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Analog Devices Inc./Maxim Integrated MXD1811XR41
- Part No.:
- MXD1811XR41
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1811XR41.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,470
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Product details
Overview
MXD1811XR41 from Maxim Integrated is an open-drain, active-low microprocessor reset supervisor IC designed for +5V systems. It monitors VCC and asserts RESET when voltage falls below 4.12V (±2.5%), maintains reset for ≥100ms after VCC recovery, features an internal 5.5kΩ pullup resistor, consumes only 4μA typical supply current, and operates across –40°C to +105°C - ideal for portable industrial controllers requiring reliable brownout protection.
For engineers reviewing the MXD1811XR41 datasheet, MXD1811XR41 pinout, MXD1811XR41 application, or MXD1811XR41 equivalent, key selection criteria include its 4.12V reset threshold accuracy, SC70-3 open-drain output compatibility with bidirectional μP reset pins, guaranteed RESET validity down to VCC = +1V, and immunity to sub-10μs VCC transients per threshold overdrive.
Technical Context
The MXD1811XR41 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its factory-trimmed 4.12V threshold. Its internal timer generates a fixed 100ms minimum reset timeout upon VCC recovery, independent of temperature or supply variation.
This device uses BiCMOS process technology to achieve low quiescent current (4μA typ.) while maintaining robust noise immunity - rejecting transients as short as 1.5μs at 4.12V–VCC = 20mV and up to 100μs at 4.12V–VCC = 200mV - ensuring stable reset assertion during noisy power events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.12V ±2.5% - ensures reliable detection of +5V supply brownout before μP operation becomes unstable |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for full μP initialization after power recovery |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable monitoring devices |
| Operating Temperature | –40°C to +105°C - supports deployment in automotive under-hood and industrial control environments |
| Output Type | Open-drain active-low with 5.5kΩ internal pullup - eliminates external resistor and interfaces directly with bidirectional μP reset pins |
| VCC Validity Range | Functions correctly down to VCC = +1V - maintains deterministic reset state during deep undervoltage conditions |
| Transient Immunity | Rejects VCC glitches ≤100μs at 200mV overdrive - prevents spurious resets in electrically noisy systems |
Pinout & Package
MXD1811XR41 is housed in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density PCB layouts in space-constrained portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Open-drain active-low output; sinks current when asserted; pulled high internally to VCC via 5.5kΩ resistor |
| 2 (SC70) | VCC | Main supply input and reset threshold reference; accepts 1.0V to 5.5V; powers internal comparator and timer |
| 3 (SC70) | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates precision voltage reference, comparator, timer, and pullup resistor - reduces BOM count and layout area |
| Factory-set 4.12V threshold | Eliminates trimming or calibration; ±2.5% accuracy over full temperature range ensures consistent system-level reset behavior |
| Guaranteed operation to VCC = +1V | Ensures predictable RESET logic state even during severe brownout - critical for fail-safe embedded control |
| Low 4μA supply current | Minimizes standby power draw in battery-powered instruments and IoT edge nodes without sacrificing response speed |
| SC70-3 footprint compatibility | Enables drop-in replacement for other 3-pin supervisors (e.g., DS181x) in existing compact designs |
Applications
| Industrial Controllers | Portable Test Equipment |
|---|---|
Use Scenario: PLC I/O modules powered from unregulated 5V rails subject to load-switching transients. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-low RESET to halt firmware execution until stable 5V is restored. Use Value: Prevents corrupted register writes or memory access during brownout by enforcing ≥100ms reset hold time after recovery. |
Use Scenario: Handheld multimeter with lithium coin-cell backup and intermittent 5V USB charging. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection on main 5V rail, interfacing directly with MSP430's bidirectional RST/NMI pin. Use Value: Internal 5.5kΩ pullup eliminates external component, reducing bill-of-materials and PCB area in ultra-compact form factor. |
| Set-Top Box Power Management | Network Edge Sensor Hub |
Use Scenario: Consumer STB with multiple 5V subsystems (tuner, decoder, UI) sharing a single switching regulator. IC Role / Device Role / Timing Role: Supervises main 5V rail and triggers system-wide reset if voltage sags below 4.12V due to transient overload. Use Value: ±2.5% threshold accuracy ensures consistent reset point across units and temperature, avoiding field failures from marginal brownout tolerance. |
Use Scenario: LoRaWAN sensor node with 5V DC-DC converter powering MCU, radio, and analog front-end. IC Role / Device Role / Timing Role: Detects 5V rail collapse during battery-switchover and holds MCU in reset until stable power resumes. Use Value: 4μA quiescent current extends battery life while maintaining fail-safe reset capability during extended sleep cycles. |
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 push-pull output (no internal pullup); requires external pullup for bidirectional μP interface | Lacks manual reset debounce; not suitable where mechanical switch integration is needed | Choose when board layout already includes pullup or μP reset pin is unidirectional |
| TPS3808G33DBVR | Adjustable threshold (via external resistor divider); 3.3V nominal reset point; higher 12μA ICC; no internal pullup | Requires external components for 4.12V setting; incompatible with direct bidirectional μP connection without added circuitry | Select only if programmability or tighter 1% threshold tolerance is required - adds cost and complexity |
Compared with MAX809TR41D3T and TPS3808G33DBVR, MXD1811XR41 delivers plug-and-play integration for +5V systems with bidirectional reset pins, eliminating external resistors while guaranteeing timing and accuracy specs without configuration overhead.
Availability
MXD1811XR41 is available at Aetrix Electronics and suitable for industrial controllers, portable test equipment, set-top boxes, and network edge sensor hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1811XR41 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, communications, and consumer applications.
The MXD1810–MXD1818 family was designed specifically to provide low-cost, low-power, factory-trimmed reset supervision for microprocessor-based systems operating at +2.5V, +3.0V, +3.3V, and +5V supply rails.
FAQ
What is the exact reset threshold voltage of MXD1811XR41 and how tightly is it specified?
The MXD1811XR41 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 "MXD181_ _ R41" row, with min/typ/max values of 4.00V/4.12V/4.24V. The threshold is trimmed during production and does not require external calibration.
Does MXD1811XR41 support manual reset via an external pushbutton?
No, MXD1811XR41 does not include manual reset debounce functionality. That feature is exclusive to MXD1813/MXD1818 variants (e.g., MXD1813XR41). The MXD1811XR41 is an open-drain active-low reset supervisor with voltage monitoring only - its RESET pin is output-only and must not be driven externally.
What package type and dimensions does MXD1811XR41 use?
MXD1811XR41 is supplied in a 3-pin SC70 package (outline X3-2), with body dimensions of 2.0mm × 2.1mm × 0.95mm and a standard 0.65mm lead pitch. This matches the land pattern referenced as 90-0208 in Maxim's package documentation and is compatible with reflow soldering per JEDEC J-STD-020.
Can MXD1811XR41 operate reliably when VCC drops below 2.0V?
Yes - MXD1811XR41 is guaranteed to maintain correct RESET logic state down to VCC = +1.0V (minimum), as stated in Absolute Maximum Ratings and Electrical Characteristics. Its internal circuitry remains functional and deterministic in this range, making it suitable for deep brownout detection scenarios where other supervisors may lose output validity.
Is an external pullup resistor required when using MXD1811XR41 with a microcontroller that has a bidirectional reset pin?
No. MXD1811XR41 integrates a 5.5kΩ internal pullup resistor on its open-drain RESET output, explicitly enabling direct connection to bidirectional μP reset pins (e.g., Motorola 68HC11, MSP430) without external components. This is confirmed in Pin Descriptions and Applications Information sections of the datasheet.
MXD1811XR41 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:
- Open Drain or Open Collector
- 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
MXD1811XR41 FAQ
1.How can I place an order for MXD1811XR41 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1811XR41 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 MXD1811XR41 reliable?
The price and inventory of MXD1811XR41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1811XR41 is usually 5 days.
3.What payment methods are accepted for MXD1811XR41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1811XR41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1811XR41?
MXD1811XR41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1811XR41 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 MXD1811XR41?
For technical support, including MXD1811XR41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1811XR41 requirements.
6.How does Aetrix verify that MXD1811XR41 is sourced from the original manufacturer or authorized distributors?
All MXD1811XR41 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 MXD1811XR41 meets industry standards.
7.What is the process for return or replacement of MXD1811XR41?
All MXD1811XR41 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1811XR41, 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 MXD1811XR41 part is unused and in its original packaging.
Return procedure for MXD1811XR41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1811XR41 Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
Diodes Incorporated
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