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Analog Devices Inc./Maxim Integrated MXD1812XR41
- Part No.:
- MXD1812XR41
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1812XR41.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,293
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Product details
Overview
MXD1812XR41 from Maxim Integrated is a precision microprocessor reset supervisor IC designed for +5V systems, featuring an active-high push-pull RESET output, 4.12V factory-set reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and operation down to VCC = +1V. It monitors supply voltage integrity in embedded controllers and portable equipment, asserting reset during power-up, brownout, or supply collapse.
For engineers reviewing the MXD1812XR41 datasheet, MXD1812XR41 pinout, MXD1812XR41 application, or MXD1812XR41 equivalent, key selection criteria include its active-high push-pull output topology, SC70-3 package compatibility, guaranteed VCC = +1V logic validity, transient-immune reset comparator, and absence of manual-reset debounce (unlike MXD1813/MXD1818).
Technical Context
The MXD1812XR41 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 4.12V, triggering an internal timer that holds RESET high for ≥100ms after VCC recovers above threshold. Its push-pull output drives directly into CMOS inputs without external pullup, eliminating board-level components.
Unlike MXD1813/MXD1818 variants, MXD1812XR41 lacks manual-reset input detection and debouncing circuitry - its RESET pin serves only as output. It operates across -40°C to +105°C with 4μA typical supply current and tolerates fast VCC transients up to 20μs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.12V ±2.5% over -40°C to +105°C - ensures reliable reset assertion before 5V system logic fails |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP initialization and clock stabilization |
| Supply Current | 4μA typical at +3.6V - enables battery-powered operation for >10 years in low-duty-cycle systems |
| VCC Operating Range | +1.0V to +5.5V - maintains valid RESET output state even during deep brownout conditions |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct CMOS interface |
| 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 applications |
Pinout & Package
MXD1812XR41 is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with pin 1 = RESET (active-high push-pull output), pin 2 = VCC (supply and threshold monitor input), and pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output - drives high during reset assertion; sinks 10mA when low, sources 350μA when high |
| 2 | VCC | Supply input and reset-threshold reference - powers internal comparator and timer; monitored for undervoltage |
| 3 | GND | Ground reference - provides return path for internal circuitry and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | Factory-trimmed 4.12V with ±2.5% accuracy over full temperature range - eliminates calibration overhead |
| No external components required | Self-contained reset generation - no capacitors, resistors, or pullups needed for basic operation |
| Low-power operation | 4μA typical ICC - extends battery life in portable instrumentation and handheld devices |
| VCC = +1V logic validity | Guaranteed RESET output state integrity down to 1V supply - prevents metastability in deep brownout |
| Transient immunity | Rejects VCC glitches ≤20μs at 100mV overdrive - avoids spurious resets in noisy power environments |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing and brownout recovery in programmable logic controller CPU modules operating from unregulated 5V rails. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring deterministic μP boot after AC dropout or DC supply sag. Use Value: 100ms reset pulse guarantees full oscillator startup and register initialization before code execution resumes. |
Use Scenario: Battery-backed vital-signs monitoring devices requiring fail-safe restart on low-battery shutdown. IC Role / Device Role / Timing Role: Active-high reset supervisor interfacing directly with ARM Cortex-M0+ reset pin. Use Value: Push-pull output eliminates external pullup, reducing BOM count and PCB area in compact wearable form factors. |
| Set-Top Box Power Management | Smart Meter MCU Supervision |
Use Scenario: Cold-start reliability in cable/satellite receivers powered by switching supplies with slow ramp-up. IC Role / Device Role / Timing Role: Voltage monitor asserting reset until 5V rail stabilizes above 4.12V and remains valid for ≥100ms. Use Value: Factory-set 4.12V threshold matches nominal 5V rail tolerance, avoiding false triggers during normal ripple. |
Use Scenario: Tamper-resistant electricity meters operating in wide ambient temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Industrial-grade reset supervisor maintaining valid logic state down to VCC = +1V during capacitor discharge. Use Value: Guaranteed operation to +1V prevents undefined reset behavior during long-duration brownouts common in grid-edge deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR41D3T | Same 4.12V threshold, SOT23-3 package, but open-drain active-low output | Requires external pullup; incompatible with active-high reset inputs | Select only if system design accommodates active-low signaling and external biasing |
| TPS3808G33DBVR | 3.3V threshold, adjustable delay, higher quiescent current (12μA), SOT23-6 | Not pin-compatible; requires different layout and timing configuration | Choose when adjustable timeout or dual-voltage monitoring is required |
Compared with MXD1812XR41, MAX809TR41D3T demands external pullup and inverts logic polarity, while TPS3808G33DBVR offers configurability at the cost of larger footprint and higher power - MXD1812XR41 delivers optimal integration for fixed-threshold, active-high, ultra-low-power 5V supervision.
Availability
MXD1812XR41 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, set-top box power management, smart meter MCU supervision, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MXD1812XR41 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–MXD1813/MXD1815–MXD1818 family was designed specifically for low-cost, space-constrained microprocessor reset supervision in portable and industrial systems requiring high accuracy and minimal external components.
FAQ
What is the reset threshold voltage of the MXD1812XR41?
The MXD1812XR41 has a factory-set reset threshold of 4.12V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +105°C). This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix R41, and applies specifically to the MXD1812 variant in both SC70 and SOT23 packages.
Does the MXD1812XR41 support manual reset functionality?
No, the MXD1812XR41 does not include manual reset detection or debouncing circuitry. Unlike MXD1813/MXD1818 variants, its RESET pin is output-only and cannot be used to trigger reset via external switch. Manual reset capability is exclusive to the MXD1813 and MXD1818 members of the family.
What package type is used for the MXD1812XR41?
The MXD1812XR41 uses the 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm with a 0.65mm pitch. This is explicitly defined in the Ordering Information table and Pin Configurations diagram, and distinguishes it from the SOT23-3 variant (MXD1812UR41-T).
Is the MXD1812XR41 compatible with 3.3V systems?
No - the MXD1812XR41 is specified for +5V systems only. Its 4.12V reset threshold is optimized for nominal 5V rails; using it with 3.3V supplies would cause continuous reset assertion. For 3.3V systems, select MXD1815–MXD1818 variants (e.g., MXD1815XR31 with 3.06V threshold).
What is the minimum VCC level at which MXD1812XR41 guarantees valid RESET output?
The MXD1812XR41 guarantees valid RESET logic state down to VCC = +1.0V, as stated in the Absolute Maximum Ratings and Electrical Characteristics sections. This ensures deterministic behavior during deep brownout conditions where many competing supervisors fail to maintain output integrity.
MXD1812XR41 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:
- 4.12V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MXD1812XR41 FAQ
1.How can I place an order for MXD1812XR41 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1812XR41 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 MXD1812XR41 reliable?
The price and inventory of MXD1812XR41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1812XR41 is usually 5 days.
3.What payment methods are accepted for MXD1812XR41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1812XR41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1812XR41?
MXD1812XR41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1812XR41 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 MXD1812XR41?
For technical support, including MXD1812XR41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1812XR41 requirements.
6.How does Aetrix verify that MXD1812XR41 is sourced from the original manufacturer or authorized distributors?
All MXD1812XR41 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 MXD1812XR41 meets industry standards.
7.What is the process for return or replacement of MXD1812XR41?
All MXD1812XR41 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1812XR41, 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 MXD1812XR41 part is unused and in its original packaging.
Return procedure for MXD1812XR41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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