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Analog Devices Inc./Maxim Integrated MAX6801UR46D1+T
- Part No.:
- MAX6801UR46D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR46D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
MAX6801UR46D1+T from Maxim Integrated is a 3-pin SOT23 push/pull active-low microprocessor supervisory circuit with factory-trimmed 4.63V reset threshold, 1ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It monitors 2.85V–5.0V power supplies in embedded controllers and portable equipment, asserting RESET during brownout and holding it for ≥1ms after VCC recovery.
For engineers reviewing the MAX6801UR46D1+T datasheet, MAX6801UR46D1+T pinout, MAX6801UR46D1+T application, or MAX6801UR46D1+T equivalent, key selection criteria include its precise 4.63V threshold tolerance (±1.8% at +25°C), ultra-low 4µA supply current at 3V, push/pull output drive capability (100nA sink), and immunity to fast VCC transients up to 30µs.
Technical Context
The MAX6801UR46D1+T implements a precision bandgap-based reset comparator with factory-trimmed 4.63V threshold and ±3% variation over –40°C to +125°C. Its internal timing circuit generates a fixed 1ms minimum reset pulse width after VCC rises above threshold, independent of external components.
It uses BiCMOS process technology to achieve guaranteed RESET validity down to VCC = 0.7V and transient immunity via comparator overdrive rejection. The push/pull output drives low actively (VOL ≤ 0.4V at 50µA) and high actively (VOH ≥ 0.8×VCC at 500µA), eliminating need for external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±1.8% at +25°C; ensures reliable detection of 4.63V supply brownout |
| Reset Timeout Period | 1ms minimum; guarantees µP reset hold time sufficient for full initialization |
| Supply Voltage Range | 0.7V to 5.5V; enables operation during deep brownout and full-system power-up |
| Supply Current | 4µA typical at VCC = 3.0V; minimizes battery drain in portable systems |
| Output Type | Active-low push/pull; drives RESET low without external pull-up, supports direct µP interface |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive under-hood environments |
| VCC Propagation Delay | 30µs max at 10V/ms VCC fall rate; rejects short supply glitches |
Pinout & Package
MAX6801UR46D1+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 - suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance |
| 2 (RESET) | Active-low push/pull output | Drives low during reset assertion (≤0.4V at 50µA); drives high when released (≥0.8×VCC) |
| 3 (VCC) | Supply voltage input | Power source and monitored rail; operates from 0.7V to 5.5V with full functionality |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed threshold | 4.63V with ±1.8% initial accuracy eliminates manual calibration and external resistors |
| Ultra-low quiescent current | 4µA at 3V enables >10-year battery life in always-on monitoring applications |
| Brownout immunity to 0.7V | Guaranteed RESET/RESET validity down to VCC = 0.7V prevents spurious release during deep undervoltage |
| Transient rejection | Rejects VCC glitches ≤30µs at 100mV overdrive, preventing false resets in noisy power rails |
| No external components required | Self-contained reset generation eliminates capacitors, resistors, and layout area for timing network |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules operating in harsh factory environments with fluctuating 5V rails. IC Role / Device Role / Timing Role: Monitors 5V system supply and asserts active-low RESET to ARM Cortex-M4 controller during brownout. Use Value: Ensures deterministic restart after voltage sag using 4.63V threshold aligned with 5V LDO dropout margin. |
Use Scenario: Handheld glucose meters powered by single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Supervises battery voltage and triggers MCU reset before critical undervoltage shutdown. Use Value: 1ms reset pulse guarantees full firmware reload; 4µA ICC extends battery runtime between calibrations. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12V-to-5V converted subsystems in door modules exposed to load-dump transients. IC Role / Device Role / Timing Role: Provides robust reset signaling to Infineon AURIX TC2xx during cold-crank (VCC dip to 3.5V). Use Value: 30µs glitch immunity prevents false reset during alternator switching noise; –40°C to +125°C rating ensures reliability. |
Use Scenario: DIN-rail mounted meters with isolated 3.3V logic rails powered from AC/DC converter. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse due to transformer saturation and holds MCU in reset until stable. Use Value: 4.63V threshold matches 3.3V LDO output tolerance stack-up; push/pull output interfaces directly with TI MSP430 reset pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD1+T | 4.63V threshold, 1ms timeout, but higher 15µA ICC and only rated to +85°C | Lacks extended temperature support for under-hood automotive use | Select when cost sensitivity outweighs industrial temp range and ultra-low current needs |
| TPS3801K46DBVR | 4.63V threshold, 1ms timeout, but open-drain output requiring external pull-up | Requires additional 47kΩ resistor and increases board area vs. push/pull | Select when system already uses open-drain reset buses or requires wired-OR capability |
Compared with MAX809TRD1+T and TPS3801K46DBVR, the MAX6801UR46D1+T delivers superior thermal robustness (–40°C to +125°C), lowest supply current (4µA vs. 15µA/10µA), and true push/pull drive eliminating external components - making it optimal for battery-powered and extended-temperature industrial designs.
Availability
MAX6801UR46D1+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply across long production lifecycles.
Supply support for MAX6801UR46D1+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 industrial, automotive, and communications markets.
The MAX6800/MAX6801/MAX6802 family delivers highly integrated, low-power µP supervisory circuits targeting space- and power-constrained embedded systems needing reliable power-on and brownout reset.
FAQ
What is the exact reset threshold voltage of MAX6801UR46D1+T and how tightly is it specified?
The MAX6801UR46D1+T has a factory-trimmed nominal reset threshold of 4.63V, 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. The value is confirmed in Table 1 of the official datasheet and applies specifically to the "46" suffix variant.
Does MAX6801UR46D1+T require an external pull-up resistor on its RESET pin?
No, MAX6801UR46D1+T does not require an external pull-up resistor because it features a push/pull output stage. Its RESET pin actively drives high (VOH ≥ 0.8×VCC) when deasserted and low (VOL ≤ 0.4V) when asserted, enabling direct connection to microcontroller reset inputs without passive components. This is explicitly stated in the Pin Description and Applications Information sections of the datasheet.
What is the minimum reset timeout period for MAX6801UR46D1+T and is it guaranteed over temperature?
The MAX6801UR46D1+T provides a minimum reset timeout period of 1ms, as indicated by the "D1" suffix in its part number. This value is guaranteed over the full –40°C to +125°C temperature range, with typical values ranging from 1.0ms to 1.5ms at +25°C and no upper limit specified - ensuring sufficient hold time for all common microprocessors to complete power-on initialization.
Can MAX6801UR46D1+T operate reliably when VCC drops below 1.0V?
Yes, MAX6801UR46D1+T is guaranteed to maintain correct RESET state down to VCC = 0.7V, per Absolute Maximum Ratings and Electrical Characteristics tables. Unlike the MAX6802 (guaranteed only to 1.0V), the MAX6801's push/pull architecture sustains valid output levels even during deep brownout, making it suitable for applications where supply collapse below 1V must trigger and hold reset.
Is MAX6801UR46D1+T pin-compatible with other supervisory ICs such as MAX809 or MAX6326?
Yes, MAX6801UR46D1+T is pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 families in the 3-pin SOT23 package, sharing identical pinout (GND, RESET, VCC). This allows drop-in replacement in existing layouts where the same 4.63V threshold and 1ms timeout meet system requirements - confirmed in the Benefits and Features section of the datasheet.
MAX6801UR46D1+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:
- 4.63V
- 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
MAX6801UR46D1+T FAQ
1.How can I place an order for MAX6801UR46D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR46D1+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 MAX6801UR46D1+T reliable?
The price and inventory of MAX6801UR46D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR46D1+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR46D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR46D1+T transactions.
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4.How is shipping managed for MAX6801UR46D1+T?
MAX6801UR46D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR46D1+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 MAX6801UR46D1+T?
For technical support, including MAX6801UR46D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR46D1+T requirements.
6.How does Aetrix verify that MAX6801UR46D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR46D1+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 MAX6801UR46D1+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR46D1+T?
All MAX6801UR46D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR46D1+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 MAX6801UR46D1+T part is unused and in its original packaging.
Return procedure for MAX6801UR46D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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