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Analog Devices Inc./Maxim Integrated MXD1810XR44
- Part No.:
- MXD1810XR44
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1810XR44.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MXD1810XR44 from Maxim Integrated is a low-power microprocessor reset supervisor IC for +5V systems, featuring an active-low open-drain RESET output with internal 5.5kΩ pullup resistor, factory-set 4.37V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and operation down to VCC = +1V. It monitors supply voltage integrity and asserts reset during brownout, power-up, and power-down events in embedded controllers and portable equipment.
For engineers reviewing the MXD1810XR44 datasheet, MXD1810XR44 pinout, MXD1810XR44 application, or MXD1810XR44 equivalent, this device supports critical μP reset timing validation, manual-reset debouncing interface design, VCC transient immunity analysis, and low-quiescent-current system supervision in space-constrained SC70-3 layouts.
Technical Context
The MXD1810XR44 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 4.37V, triggering an open-drain active-low RESET assertion. Its internal timer guarantees ≥100ms reset pulse width after VCC recovers above threshold, independent of VCC slew rate.
Unlike push-pull variants, MXD1810XR44 uses open-drain output compatible with bidirectional μP reset pins (e.g., Motorola 68HC11) and requires no external pullup. It lacks manual-reset debounce logic-only MXD1813/MXD1818 support pushbutton-triggered reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.37V ±2.5% over -40°C to +105°C - ensures reliable brownout detection in +5V systems with margin against noise and drift |
| Reset Timeout Period | 100ms minimum - guarantees sufficient reset hold time for μP initialization across all operating conditions |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable equipment without compromising supervision reliability |
| VCC Operating Range | +1.0V to +5.5V - allows valid RESET state assertion even during deep brownout, down to functional logic threshold |
| Output Type | Open-drain active-low with 5.5kΩ internal pullup - eliminates need for external resistor and supports wired-OR reset bus architectures |
| Package | 3-pin SC70 - 2.0mm × 1.25mm footprint ideal for compact PCBs where SOT23 is too large |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1810XR44 is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.9mm, with gull-wing leads and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Active-low open-drain reset output; sinks current when asserted; pulled high internally to VCC via 5.5kΩ resistor |
| 2 (SC70) | VCC | Main supply input and reset-threshold reference source; monitored continuously for undervoltage condition |
| 3 (SC70) | GND | Analog and digital ground reference; must be low-impedance connection to ensure accurate threshold comparison |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | Factory-trimmed 4.37V with ±2.5% accuracy over full temperature range - eliminates calibration and reduces BOM count |
| No external components required | Integrated pullup, comparator, and timer - reduces board area, assembly cost, and failure points in reset circuitry |
| Low supply current | 4μA typical - extends battery runtime in portable instrumentation and handheld devices without sacrificing supervision fidelity |
| VCC transient immunity | Rejects fast negative-going transients ≤10µs at 4.37V overdrive - prevents spurious resets from switching noise or ESD |
| Valid RESET down to VCC = +1V | Guaranteed logic-level output integrity even during severe brownout - ensures deterministic μP behavior before shutdown |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered from unregulated 5V rails subject to load-induced sags and EMI. IC Role / Device Role / Timing Role: Supervises 5V supply and asserts active-low RESET to ARM Cortex-M7 microcontroller until stable voltage is confirmed. Use Value: Prevents firmware corruption during brownout by enforcing 100ms minimum reset hold time, validated across -40°C to +105°C. |
Use Scenario: Battery-powered glucose meter with intermittent LCD backlight activation causing 5V rail droop. IC Role / Device Role / Timing Role: Monitors main 5V supply derived from boost converter; triggers reset if voltage falls below 4.37V for >100ms. Use Value: Ensures safe restart after power recovery with <4μA quiescent current, preserving single-CR2032 battery life beyond 2 years. |
| Set-Top Box Power Management | Network Router Control Plane |
Use Scenario: Consumer STB with multiple voltage rails where 5V main rail powers SoC and memory subsystems. IC Role / Device Role / Timing Role: Provides dedicated 5V supervision with open-drain output tied to SoC's bidirectional reset pin. Use Value: Eliminates need for external pullup resistor while maintaining compatibility with legacy reset protocols and hot-swap sequencing. |
Use Scenario: Enterprise router control board requiring robust reset signaling during PoE power cycling and thermal throttling events. IC Role / Device Role / Timing Role: Acts as primary 5V supervisor feeding reset signal to dual-core MIPS processor and Ethernet PHY controller. Use Value: Delivers guaranteed 100ms reset pulse width independent of VCC ramp rate, ensuring deterministic boot sequence under variable load conditions. |
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 reset threshold, SOT23-3 package, 1.6μA supply current, no internal pullup - requires external 100kΩ pullup | Higher threshold better suited for 5V systems with tighter tolerance; lower IQ benefits ultra-low-power designs | Select when lower quiescent current is prioritized and board layout accommodates external pullup |
| TPS3808G33DBVR | 3.08V reset threshold, SOT23-6 package, adjustable delay, 12μA supply current, push-pull output | Designed for 3.3V systems; offers programmable timeout but consumes >3× more current and occupies larger footprint | Choose only for 3.3V applications requiring configurable delay; not suitable as direct replacement for 5V/4.37V use cases |
Compared with MXD1810XR44, MAX809TRD3-T delivers lower power but demands external component overhead, while TPS3808G33DBVR targets different voltage domains and adds complexity irrelevant to fixed 4.37V +5V supervision - making MXD1810XR44 optimal for cost-sensitive, space-constrained 5V industrial reset needs.
Availability
MXD1810XR44 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, set-top boxes, and network routers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MXD1810XR44 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, mixed-signal, and power management ICs for industrial, automotive, and communications markets, emphasizing high reliability and integration density.
The MXD1810–MXD1818 family was developed specifically for low-power, space-constrained microprocessor reset supervision in 5V and 3.3V embedded systems - delivering factory-trimmed thresholds, minimal external components, and wide-temperature operation.
FAQ
What is the exact reset threshold voltage of the MXD1810XR44 and how tightly is it specified?
The MXD1810XR44 has a factory-set reset threshold of 4.37V, 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 R44, and applies directly to the MXD1810XR44 without derating or adjustment.
Does the MXD1810XR44 support manual reset via an external pushbutton?
No, the MXD1810XR44 does not include manual-reset debounce functionality. That feature is exclusive to MXD1813 and MXD1818 variants. The MXD1810XR44 provides only power-supply monitoring and automatic reset assertion - external pushbutton reset requires additional circuitry or selection of MXD1813XR44/MXD1818XR44.
What is the function of Pin 1 on the MXD1810XR44 SC70 package?
Pin 1 of the MXD1810XR44 in SC70 package is the RESET terminal - an active-low open-drain output with internal 5.5kΩ pullup to VCC. When asserted, it sinks current to GND; when deasserted, it floats high via the internal resistor, enabling wired-OR configurations and compatibility with bidirectional μP reset pins.
Can the MXD1810XR44 operate reliably when VCC drops below 2.0V?
Yes, the MXD1810XR44 is guaranteed to maintain valid RESET logic states down to VCC = +1.0V, as explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics sections. This ensures deterministic reset behavior during deep brownout conditions before system shutdown.
Is the MXD1810XR44 pin-compatible with other devices in the MXD181x family?
The MXD1810XR44 shares identical SC70-3 pinout and footprint with all MXD181x XR-series variants (e.g., MXD1811XR44, MXD1813XR44), but differs electrically: MXD1810XR44 has open-drain active-low output, while MXD1812XR44 offers push-pull active-high, and MXD1813XR44 adds manual-reset debounce - direct substitution requires verification of output type and feature set.
MXD1810XR44 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:
- 4.37V
- 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
MXD1810XR44 FAQ
1.How can I place an order for MXD1810XR44 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1810XR44 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 MXD1810XR44 reliable?
The price and inventory of MXD1810XR44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1810XR44 is usually 5 days.
3.What payment methods are accepted for MXD1810XR44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1810XR44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1810XR44?
MXD1810XR44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1810XR44 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 MXD1810XR44?
For technical support, including MXD1810XR44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1810XR44 requirements.
6.How does Aetrix verify that MXD1810XR44 is sourced from the original manufacturer or authorized distributors?
All MXD1810XR44 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 MXD1810XR44 meets industry standards.
7.What is the process for return or replacement of MXD1810XR44?
All MXD1810XR44 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1810XR44, 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 MXD1810XR44 part is unused and in its original packaging.
Return procedure for MXD1810XR44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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