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Analog Devices Inc./Maxim Integrated MAX6800UR40D3+T
- Part No.:
- MAX6800UR40D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR40D3+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,313
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Product details
Overview
MAX6800UR40D3+T from Maxim Integrated is a precision push/pull active-high microprocessor supervisory circuit in 3-pin SOT23 packaging, monitoring VCC from 2.85V to 5.0V with factory-trimmed 4.00V reset threshold (±1.8% at +25°C, ±3% over -40°C to +125°C), 100ms minimum reset timeout, and guaranteed RESET validity down to VCC = 0.7V - used for reliable power-on/brownout reset assertion in embedded controllers and portable equipment.
For engineers reviewing the MAX6800UR40D3+T datasheet, MAX6800UR40D3+T pinout, MAX6800UR40D3+T application, or MAX6800UR40D3+T equivalent, key selection criteria include active-high output logic, 4.0V threshold tolerance across temperature, ultra-low 4–12µA supply current, and compatibility with space-constrained 3-pin SOT23 layouts requiring no external components.
Technical Context
The MAX6800UR40D3+T implements a precision bandgap-based reset comparator with factory-trimmed 4.00V threshold and hysteresis optimized for immunity to fast VCC transients (e.g., <30µs glitches at 10mV overdrive). Its push/pull output drives high during reset assertion, sourcing up to 800µA at VCC ≥ 4.25V while maintaining VOH ≥ 0.8 × VCC.
Reset timeout is fixed at 100ms (min) via internal RC timing, fully specified from -40°C to +125°C with <±10% variation over temperature. The device operates continuously down to VCC = 0.7V and guarantees valid RESET output state across this full voltage range, enabling robust low-voltage brownout detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures accurate brownout detection without external calibration |
| Reset Timeout Period | 100ms (min) - provides sufficient hold time for microprocessor initialization after power stabilization |
| Supply Current | 4µA (typ) at VCC = +3.0V; 5µA (typ) at VCC = +5.0V - enables multi-year battery life in portable systems |
| Operating Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and full-system power-up sequencing |
| Output Type | Push/pull active-high RESET - eliminates need for external pullup resistor and simplifies interface to µP reset inputs |
| VCC Transient Immunity | Rejects negative-going transients ≤30µs at 10mV overdrive - prevents false resets from noise or switching spikes |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint ideal for space-constrained PCBs with standard reflow compatibility |
Pinout & Package
MAX6800UR40D3+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with top-mark "FZIH" indicating 4.38V threshold variant - however, per Selector Guide and Table 1, suffix "40" corresponds to 4.00V nominal threshold and "D3" denotes 100ms timeout; actual top-mark for MAX6800UR40D3+T is "FZIG" (confirmed by Maxim ordering matrix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance to ensure reset accuracy |
| 2 (RESET) | Active-high push/pull reset output | Drives high during reset assertion; sinks current when inactive; interfaces directly to µP reset input without pullup |
| 3 (VCC) | Supply voltage input | Monitored rail input; powers internal circuitry and defines output voltage levels; accepts 0.7V–5.5V range |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.00V threshold | Eliminates external resistor network and reduces BOM count while maintaining ±3% accuracy over full industrial temperature range |
| 100ms minimum reset timeout | Guarantees µP core and peripherals remain held in reset long enough for stable clock and memory initialization |
| 0.7V operating minimum | Enables valid reset assertion even during severe brownout conditions where VCC collapses below 1.0V |
| 4µA typical supply current | Reduces quiescent power draw in always-on monitoring circuits, critical for battery-backed or energy-harvesting systems |
| Transient-immune comparator | Rejects sub-30µs VCC dips - avoids spurious resets caused by digital switching noise or LDO ripple |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power supply monitoring in DIN-rail mounted programmable logic controllers subjected to wide-input DC supplies and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M7 MCU during 24VDC input brownout or surge-induced rail collapse. Use Value: Guaranteed RESET validity down to VCC = 0.7V prevents runaway code execution during undervoltage faults, improving functional safety compliance. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring >5-year shelf life and reliable wake-from-sleep reset sequencing. IC Role / Device Role / Timing Role: Primary reset supervisor triggering controlled boot of ultra-low-power MSP430 microcontroller after Li-ion battery recharge or cold start. Use Value: 4µA supply current extends battery runtime; 100ms timeout ensures complete analog front-end stabilization before ADC sampling begins. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: Reset management in 12V automotive subsystems exposed to load-dump transients and cold-crank voltage sags. IC Role / Device Role / Timing Role: Brownout detector interfacing to Infineon AURIX TC3xx safety MCU via dedicated reset pin with active-high logic polarity. Use Value: Push/pull output eliminates external pullup resistor, reducing component count and PCB area in ASIL-B compliant designs. |
Use Scenario: Tamper-resistant electricity meter with isolated power rails and dual-supply monitoring (main + backup supercapacitor). IC Role / Device Role / Timing Role: Primary VDD supervisor asserting reset to metrology SoC during main AC/DC converter failure or capacitor discharge. Use Value: Factory-trimmed 4.00V threshold matches common 3.3V logic rail tolerances, ensuring precise trip point without calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | Active-low push/pull output; 3.08V reset threshold; same SOT23-3 package and 100ms timeout | Requires inverted reset logic handling in µP firmware or external inverter; suited for legacy designs using active-low reset architecture | Select when existing board layout uses active-low reset signaling and threshold tolerance allows 3.08V trip point |
| TLV803EC26DBZR | Active-high push/pull; 2.63V threshold; 200ms min timeout; 1.8V–6V VCC range; lower 0.9µA ICC | Better ultra-low-power performance but lower threshold limits use in 3.3V/5V systems without margin; not qualified to -40°C to +125°C | Prefer for battery-powered IoT nodes needing sub-1µA monitoring, but avoid in extended-temperature industrial applications |
Compared with MAX809TRD3+T and TLV803EC26DBZR, the MAX6800UR40D3+T uniquely combines 4.00V precision threshold, 100ms timeout, active-high output, and full -40°C to +125°C qualification - making it optimal for new 3.3V/5V controller designs demanding tight voltage-margin supervision without logic inversion or derating.
Availability
MAX6800UR40D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6800UR40D3+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 industrial, automotive, and computing applications - emphasizing reliability, integration, and thermal robustness.
The MAX6800 family delivers single-function, low-power µP supervisory circuits with factory-trimmed thresholds and fixed timeouts - engineered specifically for cost-sensitive, space-constrained embedded systems requiring guaranteed reset behavior under brownout and transient conditions.
FAQ
What is the exact reset threshold voltage of MAX6800UR40D3+T and how does it vary with temperature?
The MAX6800UR40D3+T has a nominal reset threshold of 4.00V at +25°C, with tolerance of ±1.8%. Over the full operating temperature range (-40°C to +125°C), the threshold shifts to ±3% (3.880V to 4.120V). This specification is factory-trimmed and guaranteed per Maxim's Electrical Characteristics table, eliminating need for external calibration.
Does MAX6800UR40D3+T require an external pullup resistor on its RESET pin?
No, MAX6800UR40D3+T does not require an external pullup resistor because it features a push/pull active-high output stage. The RESET pin actively drives high during reset assertion and sinks current when inactive - enabling direct connection to microprocessor reset inputs without additional components.
What is the minimum supply voltage at which MAX6800UR40D3+T guarantees valid RESET output behavior?
MAX6800UR40D3+T guarantees valid RESET output state down to VCC = 0.7V across the full temperature range. This is confirmed in both Absolute Maximum Ratings and Electrical Characteristics tables, ensuring reliable brownout detection even during deep undervoltage events before system shutdown.
How does the 100ms reset timeout of MAX6800UR40D3+T behave across temperature and supply voltage?
The reset timeout of MAX6800UR40D3+T is specified as 100ms (minimum) and remains stable across -40°C to +125°C with <±10% variation. It is internally generated and independent of VCC within the 0.7V–5.5V range, ensuring consistent reset hold time regardless of rail voltage or ambient conditions.
Is MAX6800UR40D3+T pin-compatible with other members of the MAX6800/MAX6801/MAX6802 family?
Yes, MAX6800UR40D3+T shares identical 3-pin SOT23 pinout (GND, RESET, VCC) and mechanical footprint with all MAX6800, MAX6801, and MAX6802 variants. However, output polarity differs: MAX6800UR40D3+T is active-high, while MAX6801/MAX6802 are active-low - requiring firmware or schematic review before substitution.
MAX6800UR40D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6800UR40D3+T FAQ
1.How can I place an order for MAX6800UR40D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR40D3+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 MAX6800UR40D3+T reliable?
The price and inventory of MAX6800UR40D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR40D3+T is usually 5 days.
3.What payment methods are accepted for MAX6800UR40D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR40D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR40D3+T?
MAX6800UR40D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR40D3+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 MAX6800UR40D3+T?
For technical support, including MAX6800UR40D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR40D3+T requirements.
6.How does Aetrix verify that MAX6800UR40D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6800UR40D3+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 MAX6800UR40D3+T meets industry standards.
7.What is the process for return or replacement of MAX6800UR40D3+T?
All MAX6800UR40D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR40D3+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 MAX6800UR40D3+T part is unused and in its original packaging.
Return procedure for MAX6800UR40D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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