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Analog Devices Inc./Maxim Integrated MXD1817XR23
- Part No.:
- MXD1817XR23
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR23.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MXD1817XR23 from Maxim Integrated is a precision low-power microprocessor reset supervisor IC designed for +2.5V/+3.0V/+3.3V digital systems. It features an active-high push-pull RESET output, factory-set 2.31V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, guaranteed operation down to VCC = +1V, and 4μA supply current - enabling reliable power-on/brownout reset in portable and industrial embedded controllers.
For engineers reviewing the MXD1817XR23 datasheet, MXD1817XR23 pinout, MXD1817XR23 application, or MXD1817XR23 equivalent, key selection considerations include its active-high push-pull output configuration, SC70-3 package footprint, 2.31V threshold suitability for 2.5V/3.3V rails, manual-reset compatibility (not supported), and absence of internal pullup - distinguishing it from open-drain variants like MXD1816XR23.
Technical Context
The MXD1817XR23 implements a precision bandgap-based voltage monitor with hysteresis-free comparator architecture, asserting RESET when VCC falls below 2.31V and holding it active for ≥100ms after VCC rises above threshold. Its push-pull output drives high during reset assertion, eliminating need for external pullup resistors and ensuring deterministic logic levels across full operating range (-40°C to +105°C).
Unlike MXD1813/MXD1818, it lacks manual-reset debounce circuitry and does not respond to external low pulses on RESET; unlike MXD1816XR23, it provides no open-drain flexibility or internal pullup. Its 4μA quiescent current and VCC = +1V valid RESET guarantee support battery-backed and ultra-low-power applications where supply collapse behavior must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V ±2.5% - precisely monitors 2.5V/3.3V rails without external calibration |
| Reset Timeout Period | 100ms min - ensures μP completes full power-up initialization before release |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | +1.0V to +5.5V - guarantees valid RESET output even during deep brownout |
| Output Type | Active-high push-pull - drives RESET high during fault; no external pullup required |
| Temperature Range | -40°C to +105°C - qualified for industrial and automotive under-hood environments |
| Package | 3-pin SC70 - 2.0 × 2.1 × 0.9mm footprint saves PCB space vs. SOT23 |
Pinout & Package
MXD1817XR23 is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), optimized for high-density layouts. Pin 1 is RESET (active-high push-pull output), Pin 2 is VCC (supply input and threshold monitor node), and Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output - asserts high during reset; sinks 10mA when low, sources 350μA when high |
| 2 | VCC | Power supply input and reset threshold reference - monitors rail directly; operates down to +1.0V |
| 3 | GND | Ground reference - forms return path for internal comparator and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.31V threshold | ±2.5% accuracy over -40°C to +105°C ensures consistent reset point across thermal extremes |
| 100ms fixed reset timeout | Guaranteed minimum delay prevents premature μP release during slow-ramp power-up |
| Active-high push-pull output | Eliminates external pullup resistor and associated BOM cost, leakage, and layout complexity |
| 4μA supply current | Enables use in always-on battery-powered systems without compromising runtime |
| VCC = +1V RESET validity | Maintains defined logic state through deep undervoltage, preventing metastability in downstream logic |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing in DIN-rail mounted programmable logic controllers with 3.3V I/O and 2.5V core rails. IC Role / Device Role / Timing Role: Primary supervisor ensuring CPU and FPGA initialize only after stable 3.3V/2.5V supplies are established. Use Value: 2.31V threshold matches 2.5V rail tolerance; 100ms timeout accommodates slow industrial power supplies; SC70 footprint conserves limited PCB area. |
Use Scenario: Battery-operated ECG and pulse oximeter units requiring multi-year shelf life and cold-temperature reliability. IC Role / Device Role / Timing Role: Brownout detector that holds system in reset during battery sag below 2.5V, preventing corrupted memory writes. Use Value: 4μA quiescent current extends battery life; -40°C to +105°C rating supports field deployment in uncontrolled environments. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade electricity meters with dual-supply (3.3V MCU + 2.5V ADC) and tamper-detection circuitry. IC Role / Device Role / Timing Role: Single-point reset generator synchronizing startup of metering SoC and secure element after AC/DC conversion stabilizes. Use Value: Precision 2.31V threshold avoids false resets during line transients; push-pull output interfaces directly with CMOS inputs without pullup. |
Use Scenario: Under-hood body control modules powered from 12V-to-3.3V DC/DC converters subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Critical reset monitor for microcontroller supervising door locks, lighting, and HVAC subsystems. Use Value: Guaranteed operation to +105°C ambient and VCC = +1V ensures reset integrity during extreme thermal stress and battery voltage collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MXD1817UR23 | SOT23-3 package (vs. SC70); identical electrical specs, timing, and threshold | Requires larger PCB footprint; preferred where SOT23 is standard or reflow profile favors larger pad geometry | Select MXD1817UR23 if board layout uses SOT23 footprints or requires higher thermal mass for soldering robustness. |
| MAX6326XR23 | Same 2.31V threshold and push-pull output, but 14μA supply current and -40°C to +85°C rating | Limited temperature range and higher ICC reduce suitability for extended industrial or automotive under-hood use | Choose MAX6326XR23 only for cost-sensitive commercial applications where 85°C max ambient suffices and 10μA extra current is acceptable. |
Compared with MXD1817XR23, MXD1817UR23 offers identical functionality in a larger SOT23 package - beneficial for hand-soldering or thermal management - while MAX6326XR23 trades off temperature range and quiescent current for legacy compatibility, making MXD1817XR23 the optimal choice for space-constrained, wide-temperature, ultra-low-power designs.
Availability
MXD1817XR23 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, automotive body control modules, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1817XR23 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–MXD1818 family was engineered to deliver precision, low-power, and space-efficient reset supervision for microprocessor-based systems operating across harsh environmental conditions and diverse supply voltages.
FAQ
What is the reset threshold voltage of the MXD1817XR23?
The MXD1817XR23 has a factory-trimmed reset threshold of 2.31V, with ±2.5% accuracy over the full operating temperature range of -40°C to +105°C. This value is confirmed in the Electrical Characteristics table under "MXD181_ _ R23" entry, and is specifically optimized for reliable monitoring of 2.5V and 3.3V power rails in the MXD1815–MXD1818 series.
Does the MXD1817XR23 support manual reset via the RESET pin?
No, the MXD1817XR23 does not support manual reset detection. Unlike MXD1813/MXD1818 variants, it lacks internal debouncing circuitry and does not assert reset in response to external low pulses on the RESET pin. Its RESET pin functions solely as an active-high push-pull output - not an input - and must not be driven externally.
What package type is used by the MXD1817XR23?
The MXD1817XR23 is supplied in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.9mm. This compact footprint is documented in the Ordering Information and Package Information sections, and is distinct from the SOT23-3 option (MXD1817UR23) which shares identical electrical specifications but uses a larger 2.9mm × 1.6mm body.
Can the MXD1817XR23 operate with supply voltages below 2.31V?
Yes - the MXD1817XR23 guarantees valid RESET output down to VCC = +1.0V, as specified in Absolute Maximum Ratings and Electrical Characteristics. While reset assertion occurs at 2.31V, the device continues to drive the push-pull output correctly even during deep brownout, ensuring downstream logic remains held in reset until full recovery.
How does the MXD1817XR23 differ from the MXD1816XR23?
The MXD1817XR23 features an active-high push-pull RESET output, whereas MXD1816XR23 provides an open-drain active-low output with internal 5.5kΩ pullup. This means MXD1817XR23 drives high during reset (no external components needed), while MXD1816XR23 requires external pullup for high-level signaling and supports bidirectional reset interfaces - a functional distinction confirmed in Pin Descriptions and Functional Diagrams.
MXD1817XR23 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:
- 2.31V
- 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
MXD1817XR23 FAQ
1.How can I place an order for MXD1817XR23 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR23 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 MXD1817XR23 reliable?
The price and inventory of MXD1817XR23 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR23 is usually 5 days.
3.What payment methods are accepted for MXD1817XR23?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR23 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR23?
MXD1817XR23 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR23 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 MXD1817XR23?
For technical support, including MXD1817XR23 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR23 requirements.
6.How does Aetrix verify that MXD1817XR23 is sourced from the original manufacturer or authorized distributors?
All MXD1817XR23 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 MXD1817XR23 meets industry standards.
7.What is the process for return or replacement of MXD1817XR23?
All MXD1817XR23 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR23, 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 MXD1817XR23 part is unused and in its original packaging.
Return procedure for MXD1817XR23:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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