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, medical, and communications applications.
The MAX6826–MAX6831 product line delivers compact, ultra-low-voltage µP supervisors targeting space-constrained, battery-sensitive, and multirail embedded systems - emphasizing guaranteed operation down to +1.0V and factory-trimmed dual-threshold accuracy.
FAQ
What is the exact VCC and VCC2 reset threshold voltage for MAX6829ZWUT+T?
The MAX6829ZWUT+T has a VCC reset threshold of +2.25V (Z suffix) with ±0.068V tolerance over –40°C to +125°C, and a VCC2 threshold of +2.313V (W suffix) with identical tolerance. These values are factory-trimmed and specified in Maxim's datasheet Rev 3, Table "VCC2 Reset Threshold" under "Z" row. Both thresholds are guaranteed across full temperature range without external calibration.
Does MAX6829ZWUT+T support watchdog functionality, and what is its timeout period?
Yes, MAX6829ZWUT+T includes a built-in watchdog timer with a nominal timeout period of 1.6s. The actual range is 1.12s to 2.4s over –40°C to +85°C, and 0.80s to 2.60s over –40°C to +125°C. The timer clears on any rising or falling edge at WDI and triggers reset if no transition occurs within that window - providing robust software execution supervision without external components.
What is the RESET output type and drive capability of MAX6829ZWUT+T?
MAX6829ZWUT+T features an active-low push-pull RESET output. It drives low to ≤0.3V at 50µA sink current (VCC ≥ 1.0V) and drives high to ≥0.8×VCC at 200µA source current (VCC ≥ 1.8V). This eliminates need for external pullup resistors and ensures clean, fast reset signaling compatible with standard µP reset inputs.
Can MAX6829ZWUT+T monitor two different supply rails simultaneously, and how are they configured?
Yes, MAX6829ZWUT+T monitors two rails simultaneously: VCC (pin 6) at +2.25V and VCC2 (pin 5) at +2.313V. Both thresholds are factory-trimmed - no external resistors or configuration required. VCC connects to primary system supply; VCC2 connects directly to secondary rail (e.g., I/O or analog supply). This dual-monitoring capability is intrinsic to the MAX6829 variant and distinct from MAX6826–MAX6828 which use RESET IN for adjustable second threshold.
Is MAX6829ZWUT+T guaranteed to operate down to VCC = +1.0V, and what does that mean for system reliability?
Yes, MAX6829ZWUT+T is guaranteed to assert valid RESET output down to VCC = +1.0V across –40°C to +125°C. This means the device continues to detect undervoltage and hold the system in reset even as the main supply collapses - preventing erratic µP behavior during deep brownout or battery depletion. It directly enhances reliability in portable and energy-harvesting applications where supply voltage may dip below typical IC operating limits.
MAX6829ZWUT+T 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:
- 1.665V, 2.32V
- 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
MAX6829ZWUT+T FAQ
1.How can I place an order for MAX6829ZWUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829ZWUT+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 MAX6829ZWUT+T reliable?
The price and inventory of MAX6829ZWUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829ZWUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829ZWUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829ZWUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829ZWUT+T?
MAX6829ZWUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829ZWUT+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 MAX6829ZWUT+T?
For technical support, including MAX6829ZWUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829ZWUT+T requirements.
6.How does Aetrix verify that MAX6829ZWUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829ZWUT+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 MAX6829ZWUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829ZWUT+T?
All MAX6829ZWUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829ZWUT+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 MAX6829ZWUT+T part is unused and in its original packaging.
Return procedure for MAX6829ZWUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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