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Analog Devices Inc./Maxim Integrated MAX6801UR33D1+T
- Part No.:
- MAX6801UR33D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR33D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,621
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Product details
Overview
MAX6801UR33D1+T from Maxim Integrated is a precision 3.3V microprocessor supervisory circuit in SOT23-3 package, featuring push/pull active-low RESET output, 1ms minimum reset timeout, factory-trimmed 3.30V reset threshold (±3% over -40°C to +125°C), ultra-low 4µA supply current at 3V, and guaranteed valid reset assertion down to VCC = 0.7V. It monitors power integrity in battery-powered microcontroller systems requiring reliable brownout detection and clean power-on reset.
For engineers reviewing the MAX6801UR33D1+T datasheet, MAX6801UR33D1+T pinout, MAX6801UR33D1+T application, or MAX6801UR33D1+T equivalent, key selection criteria include its 3.3V reset threshold accuracy, 1ms timeout timing, push/pull drive capability (100nA sink), SOT23-3 footprint compatibility with legacy supervisors, and operation across automotive-grade temperature range (-40°C to +125°C).
Technical Context
The MAX6801UR33D1+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 3.30V ±3%, asserting an active-low RESET signal until VCC rises above threshold and remains stable for ≥1ms. Its internal timing circuit uses RC-based delay with temperature compensation to maintain timeout accuracy across -40°C to +125°C.
This device operates as a standalone reset generator with no external components required-its push/pull output drives CMOS inputs directly without pull-up resistors, and its 0.7V minimum operating voltage ensures reset validity during deep brownout conditions where most µPs cease functional operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.30V ±3% over -40°C to +125°C - ensures accurate 3.3V rail monitoring with guaranteed trip point across full industrial/automotive temperature range |
| Reset Timeout Period | 1ms minimum - provides sufficient deassertion delay for 3.3V µP power stabilization after cold start or transient recovery |
| Supply Current | 4µA typical at VCC = 3.0V - enables multi-year battery life in portable instrumentation and remote sensors |
| Operating Voltage Range | 0.7V to 5.5V - guarantees correct RESET/RESET state down to near-zero VCC, critical for fail-safe brownout response |
| Output Type | Push/pull active-low - eliminates need for external pull-up resistor and supports direct interface to standard CMOS reset inputs |
| VOL (RESET asserted) | 0.4V max at ISINK = 50µA, VCC ≥ 1.0V - ensures solid logic-low level even under weak supply conditions |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial control, and high-reliability embedded applications |
Pinout & Package
MAX6801UR33D1+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 0.8mm footprint and 0.95mm height - compatible with high-density PCB layouts and automated assembly.
| 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 and accurate threshold sensing |
| 2 (RESET) | Active-low push/pull reset output | Drives low during VCC undervoltage or timeout; actively pulls high when deasserted - no external pull-up needed for standard µP reset inputs |
| 3 (VCC) | Supply voltage input | Monitored power rail input; powers internal circuitry and defines reset threshold reference - requires local 0.1µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.30V reset threshold | Factory-trimmed to ±3% over full temperature range - eliminates manual calibration and improves BOM consistency in 3.3V systems |
| 1ms minimum reset timeout | Guaranteed minimum pulse width ensures µP clock and supply stabilization before release - prevents premature execution on marginal rails |
| 0.7V minimum operating voltage | Valid RESET assertion down to VCC = 0.7V - maintains deterministic reset behavior during deep brownout, avoiding undefined µP states |
| 4µA supply current at 3V | Enables >10-year battery life in always-on monitoring circuits - critical for IoT edge nodes and portable medical devices |
| Transient-immune comparator | Rejects VCC glitches ≤30µs at 100mV overdrive - prevents false resets from switching noise or ESD-induced supply dips |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3V MCU supply in programmable logic controllers exposed to wide ambient temperatures and electrical noise. IC Role / Device Role / Timing Role: Standalone reset supervisor providing power-on reset and brownout protection for ARM Cortex-M4-based controller. Use Value: Guarantees clean boot sequence after line transients and maintains reset assertion during 12V battery dip to 9V, preventing firmware corruption. |
Use Scenario: Supervises 3.3V domain powering CAN transceivers and door-lock microcontrollers in vehicle body electronics. IC Role / Device Role / Timing Role: Primary reset source ensuring MCU enters safe state during ignition cycling and load-dump events. Use Value: 1ms timeout aligns with automotive power-rail stabilization time; -40°C to +125°C rating meets AEC-Q100 Grade 2 requirements. |
| Portable Medical Sensor | Smart Energy Meter |
Use Scenario: Powers continuous glucose monitor with coin-cell battery and low-power BLE SoC requiring deterministic startup. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling reliable wake-up from deep sleep after power interruption. Use Value: 4µA ICC extends battery life beyond 3 years; 3.30V threshold matches SoC VDDIO specification precisely. |
Use Scenario: Ensures metrology SoC and RTC retain valid state during AC mains dropout or surge events. IC Role / Device Role / Timing Role: Dual-role supervisor - asserts reset on main 3.3V rail failure and holds backup domain in known state. Use Value: Push/pull output drives both primary µP and secondary watchdog IC simultaneously without level-shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD1+T | 3.3V threshold, 1ms timeout, push/pull active-low, but higher 12µA ICC at 3V and only specified to +85°C | Limited to commercial/industrial temp range; less suitable for under-hood or extended-temperature deployments | Select when cost sensitivity outweighs extended temperature or ultra-low current requirements |
| TPS3801K33DBVR | 3.3V threshold, 200ms timeout (fixed), open-drain output, 1.6µA ICC - requires external pull-up and longer timeout | Open-drain architecture suits bidirectional reset pins but adds component count and timing uncertainty | Choose when interfacing with µPs requiring open-drain reset (e.g., certain MSP430 variants) and longer timeout is acceptable |
Compared with MAX809TRD1+T and TPS3801K33DBVR, the MAX6801UR33D1+T delivers superior temperature coverage (-40°C to +125°C), lowest quiescent current in its class (4µA), and true push/pull drive eliminating external components - making it optimal for space-constrained, battery-sensitive, and automotive-qualified designs.
Availability
MAX6801UR33D1+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical sensors, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6801UR33D1+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 analog, mixed-signal, and power-management ICs for high-reliability applications.
The MAX6800/MAX6801/MAX6802 family was designed specifically for space-constrained, low-power microprocessor supervision in automotive, industrial, and portable systems - delivering precision reset thresholds, ultra-low current, and guaranteed operation down to 0.7V.
FAQ
What is the exact reset threshold voltage of MAX6801UR33D1+T and how tightly is it specified?
The MAX6801UR33D1+T has a factory-trimmed nominal reset threshold of 3.30V, with tolerance of ±3% over the full operating temperature range of -40°C to +125°C. At +25°C, the threshold is specified as 3.30V ±1.8%, per Table 1 and Electrical Characteristics. This precision eliminates need for external adjustment and ensures consistent behavior across production units and environmental conditions in 3.3V systems.
Does MAX6801UR33D1+T require any external components to function correctly?
No, the MAX6801UR33D1+T requires no external components for basic operation. Its push/pull active-low RESET output drives standard CMOS inputs directly without a pull-up resistor. A 0.1µF ceramic bypass capacitor on the VCC pin is recommended for noise suppression but not strictly required for functionality. The device integrates all timing, reference, and comparator circuitry internally.
What is the minimum supply voltage at which MAX6801UR33D1+T guarantees correct reset assertion?
The MAX6801UR33D1+T guarantees correct RESET assertion and deassertion behavior down to VCC = 0.7V, as confirmed in Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset signaling during deep brownout events - critical for preventing undefined microprocessor states in battery-powered or unstable power environments.
How does the 1ms reset timeout of MAX6801UR33D1+T compare to other timeout options in the MAX680x family?
The "D1" suffix in MAX6801UR33D1+T denotes the 1ms minimum reset timeout variant - the shortest option available in the family. Other variants include D2 (20ms min) and D3 (100ms min). The 1ms version is optimized for fast-booting µPs and systems where rapid recovery from brief transients is required, while maintaining sufficient margin for power-rail stabilization.
Is MAX6801UR33D1+T pin-compatible with legacy supervisory ICs like the MAX809 series?
Yes, the MAX6801UR33D1+T is explicitly stated in the datasheet as pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 - all in the same 3-pin SOT23 package. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC. This allows drop-in replacement in existing designs without PCB modification.
MAX6801UR33D1+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:
- 3.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR33D1+T FAQ
1.How can I place an order for MAX6801UR33D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR33D1+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 MAX6801UR33D1+T reliable?
The price and inventory of MAX6801UR33D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR33D1+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR33D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR33D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR33D1+T?
MAX6801UR33D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR33D1+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 MAX6801UR33D1+T?
For technical support, including MAX6801UR33D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR33D1+T requirements.
6.How does Aetrix verify that MAX6801UR33D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR33D1+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 MAX6801UR33D1+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR33D1+T?
All MAX6801UR33D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR33D1+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 MAX6801UR33D1+T part is unused and in its original packaging.
Return procedure for MAX6801UR33D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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