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Analog Devices Inc./Maxim Integrated MAX6801UR31D3+T
- Part No.:
- MAX6801UR31D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR31D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
MAX6801UR31D3+T from Maxim Integrated is a 3-pin SOT23 push/pull active-low microprocessor supervisory circuit with factory-trimmed 3.08V reset threshold, 100ms minimum reset timeout, and guaranteed operation down to 0.7V VCC. It monitors power supplies in 2.85V–5.0V digital systems, asserts RESET during brownout/power-down, and holds it for ≥100ms after VCC recovers - used in portable battery-powered equipment requiring reliable power-on reset.
For engineers reviewing the MAX6801UR31D3+T datasheet, MAX6801UR31D3+T pinout, MAX6801UR31D3+T application, or MAX6801UR31D3+T equivalent, key selection criteria include reset threshold accuracy (±1.8% at +25°C), ultra-low 4µA supply current, transient-immune reset comparator, and compatibility with bidirectional µP reset pins via push/pull drive strength.
Technical Context
The MAX6801UR31D3+T implements a precision bandgap-based reset comparator with factory-trimmed 3.08V threshold (±3% over –40°C to +125°C) and built-in hysteresis to prevent chatter during slow VCC transitions. Its push/pull output delivers 1.2mA sink capability at VCC ≥ 2.5V with VOL ≤ 0.3V, enabling direct interface to CMOS inputs without external pull-up resistors.
Reset assertion is triggered by VCC falling below 3.08V and remains active for a guaranteed minimum 100ms after VCC rises above threshold, independent of temperature (normalized timeout variation < ±5% across –40°C to +125°C). The device operates continuously from 0.7V to 5.5V VCC and rejects transients ≤30µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.8% at +25°C; ±3% over full temperature range - ensures precise brownout detection for 3.3V systems |
| Reset Timeout Period | 100ms (min), 150ms (typ), 200ms (max) - guarantees sufficient hold time for µP initialization sequences |
| Supply Current | 4µA (typ) at VCC = 3.0V - enables multi-year battery life in always-on monitoring applications |
| VCC Operating Range | 0.7V to 5.5V - supports valid RESET assertion during deep brownout and full-system power ramp |
| RESET Output Type | Active-low push/pull - drives CMOS inputs directly; no external pull-up required; sinks 1.2mA at VCC ≥ 2.5V |
| Transient Immunity | Rejects VCC glitches ≤30µs at 100mV overdrive - prevents false resets from switching noise or ESD coupling |
| Temperature Range | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6801UR31D3+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 - optimized for space-constrained PCB layouts in portable electronics.
| 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 accurate threshold sensing |
| 2 (RESET) | Active-Low Push/Pull Output | Drives µP RESET pin low during fault; sources current when inactive (VOH ≥ 0.8×VCC); sinks 1.2mA when asserted (VOL ≤ 0.3V) |
| 3 (VCC) | Supply Input | Monitored power rail input; also powers internal circuitry; absolute max rating +6V; operates down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Precision Factory-Trimmed Threshold | 3.08V set at wafer level with ±1.8% tolerance at +25°C - eliminates calibration components and board-level trimming |
| Ultra-Low Quiescent Current | 4µA typical at 3.0V - reduces standby power in battery-backed systems by >95% vs. discrete reset solutions |
| Guaranteed Reset Validity to 0.7V | RESET remains asserted and electrically valid even as VCC collapses to 0.7V - ensures deterministic µP reset during severe brownout |
| Transient-Immune Comparator | Rejects fast negative-going VCC spikes up to 30µs duration - prevents false resets from DC-DC switching noise or ESD events |
| Three Timeout Options | 100ms minimum pulse width - matches boot-time requirements of ARM Cortex-M and RISC-V microcontrollers |
Applications
| Battery-Powered Portable Devices | Industrial Microcontroller Systems |
|---|---|
Use Scenario: Wearable health monitors powered by single-cell Li-ion batteries experiencing voltage sag during RF transmission. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-low RESET if voltage drops below 3.08V, holding it for ≥100ms to force clean µP reboot after recovery. Use Value: Prevents firmware lockup during brownout; 4µA supply current extends battery runtime by months versus discrete supervisor designs. | Use Scenario: Programmable logic controller (PLC) I/O module operating in harsh factory environments with noisy 24V DC rails. IC Role / Device Role / Timing Role: Provides fail-safe power-on reset and brownout protection for ARM-based controller; push/pull output drives reset pin without external components. Use Value: Eliminates need for RC network and Schmitt trigger; –40°C to +125°C rating ensures reliability in uncontrolled ambient conditions. |
| Automotive Body Control Modules | Smart Sensor Nodes |
Use Scenario: Door module MCU subjected to load-dump and cold-crank transients on 12V supply line. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output feeding MCU; asserts RESET during cold-crank (VCC dip to ~2.8V) and holds for 100ms post-recovery. Use Value: 3.08V threshold precisely targets 3.3V rail margin; transient immunity prevents spurious resets during alternator switching events. | Use Scenario: Wireless environmental sensor node powered by energy harvesting (e.g., solar + supercapacitor) with variable VCC. IC Role / Device Role / Timing Role: Detects insufficient charge level (<3.08V) and forces controlled shutdown/reset of sensor and radio subsystems. Use Value: 0.7V minimum operating voltage allows reset assertion even during capacitor discharge tail; 100ms timeout ensures complete state save before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | Same 3-pin SOT23, 3.08V threshold, but 240ms min timeout; higher 10µA ICC | Longer reset pulse may delay system startup in time-critical µP boot paths | Select MAX809TRD3+T only if extended reset hold time is required for complex FPGA configuration |
| TPS3808G33DBVR | 3.3V threshold (not 3.08V); 200ms min timeout; 1.1µA ICC; requires external capacitor for timeout adjustment | Fixed 3.3V threshold unsuitable for 3.0V–3.3V margin-sensitive designs; capacitor dependency adds BOM cost | Choose TPS3808G33DBVR only when lowest possible quiescent current is primary requirement and 3.3V threshold aligns with system rail |
Compared with MAX809TRD3+T and TPS3808G33DBVR, the MAX6801UR31D3+T offers optimal balance of precise 3.08V threshold, 100ms deterministic timeout, and ultra-low 4µA supply current - making it ideal for battery-powered and brownout-prone 3.3V embedded systems where timing predictability and power efficiency are critical.
Availability
MAX6801UR31D3+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial microcontroller systems, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6801UR31D3+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6800/MAX6801/MAX6802 family delivers highly integrated, low-power microprocessor supervisory circuits targeting space- and power-constrained embedded systems needing reliable, factory-calibrated reset functionality.
FAQ
What is the exact reset threshold voltage of MAX6801UR31D3+T and how tightly is it specified?
The MAX6801UR31D3+T has a factory-trimmed nominal reset threshold of 3.08V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This precision eliminates need for external resistor dividers and ensures consistent brownout detection across temperature and unit-to-unit variation in 3.3V systems.
Does MAX6801UR31D3+T require any external components to function as a reset supervisor?
No, the MAX6801UR31D3+T requires zero external components - its reset threshold, timeout period, and output drive are fully integrated and factory-configured. Unlike RC-based supervisors, it needs only VCC, GND, and connection to the µP RESET pin, reducing BOM count, PCB area, and qualification effort for the MAX6801UR31D3+T.
How does the 100ms reset timeout of MAX6801UR31D3+T compare to other standard options in the family?
The "D3" suffix in MAX6801UR31D3+T specifies a 100ms minimum reset timeout - distinct from D1 (1ms) and D2 (20ms) variants. This duration is optimized for modern microcontrollers with longer boot sequences, ensuring RESET remains asserted long enough for flash initialization, PLL lock, and peripheral configuration before release.
Can MAX6801UR31D3+T operate reliably during severe power supply brownout conditions?
Yes, the MAX6801UR31D3+T is guaranteed to maintain correct reset state down to VCC = 0.7V, and its push/pull output remains functional (VOL ≤ 0.3V at 1.2mA sink) even as supply collapses. This ensures deterministic µP reset assertion during deep brownout - a key reliability feature not offered by many competing supervisors.
Is MAX6801UR31D3+T pin-compatible with industry-standard alternatives like the MAX809 series?
Yes, the MAX6801UR31D3+T is explicitly pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 per the datasheet. All share identical 3-pin SOT23 pinout (GND, RESET, VCC), enabling drop-in replacement without PCB layout changes - confirmed for the MAX6801UR31D3+T.
MAX6801UR31D3+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:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6801UR31D3+T FAQ
1.How can I place an order for MAX6801UR31D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR31D3+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 MAX6801UR31D3+T reliable?
The price and inventory of MAX6801UR31D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR31D3+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR31D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR31D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR31D3+T?
MAX6801UR31D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR31D3+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 MAX6801UR31D3+T?
For technical support, including MAX6801UR31D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR31D3+T requirements.
6.How does Aetrix verify that MAX6801UR31D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR31D3+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 MAX6801UR31D3+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR31D3+T?
All MAX6801UR31D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR31D3+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 MAX6801UR31D3+T part is unused and in its original packaging.
Return procedure for MAX6801UR31D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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