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Analog Devices Inc./Maxim Integrated MXD1817XR26+
- Part No.:
- MXD1817XR26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR26+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,474
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Product details
Overview
MXD1817XR26+ from Maxim Integrated is a precision active-high push-pull μP reset supervisor IC for +2.5V/+3.0V/+3.3V systems, featuring a factory-trimmed 2.55V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It monitors supply voltage integrity and asserts RESET high during brownout, power-up, and power-down events in portable microcontroller-based equipment.
For engineers reviewing the MXD1817XR26+ datasheet, MXD1817XR26+ pinout, MXD1817XR26+ application, or MXD1817XR26+ equivalent, key selection criteria include its active-high push-pull output drive capability, SC70-3 package footprint, low 4μA quiescent current, and compatibility with battery-powered embedded systems requiring deterministic reset behavior under transient supply conditions.
Technical Context
The MXD1817XR26+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.55V, triggering an internal timer that holds RESET high for ≥100ms after VCC recovers above threshold. Its push-pull output delivers 350μA source current and sinks 10mA at 0.4V, eliminating need for external pullup resistors.
Designed for BiCMOS process, it achieves ±2.5% reset threshold accuracy across –40°C to +105°C and rejects fast transients via built-in immunity circuitry-guaranteeing valid RESET assertion even when VCC drops as low as +1V, ensuring robust boot sequencing in low-voltage microcontroller applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V (factory-set R26 suffix), ±2.5% accuracy over –40°C to +105°C - ensures precise brownout detection for 2.5V/3.0V/3.3V rails |
| Reset Timeout Period | 100ms minimum (tRP) - guarantees sufficient hold time for μP initialization before release |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable instrumentation |
| Output Type | Active-high push-pull - drives RESET directly without external components; compatible with CMOS inputs |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion down to near-dead-battery conditions |
| Package | 3-pin SC70 (X3-2 outline) - 2.0mm × 2.1mm footprint ideal for space-constrained PCBs |
| Temperature Range | –40°C to +105°C - qualified for industrial and extended-temperature embedded environments |
Pinout & Package
MXD1817XR26+ is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with pin 1 = RESET (active-high push-pull output), pin 2 = VCC (supply and threshold monitor input), and pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; transitions high when VCC falls below 2.55V and remains high ≥100ms after VCC recovery |
| 2 | VCC | Power supply input and reset threshold reference; monitored continuously for brownout detection |
| 3 | GND | Analog and digital ground reference; must be low-impedance connection for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.55V (R26 suffix) with ±2.5% tolerance over full temperature range - eliminates calibration overhead |
| No external components required | Self-contained reset generator with integrated comparator, timer, and push-pull driver - reduces BOM count and layout area |
| Low-power operation | 4μA typical ICC at +3.6V - extends battery runtime in portable medical and IoT edge devices |
| VCC monitoring down to +1V | Guaranteed RESET validity at VCC = +1V - ensures reliable boot sequencing even during deep discharge |
| Transient immunity | Rejects fast negative-going VCC glitches per Typical Operating Characteristics graph toc05 - prevents spurious resets |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter operating on single-cell Li-ion (2.7–4.2V) with strict boot reliability requirements. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET during brownout to prevent corrupted firmware execution on cold start. Use Value: 2.55V threshold aligns with end-of-discharge voltage of Li-ion cells; 100ms timeout ensures full μC initialization before peripheral enable. |
Use Scenario: DIN-rail mounted programmable logic controller module exposed to 24VDC supply ripple and thermal cycling. IC Role / Device Role / Timing Role: Primary reset source for ARM Cortex-M7 host processor, monitoring regulated +3.3V rail derived from switching supply. Use Value: –40°C to +105°C rating and ±2.5% threshold stability ensure deterministic reset timing across harsh factory environments. |
| Smart Home Hub Controllers | Automotive Infotainment Subsystems |
|
Use Scenario: Wi-Fi-enabled home automation hub powered by USB-C PD (5V→3.3V LDO) with intermittent power loss during firmware updates. IC Role / Device Role / Timing Role: Supervisory IC generating clean, glitch-free active-high reset signal to recover μC from partial power collapse. Use Value: Push-pull output eliminates external pullup, reducing component count; 4μA ICC minimizes standby drain on backup capacitor. |
Use Scenario: Display cluster sub-module receiving +3.3V from vehicle body-control unit, subject to load-dump transients and cold-crank voltage sag. IC Role / Device Role / Timing Role: Reset monitor for infotainment SoC, asserting RESET during VCC dip below 2.55V to prevent memory corruption. Use Value: Immunity to short-duration transients (per toc05) avoids false triggers during engine cranking; SC70 package fits tight dashboard PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | Active-low open-drain output; 2.93V reset threshold; requires external pullup resistor | Compatible with bidirectional μP reset pins (e.g., legacy 8051), but not direct replacement due to polarity and drive architecture | Select only if system requires active-low signaling or interfaces with processors mandating open-drain reset inputs |
| TPS3808G125DBVR | Adjustable reset threshold (via external resistor divider); 1.25V reference; 200ms default timeout | Supports custom voltage monitoring (e.g., 1.8V core rails), but adds two passive components and increases layout area | Choose when flexibility in threshold setting outweighs BOM simplicity and SC70 footprint constraints |
Compared with MAX809TRD2+T and TPS3808G125DBVR, MXD1817XR26+ offers fixed 2.55V detection with zero external components and active-high push-pull drive-making it optimal for cost-sensitive, space-constrained 3.3V embedded designs where deterministic reset polarity and minimal quiescent current are critical.
Availability
MXD1817XR26+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart home hub controllers, automotive infotainment subsystems, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MXD1817XR26+ 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 ultra-low-power, precision reset supervision for microprocessor and microcontroller systems operating on 2.5V/3.0V/3.3V and 5V supplies-with emphasis on small footprint, high accuracy, and transient immunity.
FAQ
What is the reset threshold voltage of the MXD1817XR26+?
The MXD1817XR26+ has a factory-trimmed reset threshold of 2.55V (R26 suffix), with guaranteed ±2.5% accuracy over the full –40°C to +105°C operating temperature range. This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for MXD181__ R26 entries, and applies specifically to the MXD1817XR26+ variant within the MXD1815–MXD1818 subfamily for 2.5V/3.0V/3.3V systems.
Does the MXD1817XR26+ require external components to function?
No, the MXD1817XR26+ operates autonomously with no external components required. Its active-high push-pull RESET output eliminates the need for pullup resistors, and its internal voltage reference, comparator, and timer are fully integrated. The device only requires connections to VCC, GND, and the target microprocessor's reset input-making it ideal for minimalist, high-reliability designs where board space and BOM count are constrained.
What is the reset timeout duration for the MXD1817XR26+?
The MXD1817XR26+ provides a fixed minimum reset timeout period of 100ms (tRP) after VCC rises above the 2.55V threshold. This value is guaranteed across temperature and supply voltage, with typical values reaching up to 250ms. The timeout ensures sufficient hold time for microprocessor initialization before releasing the active-high RESET signal-critical for reliable boot sequencing in embedded systems.
Is the MXD1817XR26+ compatible with 5V systems?
No, the MXD1817XR26+ is specified for +2.5V/+3.0V/+3.3V systems only, as indicated by its R26 reset threshold (2.55V) and placement in the MXD1815–MXD1818 subfamily. While its absolute maximum VCC rating is +5.5V, its reset threshold is optimized for lower-voltage rails. For 5V applications, use MXD1810–MXD1813 variants (e.g., MXD1810XR46+) with thresholds of 4.12V–4.62V.
What package type does the MXD1817XR26+ use?
The MXD1817XR26+ uses a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm with 0.65mm pitch. This compact, surface-mount package is RoHS-compliant (indicated by the "+" suffix) and optimized for high-density PCB layouts in portable and space-constrained electronics-distinct from the SOT23 option used in UR-suffixed variants like MXD1817UR26+.
MXD1817XR26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- SC-70-3
MXD1817XR26+ FAQ
1.How can I place an order for MXD1817XR26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR26+ 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 MXD1817XR26+ reliable?
The price and inventory of MXD1817XR26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR26+ is usually 5 days.
3.What payment methods are accepted for MXD1817XR26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR26+?
MXD1817XR26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR26+ 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 MXD1817XR26+?
For technical support, including MXD1817XR26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR26+ requirements.
6.How does Aetrix verify that MXD1817XR26+ is sourced from the original manufacturer or authorized distributors?
All MXD1817XR26+ 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 MXD1817XR26+ meets industry standards.
7.What is the process for return or replacement of MXD1817XR26+?
All MXD1817XR26+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR26+, 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 MXD1817XR26+ part is unused and in its original packaging.
Return procedure for MXD1817XR26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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