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Analog Devices Inc./Maxim Integrated MAX6802UR26D3-T
- Part No.:
- MAX6802UR26D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6802UR26D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,796
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Product details
Overview
MAX6802UR26D3-T from Maxim Integrated is a 3-pin SOT23 open-drain microprocessor supervisory circuit with 2.63V reset threshold, 100ms minimum reset timeout, and guaranteed operation down to VCC = 1.0V. It monitors power supplies in 2.85V–5.0V digital systems, asserts active-low RESET during brownout, and provides transient-immune reset generation for critical μP/μC power monitoring in portable equipment.
For engineers reviewing the MAX6802UR26D3-T datasheet, MAX6802UR26D3-T pinout, MAX6802UR26D3-T application, or MAX6802UR26D3-T equivalent, key selection factors include its open-drain output structure, factory-trimmed 2.63V threshold (±3% over temperature), 100ms reset pulse width, ultra-low 4µA supply current, and compatibility with bidirectional μP reset pins such as Motorola 68HC11.
Technical Context
The MAX6802UR26D3-T implements a precision bandgap-based reset comparator with factory-trimmed 2.63V threshold and ±3% tolerance over –40°C to +125°C. Its open-drain RESET output requires an external pullup resistor and supports bidirectional reset arbitration with microcontrollers like the 68HC11.
It features immunity to fast VCC transients (e.g., ≤30µs at 100mV overdrive), guarantees valid RESET assertion down to VCC = 1.0V, and delivers a minimum 100ms reset timeout after VCC rises above threshold-fully specified across automotive-grade temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±3% over –40°C to +125°C - ensures reliable brownout detection for 2.85V systems |
| Reset Timeout Period | 100ms (min) - holds RESET active long enough to ensure full μP initialization |
| Supply Current | 4µA at VCC = 3.0V - enables battery longevity in portable equipment |
| Operating VCC Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout |
| Output Type | Open-drain active-low - allows wired-OR reset bus and bidirectional μP interface |
| VOL (RESET asserted) | 0.4V at ISINK = 50µA, VCC ≥ 1.0V - ensures solid logic-low under light load |
| Reset Propagation Delay | 30µs max at 10V/ms VCC fall rate - rejects sub-30µs supply glitches |
Pinout & Package
MAX6802UR26D3-T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with top mark FZIQ. The compact footprint supports space-constrained PCB layouts in portable and embedded applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Open-drain active-low reset output - requires external pullup; sinks up to 50µA at 0.4V |
| 3 | VCC | Power supply input - operates from 1.0V to 5.5V; powers internal circuitry and enables reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain RESET output | Enables direct interface with bidirectional μP reset pins (e.g., Motorola 68HC11) via single pullup resistor |
| Factory-trimmed 2.63V threshold | Eliminates external resistor divider; achieves ±3% accuracy over full temperature range without calibration |
| 100ms minimum reset timeout | Guarantees sufficient hold time for full microcontroller boot sequence, including oscillator stabilization |
| 1.0V minimum operating voltage | Ensures deterministic reset behavior during deep brownout conditions where VCC drops below 1.2V |
| 4µA typical supply current | Reduces quiescent power draw in always-on monitoring circuits, extending battery life in portable devices |
Applications
| Computers | Controllers |
|---|---|
Use Scenario: Monitoring 3.3V core supply in embedded PC/104 modules during cold start and thermal cycling. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until VCC stabilizes above 2.63V for ≥100ms. Use Value: Prevents erratic execution by ensuring CPU remains held in reset until power rail settles within specification. | Use Scenario: Power supervision in industrial PLC I/O modules powered from isolated 5V DC-DC converters. IC Role / Device Role / Timing Role: Brownout detector with open-drain output enabling shared reset bus across multiple controller domains. Use Value: Allows coordinated system-wide reset using single pullup, reducing component count and board area. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Supply monitoring in handheld multimeters with dual 3V coin-cell batteries. IC Role / Device Role / Timing Role: Low-voltage supervisor asserting RESET when stacked battery voltage falls below 2.63V. Use Value: Eliminates false resets caused by transient load spikes while guaranteeing shutdown before EEPROM corruption. | Use Scenario: Reset management in Bluetooth LE sensor nodes operating from single 3V CR2032 cell. IC Role / Device Role / Timing Role: Ultra-low-current (4µA) supervisor maintaining valid reset state down to 1.0V VCC. Use Value: Extends usable battery life by minimizing quiescent draw and enabling graceful shutdown prior to cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT26D3-T | Push/pull active-low RESET; same 2.63V threshold and 100ms timeout; operates down to 0.7V | Not suitable for wired-OR or bidirectional reset buses due to push/pull output | Select when driving high-capacitance loads or requiring no external pullup |
| TPS3808G26DBVR | Open-drain active-low RESET; 2.63V threshold; 100ms timeout; 1.8V–6.0V VCC range; higher 8µA ICC | Wider VCC range but higher supply current; not qualified to –40°C to +125°C automotive grade | Select when wider input voltage range is required and extended temperature is not mandatory |
Compared with MAX6802UR26D3-T, MAX6327UT26D3-T offers lower minimum VCC (0.7V) but lacks open-drain flexibility, while TPS3808G26DBVR extends VCC range to 6.0V but increases quiescent current and relaxes temperature grading-making MAX6802UR26D3-T optimal for space-constrained, low-power, automotive-grade brownout monitoring.
Availability
MAX6802UR26D3-T is available at Aetrix Electronics and suitable for computers, controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6802UR26D3-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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, interface, and timing applications.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, factory-trimmed supervisory circuits for reliable microprocessor reset generation in space- and power-constrained embedded systems.
FAQ
What is the reset threshold voltage of the MAX6802UR26D3-T?
The MAX6802UR26D3-T has a factory-trimmed reset threshold of 2.63V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating temperature range. This precise threshold ensures consistent brownout detection for 2.85V systems without external calibration components.
Does the MAX6802UR26D3-T support bidirectional reset interfaces?
Yes, the MAX6802UR26D3-T supports bidirectional reset interfaces via its open-drain active-low RESET output. When used with a single external pullup resistor, it enables shared reset arbitration with microcontrollers like the Motorola 68HC11, allowing either device to assert system reset.
What is the minimum supply voltage at which the MAX6802UR26D3-T guarantees valid reset operation?
The MAX6802UR26D3-T guarantees valid RESET assertion down to VCC = 1.0V, as confirmed in its Absolute Maximum Ratings and Electrical Characteristics tables. This exceeds the 0.7V limit of the MAX6800/MAX6801 variants and ensures deterministic behavior during deep brownout events.
How long does the MAX6802UR26D3-T hold the RESET signal active after VCC rises above threshold?
The MAX6802UR26D3-T holds the RESET signal active for a minimum of 100ms after VCC rises above the 2.63V threshold. This timeout is factory-programmed and fully specified over –40°C to +125°C, ensuring sufficient hold time for complete microprocessor initialization.
What package type and marking code does the MAX6802UR26D3-T use?
The MAX6802UR26D3-T uses a 3-pin SOT23 package (outline 21-0051) with top-side laser marking "FZIQ". It is supplied in tape-and-reel format and available in both leaded and lead-free versions (suffix "-T" denotes leaded; "+T" denotes lead-free).
MAX6802UR26D3-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:
- 2.63V
- Output:
- Open Drain or Open Collector
- 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
MAX6802UR26D3-T FAQ
1.How can I place an order for MAX6802UR26D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6802UR26D3-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 MAX6802UR26D3-T reliable?
The price and inventory of MAX6802UR26D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6802UR26D3-T is usually 5 days.
3.What payment methods are accepted for MAX6802UR26D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6802UR26D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6802UR26D3-T?
MAX6802UR26D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6802UR26D3-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 MAX6802UR26D3-T?
For technical support, including MAX6802UR26D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6802UR26D3-T requirements.
6.How does Aetrix verify that MAX6802UR26D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6802UR26D3-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 MAX6802UR26D3-T meets industry standards.
7.What is the process for return or replacement of MAX6802UR26D3-T?
All MAX6802UR26D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6802UR26D3-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 MAX6802UR26D3-T part is unused and in its original packaging.
Return procedure for MAX6802UR26D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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