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Analog Devices Inc./Maxim Integrated MAX6800UR46D1-T
- Part No.:
- MAX6800UR46D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR46D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6800UR46D1-T from Maxim Integrated is a precision push/pull active-high microprocessor supervisory circuit in SOT23-3 package, monitoring 4.63V ±3% supply voltage with 1ms minimum reset timeout, ultra-low 4µA supply current, and guaranteed operation down to VCC = 0.7V. It ensures reliable power-on/brownout reset for embedded controllers in portable and industrial systems.
For engineers reviewing the MAX6800UR46D1-T datasheet, MAX6800UR46D1-T pinout, MAX6800UR46D1-T application, or MAX6800UR46D1-T equivalent, this page delivers verified electrical behavior, thermal stability across -40°C to +125°C, reset threshold accuracy, transient immunity data, and real-world interface guidance for μP reset pin integration.
Technical Context
The MAX6800UR46D1-T implements a factory-trimmed bandgap-based reset comparator with 4.63V nominal threshold (±1.8% at +25°C, ±3% over full temperature range), asserting an active-high RESET signal during VCC undervoltage and holding it for ≥1ms after VCC recovers. Its BiCMOS process enables stable operation at 0.7V VCC while maintaining valid output drive.
Designed for minimal external dependency, it requires no capacitors or resistors-only VCC, GND, and RESET connection-and rejects fast transients up to 30µs at 100mV overdrive. The push/pull output sources ≥800µA at VCC ≥4.25V and sinks 1.2mA with VOL ≤0.4V, enabling direct interface with CMOS inputs without pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% over -40°C to +125°C - ensures precise brownout detection for 5V systems with margin against ripple-induced false triggers |
| Reset Timeout Period | 1ms minimum - provides sufficient hold time for microcontroller initialization without delaying system boot unnecessarily |
| Supply Current | 4µA typical at 3V - enables multi-year battery life in always-on portable equipment |
| Operating Voltage Range | 0.7V to 5.5V - guarantees functional reset assertion even during deep brownout or partial power loss |
| Output Type | Push/pull active-high - eliminates need for external pull-up resistor and supports direct CMOS logic interface |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications |
| VCC Propagation Delay | 30µs max at 10V/ms VCC fall rate - ensures rapid response to supply collapse without missing critical fault windows |
Pinout & Package
MAX6800UR46D1-T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height, optimized 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 to ensure accurate threshold sensing |
| 2 (RESET) | Active-high push/pull reset output | Drives high when VCC ≥4.63V–3%; sinks 1.2mA at VOL ≤0.4V and sources 800µA at VOH ≥0.8×VCC - directly compatible with standard CMOS inputs |
| 3 (VCC) | Supply voltage input | Monitored rail input; accepts 0.7V–5.5V; internal regulation enables operation below 1V where most μPs are nonfunctional |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±1.8% tolerance at +25°C - eliminates manual calibration and reduces BOM count vs. discrete solutions |
| Ultra-low quiescent current | 4µA at 3V - extends battery runtime in IoT sensors and wearables without compromising supervision integrity |
| Transient-immune reset comparator | Rejects <30µs negative glitches at 100mV overdrive - prevents spurious resets during switching noise or ESD events |
| Valid reset down to 0.7V VCC | Guaranteed RESET/RESET logic state integrity at VCC = 0.7V - ensures deterministic behavior during worst-case brownout |
| Three timeout options | 1ms/20ms/100ms factory-programmed - allows matching reset duration to specific μP startup requirements |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power cycling and brownout events in DIN-rail mounted programmable logic controllers operating in factory environments with fluctuating 24VDC supplies converted to 5V. IC Role / Device Role / Timing Role: Primary power-fail supervisor generating active-high reset pulse to hold CPU in reset until regulated 5V rail stabilizes post-brownout. Use Value: Prevents firmware corruption by ensuring μP remains held in reset for ≥1ms after VCC exceeds 4.63V, even during 10V/ms supply collapse. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring continuous operation on coin cells with tight voltage margins. IC Role / Device Role / Timing Role: Low-power supply monitor asserting active-high RESET to halt processor during battery sag below 4.63V, then releasing after 1ms recovery window. Use Value: 4µA supply current extends usable battery life by >2 years versus higher-current supervisors, while 0.7V operation detects near-dead-cell conditions. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: 12V automotive subsystems subjected to load-dump and cold-crank transients where 5V LDO output may dip below 4.5V. IC Role / Device Role / Timing Role: Brownout detector interfacing directly with MCU's active-high reset input, eliminating external level-shifting components. Use Value: Push/pull output drives MCU reset pin without pull-up resistor, reducing component count and board area in space-constrained BCM designs. |
Use Scenario: Revenue-grade electricity meters deployed in outdoor enclosures experiencing wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Precision supply monitor ensuring meter SoC initializes only after stable 3.3V/5V rails are confirmed, preventing flash write errors during power-up. Use Value: ±3% reset threshold tolerance over full temperature range avoids false resets due to thermal drift, improving field reliability. |
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 | 4.63V threshold, 1ms timeout, push/pull active-low output; 1.2µA ICC; operates down to 1.0V | Requires inverted reset logic handling in MCU firmware or external inverter; lower current draw but less robust brownout detection at sub-1V | Select when active-low reset is required and ultra-low current dominates design priority over sub-1V operation |
| MAX6326UT46D1-T | 4.63V threshold, 1ms timeout, push/pull active-high output; 2.5µA ICC; operates down to 0.9V; includes watchdog timer | Provides additional watchdog functionality for software hang detection; slightly reduced minimum VCC margin vs. MAX6800UR46D1-T | Select when system-level reliability requires both power supervision and software watchdog capability in same package |
Compared with MAX809TRD1-T and MAX6326UT46D1-T, the MAX6800UR46D1-T offers superior sub-1V operation (0.7V vs. 1.0V/0.9V) and higher noise immunity, making it optimal for brownout-prone battery and automotive applications where reset validity at lowest possible VCC is critical.
Availability
MAX6800UR46D1-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.
Supply support for MAX6800UR46D1-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, serving industrial, automotive, and communications markets.
The MAX6800 family delivers ultra-low-power, factory-trimmed μP supervisory circuits targeting space- and energy-constrained embedded systems needing deterministic reset behavior across extreme temperatures and supply conditions.
FAQ
What is the exact reset threshold voltage of MAX6800UR46D1-T and how does it vary with temperature?
The MAX6800UR46D1-T has a nominal reset threshold of 4.63V, factory-trimmed to ±1.8% at +25°C and ±3% over the full -40°C to +125°C operating range. This means the actual threshold falls between 4.491V and 4.769V across temperature, ensuring consistent brownout detection in 5V systems despite thermal drift. The MAX6800UR46D1-T uses a bandgap-based comparator for stable performance without external calibration.
Does MAX6800UR46D1-T require any external components to function?
No, the MAX6800UR46D1-T operates autonomously with only three connections: VCC, GND, and RESET. It contains an integrated precision voltage reference, comparator, and push/pull output driver-no external capacitors, resistors, or trimming components are needed. This simplifies layout, reduces BOM cost, and improves reliability compared to discrete reset solutions.
What is the minimum supply voltage at which MAX6800UR46D1-T guarantees correct reset output behavior?
The MAX6800UR46D1-T guarantees valid RESET output logic states down to VCC = 0.7V, as specified in its Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset assertion during deep brownout conditions where many competing supervisors cease functioning, making the MAX6800UR46D1-T especially suitable for battery-powered and automotive applications.
How does the 1ms reset timeout period of MAX6800UR46D1-T compare to longer-duration variants like D2-T and D3-T?
The MAX6800UR46D1-T provides a minimum 1ms reset timeout, optimized for fast-boot microcontrollers that require brief but reliable reset hold times. In contrast, D2-T (20ms min) and D3-T (100ms min) variants accommodate slower-starting processors or systems with complex power sequencing. All versions share identical threshold accuracy, current consumption, and temperature range-only the timeout differs.
Can MAX6800UR46D1-T interface directly with a microcontroller that has an active-low reset input?
No-the MAX6800UR46D1-T features an active-high push/pull RESET output and cannot directly drive an active-low reset pin without inversion. To interface with such MCUs, use an external inverter (e.g., 74LVC1G04) or select the pin-compatible MAX6801UR46D1-T (active-low push/pull) or MAX6802UR46D1-T (active-low open-drain). The MAX6800UR46D1-T is designed specifically for active-high reset architectures.
MAX6800UR46D1-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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6800UR46D1-T FAQ
1.How can I place an order for MAX6800UR46D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR46D1-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 MAX6800UR46D1-T reliable?
The price and inventory of MAX6800UR46D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR46D1-T is usually 5 days.
3.What payment methods are accepted for MAX6800UR46D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR46D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR46D1-T?
MAX6800UR46D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR46D1-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 MAX6800UR46D1-T?
For technical support, including MAX6800UR46D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR46D1-T requirements.
6.How does Aetrix verify that MAX6800UR46D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6800UR46D1-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 MAX6800UR46D1-T meets industry standards.
7.What is the process for return or replacement of MAX6800UR46D1-T?
All MAX6800UR46D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR46D1-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 MAX6800UR46D1-T part is unused and in its original packaging.
Return procedure for MAX6800UR46D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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