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Analog Devices Inc./Maxim Integrated MXD1810XR46+
- Part No.:
- MXD1810XR46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1810XR46+.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
MXD1810XR46+ from Maxim Integrated is a precision +5V microprocessor reset supervisor IC with active-low open-drain RESET output, 4.62V ±2.5% factory-trimmed reset threshold, 100ms minimum reset timeout, and operation down to VCC = +1V. It monitors power supply integrity in embedded controllers and portable systems requiring reliable brownout protection without external components.
For engineers reviewing the MXD1810XR46+ datasheet, MXD1810XR46+ pinout, MXD1810XR46+ application, or MXD1810XR46+ equivalent, key selection criteria include reset threshold accuracy over temperature, manual-reset debounce capability (not present in this variant), open-drain drive strength, SC70-3 package footprint, and compatibility with 5V μP reset inputs requiring active-low assertion.
Technical Context
This device implements a precision bandgap-based voltage comparator monitoring VCC against a fixed internal reference, triggering an internal timer that holds RESET low for ≥100ms after VCC rises above 4.62V. The comparator ignores transients ≤1.5μs at full overdrive, ensuring immunity to short supply glitches.
As an open-drain output device, MXD1810XR46+ relies on its internal 5.5kΩ pullup resistor to VCC for high-state biasing and sinks up to 10mA when asserted. It operates across -40°C to +105°C with supply current as low as 4μA at +3.6V, enabling use in battery-powered equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62V ±2.5% - ensures reliable reset assertion before 5V system brownout affects μP operation |
| Reset Timeout | 100ms min - guarantees sufficient hold time for μP initialization and peripheral stabilization | Supply Current | 4μA typ at +3.6V - enables multi-year battery life in always-on monitoring applications |
| Operating Voltage | +1.0V to +5.5V - supports valid RESET output even during deep brownout recovery |
| Output Type | Open-drain active-low - interfaces directly with bidirectional μP reset pins without external pullup |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for space-constrained portable designs |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded environments |
Pinout & Package
MXD1810XR46+ is housed in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.9mm, with gull-wing leads and RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and reset threshold sensing node - must be decoupled locally to suppress noise |
| 2 | RESET | Active-low open-drain output - requires no external pullup due to integrated 5.5kΩ resistor to VCC |
| 3 | GND | Analog and digital ground reference - must connect to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, comparator, timer, and pullup eliminate BOM cost and layout area |
| ±2.5% reset threshold accuracy | Guaranteed over full -40°C to +105°C range - reduces need for margining in critical 5V systems |
| Transient immunity | Rejects VCC glitches <1.5μs - prevents false resets during switching noise or ESD events |
| Low 4μA quiescent current | Enables continuous monitoring in energy-harvesting or coin-cell-powered devices |
| Valid RESET down to VCC = +1V | Ensures deterministic reset state during deep undervoltage recovery, avoiding metastability |
Applications
| Computers and Controllers | Intelligent Instruments |
|---|---|
Use Scenario: Monitoring 5V power rails in industrial PLCs and edge gateways during AC line sags or DC-DC converter faults. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt μP execution until stable 5V is restored. Use Value: Prevents corrupted firmware writes and bus contention by enforcing 100ms minimum reset hold after recovery. | Use Scenario: Power supervision in handheld multimeters and portable oscilloscopes powered by rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Open-drain RESET output interfacing with bidirectional μC reset pins without external components. Use Value: Eliminates pullup resistor and saves PCB area while maintaining guaranteed 4.62V trip point across temperature. |
| Set-Top Boxes | Printers |
Use Scenario: Ensuring clean boot sequence in cable/satellite receivers after hot-swap of USB peripherals or HDMI hot-plug events. IC Role / Device Role / Timing Role: Brownout detector holding RESET low during transient 5V dips caused by sudden load surges. Use Value: Avoids GUI lockups or channel tuning errors by enforcing deterministic restart timing independent of software. | Use Scenario: Reset coordination in multifunction printers where 5V logic rails power motor drivers, sensors, and communication interfaces. IC Role / Device Role / Timing Role: Single-point reset source synchronizing μP, FPGA, and ASIC power-up sequencing. Use Value: Guarantees all subsystems remain held in reset until 5V stabilizes within ±2.5% tolerance, preventing race conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 4.63V reset threshold, SOT23-3 package, push-pull output | Requires external pullup for bidirectional μP interfaces; lacks internal pullup | Select when board layout already uses push-pull topology and external pullup is acceptable |
| TPS3808G33DBVR | 3.3V reset threshold, adjustable timeout, SOT23-6 package | Designed for 3.3V systems only; incompatible with 5V VCC monitoring | Choose only for 3.3V applications - not a functional substitute for MXD1810XR46+ |
Compared with MAX809TRD3+T, MXD1810XR46+ offers integrated pullup and SC70 size but lacks push-pull drive; versus TPS3808G33DBVR, it targets 5V systems with fixed timing and smaller footprint, making it optimal for space-constrained 5V supervisory roles.
Availability
MXD1810XR46+ is available at Aetrix Electronics and suitable for computers and controllers, intelligent instruments, and set-top boxes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1810XR46+ 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 industrial, automotive, and communications markets.
The MXD1810–MXD1818 family delivers low-power, factory-trimmed reset supervision for 5V and 3.3V/2.5V systems, targeting portable, industrial, and consumer electronics needing high-accuracy voltage monitoring without external components.
FAQ
What is the exact reset threshold voltage of MXD1810XR46+ and how tightly is it specified?
The MXD1810XR46+ has a factory-set reset threshold of 4.62V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +105°C). This specification ensures reliable detection of 5V supply brownouts while accommodating process variation and thermal drift without requiring calibration or external trimming components.
Does MXD1810XR46+ support manual reset via an external pushbutton?
No, MXD1810XR46+ does not include manual reset debounce functionality. That feature is exclusive to the MXD1813 and MXD1818 variants. MXD1810XR46+ provides only power-supply monitoring and automatic reset assertion; external pushbutton reset would require additional circuitry such as a separate debounced switch interface.
What package type and dimensions does MXD1810XR46+ use?
MXD1810XR46+ is supplied in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.9mm with gull-wing leads. Its compact footprint and RoHS-compliant lead-free construction (+T suffix) make it suitable for high-density portable and industrial PCB layouts.
How does the open-drain output of MXD1810XR46+ interface with microprocessors having bidirectional reset pins?
The MXD1810XR46+ open-drain RESET output interfaces directly with bidirectional μP reset pins (e.g., Motorola 68HC11) because its internal 5.5kΩ pullup resistor eliminates the need for an external component. When deasserted, RESET floats high via the internal resistor; when asserted, it actively pulls low - enabling either the μP or MXD1810XR46+ to control the reset line.
What is the minimum supply voltage at which MXD1810XR46+ guarantees valid RESET output logic states?
MXD1810XR46+ guarantees correct RESET logic state (high or low) down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic behavior during deep brownout recovery, unlike many supervisors that lose output validity below 1.8V or 2.0V.
MXD1810XR46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MXD1810XR46+ FAQ
1.How can I place an order for MXD1810XR46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1810XR46+ 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 MXD1810XR46+ reliable?
The price and inventory of MXD1810XR46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1810XR46+ is usually 5 days.
3.What payment methods are accepted for MXD1810XR46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1810XR46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1810XR46+?
MXD1810XR46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1810XR46+ 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 MXD1810XR46+?
For technical support, including MXD1810XR46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1810XR46+ requirements.
6.How does Aetrix verify that MXD1810XR46+ is sourced from the original manufacturer or authorized distributors?
All MXD1810XR46+ 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 MXD1810XR46+ meets industry standards.
7.What is the process for return or replacement of MXD1810XR46+?
All MXD1810XR46+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1810XR46+, 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 MXD1810XR46+ part is unused and in its original packaging.
Return procedure for MXD1810XR46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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