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Analog Devices Inc./Maxim Integrated MAX6801UR26D2+T
- Part No.:
- MAX6801UR26D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR26D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
MAX6801UR26D2+T from Maxim Integrated is a precision 2.63V reset supervisor IC with push/pull active-low RESET output, 20ms minimum timeout, and guaranteed operation down to 0.7V VCC. It monitors power supplies in microprocessor systems, asserts reset during brownout or power-up, and holds reset for ≥20ms after VCC recovers-used in battery-powered controllers and industrial embedded systems requiring reliable low-voltage supervision.
For engineers reviewing the MAX6801UR26D2+T datasheet, MAX6801UR26D2+T pinout, MAX6801UR26D2+T application, or MAX6801UR26D2+T equivalent, key selection criteria include reset threshold accuracy (±3% over -40°C to +125°C), ultra-low 4µA supply current at 3V, SOT23-3 package compatibility, and push/pull drive capability supporting direct interface to µP reset inputs without external pull-up.
Technical Context
The MAX6801UR26D2+T implements a factory-trimmed bandgap-based reset comparator with 2.63V nominal threshold, ±1.8% tolerance at +25°C and ±3% over full temperature range. Its internal timing circuit generates a precise 20ms (min) reset pulse width after VCC rises above VTH, independent of supply voltage variation.
Designed for robustness in noisy environments, the device rejects fast VCC transients via comparator hysteresis and propagation delay filtering; it remains functional with VCC as low as 0.7V and guarantees valid RESET assertion state across the entire operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±3% over -40°C to +125°C - ensures reliable brownout detection at defined supply margin |
| Reset Timeout Period | 20ms (min) - provides sufficient hold time for µP initialization before release |
| Supply Voltage Range | 0.7V to 5.5V - enables operation during deep brownout and supports 3.3V/5V systems |
| Supply Current | 4µA (typ) at VCC = 3.0V - minimizes battery drain in portable equipment |
| RESET Output Type | Push/pull active-low - drives µP reset pin directly without external pull-up resistor |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VOL (ISINK = 50µA) | 0.4V max - ensures solid logic-low level even at low VCC ≥1.0V |
Pinout & Package
MAX6801UR26D2+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage; must be connected to system ground plane |
| 2 | RESET | Active-low push/pull output; sinks current when asserted, sources weakly when released - interfaces directly to µP reset input |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference - requires local 0.1µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±3% tolerance over full temperature range - eliminates calibration components and improves BOM consistency |
| Ultra-low quiescent current | 4µA typical at 3V - extends battery life in always-on monitoring applications |
| Guaranteed reset validity to 0.7V VCC | Ensures deterministic reset behavior during deep undervoltage conditions where most µPs fail to operate |
| Transient-immune reset comparator | Rejects VCC glitches ≤30µs at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Three standard timeout options | 1ms/20ms/100ms min - allows matching reset hold time to specific µP boot requirements |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Power cycling and brownout events in factory-floor programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring µP reinitialization only after stable VCC recovery. Use Value: Prevents corrupted firmware execution by enforcing ≥20ms reset hold time aligned with controller boot sequence. | Use Scenario: Intermittent solar/battery charging causing repeated VCC dips in remote environmental sensors. IC Role / Device Role / Timing Role: Low-voltage detector asserting reset below 2.63V and holding for ≥20ms post-recovery. Use Value: Enables reliable wake-up from deep sleep without data loss, leveraging 4µA supply current and 0.7V operation. |
| Automotive Body Control Modules | Medical Portable Diagnostic Devices |
Use Scenario: Load-dump and cold-crank transients in 12V-derived 3.3V subsystems. IC Role / Device Role / Timing Role: Immune reset supervisor rejecting <30µs VCC glitches while asserting clean reset on sustained undervoltage. Use Value: Maintains system integrity during engine start-up by avoiding false resets, validated over -40°C to +125°C. | Use Scenario: Single-cell Li-ion powered handheld analyzers requiring fail-safe boot sequencing. IC Role / Device Role / Timing Role: Precision 2.63V threshold supervisor enabling safe operation down to battery end-of-discharge (~2.7V). Use Value: Guarantees controlled shutdown before critical voltage collapse, using factory-trimmed threshold and no external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.93V reset threshold, same SOT23-3 package and push/pull output | Higher threshold better suited for 3.3V systems with tighter margin; not suitable for 2.63V brownout detection | Select when system VCC nominal is ≥3.0V and brownout detection at ~2.9V is required |
| TPS3801K33DBVR | 3.08V threshold, 200ms min timeout, 1.8V–6V VCC range, open-drain output | Requires external pull-up; longer timeout suits slower µPs; wider VCC range supports higher-voltage rails | Choose for designs needing extended reset hold or interfacing with bidirectional µP reset pins |
Compared with MAX809TRD2+T and TPS3801K33DBVR, the MAX6801UR26D2+T offers the lowest reset threshold (2.63V) and lowest quiescent current (4µA), making it optimal for early brownout detection and ultra-low-power battery systems - but requires push/pull-compatible µP inputs.
Availability
MAX6801UR26D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6801UR26D2+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.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, factory-trimmed reset supervision for microprocessor systems - engineered to replace discrete reset circuits with high reliability and minimal board area.
FAQ
What is the exact reset threshold voltage of MAX6801UR26D2+T and how tightly is it specified?
The MAX6801UR26D2+T has a nominal reset threshold of 2.63V, factory-trimmed with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating temperature range. This specification is guaranteed per Electrical Characteristics table in the official datasheet, ensuring consistent brownout detection across environmental conditions without external calibration.
Does MAX6801UR26D2+T support operation at very low supply voltages, and what is the minimum functional VCC?
Yes, MAX6801UR26D2+T is guaranteed to maintain correct RESET assertion state down to VCC = 0.7V, with full functionality including comparator accuracy and output drive strength validated to 0.78V at -40°C to +125°C. This enables reliable supervision during deep brownout conditions where many µPs cease operation.
What is the reset timeout period of MAX6801UR26D2+T, and is it adjustable?
The MAX6801UR26D2+T features a fixed 20ms minimum reset timeout period (tRP), factory-programmed and non-adjustable. This value is guaranteed across temperature and supply voltage, providing predictable hold time for microprocessor initialization without requiring external timing components.
How does the push/pull output of MAX6801UR26D2+T differ from open-drain alternatives like MAX6802?
The MAX6801UR26D2+T uses a push/pull active-low RESET output capable of both sinking and sourcing current, allowing direct connection to µP reset inputs without an external pull-up resistor. In contrast, open-drain variants require a pull-up and cannot actively drive high - making MAX6801UR26D2+T simpler to integrate in standard µP interfaces.
Is MAX6801UR26D2+T RoHS-compliant and available in lead-free packaging?
Yes, MAX6801UR26D2+T is RoHS-compliant and supplied in lead-free packaging, indicated by the "+T" suffix per Maxim's ordering convention. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering up to +260°C, with full traceability and compliance documentation available upon request.
MAX6801UR26D2+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6801UR26D2+T FAQ
1.How can I place an order for MAX6801UR26D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR26D2+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 MAX6801UR26D2+T reliable?
The price and inventory of MAX6801UR26D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR26D2+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR26D2+T?
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MAX6801UR26D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR26D2+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 MAX6801UR26D2+T?
For technical support, including MAX6801UR26D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR26D2+T requirements.
6.How does Aetrix verify that MAX6801UR26D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR26D2+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 MAX6801UR26D2+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR26D2+T?
All MAX6801UR26D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR26D2+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 MAX6801UR26D2+T part is unused and in its original packaging.
Return procedure for MAX6801UR26D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6801UR26D2+T Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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