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Analog Devices Inc./Maxim Integrated MXD1817XR26+T
- Part No.:
- MXD1817XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MXD1817XR26+T from Maxim Integrated is a precision microprocessor reset supervisor IC with active-high push-pull RESET output, factory-set 2.55V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and operation down to VCC = +1V. It monitors +2.5V/+3.0V/+3.3V power supplies in portable embedded systems and asserts reset during brownout, power-up, and power-down events.
For engineers reviewing the MXD1817XR26+T datasheet, MXD1817XR26+T pinout, MXD1817XR26+T application, or MXD1817XR26+T equivalent, this device delivers guaranteed logic-state validity at low supply voltage, transient-immune monitoring, and space-constrained SC70-3 packaging for battery-powered μP systems requiring reliable power-on reset sequencing.
Technical Context
The MXD1817XR26+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.55V, triggering an active-high RESET signal. Its internal timer guarantees ≥100ms assertion after VCC rises above threshold, independent of VCC slew rate.
This device belongs to the MXD1815–MXD1818 subfamily for 2.5V/3.0V/3.3V systems and uses BiCMOS process technology. It features no external components, 4μA typical supply current at +3.6V, and operates across –40°C to +105°C with guaranteed functionality down to VCC = +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V ±2.5% over –40°C to +105°C - ensures accurate brownout detection for +2.5V/+3.3V rails |
| Reset Timeout Period | 100ms min - guarantees sufficient μP initialization time after power recovery |
| Supply Current | 4μA typ at +3.6V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET assertion even during deep brownout |
| Output Type | Active-high push-pull - drives μP reset pin directly without external pullup/pulldown |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for space-constrained PCBs |
| Temperature Range | –40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1817XR26+T is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208) with 0.65mm pitch, optimized for high-density portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Active-high push-pull output - drives high during reset; sinks current when deasserted |
| 2 (SC70) | VCC | Power supply input and reset threshold monitor node - powers internal circuitry and sets comparator reference |
| 3 (SC70) | GND | Analog/digital ground reference - must be connected to system ground plane for stable threshold accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.55V with ±2.5% tolerance over full temperature range - eliminates calibration and improves system reliability |
| No external components required | Self-contained reset generator - reduces BOM count, PCB area, and design validation effort |
| Low-power operation | 4μA typical ICC at +3.6V - extends battery runtime in handheld and IoT edge devices |
| VCC = +1V functional guarantee | RESET remains valid down to 1.0V supply - prevents spurious release during deep undervoltage conditions |
| Transient immunity | Rejects fast VCC glitches per Typical Operating Characteristics graph toc05 - avoids false resets in noisy environments |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG and pulse oximeter units operating on single-cell Li-ion or alkaline supplies. IC Role / Device Role / Timing Role: Supervises +3.3V system rail and asserts active-high RESET to ARM Cortex-M microcontroller during startup and brownout. Use Value: Ensures deterministic boot sequence and prevents firmware corruption when supply dips below 2.55V during wireless transmission bursts. |
Use Scenario: DIN-rail mounted programmable logic controller modules exposed to wide ambient temperature swings and electrical noise. IC Role / Device Role / Timing Role: Monitors isolated +3.3V logic supply and triggers hard reset of FPGA-based control core upon undervoltage. Use Value: Guarantees 100ms minimum reset hold time for FPGA configuration integrity and meets IEC 61000-4-4 surge immunity requirements via glitch rejection. |
| Smart Home Hub Controllers | Automotive Infotainment Telematics |
Use Scenario: Always-on Wi-Fi/BLE gateway devices powered by USB-C PD or wall adapters with variable output regulation. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for dual-core application processor running Linux-based middleware. Use Value: Prevents kernel panic during adapter hot-plug events by asserting RESET until stable +3.3V is confirmed for ≥100ms. |
Use Scenario: In-vehicle telematics control units sharing 12V-to-3.3V DC/DC with infotainment head unit under load dump conditions. IC Role / Device Role / Timing Role: Resets automotive-grade microcontroller (e.g., S32K144) when 3.3V rail sags below 2.55V during alternator transients. Use Value: Maintains functional safety by ensuring MCU reinitialization before CAN bus communication resumes, meeting ASIL-B timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.93V reset threshold, SOT23-3, 1.2μA max ICC, no manual reset | Higher threshold unsuitable for +2.5V systems; lower quiescent current benefits ultra-low-power sleep modes | Select when system rail is ≥+3.0V and sub-2μA supply current is critical |
| TPS3808G125DBVR | 1.25V threshold, SOT23-6, adjustable delay, 1.1μA ICC, open-drain output | Requires external pullup and resistor divider; supports programmable timeout but lacks push-pull drive | Choose for flexible threshold tuning and longer delays, accepting added BOM complexity |
Compared with MXD1817XR26+T, MAX809TRD2+T offers lower power but mismatches the 2.55V requirement for +2.5V systems, while TPS3808G125DBVR provides configurability at the cost of pin count, external components, and active-high push-pull simplicity.
Availability
MXD1817XR26+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart home hub controllers, and automotive infotainment telematics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1817XR26+T 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 MXD1815–MXD1818 product line was designed specifically for low-voltage microprocessor reset supervision in space-constrained, battery-operated, and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of MXD1817XR26+T and how tightly is it specified?
The MXD1817XR26+T has a factory-trimmed reset threshold of 2.55V, with a guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +105°C. This specification is validated per the Electrical Characteristics table in the official Maxim datasheet, where VTH for R26 suffix is listed as 2.47V (min), 2.55V (typ), and 2.64V (max). The tight tolerance ensures consistent brownout detection across diverse environmental conditions without external calibration.
Does MXD1817XR26+T support manual reset functionality via an external pushbutton?
No, MXD1817XR26+T does not include manual reset detection. That feature is exclusive to the MXD1813/MXD1818 variants, which incorporate debounced push-button sensing on the RESET pin. MXD1817XR26+T is a dedicated power-supply monitor with active-high push-pull RESET output and no external trigger capability - its reset assertion is solely governed by VCC crossing the 2.55V threshold.
What is the maximum supply voltage the MXD1817XR26+T can withstand on the VCC pin?
The MXD1817XR26+T has an absolute maximum VCC rating of +6.0V, as stated in the Absolute Maximum Ratings section. However, its functional operating range is specified from +1.0V to +5.5V. Operation above +5.5V may cause permanent damage or unpredictable behavior, and the device is not characterized or guaranteed beyond that limit. For robust design, VCC should be maintained within 1.0V–5.5V during normal operation.
Can MXD1817XR26+T drive a standard CMOS microcontroller reset input directly?
Yes, MXD1817XR26+T can drive a standard CMOS microcontroller reset input directly. Its active-high push-pull RESET output delivers up to 350μA source current when asserted and sinks up to 10mA when deasserted, fully compatible with typical μP reset pin input leakage and capacitance requirements. No external pullup or pulldown resistors are needed, simplifying interface design and reducing component count.
Is MXD1817XR26+T available in lead-free packaging and what does the "+T" suffix indicate?
Yes, MXD1817XR26+T is lead(Pb)-free compliant. The "+T" suffix explicitly denotes RoHS-compliant, lead-free packaging per Maxim Integrated's ordering convention - replacing the legacy "-T" (leaded) variant. This designation confirms compliance with EU RoHS Directive 2011/65/EU and ensures compatibility with modern Pb-free reflow soldering processes without compromising thermal or electrical performance.
MXD1817XR26+T 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+T FAQ
1.How can I place an order for MXD1817XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR26+T 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+T reliable?
The price and inventory of MXD1817XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR26+T is usually 5 days.
3.What payment methods are accepted for MXD1817XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR26+T?
MXD1817XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR26+T 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+T?
For technical support, including MXD1817XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR26+T requirements.
6.How does Aetrix verify that MXD1817XR26+T is sourced from the original manufacturer or authorized distributors?
All MXD1817XR26+T 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+T meets industry standards.
7.What is the process for return or replacement of MXD1817XR26+T?
All MXD1817XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR26+T, 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+T part is unused and in its original packaging.
Return procedure for MXD1817XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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