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Analog Devices Inc./Maxim Integrated MAX6802UR46D3+
- Part No.:
- MAX6802UR46D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6802UR46D3+.pdf
- Description:
- MAX6802 3-PIN, LOW-POWER MICROPR
- Quantity:
- Payment:
- Shipping:
Inventory:6,504
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Product details
Overview
The MAX6802UR46D3+ from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 4.63V power supplies in embedded systems. It asserts reset during power-up, brownout, and power-down events with a guaranteed 100ms minimum timeout, operates down to VCC = 1.0V, draws only 5µA typical supply current, and is housed in a 3-pin SOT23 package for space-constrained applications such as portable instrumentation and automotive control modules.
For engineers reviewing the MAX6802UR46D3+ datasheet, MAX6802UR46D3+ pinout, MAX6802UR46D3+ application, or MAX6802UR46D3+ equivalent, key selection criteria include its factory-trimmed 4.63V reset threshold, open-drain output architecture enabling bidirectional reset pin interfacing (e.g., Motorola 68HC11), immunity to sub-30µs VCC transients at 100mV overdrive, and guaranteed reset validity across -40°C to +125°C.
Technical Context
This device implements a precision bandgap-based reset comparator with factory-trimmed threshold accuracy of ±3% over temperature, coupled to a temperature-stable internal timer that guarantees ≥100ms reset pulse width after VCC rises above 4.63V. Its open-drain RESET output requires an external pullup resistor and supports wired-OR configurations.
The IC's BiCMOS process enables ultra-low 5µA supply current at 5V while maintaining robust transient immunity-rejecting negative VCC glitches up to 30µs when overdriven by 100mV-and ensures valid reset assertion down to VCC = 1.0V, distinguishing it from the 0.7V minimum of push/pull variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | Factory-trimmed 4.63V (±3% over -40°C to +125°C); ensures reliable detection of 4.63V supply brownout without external calibration. |
| Reset Timeout Period | 100ms minimum after VCC rises above threshold; meets JEDEC JESD78 latch-up immunity timing requirements for µP initialization. |
| Supply Voltage Range | 1.0V to 5.5V; guarantees correct reset state down to 1.0V VCC, enabling operation during deep brownout conditions where push/pull variants fail. |
| Supply Current | 5µA typical at 5V/25°C; reduces quiescent power in battery-backed systems by >95% versus discrete reset solutions. |
| Output Type | Open-drain active-low RESET; allows direct interface with bidirectional µP reset pins (e.g., 68HC11) using a single pullup resistor. |
| VOL (RESET Low) | 0.4V max at 1.2mA sink and VCC ≥ 4.25V; ensures solid logic-low assertion even under high-noise industrial supply conditions. |
| Transient Immunity | Rejects VCC glitches ≤30µs duration at 100mV overdrive; prevents false resets from switching noise or ESD-induced supply dips. |
Pinout & Package
MAX6802UR46D3+ is packaged in a RoHS-compliant 3-pin SOT23 (U3-1) package with 0.95mm pitch, footprint-compatible with industry-standard 3-pin supervisory circuits and optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage; must be connected directly to system ground plane to maintain noise immunity. |
| 2 | RESET | Open-drain active-low reset output; requires external pullup resistor (typically 10–100kΩ) to VCC or another logic rail for proper level translation. |
| 3 | VCC | Power supply input; monitors this voltage for reset assertion; decoupling capacitor (0.1µF ceramic) required within 5mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain output architecture | Enables wired-OR reset bus sharing and seamless interfacing with µPs having bidirectional reset pins (e.g., Motorola 68HC11), eliminating level-shifter components. |
| Factory-trimmed 4.63V threshold | Eliminates need for external resistive divider or trimming potentiometer, reducing BOM count and improving long-term voltage-monitoring stability. |
| 100ms minimum reset timeout | Guarantees sufficient hold time for slow-starting µPs and peripherals, satisfying boot-sequence timing requirements without external RC networks. |
| 1.0V minimum operating VCC | Ensures deterministic reset behavior during severe brownout-critical for automotive and industrial systems where supply collapse below 1.2V occurs. |
| 4.0µA typical supply current | Extends battery life in portable equipment; enables use in always-on monitoring nodes without compromising runtime. |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Monitoring 5V supply rails in engine control modules subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to MCU during VCC dip below 4.63V, holding reset for ≥100ms post-recovery. Use Value: Prevents MCU corruption during 12V system instability; open-drain output interfaces directly with Infineon AURIX™ bidirectional reset pins without added logic. |
Use Scenario: Power supervision in handheld glucose meters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Detecting battery voltage decay below 4.63V and initiating controlled shutdown sequence via µC reset signal. Use Value: 5µA quiescent current extends usable battery life beyond 12 months in standby; 1.0V VCC operation ensures reset remains valid until battery reaches end-of-discharge. |
| Industrial PLC I/O Module | Smart Energy Meter |
|
Use Scenario: Ensuring reliable µP restart after AC line interruption or surge-induced supply sag in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Providing glitch-immune reset generation with 30µs transient rejection margin, synchronized to 4.63V rail recovery. Use Value: Eliminates need for external RC filter or Schmitt-trigger buffer; SOT23 footprint saves >25mm² board area versus SO-8 alternatives. |
Use Scenario: Monitoring auxiliary 5V DC-DC output powering metrology ASIC and communication subsystems. IC Role / Device Role / Timing Role: Asserting reset to ARM Cortex-M0 host processor when 5V rail drops below 4.63V due to transformer saturation or rectifier failure. Use Value: Factory-trimmed threshold removes calibration step in production test; -40°C to +125°C rating supports outdoor meter deployment in extreme climates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6346TUT46+T | Push/pull active-low RESET output; same 4.63V threshold and 100ms timeout; operates down to 0.7V VCC. | Requires no external pullup; unsuitable for wired-OR or bidirectional µP reset pin interfaces. | Select when board layout prohibits external pullup or when interfacing with unidirectional reset inputs only. |
| TPS3808G33DBVR | Adjustable threshold via external resistor divider; 3.3V fixed option available; 200ms timeout; 1.4µA supply current. | Lacks factory-trimmed precision; requires two external resistors; not qualified for automotive temperature range. | Select when threshold flexibility outweighs accuracy needs and automotive qualification is unnecessary. |
Compared with MAX6802UR46D3+, MAX6346TUT46+T offers simpler drive but loses bidirectional compatibility, while TPS3808G33DBVR trades precision and qualification for ultra-low current and adjustability-making MAX6802UR46D3+ optimal for space-constrained, automotive-grade, open-drain–dependent designs.
Availability
MAX6802UR46D3+ is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, industrial PLC I/O modules, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6802UR46D3+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and computing applications.
The MAX6800/MAX6801/MAX6802 family delivers precision, low-power µP supervisory functions in minimal 3-pin SOT23 packages-designed specifically for cost-sensitive, space-constrained embedded systems needing guaranteed reset timing and supply-voltage immunity.
FAQ
What is the exact reset threshold voltage of the MAX6802UR46D3+?
The MAX6802UR46D3+ has a factory-trimmed reset threshold of 4.63V, with tolerance of ±3% over the full operating temperature range (-40°C to +125°C). This value is confirmed in Table 1 of the official datasheet and applies specifically to the "46" suffix variant. The MAX6802UR46D3+ does not require external calibration or resistor dividers to achieve this accuracy.
Does the MAX6802UR46D3+ support operation during deep brownout conditions?
Yes, the MAX6802UR46D3+ guarantees correct reset-state behavior down to VCC = 1.0V, unlike the MAX6800/MAX6801 variants which are rated to 0.7V. This ensures deterministic reset assertion and release even as the supply collapses toward end-of-life battery voltage or during severe automotive cold-crank events-critical for fail-safe system behavior.
Why does the MAX6802UR46D3+ use an open-drain output instead of push/pull?
The MAX6802UR46D3+ uses an open-drain output to enable direct interfacing with microprocessors featuring bidirectional reset pins-such as the Motorola 68HC11-by allowing external pullup to any compatible voltage rail. This architecture supports wired-OR reset buses and avoids contention when multiple devices share a common reset line, a capability not available with push/pull outputs like those in the MAX6800/MAX6801 series.
What is the minimum reset timeout period specified for the MAX6802UR46D3+?
The MAX6802UR46D3+ provides a guaranteed minimum reset timeout period of 100ms after VCC rises above the 4.63V threshold. This value is factory-programmed and confirmed in the Ordering Information table and Electrical Characteristics section. The actual timeout may extend up to 200ms at temperature extremes, ensuring robust compliance with µP boot-sequence timing requirements.
Is the MAX6802UR46D3+ suitable for automotive applications?
Yes, the MAX6802UR46D3+ is rated for operation from -40°C to +125°C and is available in automotive-qualified versions (denoted by "/V" suffix). While the base MAX6802UR46D3+ is lead-free and RoHS-compliant, its electrical specifications-including 1.0V minimum VCC operation, 30µs transient immunity, and 4.63V threshold stability-are fully validated across the extended temperature range required for under-hood automotive electronics.
MAX6802UR46D3+ 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:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6802UR46D3+ FAQ
1.How can I place an order for MAX6802UR46D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6802UR46D3+ 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 MAX6802UR46D3+ reliable?
The price and inventory of MAX6802UR46D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6802UR46D3+ is usually 5 days.
3.What payment methods are accepted for MAX6802UR46D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6802UR46D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6802UR46D3+?
MAX6802UR46D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6802UR46D3+ 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 MAX6802UR46D3+?
For technical support, including MAX6802UR46D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6802UR46D3+ requirements.
6.How does Aetrix verify that MAX6802UR46D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6802UR46D3+ 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 MAX6802UR46D3+ meets industry standards.
7.What is the process for return or replacement of MAX6802UR46D3+?
All MAX6802UR46D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6802UR46D3+, 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 MAX6802UR46D3+ part is unused and in its original packaging.
Return procedure for MAX6802UR46D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6802UR46D3+ Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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