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Analog Devices Inc./Maxim Integrated MAX6801UR46D2+T
- Part No.:
- MAX6801UR46D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR46D2+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
MAX6801UR46D2+T from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-3 package, providing active-low push/pull reset assertion when VCC drops below 4.63V (±1.8% at +25°C), with guaranteed operation down to 0.7V and a 20ms minimum reset timeout period. It monitors power supplies in embedded controllers and portable equipment requiring reliable brownout detection.
For engineers reviewing the MAX6801UR46D2+T datasheet, MAX6801UR46D2+T pinout, MAX6801UR46D2+T application, or MAX6801UR46D2+T equivalent, key selection criteria include reset threshold accuracy over temperature, ultra-low 4–12µA supply current, VCC operating range down to 0.7V, and compatibility with bidirectional µP reset pins via push/pull drive capability.
Technical Context
The MAX6801UR46D2+T uses a factory-trimmed bandgap-based voltage comparator to detect VCC falling below its 4.63V threshold, with ±3% tolerance across –40°C to +125°C. Its internal timer ensures a minimum 20ms reset pulse width after VCC recovers above threshold.
It features push/pull output structure enabling direct drive of CMOS inputs without external pull-up resistors, and includes transient immunity circuitry that rejects fast VCC glitches - e.g., ≤30µs negative transients at 100mV overdrive do not trigger false resets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures precise brownout detection for 5V systems |
| Reset Timeout Period | 20ms (min), 30ms (typ), 40ms (max) - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - enables valid reset assertion during deep brownout and full-system power sequencing |
| Supply Current | 4µA (typ at 3.0V), 5µA (typ at 5.0V) - minimizes battery drain in portable applications |
| RESET Output Low Voltage | 0.4V max at ISINK = 50µA, VCC ≥ 1.0V - ensures solid logic-low level for µP reset input even at low VCC |
| VCC Falling Propagation Delay | 30µs - provides rapid response to supply collapse without excessive delay |
| Operating Temperature | –40°C to +125°C - supports industrial and automotive under-hood environments |
Pinout & Package
MAX6801UR46D2+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane for accurate threshold sensing |
| 2 | RESET | Active-low push/pull reset output; drives low during VCC undervoltage and remains low for 20ms after VCC recovery |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference; operates down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reset Threshold | Factory-trimmed 4.63V with ±1.8% initial accuracy and ±3% tempco - eliminates need for external resistor dividers or calibration |
| Ultra-Low Supply Current | 4–12µA across VCC and temperature - extends battery life in always-on monitoring circuits |
| Guaranteed Operation to 0.7V | RESET remains valid while VCC decays to 0.7V - ensures deterministic reset behavior during complete power collapse |
| Transient Immunity | Rejects VCC glitches ≤30µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Push/Pull Output Structure | No external pull-up required - simplifies interface to standard CMOS µP reset inputs and reduces BOM count |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered by unregulated 5V rails subject to load-induced sags and EMI-coupled transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt CPU execution until stable 5V is restored. Use Value: Prevents firmware corruption during brownout by holding µP in reset for ≥20ms after VCC exceeds 4.63V, with immunity to <30µs supply noise. | Use Scenario: Handheld glucose meters using coin-cell batteries where supply voltage drifts from 3.6V (fresh) to 2.2V (end-of-life). IC Role / Device Role / Timing Role: Power-on and brownout detector generating clean reset pulse independent of battery decay profile. Use Value: Maintains valid RESET output down to 0.7V VCC, enabling safe shutdown before data loss occurs at sub-2V operation. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: BCM microcontroller supplied from vehicle battery (9–16V) via LDO; subjected to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary reset supervisor ensuring µC remains held in reset during cold-crank events where VCC dips below 4.63V. Use Value: 20ms minimum timeout prevents premature release during slow VCC recovery typical of alternator re-engagement. | Use Scenario: Revenue-grade meter with isolated µP and real-time clock, requiring fail-safe reset during AC mains interruption and capacitor hold-up decay. IC Role / Device Role / Timing Role: Secondary supervisor monitoring backup supply rail derived from supercapacitor discharge. Use Value: 4.63V threshold aligns with supercap voltage decay curve, triggering reset before RTC or memory corruption occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | Same SOT23-3 package, 4.63V threshold, but 140ms min timeout and higher 12µA ICC | Designed for slower power-up sequences; less suitable for fast-recovery systems | Select when longer reset hold time is required and supply current is not critical |
| TPS3808G33DBVR | 3.3V fixed threshold, adjustable timeout (200ms/400ms), 1.1µA ICC, SOT23-5 | Requires external timing capacitor; lower quiescent current but different pinout and threshold | Select for ultra-low-power designs where 3.3V threshold matches system rail and layout allows 5-pin placement |
Compared with MAX809TRD2+T and TPS3808G33DBVR, the MAX6801UR46D2+T offers the optimal balance of precise 4.63V threshold, 20ms deterministic timeout, sub-12µA supply current, and true push/pull drive - making it ideal for 5V microcontroller systems needing fast, reliable, and low-footprint reset supervision.
Availability
MAX6801UR46D2+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6801UR46D2+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 communications applications.
The MAX6800/MAX6801/MAX6802 family delivers precision, low-power microprocessor supervisory functions - designed specifically for space-constrained, battery-sensitive, and thermally demanding embedded systems requiring deterministic reset behavior.
FAQ
What is the exact reset threshold voltage of MAX6801UR46D2+T and how does it vary with temperature?
The MAX6801UR46D2+T has a nominal reset threshold of 4.63V at +25°C, with ±1.8% initial tolerance. Over the full operating temperature range of –40°C to +125°C, the threshold varies by ±3%, meaning it stays within 4.491V to 4.769V. This tight specification ensures consistent brownout detection across environmental conditions without external trimming.
Does MAX6801UR46D2+T require an external pull-up resistor on the RESET pin?
No, MAX6801UR46D2+T does not require an external pull-up resistor because it features a push/pull output structure. The RESET pin actively drives low during reset assertion and actively drives high (to ~0.8×VCC) when deasserted, eliminating reliance on external components for logic-level definition - a key advantage over open-drain alternatives like the MAX6802 series.
What is the minimum VCC voltage at which MAX6801UR46D2+T guarantees valid RESET output behavior?
The MAX6801UR46D2+T guarantees correct RESET output state down to VCC = 0.7V across the full temperature range. At this voltage, the device continues to assert RESET low when VCC falls below 4.63V and maintains proper timing and logic levels - critical for fail-safe operation during deep brownout or battery depletion scenarios.
How does the 20ms reset timeout of MAX6801UR46D2+T compare to other versions in the MAX6801 family?
The "D2" suffix in MAX6801UR46D2+T specifies a 20ms minimum reset timeout period (30ms typ, 40ms max). Other variants include D1 (1ms min) for fast-boot systems and D3 (100ms min) for slower power-up sequences. All share identical threshold (4.63V) and package, allowing design reuse with only timeout adjustment via part number selection.
Is MAX6801UR46D2+T pin-compatible with industry-standard reset supervisors like the MAX809 series?
Yes, MAX6801UR46D2+T is pin-compatible with MAX809/MAX810 and several other supervisory families including MAX6326–MAX6328 and MAX6346–MAX6348. All use the same SOT23-3 pinout (GND, RESET, VCC), enabling drop-in replacement in existing layouts - provided the reset threshold and timeout requirements align with the target application.
MAX6801UR46D2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6801UR46D2+T FAQ
1.How can I place an order for MAX6801UR46D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR46D2+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 MAX6801UR46D2+T reliable?
The price and inventory of MAX6801UR46D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR46D2+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR46D2+T?
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4.How is shipping managed for MAX6801UR46D2+T?
MAX6801UR46D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR46D2+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 MAX6801UR46D2+T?
For technical support, including MAX6801UR46D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR46D2+T requirements.
6.How does Aetrix verify that MAX6801UR46D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR46D2+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 MAX6801UR46D2+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR46D2+T?
All MAX6801UR46D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR46D2+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 MAX6801UR46D2+T part is unused and in its original packaging.
Return procedure for MAX6801UR46D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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