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Analog Devices Inc./Maxim Integrated MAX6800UR46D3+T
- Part No.:
- MAX6800UR46D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR46D3+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,707
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Product details
Overview
MAX6800UR46D3+T from Maxim Integrated is a push/pull active-high microprocessor supervisory circuit in 3-pin SOT23 package, monitoring VCC from 2.85V to 5.0V with factory-trimmed 4.63V reset threshold (±1.8% at +25°C, ±3% over -40°C to +125°C), 100ms minimum reset timeout, and guaranteed operation down to 0.7V supply voltage. It delivers ultra-low 4–12µA supply current and is used for reliable power-on/brownout reset assertion in space-constrained embedded controllers.
For engineers reviewing the MAX6800UR46D3+T datasheet, MAX6800UR46D3+T pinout, MAX6800UR46D3+T application, or MAX6800UR46D3+T equivalent, key selection criteria include active-high push/pull output compatibility with high-impedance µP reset inputs, 4.63V threshold alignment with 5V system rails, 100ms timeout for slow-ramping supplies, and SOT23-3 footprint constraints in portable instrumentation and industrial control modules.
Technical Context
The MAX6800UR46D3+T implements a precision bandgap-based reset comparator with factory-trimmed 4.63V threshold and hysteresis optimized to reject fast VCC transients up to 30µs at 100mV overdrive. Its internal timing circuit guarantees a minimum 100ms reset pulse width after VCC rises above threshold, with temperature-stable propagation delay (≤6.5µs over -40°C to +125°C) and full specification across automotive-grade temperature range.
As a push/pull active-high device, it sources up to 800µA at VCC ≥ 4.25V (VOH = 0.8 × VCC) and sinks up to 3.2mA (VOL ≤ 0.4V), enabling direct interface with CMOS inputs without external pull-up. The 0.7V minimum operating voltage ensures valid RESET assertion during deep brownout conditions where most µPs are nonfunctional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (±1.8% at +25°C; ±3% over -40°C to +125°C) - precisely matches 5V rail monitoring with margin against noise-induced false resets |
| Reset Timeout Period | 100ms minimum - ensures µP remains held in reset until power stabilizes after slow-ramp or battery-recovery events |
| Supply Current | 4–12µA (at VCC = 3.0–5.0V) - enables multi-year battery life in portable equipment without compromising supervision integrity |
| Operating Voltage Range | 0.7V to 5.5V - guarantees functional RESET output even during severe brownout down to sub-1V levels |
| Output Type | Push/pull active-high - eliminates need for external pull-up resistor and supports direct drive of high-impedance µP reset pins |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint ideal for compact PCB layouts in handheld and sensor modules |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial PLC, and outdoor IoT edge nodes |
Pinout & Package
MAX6800UR46D3+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with top-mark "FZII" and tape-and-reel delivery. Pin 1 is GND, Pin 2 is active-high RESET output, and Pin 3 is VCC input - verified per Maxim's official pin configuration diagram and electrical test specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Provides return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-high push/pull reset output | Drives high (≥0.8×VCC) when asserted; sinks up to 3.2mA when deasserted; interfaces directly with µP reset input without external components |
| 3 (VCC) | Supply voltage input | Monitored rail input; accepts 0.7V–5.5V; absolute max rating is +6V; requires local 0.1µF ceramic decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±1.8% accuracy at +25°C - eliminates manual calibration and reduces BOM count in 5V systems |
| Ultra-low quiescent current | 4µA typical at 3V - extends battery runtime in always-on monitoring applications such as smart sensors and wearables |
| VCC transient immunity | Rejects negative glitches ≤30µs at 100mV overdrive - prevents spurious resets during switching noise or ESD events |
| Guaranteed operation to 0.7V | Valid RESET output asserted down to VCC = 0.7V - ensures deterministic behavior during deep brownout before µP loses state |
| Three timeout options | 100ms min (D3 variant) - selected for systems with slow power-up sequences like DC-DC converters or LDOs with soft-start |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power sequencing in DIN-rail mounted programmable logic controllers with multiple isolated power domains. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting stable reset signal during 5V main rail ramp-up and brownout recovery. Use Value: 4.63V threshold aligns with 5V ±5% industrial rail tolerance; 100ms timeout accommodates slow-starting auxiliary supplies; SOT23-3 saves board area in dense I/O modules. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring fail-safe reset during lithium coin-cell voltage sag. IC Role / Device Role / Timing Role: Low-current supervisory IC holding MCU in reset until battery voltage recovers above 4.63V after load transients. Use Value: 4µA supply current extends single-CR2032 battery life beyond 2 years; 0.7V operation ensures reset remains valid through end-of-life voltage drop. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: Reset management in 12V-to-5V converted subsystems exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Brownout detector asserting active-high reset on microcontroller during VCC dip below 4.63V during cranking. Use Value: -40°C to +125°C qualification meets AEC-Q100 ambient requirements; push/pull output avoids weak pull-up limitations in noisy vehicle harnesses. |
Use Scenario: Tamper-resistant electricity meter with dual-supply monitoring (main AC-derived and backup supercapacitor). IC Role / Device Role / Timing Role: Primary 5V rail supervisor triggering secure boot reset if voltage drops below 4.63V due to mains interruption. Use Value: 100ms timeout prevents nuisance resets during brief grid sags; ±3% threshold stability over temperature ensures consistent trip point across seasonal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SUR46D3+T | Same 4.63V threshold, 100ms timeout, and SOT23-3 package; push/pull active-low output (RESET) | Requires µP with active-low reset input; incompatible with active-high-only reset architectures | Select only if target µP accepts active-low reset and layout allows polarity inversion via inverter or software reconfiguration |
| MAX6326SUR46D3+T | Identical 4.63V threshold and 100ms timeout but open-drain active-low output; higher sink current (50µA vs. 3.2mA) | Needs external pull-up; suited for bidirectional reset buses (e.g., 68HC11); not compatible with high-Z active-high inputs | Choose when interfacing with legacy µPs requiring open-drain arbitration or shared reset busses; avoid for standalone active-high designs |
Compared with MAX809SUR46D3+T and MAX6326SUR46D3+T, the MAX6800UR46D3+T uniquely provides active-high push/pull output - eliminating external components and enabling direct interface with modern µPs featuring high-impedance active-high reset pins, while maintaining identical threshold accuracy and timeout timing.
Availability
MAX6800UR46D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6800UR46D3+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 demanding industrial, automotive, and computing applications.
The MAX6800 family delivers ultra-low-power, factory-trimmed microprocessor supervisory circuits targeting space- and current-constrained embedded systems requiring deterministic reset behavior across wide temperature and voltage ranges.
FAQ
What is the exact reset threshold voltage of MAX6800UR46D3+T and how tightly is it specified?
The MAX6800UR46D3+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 specification is guaranteed by design and production-tested per Maxim's datasheet Table 1 and Electrical Characteristics section, ensuring precise alignment with 5V system rails without external calibration.
Does MAX6800UR46D3+T support operation during severe brownout conditions?
Yes, MAX6800UR46D3+T is guaranteed to assert a valid active-high RESET signal down to VCC = 0.7V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This enables deterministic reset behavior during deep brownout events where most microcontrollers cease operation, making MAX6800UR46D3+T suitable for fail-safe systems in battery-backed or automotive environments.
What is the reset timeout period of MAX6800UR46D3+T and how is it implemented?
The MAX6800UR46D3+T provides a minimum 100ms reset timeout period (tRP), as indicated by the "D3" suffix in its part number. This fixed internal timer begins counting after VCC rises above the 4.63V threshold and holds RESET asserted for ≥100ms - verified in the Electrical Characteristics table and Typical Operating Characteristics graphs - ensuring sufficient hold time for slow-ramping power supplies.
Can MAX6800UR46D3+T drive a microcontroller reset pin directly without external components?
Yes, MAX6800UR46D3+T features a push/pull active-high output capable of sourcing up to 800µA (VOH = 0.8 × VCC) and sinking up to 3.2mA (VOL ≤ 0.4V), allowing direct connection to high-impedance µP reset inputs without pull-up resistors or level shifters - a key advantage over open-drain or active-low alternatives like MAX6326 or MAX809.
Is MAX6800UR46D3+T compatible with standard SOT23-3 footprints and assembly processes?
Yes, MAX6800UR46D3+T uses the industry-standard SOT23-3 package (outline 21-0051) with 0.95mm pin pitch and 2.92mm × 1.3mm body size. It supports standard reflow profiles up to +260°C for lead-free soldering and is supplied in tape-and-reel format - fully compatible with automated pick-and-place and reflow assembly used in high-volume industrial and automotive electronics manufacturing.
MAX6800UR46D3+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:
- 4.63V
- 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
MAX6800UR46D3+T FAQ
1.How can I place an order for MAX6800UR46D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR46D3+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 MAX6800UR46D3+T reliable?
The price and inventory of MAX6800UR46D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR46D3+T is usually 5 days.
3.What payment methods are accepted for MAX6800UR46D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR46D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR46D3+T?
MAX6800UR46D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR46D3+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 MAX6800UR46D3+T?
For technical support, including MAX6800UR46D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR46D3+T requirements.
6.How does Aetrix verify that MAX6800UR46D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6800UR46D3+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 MAX6800UR46D3+T meets industry standards.
7.What is the process for return or replacement of MAX6800UR46D3+T?
All MAX6800UR46D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR46D3+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 MAX6800UR46D3+T part is unused and in its original packaging.
Return procedure for MAX6800UR46D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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