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Analog Devices Inc./Maxim Integrated MXD1810UR46+
- Part No.:
- MXD1810UR46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MXD1810UR46+.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:896
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Product details
Overview
MXD1810UR46+ from Maxim Integrated is a precision 5V-system microprocessor reset supervisor IC with active-low open-drain RESET output, factory-trimmed 4.62V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It monitors power supply integrity in embedded controllers and portable equipment, asserting reset during brownout, power-up, and power-down events.
For engineers reviewing the MXD1810UR46+ datasheet, MXD1810UR46+ pinout, MXD1810UR46+ application, or MXD1810UR46+ equivalent, key selection criteria include its 4.62V threshold accuracy, 4μA supply current at +3.6V, internal 5.5kΩ pullup resistor, -40°C to +105°C operating range, and SOT23-3 package compatibility with DS181x-series designs.
Technical Context
The MXD1810UR46+ implements a precision bandgap-based voltage comparator with hysteresis-immune threshold detection and an internal monostable timer for fixed 100ms reset assertion after VCC recovery. Its open-drain RESET output includes an integrated 5.5kΩ pullup to VCC, eliminating external components while supporting bidirectional μP reset interfaces.
Designed for +5V systems, it guarantees valid reset logic states down to VCC = +1V and rejects fast transients via built-in immunity circuitry-no external filtering required. Unlike MXD1813/MXD1818 variants, it lacks manual-reset debounce functionality and push-button detect capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62V ±2.5% over -40°C to +105°C - ensures reliable brownout detection for +5V rails without calibration |
| Supply Current | 4μA at +3.6V - enables multi-year battery life in portable instrumentation and IoT edge nodes |
| Reset Timeout | 100ms minimum - meets JEDEC JESD78 requirement for μP initialization stability |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions |
| Output Type | Active-low open-drain with 5.5kΩ internal pullup - simplifies interface to bidirectional μP reset pins (e.g., Motorola 68HC11) |
| Package | SOT23-3 - space-constrained footprint compatible with legacy DS181x layouts and automated assembly |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded control applications |
Pinout & Package
MXD1810UR46+ is housed in a 3-pin SOT23 package (outline U3-1, land pattern 90-0179), measuring 2.92mm × 1.3mm × 1.0mm. The package is RoHS-compliant (lead-free), marked "FZIV" per Maxim's top-marking code table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and reset-threshold monitoring node - must be connected directly to the monitored +5V rail |
| 2 | RESET | Active-low open-drain output with internal 5.5kΩ pullup to VCC - requires no external pullup; sinks ≥10mA when asserted |
| 3 | GND | Analog and digital ground reference - must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.62V reset threshold | Factory-trimmed ±2.5% tolerance across full temperature range eliminates need for external resistive dividers or calibration |
| No external components required | Integrated pullup, comparator, and timer enable single-chip reset supervision - reduces BOM count and PCB area by >30% vs discrete solutions |
| Low 4μA quiescent current | Enables use in always-on battery-backed systems such as smart meters and portable medical devices without compromising runtime |
| Transient-immune reset detection | Rejects VCC glitches ≤1.5μs at 4.62V overdrive - prevents spurious resets during switching noise or ESD events |
| Valid reset down to VCC = +1V | Ensures deterministic μP state retention during deep undervoltage conditions where most supervisors fail silently |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing and brownout protection in DIN-rail mounted programmable logic controllers operating from unregulated 5V DC supplies. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset pulse and continuous VCC monitoring to prevent firmware corruption during line sags. Use Value: 100ms timeout ensures stable clock and memory initialization before CPU execution begins; 4.62V threshold aligns precisely with 5V rail tolerance limits. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring ultra-low-power reset supervision during sleep/wake cycles. IC Role / Device Role / Timing Role: Reset generator that remains functional down to VCC = +1V, enabling graceful shutdown and restart during battery depletion. Use Value: 4μA supply current extends battery life beyond 5 years in intermittent-use devices; SOT23-3 footprint fits tight PCB real estate constraints. |
| Set-Top Box Power Management | Network Router Boot Integrity |
Use Scenario: Ensuring clean boot sequence in consumer set-top boxes powered from 5V wall adapters subject to load-induced voltage droop. IC Role / Device Role / Timing Role: Voltage monitor asserting RESET until 5V rail stabilizes post-power-on and remains asserted during transient dips below 4.62V. Use Value: Internal 5.5kΩ pullup eliminates external resistor, reducing component count and improving layout reliability in high-volume manufacturing. |
Use Scenario: Preventing corrupted firmware execution in enterprise-grade routers during AC/DC converter startup or thermal throttling events. IC Role / Device Role / Timing Role: Brownout detector interfacing directly to bidirectional reset pin of ARM-based SoC, sharing reset control with watchdog timer. Use Value: Open-drain output allows wire-OR configuration with other reset sources; ±2.5% threshold accuracy avoids false triggers near 5V nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 4.63V threshold, 140ms timeout, 1.2μA ICC at +3.6V, SOT23-3 | Lacks internal pullup - requires external 100kΩ resistor for open-drain interface | Select when lowest possible quiescent current is critical and external component addition is acceptable |
| TPS3808G33DBVR | 3.3V threshold, push-pull output, 200ms timeout, 16μA ICC, SOT23-5 | Different pin count and output polarity - not drop-in; requires PCB redesign | Choose only if system uses 3.3V supply and needs higher drive strength or longer timeout |
Compared with MAX809TRD3+T, MXD1810UR46+ offers integrated pullup and tighter threshold accuracy but draws slightly more current; versus TPS3808G33DBVR, it provides correct 4.62V threshold for 5V systems and smaller 3-pin footprint, though with lower output drive capability.
Availability
MXD1810UR46+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, set-top box power management, network router boot integrity, and critical μP monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1810UR46+ 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 analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was designed specifically for cost-sensitive, space-constrained microprocessor reset supervision in battery-powered and industrial embedded systems - prioritizing low power, precision thresholds, and minimal external components.
FAQ
What is the exact reset threshold voltage of MXD1810UR46+ and how stable is it over temperature?
The MXD1810UR46+ has a factory-set reset threshold of 4.62V with ±2.5% accuracy over the full -40°C to +105°C operating range. This specification is guaranteed by design and production-tested, ensuring consistent brownout detection across industrial environments without recalibration. The normalized threshold variation graph (toc03) shows less than 1% drift from nominal across temperature, making MXD1810UR46+ highly reliable for 5V system supervision.
Does MXD1810UR46+ support manual reset via an external pushbutton?
No, MXD1810UR46+ does not include manual reset debounce functionality. That feature is exclusive to MXD1813 and MXD1818 variants (e.g., MXD1813UR46+). The MXD1810UR46+ is a basic reset supervisor with automatic VCC monitoring only - it asserts RESET solely in response to VCC falling below 4.62V and holds it for ≥100ms after VCC recovers. External pushbutton integration would require additional circuitry.
Can MXD1810UR46+ operate reliably when VCC drops below 2.0V?
Yes, MXD1810UR46+ guarantees valid RESET/RESET logic states down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. While the device stops functioning entirely below +1.0V, its output remains well-defined throughout the 1.0V–5.5V range - a key differentiator for applications requiring deterministic behavior during deep brownout, such as battery-fail-safe shutdown sequences.
What is the purpose of the internal 5.5kΩ pullup resistor in MXD1810UR46+?
The internal 5.5kΩ pullup resistor on the RESET pin of MXD1810UR46+ enables direct connection to bidirectional microprocessor reset inputs (e.g., Motorola 68HC11) without external components. It ensures the RESET line defaults to high (inactive) when not asserted, allowing either the supervisor or the μP to drive the line low. This eliminates BOM cost and PCB area associated with discrete pullups while maintaining signal integrity up to 10mA sink current.
Is MXD1810UR46+ pin-compatible with older DS181x-series reset ICs?
Yes, MXD1810UR46+ is explicitly stated as pin-compatible with DS181x products in the SOT23 package. Pin 1 is VCC, Pin 2 is RESET (open-drain active-low), and Pin 3 is GND - matching DS1810, DS1811, and related variants. This allows drop-in replacement in existing designs without layout changes, provided the 4.62V threshold and electrical specs meet system requirements.
MXD1810UR46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MXD1810UR46+ FAQ
1.How can I place an order for MXD1810UR46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1810UR46+ 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 MXD1810UR46+ reliable?
The price and inventory of MXD1810UR46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1810UR46+ is usually 5 days.
3.What payment methods are accepted for MXD1810UR46+?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1810UR46+?
MXD1810UR46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1810UR46+ 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 MXD1810UR46+?
For technical support, including MXD1810UR46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1810UR46+ requirements.
6.How does Aetrix verify that MXD1810UR46+ is sourced from the original manufacturer or authorized distributors?
All MXD1810UR46+ 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 MXD1810UR46+ meets industry standards.
7.What is the process for return or replacement of MXD1810UR46+?
All MXD1810UR46+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1810UR46+, 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 MXD1810UR46+ part is unused and in its original packaging.
Return procedure for MXD1810UR46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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