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Analog Devices Inc./Maxim Integrated MAX6801UR40D2+T
- Part No.:
- MAX6801UR40D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR40D2+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6801UR40D2+T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in 3-pin SOT23 package, 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), 20ms minimum reset timeout, and guaranteed RESET validity down to VCC = 0.7V. It ensures reliable power-on/brownout reset for embedded controllers and portable systems.
For engineers reviewing the MAX6801UR40D2+T datasheet, MAX6801UR40D2+T pinout, MAX6801UR40D2+T application, or MAX6801UR40D2+T equivalent, key selection criteria include reset threshold accuracy, low 4–12µA supply current, immunity to fast VCC transients, push/pull output drive capability, and operation across -40°C to +125°C industrial temperature range.
Technical Context
The MAX6801UR40D2+T implements a precision bandgap-based reset comparator with factory-trimmed 4.00V threshold and hysteresis optimized for brownout detection. Its internal timing circuit generates a guaranteed-minimum 20ms reset pulse after VCC rises above threshold, independent of external components.
Designed for direct integration into space-constrained μP systems, it features push/pull RESET output capable of sourcing ≥500µA and sinking ≥1.2mA while maintaining VOL ≤0.4V at VCC ≥2.5V, and operates with full functionality down to VCC = 0.7V - enabling robust reset assertion during deep undervoltage conditions.
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 precise brownout detection without calibration |
| Reset Timeout Period | 20ms (min), 30ms (typ), 40ms (max) - guarantees sufficient hold time for μP initialization |
| Supply Current | 4µA (typ @ VCC=3.0V), 5µA (typ @ VCC=5.0V) - enables multi-year battery life in portable equipment |
| VCC Operating Range | 0.7V to 5.5V - supports valid RESET assertion even during severe supply sag |
| Output Type | Active-low push/pull - drives standard CMOS inputs directly without pull-up resistor |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Package | 3-pin SOT23 - footprint compatible with MAX809/MAX6326/MAX6346 families for drop-in replacement |
Pinout & Package
MAX6801UR40D2+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected to system ground plane for noise immunity |
| 2 (RESET) | Active-low reset output | Push/pull driver asserts logic-low during VCC fault and remains low for ≥20ms after recovery; sinks ≥1.2mA at VCC ≥2.5V |
| 3 (VCC) | Supply voltage input | Power source for internal circuitry; monitored for reset generation; accepts 0.7V–5.5V with full functionality |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.00V with ±1.8% tolerance at +25°C eliminates need for external resistive divider or trimming |
| Ultra-low quiescent current | 4–12µA across VCC range enables use in always-on battery-backed systems without significant drain |
| Transient-immune reset comparator | Rejects VCC glitches <30µs at 100mV overdrive - prevents false resets during switching noise |
| Guaranteed operation to 0.7V | RESET remains valid and functional even as VCC collapses below 1.0V - critical for fail-safe shutdown |
| Three timeout options | 1ms/20ms/100ms min selectable via part number suffix (D1/D2/D3) - matches μP startup timing requirements |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing and brownout protection in programmable logic controllers operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 μP during AC line sags or EMI-induced VCC dips. Use Value: Prevents firmware corruption by holding μP in reset until VCC stabilizes above 4.00V for ≥20ms - validated across -40°C to +125°C. | Use Scenario: Battery-powered vital-sign monitors requiring multi-year shelf life and reliable wake-from-sleep reset behavior. IC Role / Device Role / Timing Role: Reset generator ensuring clean boot after Li-ion battery voltage recovers from deep discharge (<1.0V). Use Value: 4µA typical supply current extends battery service life; 0.7V minimum VCC operation guarantees reset assertion even during final battery depletion. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Cold-cranking and load-dump resilience in 12V automotive body electronics exposed to -40°C ambient. IC Role / Device Role / Timing Role: Monitoring 5V LDO output feeding CAN transceiver and microcontroller; asserting RESET on 12V battery dip below 10V. Use Value: -40°C to +125°C qualification and 4.00V threshold ensure deterministic reset during engine start; push/pull output drives CAN controller's active-low reset pin directly. | Use Scenario: Tamper-resistant electricity meter with EEPROM data integrity protection during mains interruption. IC Role / Device Role / Timing Role: Detecting AC dropout and initiating controlled shutdown sequence before backup capacitor depletes below safe write voltage. Use Value: 20ms minimum timeout provides adequate window for EEPROM page write completion; 3-pin SOT23 saves PCB area in sealed meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | Same 3-pin SOT23, 4.00V threshold, but 2.5V–5.5V VCC range and 140ms timeout; higher 12µA ICC | Designed for legacy systems requiring longer reset hold time; lacks 0.7V operation guarantee | Select when longer timeout is required and VCC never falls below 2.5V |
| MAX6326UT40D2+T | Same 4.00V threshold, 20ms timeout, and 0.7V operation; adds manual reset input (MR) pin | Supports external reset initiation (e.g., watchdog timeout or front-panel button); requires 4-pin layout | Select when system-level reset coordination beyond VCC monitoring is needed |
Compared with MAX809TRD2+T and MAX6326UT40D2+T, the MAX6801UR40D2+T offers the lowest operating voltage (0.7V) and lowest quiescent current (4µA), making it optimal for ultra-low-power brownout detection where board space and battery life are critical - but lacks manual reset capability and has fixed timeout.
Availability
MAX6801UR40D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6801UR40D2+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 high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing applications.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, single-function μP supervisory circuits with factory-trimmed thresholds and minimal external components - targeting cost-sensitive, space-constrained embedded systems needing reliable power monitoring.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6801UR40D2+T?
The MAX6801UR40D2+T has a factory-trimmed nominal reset threshold of 4.00V, with ±1.8% tolerance at +25°C and ±3% tolerance over the full -40°C to +125°C operating temperature range. This value is confirmed in Table 1 of the datasheet and applies specifically to the "40" suffix variant. The MAX6801UR40D2+T uses this precise threshold to initiate reset when VCC falls below 4.00V and release it only after VCC remains above that level for the timeout period.
Does MAX6801UR40D2+T support operation at VCC below 1.0V, and what is its behavior?
Yes, the MAX6801UR40D2+T is guaranteed to maintain correct RESET state down to VCC = 0.7V, per Absolute Maximum Ratings and Electrical Characteristics tables. Below 1.0V, its push/pull output retains defined logic levels: RESET remains asserted (low) while VCC is below threshold, and the output continues to sink current (≥50µA at VCC ≥1.0V, with reduced but functional drive down to 0.7V). This ensures fail-safe behavior during deep brownouts where other supervisors may release reset prematurely.
What is the reset timeout period for MAX6801UR40D2+T, and how is it implemented?
The MAX6801UR40D2+T provides a guaranteed minimum reset timeout period of 20ms, with typical value of 30ms and maximum of 40ms. This is a factory-programmed, internally generated delay that begins when VCC rises above the 4.00V threshold and holds RESET low for the full duration - no external capacitor or resistor is required. The "D2" in the part number explicitly denotes the 20ms option, distinguishing it from D1 (1ms) and D3 (100ms) variants in the same family.
Is MAX6801UR40D2+T pin-compatible with other supervisory ICs, and which ones?
Yes, the MAX6801UR40D2+T is pin-compatible with the MAX809/MAX810 series, MAX6326/MAX6327/MAX6328 family, and MAX6346/MAX6347/MAX6348 devices - all using the same 3-pin SOT23 footprint with identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments. This allows direct replacement in existing layouts without PCB modification, provided the reset threshold, timeout, and output type match system requirements. The MAX6801UR40D2+T shares this mechanical and electrical pinout compatibility across the entire MAX6800/6801/6802 family.
What is the supply current consumption of MAX6801UR40D2+T at different VCC levels?
The MAX6801UR40D2+T draws 4µA typical supply current at VCC = +3.0V and 5µA typical at VCC = +5.0V, with maximum values of 10µA and 12µA respectively. These values are measured with no load on the RESET pin and represent total device ICC - including comparator, timer, and output stage bias. This ultra-low current enables use in battery-powered applications where multi-year operational life is required, and is significantly lower than alternatives like the MAX809 (12µA typical).
MAX6801UR40D2+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 Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR40D2+T FAQ
1.How can I place an order for MAX6801UR40D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR40D2+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 MAX6801UR40D2+T reliable?
The price and inventory of MAX6801UR40D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR40D2+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR40D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR40D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR40D2+T?
MAX6801UR40D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR40D2+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 MAX6801UR40D2+T?
For technical support, including MAX6801UR40D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR40D2+T requirements.
6.How does Aetrix verify that MAX6801UR40D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR40D2+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 MAX6801UR40D2+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR40D2+T?
All MAX6801UR40D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR40D2+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 MAX6801UR40D2+T part is unused and in its original packaging.
Return procedure for MAX6801UR40D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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