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Analog Devices Inc./Maxim Integrated MAX6829SVUT+T
- Part No.:
- MAX6829SVUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829SVUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
MAX6829SVUT+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 1.575V with ±0.025V 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 MAX6829SVUT+T datasheet, MAX6829SVUT+T pinout, MAX6829SVUT+T application, or MAX6829SVUT+T equivalent, key selection criteria include factory-trimmed dual-threshold monitoring (VCC = 2.93V, VCC2 = 1.575V), guaranteed RESET validity down to VCC = +1.2V, 140ms minimum reset timeout, immunity to sub-20µs negative VCC transients, and compatibility with low-power µP reset sequencing in portable instrumentation.
Technical Context
The MAX6829SVUT+T implements two independent voltage comparators: one for VCC (threshold = 2.93V, ±0.025V over temperature), another factory-trimmed for VCC2 (1.575V, ±0.025V). It integrates a 1.6s watchdog timer cleared by WDI edge transitions and a 140ms reset timeout delay generator that holds RESET asserted after all monitored voltages recover.
Its push-pull RESET output drives high (VOH ≥ 0.8×VCC) when inactive and low (VOL ≤ 0.3V at ISINK = 50µA) when asserted, with MR input featuring internal 50kΩ pullup and 200ns MR-to-RESET delay. The device operates from VCC = +1.2V to +5.5V and draws only 7µA typical ICC at VCC = +3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.93V (±0.025V over –40°C to +125°C); sets power-on reset point for main supply in 3.0V systems |
| VCC2 Threshold | 1.575V (±0.025V over –40°C to +125°C); factory-trimmed for accurate monitoring of 1.6V core rails |
| Reset Timeout | 140ms minimum; ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Period | 1.6s nominal (0.8s–2.6s over temperature); detects firmware hangs in deeply embedded applications |
| Supply Current | 7µA typical at VCC = +3.6V; enables multi-year operation in coin-cell–powered instruments |
| Operating Range | VCC = +1.2V to +5.5V; guarantees functional RESET assertion even during deep brownout |
| RESET Output Type | Active-low push-pull; eliminates external pullup and supports direct interface to µP reset pins |
Pinout & Package
Package: 6-pin SOT23 (U6+1, outline 21-0058), RoHS-compliant lead-free, footprint land pattern 90-0175.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC/VCC2 undervoltage, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system ground plane |
| 3 | MR | Manual-reset input (active-low, internal 50kΩ pullup); momentary GND connection forces system reset |
| 4 | WDI | Watchdog input; rising/falling edge clears 1.6s timer; unconnected disables watchdog function |
| 5 | VCC2 | Secondary supply input; connects directly to monitored 1.6V rail; threshold factory-trimmed to 1.575V |
| 6 | VCC | Primary supply input; powers device and sets main reset threshold at 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC (2.93V) and VCC2 (1.575V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity down to VCC = +1.2V | Ensures clean, deterministic reset assertion even during severe brownout conditions |
| No external components required | Factory-trimmed thresholds, internal pullup on MR, and integrated watchdog eliminate BOM parts |
| Immunity to short negative VCC transients | Withstands ≤20µs glitches down to VTH −100mV without spurious reset assertion |
| 140ms minimum reset timeout | Prevents premature µP release before power rails stabilize post-brownout |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Coin-cell–powered handheld meter with 3.0V main rail and 1.6V sensor core supply. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low RESET to ARM Cortex-M0 during VCC dip or VCC2 collapse. Use Value: Prevents corrupted ADC readings or flash writes during brownout via 140ms guaranteed hold time and 7µA quiescent current. |
Use Scenario: Industrial PLC I/O module with isolated 3.0V logic and 1.6V FPGA configuration rail. IC Role / Device Role / Timing Role: Fault detector triggering hardware reset on either rail failure, coordinated with watchdog timeout for firmware lockup recovery. Use Value: Eliminates need for discrete reset ICs and external RC timing networks while supporting –40°C to +125°C operation. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable gas analyzer with dual Li-ion cell input (3.0V nominal) and 1.6V MEMS sensor bias supply. IC Role / Device Role / Timing Role: Primary supervisor ensuring µP remains held until both supplies exceed 2.93V and 1.575V respectively. Use Value: Factory-trimmed VCC2 threshold avoids calibration drift; push-pull RESET removes pullup resistor from high-impedance analog section. |
Use Scenario: Medical infusion pump controller where µP reset integrity is safety-critical per IEC 62304. IC Role / Device Role / Timing Role: Redundant reset source with manual override (MR) and watchdog (WDI) to detect both power and software faults. Use Value: 1.6s watchdog period and 200ns MR response enable deterministic fail-safe behavior meeting Class C software requirements. |
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 |
|---|---|---|---|
| MAX6829TVUT+T | VCC threshold = 3.08V (vs. 2.93V); VCC2 unchanged at 1.575V | Suitable for 3.3V systems with tighter tolerance on main rail monitoring | Select when primary supply is 3.3V ±5% rather than 3.0V; same package and pinout |
| MAX6830SVUT+T | Active-high push-pull RESET (vs. active-low); VCC/VCC2 thresholds identical | Required for µPs with active-high reset inputs (e.g., certain Renesas RL78 variants) | Choose only if host µP demands active-high assertion; otherwise MAX6829SVUT+T provides direct compatibility |
Compared with MAX6829TVUT+T and MAX6830SVUT+T, the MAX6829SVUT+T uniquely balances 2.93V VCC threshold for 3.0V systems, 1.575V VCC2 for 1.6V cores, and active-low push-pull output - making it optimal for cost-sensitive, low-power embedded controllers where reset polarity and voltage alignment are fixed design constraints.
Availability
MAX6829SVUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, critical µP monitoring, and multivoltage systems requiring stable component supply across industrial temperature range and long-term production continuity.
Supply support for MAX6829SVUT+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 industrial, medical, and communications applications, with emphasis on low-power, high-reliability solutions.
The MAX6826–MAX6831 family delivers dual-supply µP supervision in ultra-small SOT23 packages, targeting space-constrained, battery-operated, and wide-temperature embedded systems needing deterministic reset behavior and watchdog safety.
FAQ
What is the exact VCC and VCC2 reset threshold voltage for MAX6829SVUT+T?
The MAX6829SVUT+T has a factory-trimmed VCC reset threshold of 2.93V (±0.025V over –40°C to +125°C) and VCC2 threshold of 1.575V (±0.025V over same range). These values are specified in the Threshold Suffix Guide: 'S' denotes 2.93V for VCC, 'V' denotes 1.575V for VCC2. The MAX6829SVUT+T uses these exact thresholds and does not support user-adjustable VCC2 monitoring.
Does MAX6829SVUT+T support manual reset and watchdog functions?
Yes, the MAX6829SVUT+T fully supports both features. Pin 3 (MR) is an active-low manual reset input with internal 50kΩ pullup; pulling it low forces RESET assertion for ≥140ms after release. Pin 4 (WDI) accepts edge-triggered watchdog pulses; failure to toggle within 1.6s (0.8s–2.6s over temperature) triggers reset. Both functions operate independently of VCC and VCC2 monitoring.
What is the RESET output type and drive capability of MAX6829SVUT+T?
The MAX6829SVUT+T features an active-low push-pull RESET output (Pin 1). When asserted, it sinks ≥50µA at VOL ≤ 0.3V (VCC ≥ 1.0V); when deasserted, it sources ≥200µA at VOH ≥ 0.8×VCC (VCC ≥ 1.8V). This eliminates need for external pullup resistors and allows direct connection to µP reset pins requiring active-low logic.
Can MAX6829SVUT+T monitor voltages below 1.575V on VCC2?
No. The MAX6829SVUT+T has a factory-trimmed VCC2 input (Pin 5) with fixed 1.575V threshold and no user-adjustable capability. Unlike MAX6826–MAX6828, it lacks the RESET IN pin for external resistor-divider networks. To monitor lower voltages (e.g., 1.2V or 0.9V), select MAX6829 with suffix 'D' (0.788V) or 'E' (0.833V), not the SV variant.
What is the minimum operating VCC voltage guarantee for MAX6829SVUT+T?
The MAX6829SVUT+T is guaranteed to assert valid RESET down to VCC = +1.2V over the full –40°C to +125°C temperature range. At VCC < +1.2V, RESET behavior is not characterized. This specification ensures robust operation during deep brownout events common in battery-powered systems nearing end-of-life.
MAX6829SVUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.575V, 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-6
MAX6829SVUT+T FAQ
1.How can I place an order for MAX6829SVUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829SVUT+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 MAX6829SVUT+T reliable?
The price and inventory of MAX6829SVUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829SVUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829SVUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829SVUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829SVUT+T?
MAX6829SVUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829SVUT+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 MAX6829SVUT+T?
For technical support, including MAX6829SVUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829SVUT+T requirements.
6.How does Aetrix verify that MAX6829SVUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829SVUT+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 MAX6829SVUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829SVUT+T?
All MAX6829SVUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829SVUT+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 MAX6829SVUT+T part is unused and in its original packaging.
Return procedure for MAX6829SVUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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