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Analog Devices Inc./Maxim Integrated MAX6829SHUT+T
- Part No.:
- MAX6829SHUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6829SHUT+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6829SHUT+T 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, manual reset input (MR), and watchdog timer (WDI). It asserts an active-low push-pull RESET output when either supply drops below its threshold or MR is pulled low, maintaining reset for ≥140ms after recovery. It supports critical µP monitoring in portable, multivoltage, and embedded systems operating from -40°C to +125°C.
For engineers reviewing the MAX6829SHUT+T datasheet, MAX6829SHUT+T pinout, MAX6829SHUT+T application, or MAX6829SHUT+T equivalent, key selection considerations include its fixed VCC2 monitor (2.5V nominal), push-pull RESET output, guaranteed reset validity down to VCC = +1.2V, immunity to short negative VCC transients, and no external component requirement.
Technical Context
The MAX6829SHUT+T integrates two independent voltage monitors: one for VCC (programmable threshold via suffix 'H' = 2.93V) and one factory-trimmed VCC2 monitor (2.5V nominal, ±1.5% over temperature). Its internal 1.6s watchdog timer clears on any WDI edge and triggers reset if unattended beyond timeout.
It features a dedicated MR input with internal 50kΩ pullup, enabling manual reset assertion without external components, and guarantees valid RESET output behavior across full industrial temperature range (-40°C to +125°C) and down to VCC = +1.2V minimum operating voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (±1.5% over -40°C to +125°C); sets primary supply brownout detection point |
| VCC2 Reset Threshold | 2.5V (±1.5% over -40°C to +125°C); factory-trimmed secondary supply monitor, no external resistor divider needed |
| Reset Timeout Period | 140ms minimum; ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout Period | 1.6s nominal (0.8s–2.6s over temperature); provides software execution supervision with wide tolerance |
| RESET Output Type | Active-low push-pull; drives high-impedance loads directly without external pullup, compatible with standard µP reset inputs |
| Operating Voltage Range | +1.2V to +5.5V on VCC; enables operation in ultra-low-voltage systems while maintaining reset integrity |
| Supply Current (ICC) | 7µA typical at +3.6V, -40°C to +85°C; ultra-low quiescent current extends battery life in portable equipment |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant lead-free packaging indicated by "+T" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low during VCC/VCC2 undervoltage, MR low, or watchdog timeout |
| 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); initiates reset when pulled to GND |
| 4 | WDI | Watchdog input; rising or falling edge clears internal 1.6s timer; left unconnected disables watchdog |
| 5 | VCC2 | Secondary supply input; connected directly to monitored 2.5V rail; enables dual-supply monitoring without external components |
| 6 | VCC | Primary supply input; powers device and sets VCC reset threshold (2.93V for 'H' suffix) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneously supervises VCC (2.93V) and VCC2 (2.5V) with separate comparators and hysteresis, eliminating need for discrete supervisors |
| Guaranteed reset validity down to VCC = +1.2V | Ensures reliable reset assertion even during deep brownout conditions common in battery-powered systems |
| No external components required | Factory-trimmed VCC2 threshold and internal MR pullup eliminate resistors, capacitors, and trimming circuits-reducing BOM count and board space |
| Immunity to short negative VCC transients | Withstands ≤20µs negative glitches down to 100mV below threshold without spurious reset, improving noise robustness in noisy environments |
| 140ms minimum reset timeout | Provides sufficient hold time for µP power stabilization and clock startup before release, meeting JEDEC JESD78 reliability requirements |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld medical devices powered by single-cell Li-ion batteries experiencing voltage sag under load. IC Role / Device Role / Timing Role: Dual-supply supervisor monitoring main system rail (2.93V) and analog sensor rail (2.5V), asserting synchronized reset on either undervoltage. Use Value: Prevents corrupted sensor data acquisition and firmware crashes during transient brownouts, extending usable battery runtime via ultra-low 7µA ICC. |
Use Scenario: Industrial PLC controller with separate 2.93V core logic and 2.5V I/O supply rails. IC Role / Device Role / Timing Role: Ensures deterministic system boot and fault recovery by holding µP in reset until both supplies stabilize above thresholds. Use Value: Eliminates need for two discrete supervisors or complex power sequencing ICs-reducing design complexity and qualification effort. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Portable oscilloscope with FPGA-based signal processing requiring clean power-up of 2.93V digital core and 2.5V ADC reference. IC Role / Device Role / Timing Role: Monitors both rails independently; asserts push-pull RESET to FPGA reset pin without external pullup. Use Value: Guarantees simultaneous reset assertion across domains, preventing metastability and latch-up during power ramp. |
Use Scenario: Automotive body control module where µP must not execute code during unstable power conditions. IC Role / Device Role / Timing Role: Provides fail-safe reset generation with 140ms timeout and watchdog supervision, validated down to -40°C. Use Value: Meets ASIL-B functional safety prerequisites for power-on reset integrity without additional redundancy circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6827SHUT+T | Same VCC threshold (2.93V) and package, but features active-high push-pull RESET output instead of active-low | Requires µP with active-high reset input; incompatible with standard active-low reset pins without level-shifting | Select only if target µP requires active-high reset assertion and timing compatibility is verified |
| MAX6830SHUT+T | Same VCC/VCC2 thresholds and package, but uses open-drain RESET output instead of push-pull | Requires external pullup resistor; supports wired-OR reset bus configurations and bidirectional µP reset pins (e.g., Motorola 68HC11) | Choose when system-level reset arbitration or µP bidirectional reset I/O is required |
Compared with MAX6829SHUT+T, MAX6827SHUT+T changes reset polarity (active-high), demanding µP interface redesign, while MAX6830SHUT+T replaces push-pull with open-drain, adding external component overhead but enabling shared reset buses.
Availability
MAX6829SHUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across extended temperature ranges and low-power operation.
Supply support for MAX6829SHUT+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6826–MAX6831 family was designed specifically for dual-rail µP supervision in space-constrained, ultra-low-power systems-emphasizing guaranteed operation down to 1.2V, factory-trimmed accuracy, and integrated watchdog functionality.
FAQ
What is the VCC2 reset threshold voltage for MAX6829SHUT+T?
The MAX6829SHUT+T has a factory-trimmed VCC2 reset threshold of 2.5V, with ±1.5% tolerance over the full operating temperature range (-40°C to +125°C). This value is fixed and does not require external resistor dividers, distinguishing it from the adjustable RESET IN feature found in MAX6826–MAX6828 variants. The 2.5V threshold is optimized for monitoring common I/O or analog supply rails.
Does MAX6829SHUT+T support manual reset functionality?
Yes, MAX6829SHUT+T includes a dedicated MR (manual reset) input on Pin 3 with an internal 50kΩ pullup resistor to VCC. Pulling MR low asserts the active-low RESET output for the full reset timeout period (≥140ms), then maintains reset for the timeout duration after MR returns high. No external components are needed-simply connect a momentary switch from MR to GND for field service reset capability.
What is the watchdog timeout period for MAX6829SHUT+T, and how is it cleared?
The MAX6829SHUT+T features a nominal 1.6s watchdog timeout period (0.8s–2.6s over temperature), cleared by any rising or falling edge on the WDI pin (Pin 4). The internal timer also resets automatically when RESET is asserted or MR is pulled low. If WDI is left unconnected, the watchdog is disabled-the internal driver toggles WDI every ~1.4s, preventing timeout.
Can MAX6829SHUT+T operate reliably at VCC = +1.2V?
Yes, MAX6829SHUT+T is fully specified and guaranteed to operate correctly-including valid RESET assertion and release-with VCC as low as +1.2V over the full -40°C to +125°C temperature range. This ensures robust brownout protection in ultra-low-voltage battery systems where supply may dip below typical 1.8V logic thresholds during discharge or load transients.
What package type and RoHS status does MAX6829SHUT+T use?
MAX6829SHUT+T is supplied in a 6-pin SOT23 package (outline U6+1, land pattern 90-0175) with lead-free RoHS-compliant construction. The "+T" suffix explicitly denotes lead-free packaging per JEDEC J-STD-609, and the device meets Maxim Integrated's standard moisture sensitivity level (MSL) 1 rating for unlimited floor life at ≤30°C/60% RH.
MAX6829SHUT+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:
- 1.313V, 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
MAX6829SHUT+T FAQ
1.How can I place an order for MAX6829SHUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6829SHUT+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 MAX6829SHUT+T reliable?
The price and inventory of MAX6829SHUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6829SHUT+T is usually 5 days.
3.What payment methods are accepted for MAX6829SHUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6829SHUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6829SHUT+T?
MAX6829SHUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6829SHUT+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 MAX6829SHUT+T?
For technical support, including MAX6829SHUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6829SHUT+T requirements.
6.How does Aetrix verify that MAX6829SHUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6829SHUT+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 MAX6829SHUT+T meets industry standards.
7.What is the process for return or replacement of MAX6829SHUT+T?
All MAX6829SHUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6829SHUT+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 MAX6829SHUT+T part is unused and in its original packaging.
Return procedure for MAX6829SHUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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