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Analog Devices Inc./Maxim Integrated MXD1813XR41
- Part No.:
- MXD1813XR41
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1813XR41.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MXD1813XR41 from Maxim Integrated is a low-power microprocessor reset supervisor IC designed for +5V systems, featuring an open-drain active-low RESET output with internal 5.5kΩ pullup resistor, factory-set 4.12V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and debounced manual-reset detection triggered by ≥1.5μs low pulse on RESET pin. It ensures reliable power-on/brownout reset in portable and industrial controllers.
For engineers reviewing the MXD1813XR41 datasheet, MXD1813XR41 pinout, MXD1813XR41 application, or MXD1813XR41 equivalent, key selection considerations include its 4.12V VTH tolerance, SC70-3 package footprint, manual-reset debounce timing, guaranteed RESET validity down to VCC = +1V, and compatibility with bidirectional μP reset pins without external pullups.
Technical Context
The MXD1813XR41 implements a precision voltage comparator with hysteresis-free threshold detection at 4.12V nominal, coupled to a monostable timer that asserts RESET for ≥100ms after VCC rises above VTH or after release of a debounced manual reset. Its internal pullup enables direct interface with bidirectional μP reset inputs.
It features transient immunity against negative-going VCC glitches up to 80μs at 100mV overdrive, operates from VCC = +1.0V to +5.5V, draws only 4μA typical supply current at +3.6V, and maintains functional RESET output logic state across -40°C to +105°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH) | 4.12V (min 4.00V, max 4.24V) - precisely monitors +5V rail for brownout; ±2.5% accuracy ensures consistent reset activation across temperature. |
| Reset Timeout Period (tRP) | 100ms (min) - guarantees sufficient hold time for μP initialization during power-up or recovery from undervoltage. |
| Supply Current (ICC) | 4μA (typ at +3.6V) - enables multi-year battery life in portable equipment without compromising reset reliability. |
| Manual Reset Detect Pulse Width | ≥1.5μs - rejects mechanical switch bounce while enabling fast, deterministic user-initiated reset. |
| Operating Temperature | -40°C to +105°C - supports deployment in automotive under-hood, industrial PLC, and outdoor embedded systems. |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint saves PCB area vs. SOT23; compatible with high-density automated assembly. |
| VCC Range | +1.0V to +5.5V - ensures valid RESET output even during deep brownout; supports operation down to near-zero supply collapse. |
Pinout & Package
MXD1813XR41 is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with 0.65mm pitch, 0.9mm height, and RoHS-compliant lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Open-drain active-low reset output with manual-reset detect input | Drives low during VCC undervoltage or after ≥1.5μs external low pulse; internal 5.5kΩ pullup eliminates need for external resistor; interfaces directly with bidirectional μP reset pins. |
| 2 (VCC) | Power supply input and reset-threshold monitor reference | Supplies internal circuitry and serves as analog input to comparator; device remains functional down to +1.0V, ensuring reset assertion through deep brownout. |
| 3 (GND) | Ground reference | Common return path for internal comparator, timer, and output stage; must be low-impedance to maintain noise immunity and accurate threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Debounced manual-reset input | Accepts ≥1.5μs low pulse on RESET pin to initiate 100ms reset period - eliminates external RC debounce networks and reduces BOM count. |
| Internal pullup resistor | 5.5kΩ (typ) integrated pullup enables open-drain RESET to drive high when inactive - removes need for external pullup and simplifies μP interface. |
| Transient-immune reset comparator | Rejects VCC glitches ≤80μs at 100mV overdrive - prevents spurious resets during switching noise or ESD events. |
| Low-power operation | 4μA typical ICC at +3.6V - extends battery runtime in portable instrumentation and handheld devices without sacrificing supervision integrity. |
| Guaranteed RESET validity to VCC = +1V | Output logic state remains defined down to +1.0V supply - ensures deterministic reset behavior during catastrophic power collapse. |
Applications
| Industrial Programmable Logic Controllers (PLCs) | Battery-Powered Handheld Test Equipment |
|---|---|
|
Use Scenario: PLC CPU power rails experience intermittent brownouts due to shared industrial power distribution and motor switching transients. IC Role / Device Role / Timing Role: MXD1813XR41 continuously monitors +5V VCC and asserts RESET within 5μs of falling below 4.12V, holding it for ≥100ms after recovery to prevent corrupted firmware execution. Use Value: Eliminates uncontrolled reboots and memory corruption during factory floor voltage sags, improving system uptime and data integrity. |
Use Scenario: Multimeter or oscilloscope probe powered by two AA cells experiences gradual voltage decay and momentary dips during button presses or backlight activation. IC Role / Device Role / Timing Role: MXD1813XR41 provides precise 4.12V reset threshold and 4μA quiescent current, enabling >500-hour battery life while guaranteeing clean startup at end-of-life voltage. Use Value: Prevents erratic display or measurement errors caused by marginal supply voltage, extending usable battery range without adding discrete components. |
| Set-Top Box Power Management | Embedded Network Router Control Plane |
|
Use Scenario: STB mainboard uses +5V rail derived from AC/DC adapter; cold-start and hot-plug events cause slow-rising VCC with potential undershoot. IC Role / Device Role / Timing Role: MXD1813XR41's 100ms fixed timeout and 4.12V threshold ensure μP remains held in reset until +5V stabilizes above specification, avoiding boot failures. Use Value: Reduces field returns due to "black screen" or failed firmware load during unreliable power-up sequences. |
Use Scenario: Router control processor requires fail-safe reboot upon PoE injector voltage sag or Ethernet cable disconnect/reconnect events. IC Role / Device Role / Timing Role: MXD1813XR41's manual-reset detect feature allows GPIO-driven reset initiation via software-controlled I/O line, synchronized with watchdog timeout or link-loss detection. Use Value: Enables controlled, glitch-free system restart without requiring physical button or external logic, improving remote manageability and MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR41D2T | Same 4.12V reset threshold, SOT23-3 package, but push-pull output (no internal pullup); no manual-reset detect. | Lacks debounced manual reset; requires external pullup for bidirectional μP interface; higher ICC (15μA typ). | Select when board layout already includes pullup or manual reset is handled externally; not suitable for space-constrained SC70 designs. |
| TPS3808G33DBVR | 3.3V reset threshold (not 4.12V); adjustable timeout; 1.5μA ICC; SOT23-5 package (extra enable pin). | Designed for +3.3V systems, not +5V; requires external capacitor for timeout tuning; larger footprint and pin count. | Choose only if migrating to lower-voltage rail or needing programmable delay; incompatible drop-in replacement for MXD1813XR41. |
Compared with MAX809TR41D2T and TPS3808G33DBVR, MXD1813XR41 uniquely combines 4.12V threshold, SC70-3 footprint, open-drain output with integrated pullup, and hardware-debounced manual reset - making it optimal for compact, +5V-powered embedded systems requiring robust, self-contained reset supervision.
Availability
MXD1813XR41 is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered test instruments, set-top boxes, and embedded network routers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1813XR41 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was engineered specifically for cost-sensitive, space-constrained microprocessor reset supervision in portable and industrial equipment, emphasizing ultra-low power, precision threshold accuracy, and integrated manual-reset functionality.
FAQ
What is the exact reset threshold voltage of MXD1813XR41 and how tightly is it specified?
The MXD1813XR41 has a factory-trimmed reset threshold of 4.12V, with guaranteed limits of 4.00V (min) and 4.24V (max) over the full -40°C to +105°C temperature range. This ±2.5% accuracy ensures consistent brownout detection across operating conditions without requiring calibration or external components.
Does MXD1813XR41 support manual reset, and how does its debounce function work?
Yes, MXD1813XR41 supports hardware-debounced manual reset via its RESET pin. When the pin is pulled low for ≥1.5μs, the device initiates a 100ms minimum reset timeout period. This internal circuitry filters mechanical switch bounce, eliminating the need for external RC networks or firmware debouncing logic.
What package type and footprint does MXD1813XR41 use, and is it RoHS-compliant?
MXD1813XR41 is supplied in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm with 0.65mm pin pitch. It is RoHS-compliant and available in lead-free form; ordering suffix "+T" denotes lead-free packaging per Maxim's standard designation.
Can MXD1813XR41 operate reliably at very low supply voltages, and down to what level?
Yes, MXD1813XR41 is guaranteed to maintain valid RESET output logic states down to VCC = +1.0V. Its internal circuitry remains functional across the full +1.0V to +5.5V supply range, ensuring deterministic reset assertion even during deep brownout or battery depletion scenarios.
How does the internal pullup resistor in MXD1813XR41 affect system design compared to push-pull alternatives?
The MXD1813XR41 integrates a 5.5kΩ pullup resistor on its open-drain RESET pin, enabling direct connection to bidirectional μP reset inputs (e.g., Motorola 68HC11) without external components. This reduces BOM count, PCB area, and routing complexity versus push-pull variants like MXD1812XR41 that require external pullups for similar interfaces.
MXD1813XR41 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
MXD1813XR41 FAQ
1.How can I place an order for MXD1813XR41 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1813XR41 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 MXD1813XR41 reliable?
The price and inventory of MXD1813XR41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1813XR41 is usually 5 days.
3.What payment methods are accepted for MXD1813XR41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1813XR41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1813XR41?
MXD1813XR41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1813XR41 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 MXD1813XR41?
For technical support, including MXD1813XR41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1813XR41 requirements.
6.How does Aetrix verify that MXD1813XR41 is sourced from the original manufacturer or authorized distributors?
All MXD1813XR41 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 MXD1813XR41 meets industry standards.
7.What is the process for return or replacement of MXD1813XR41?
All MXD1813XR41 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1813XR41, 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 MXD1813XR41 part is unused and in its original packaging.
Return procedure for MXD1813XR41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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