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Analog Devices Inc./Maxim Integrated MXD1817UR26
- Part No.:
- MXD1817UR26
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MXD1817UR26.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
MXD1817UR26 from Maxim Integrated is a low-power microprocessor reset supervisor IC designed for +2.5V/+3.0V/+3.3V digital systems. It provides active-high push-pull RESET output, 2.55V factory-set reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It is used in portable battery-powered equipment to ensure reliable power-on reset and brownout protection.
For engineers reviewing the MXD1817UR26 datasheet, MXD1817UR26 pinout, MXD1817UR26 application, or MXD1817UR26 equivalent, key selection criteria include its active-high push-pull output configuration, precise 2.55V threshold for 2.5V/3.3V supply monitoring, manual-reset immunity (not supported), and SC70/SOT23 package compatibility with space-constrained embedded designs.
Technical Context
The MXD1817UR26 implements a precision voltage comparator with hysteresis to monitor VCC against a trimmed internal reference. Its reset generator enforces a fixed 100ms timeout after VCC rises above the 2.55V threshold, independent of VCC slew rate.
Unlike MXD1813/MXD1818 variants, MXD1817UR26 lacks manual-reset detection circuitry and debouncing logic. Its push-pull output drives high during reset assertion, eliminating need for external pullup resistors and enabling direct interface with μP reset inputs requiring active-high signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V ±2.5% over -40°C to +105°C - ensures reliable reset activation at nominal 2.5V system supply with margin for tolerance and drift |
| Reset Timeout | 100ms minimum - guarantees μP remains held in reset long enough for stable power rail establishment |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in always-on portable instrumentation |
| VCC Operating Range | +1.0V to +5.5V - supports valid reset output even during deep brownout conditions down to 1V |
| Output Type | Active-high push-pull - delivers full-rail logic HIGH during reset, compatible with μPs requiring active-high reset input |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint ideal for compact PCB layouts in handheld devices |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1817UR26 is housed in a 3-pin SOT23 package (U3-1 outline) with 0.95mm pitch, optimized for automated assembly and thermal performance in high-density boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and reset threshold sensing node - must be connected directly to monitored rail with local decoupling |
| 2 | RESET | Active-high push-pull output - drives HIGH during reset assertion; sinks current when deasserted; no external pullup required |
| 3 | GND | Analog and digital ground reference - requires low-impedance connection to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.55V reset threshold | Factory-trimmed ±2.5% accuracy over full temperature range ensures consistent trip point across operating environments |
| Active-high push-pull RESET | Eliminates need for external pullup resistor and simplifies interface with μPs requiring active-high reset initiation |
| 100ms fixed reset timeout | Guaranteed minimum delay prevents premature release before power rails stabilize post-power-up or brownout recovery |
| Low 4μA quiescent current | Enables use in energy-sensitive applications such as coin-cell–powered sensors and wearables without compromising battery life |
| Robust transient immunity | Rejects fast VCC glitches up to 100ns duration at 200mV overdrive, preventing spurious resets in noisy power environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitors and pulse oximeters require reliable power-on initialization and brownout recovery without external components. IC Role / Device Role / Timing Role: MXD1817UR26 acts as a dedicated reset supervisor, asserting active-high RESET until VCC exceeds 2.55V and remains stable for ≥100ms. Use Value: Its 4μA supply current extends single-CR2032 battery life beyond 5 years; 2.55V threshold matches common 2.5V analog front-end rails. | Use Scenario: DIN-rail mounted I/O modules operate in electrically noisy factory environments with fluctuating 3.3V logic supplies. IC Role / Device Role / Timing Role: MXD1817UR26 continuously monitors the 3.3V domain and forces microcontroller reset on undervoltage events. Use Value: ±2.5% threshold accuracy and transient immunity prevent false resets caused by motor switching noise or EMI coupling onto VCC. |
| Smart Home Hub Controllers | Automated Test Equipment (ATE) |
Use Scenario: Wi-Fi-enabled home automation hubs integrate multiple low-voltage rails (2.5V, 3.3V) and demand glitch-free boot sequencing. IC Role / Device Role / Timing Role: MXD1817UR26 supervises the 2.5V core supply, generating a clean active-high reset pulse synchronized to rail stability. Use Value: Push-pull output eliminates timing uncertainty from RC time constants of external pullups, ensuring deterministic reset timing. | Use Scenario: Benchtop ATE systems require guaranteed reset behavior across wide temperature ranges (-40°C to +105°C) during automated calibration cycles. IC Role / Device Role / Timing Role: MXD1817UR26 serves as the primary power-good indicator for FPGA-based control logic, asserting RESET until 2.55V rail settles. Use Value: Guaranteed operation down to VCC = +1V allows valid reset signaling even during controlled power ramp-down tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD29+T | 2.93V reset threshold, open-drain active-low output, same SOT23-3 package | Requires external pullup; incompatible with active-high reset input requirements | Select only if system design accommodates active-low signaling and 2.93V threshold suffices for 3.3V rail margin |
| TPS3808G12QDBVRQ1 | 1.2V threshold, adjustable via external resistor, 200ms timeout, automotive-grade (-40°C to +125°C) | Higher cost, larger footprint (SOT23-6), requires external component for threshold setting | Choose only when programmable threshold or AEC-Q100 qualification is mandatory |
Compared with MAX809TRD29+T and TPS3808G12QDBVRQ1, MXD1817UR26 offers the unique combination of factory-set 2.55V threshold, active-high push-pull output, and ultra-low 4μA supply current in a minimal 3-pin SOT23 package-making it optimal for cost-sensitive, space-constrained 2.5V/3.3V portable designs where external components must be avoided.
Availability
MXD1817UR26 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1817UR26 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 replace discrete reset solutions in space- and power-constrained μP systems, delivering precision voltage monitoring with zero external components in miniature packages.
FAQ
What is the exact reset threshold voltage of MXD1817UR26 and how tightly is it specified?
The MXD1817UR26 has a factory-set reset threshold of 2.55V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +105°C. This specification is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix R26, and ensures reliable activation when monitoring 2.5V or 3.3V power rails with appropriate margin against tolerance and drift. The MXD1817UR26 maintains this precision without requiring calibration or external components.
Does MXD1817UR26 support manual reset functionality via an external pushbutton?
No, MXD1817UR26 does not support manual reset detection. Unlike MXD1813/MXD1818 variants, it lacks debounced manual-reset circuitry and does not respond to external signals applied to the RESET pin. Its reset assertion is solely triggered by VCC falling below the 2.55V threshold. For pushbutton-initiated reset capability, MXD1818UR26 (same threshold, with manual-reset detect) would be the appropriate alternative within the same family.
What output configuration does MXD1817UR26 use, and why does it matter for system design?
MXD1817UR26 features an active-high push-pull RESET output. This means it actively drives the RESET line HIGH during reset assertion and LOW when deasserted-eliminating the need for an external pullup resistor. This configuration simplifies PCB layout, improves noise immunity, and ensures deterministic timing compared to open-drain alternatives, making MXD1817UR26 ideal for interfacing directly with microprocessors that require active-high reset inputs.
Can MXD1817UR26 operate reliably at very low supply voltages, and down to what level?
Yes, MXD1817UR26 is guaranteed to provide valid RESET/RESET output states down to VCC = +1.0V, as stated in the Absolute Maximum Ratings and Electrical Characteristics sections. This capability ensures robust brownout detection and signaling even during deep supply sags, supporting fail-safe behavior in battery-powered systems where voltage may decay gradually. Operation below +1.0V is not characterized or guaranteed for MXD1817UR26.
Which package types are available for MXD1817UR26, and what are their key mechanical attributes?
MXD1817UR26 is offered in the 3-pin SOT23 package (order code U3-1), measuring 2.92mm × 1.3mm with 0.95mm lead pitch. It is also available in the smaller SC70-3 variant (X3-2 outline). Both packages support tape-and-reel delivery in 2500-unit increments and are qualified for reflow soldering per JEDEC standards. The SOT23 version provides better thermal dissipation and is preferred for higher ambient temperature applications, while SC70 suits ultra-compact layouts.
MXD1817UR26 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.55V
- 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:
- SOT-23-3
MXD1817UR26 FAQ
1.How can I place an order for MXD1817UR26 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817UR26 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 MXD1817UR26 reliable?
The price and inventory of MXD1817UR26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817UR26 is usually 5 days.
3.What payment methods are accepted for MXD1817UR26?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817UR26 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817UR26?
MXD1817UR26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817UR26 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 MXD1817UR26?
For technical support, including MXD1817UR26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817UR26 requirements.
6.How does Aetrix verify that MXD1817UR26 is sourced from the original manufacturer or authorized distributors?
All MXD1817UR26 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 MXD1817UR26 meets industry standards.
7.What is the process for return or replacement of MXD1817UR26?
All MXD1817UR26 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817UR26, 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 MXD1817UR26 part is unused and in its original packaging.
Return procedure for MXD1817UR26:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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