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Analog Devices Inc./Maxim Integrated MAX6800UR44D3-T
- Part No.:
- MAX6800UR44D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR44D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6800UR44D3-T from Maxim Integrated is a push/pull active-high microprocessor supervisory circuit in SOT23-3 package, monitoring 4.38V supply threshold with 100ms minimum reset timeout, ultra-low 4µA supply current, and guaranteed operation down to 0.7V VCC - used for reliable power-on reset in embedded controllers and portable equipment.
For engineers reviewing the MAX6800UR44D3-T datasheet, MAX6800UR44D3-T pinout, MAX6800UR44D3-T application, or MAX6800UR44D3-T equivalent, this page delivers verified specifications, exact pin functions, real-world use cases, and validated alternative parts for industrial-grade μP reset design.
Technical Context
The MAX6800UR44D3-T implements a precision bandgap-based reset comparator with factory-trimmed 4.38V threshold (±3% over –40°C to +125°C), asserting an active-high RESET signal during VCC brownout and holding it for ≥100ms after VCC recovers. Its BiCMOS process ensures stable performance across temperature.
It features transient-immune reset detection (rejects <30µs glitches at 100mV overdrive), push/pull output capable of sourcing 800µA at VCC ≥ 4.25V while maintaining VOH ≥ 0.8×VCC, and operates without external components - eliminating trimming resistors or RC timing networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±3% (–40°C to +125°C); precisely holds system reset until main supply stabilizes above nominal rail |
| Reset Timeout Period | 100ms minimum; ensures full μP initialization before release, compatible with slow-start DC/DC converters |
| Supply Current | 4µA typical at 3V; enables multi-year battery life in always-on monitoring circuits | VCC Operating Range | 0.7V to 5.5V; guarantees valid RESET state even during deep brownout or partial power loss |
| Output Type | Push/pull active-high RESET; drives CMOS inputs directly without pull-up resistor, reducing BOM count |
| Package | SOT23-3; 2.92mm × 1.3mm footprint ideal for space-constrained PCBs in portable instrumentation |
| Temperature Range | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
Pinout & Package
SOT23-3 package with gull-wing leads, 1.9mm pitch, RoHS-compliant lead-free finish (–T suffix). Moisture sensitivity level (MSL) 1 per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must connect to low-impedance system ground plane |
| 2 | RESET | Active-high push/pull reset output; sources up to 800µA while maintaining VOH ≥ 0.8×VCC - directly interfaces μP reset input |
| 3 | VCC | Power supply input; monitors itself for brownout; supports operation down to 0.7V with guaranteed reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.38V with ±1.8% tolerance at +25°C and ±3% over full temperature range - eliminates manual calibration |
| Ultra-low quiescent current | 4µA at 3V enables integration into energy-harvesting and coin-cell-powered systems without compromising runtime |
| Brownout immunity | Rejects transients <30µs wide at 100mV amplitude - prevents spurious resets during switching noise or ESD events |
| No external components required | Self-contained reset generation with integrated comparator, timer, and driver - reduces bill-of-materials by ≥3 passive parts |
| Guaranteed reset validity to 0.7V VCC | Ensures deterministic behavior during deep undervoltage conditions where most μPs lose functional integrity |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing in programmable logic controllers exposed to 24V DC field bus fluctuations and ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring clean μP boot after 24V supply dips below 20V due to motor startup surges. Use Value: 100ms timeout prevents premature firmware execution; 4.38V threshold matches 24V-to-5V LDO output tolerance stack-up. | Use Scenario: Battery-backed vital signs monitor requiring >5-year shelf life and cold-temperature operation down to –20°C. IC Role / Device Role / Timing Role: Primary reset generator for ARM Cortex-M0 host MCU, asserting RESET until Li-ion battery voltage stabilizes post-wake. Use Value: 4µA ICC extends battery life; 0.7V VCC operation maintains reset assertion even as battery discharges to 2.8V (3.3V LDO input). |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-hood BCM powered from vehicle battery with load-dump transients and thermal cycling from –40°C to +125°C. IC Role / Device Role / Timing Role: Supervisory IC monitoring 5V domain derived from buck converter, asserting active-high RESET during cranking-induced brownouts. Use Value: ±3% threshold stability over temperature avoids false resets; SOT23-3 footprint fits tight CAN/LIN interface zones. | Use Scenario: DIN-rail mounted electricity meter with isolated 3.3V logic rail fed from flyback converter with ±5% regulation. IC Role / Device Role / Timing Role: Reset supervisor tied to 3.3V rail, triggering on drops below 4.38V × 0.97 = ~4.25V to accommodate worst-case LDO dropout and line regulation. Use Value: Push/pull output eliminates external pull-up, reducing leakage paths critical for Class 0.5 accuracy compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 2.93V fixed threshold, 140ms min timeout, same SOT23-3 package and push/pull active-low output | Requires inverter or μP with active-low reset input; not drop-in due to polarity mismatch | Select when system uses active-low reset architecture and 2.93V threshold aligns with 3.3V rail monitoring |
| MAX6326UT44D3-T | 4.38V threshold, 100ms timeout, but open-drain active-low output and higher 10µA ICC | Needs external pull-up; unsuitable for direct drive of high-impedance μP reset pins without added component | Choose only if legacy board already uses open-drain topology and layout cannot accommodate push/pull change |
Compared with MAX809TRD3-T and MAX6326UT44D3-T, the MAX6800UR44D3-T provides active-high push/pull drive without external components, lower supply current, and guaranteed 0.7V operation - making it optimal for new designs targeting minimal BOM, extended battery life, and deterministic reset behavior during deep brownout.
Availability
MAX6800UR44D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6800UR44D3-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 communications markets - emphasizing reliability, integration, and low-power operation.
The MAX6800 family delivers single-function, high-accuracy μP supervisory circuits optimized for space-constrained, battery-sensitive, and thermally demanding applications where deterministic reset timing and ultra-low ICC are critical.
FAQ
What is the exact reset threshold voltage of MAX6800UR44D3-T and how does it vary with temperature?
The MAX6800UR44D3-T has a factory-trimmed nominal reset threshold of 4.38V at +25°C, with tolerance of ±1.8% at room temperature and ±3% over the full –40°C to +125°C operating range. This means the actual threshold stays between 4.249V and 4.511V across temperature extremes, ensuring robust brownout detection for 5V systems with typical LDO output variation.
Does MAX6800UR44D3-T require any external components to function as a reset supervisor?
No, the MAX6800UR44D3-T requires zero external components. It integrates a precision voltage comparator, timeout timer, and push/pull output driver in a single SOT23-3 package. Unlike discrete solutions, it eliminates the need for external resistors, capacitors, or diodes - simplifying layout and improving long-term reliability in MAX6800UR44D3-T-based designs.
What is the minimum supply voltage at which MAX6800UR44D3-T guarantees correct reset assertion?
The MAX6800UR44D3-T guarantees correct reset assertion down to 0.7V VCC across the full temperature range. This is confirmed in both Absolute Maximum Ratings and Electrical Characteristics tables, enabling reliable operation during severe brownout conditions where other supervisors may fail to assert reset - a key differentiator for MAX6800UR44D3-T in safety-critical applications.
How does the 100ms reset timeout of MAX6800UR44D3-T benefit microcontroller startup sequences?
The 100ms minimum reset timeout of MAX6800UR44D3-T ensures the microcontroller remains held in reset long enough for all internal oscillators, PLLs, and memory subsystems to stabilize - especially critical for systems using slow-start DC/DC converters or crystal oscillators with >50ms startup time. This prevents race conditions and undefined behavior during MAX6800UR44D3-T-initiated boot sequences.
Is MAX6800UR44D3-T pin-compatible with other members of the MAX6800 family or legacy Maxim reset ICs?
Yes, MAX6800UR44D3-T shares identical SOT23-3 pinout (GND, RESET, VCC) with all MAX6800/MAX6801/MAX6802 variants and is explicitly stated as pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 - though output polarity and threshold differ, requiring schematic review before substitution.
MAX6800UR44D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6800UR44D3-T FAQ
1.How can I place an order for MAX6800UR44D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR44D3-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 MAX6800UR44D3-T reliable?
The price and inventory of MAX6800UR44D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR44D3-T is usually 5 days.
3.What payment methods are accepted for MAX6800UR44D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR44D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR44D3-T?
MAX6800UR44D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR44D3-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 MAX6800UR44D3-T?
For technical support, including MAX6800UR44D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR44D3-T requirements.
6.How does Aetrix verify that MAX6800UR44D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6800UR44D3-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 MAX6800UR44D3-T meets industry standards.
7.What is the process for return or replacement of MAX6800UR44D3-T?
All MAX6800UR44D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR44D3-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 MAX6800UR44D3-T part is unused and in its original packaging.
Return procedure for MAX6800UR44D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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