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Analog Devices Inc./Maxim Integrated MXD1815XR26
- Part No.:
- MXD1815XR26
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1815XR26.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:4,655
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Product details
Overview
MXD1815XR26 from Maxim Integrated is a low-power microprocessor reset supervisor IC designed for +2.5V/+3.0V/+3.3V digital systems. It provides active-low, open-drain RESET output with factory-trimmed 2.55V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, 4μA supply current, and operates across –40°C to +105°C. It monitors VCC and asserts reset during brownout, power-up, and power-down events in portable controllers and embedded μP systems.
For engineers reviewing the MXD1815XR26 datasheet, MXD1815XR26 pinout, MXD1815XR26 application, or MXD1815XR26 equivalent, key selection criteria include its precise 2.55V threshold, SC70-3 open-drain output configuration, manual-reset debounce capability (not applicable to this variant), guaranteed RESET validity down to VCC = +1V, and immunity to fast VCC transients.
Technical Context
The MXD1815XR26 implements a precision bandgap-based voltage comparator that triggers reset when VCC falls below 2.55V (min 2.47V, max 2.64V). Its internal timer ensures reset remains asserted for ≥100ms after VCC rises above threshold, independent of VCC slew rate.
This variant belongs to the MXD1815–MXD1818 subfamily for 2.5V/3.0V/3.3V systems and features open-drain RESET with integrated 5.5kΩ pullup resistor. It lacks manual-reset debounce - that function is exclusive to MXD1813/MXD1818 - and does not support push-button initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V (2.47V–2.64V); precisely monitors 2.5V/3.0V/3.3V rails without external components |
| Reset Timeout Period | 100ms min; ensures μP completes full initialization before release |
| Supply Current | 4μA typ at +3.6V; enables multi-year battery life in portable equipment |
| Operating Voltage Range | +1.2V to +5.5V; guarantees valid RESET output even as VCC drops to +1V |
| Output Type | Open-drain, active-low; interfaces directly with bidirectional μP reset pins (e.g., Motorola 68HC11) without external pullup |
| Temperature Range | –40°C to +105°C; qualified for industrial and extended-temperature embedded applications |
| Transient Immunity | Rejects VCC glitches <10µs wide at 2.55V overdrive; prevents spurious resets in noisy environments |
Pinout & Package
MXD1815XR26 is housed in a 3-pin SC70 package (outline X3-2), footprint-compatible with SOT23 but 30% smaller. The package supports reflow soldering and is available in lead(Pb)-free format (designated by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and reset-threshold monitoring node; accepts +1.2V to +5.5V |
| 2 | RESET | Open-drain, active-low reset output with internal 5.5kΩ pullup to VCC; sinks ≥10mA when asserted |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.55V reset threshold | ±2.5% accuracy over –40°C to +105°C ensures reliable brownout detection on 2.5V/3.3V rails |
| No external components required | Integrates voltage reference, comparator, timer, and pullup resistor - reduces BOM count and PCB area |
| Guaranteed RESET validity to VCC = +1V | Enables deterministic reset behavior during deep brownout, critical for fail-safe μP shutdown |
| 4μA ultra-low supply current | Minimizes quiescent power in always-on monitoring circuits and battery-backed systems |
| SC70-3 space-saving package | 1.25mm × 1.65mm footprint saves >40% board area vs. SOT23-3, ideal for compact portable designs |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Monitoring 3.3V power rail in programmable logic controller (PLC) I/O modules during factory floor voltage fluctuations. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 μP upon VCC drop below 2.55V. Use Value: Prevents corrupted register writes and firmware lockup during 100ms+ brownout events common in industrial power distribution. | Use Scenario: Power sequencing and fault detection in handheld ultrasound probe with Li-ion battery and 2.5V analog front-end. IC Role / Device Role / Timing Role: Reset supervisor ensuring clean μC boot after battery insertion or low-voltage recovery. Use Value: 4μA quiescent current extends single-charge operation by >12 hours; 2.55V threshold aligns with LDO dropout margin. |
| Network Edge Routers | Smart Energy Meters |
Use Scenario: Monitoring auxiliary 3.3V supply feeding FPGA configuration memory and Ethernet PHY in outdoor telecom equipment. IC Role / Device Role / Timing Role: Open-drain RESET output tied to shared reset bus with multiple SoCs and peripherals. Use Value: Internal 5.5kΩ pullup eliminates discrete resistor, reducing component count while maintaining noise-immune reset assertion. | Use Scenario: Detecting AC mains failure and initiating graceful shutdown of metrology ASIC and RF transceiver in DIN-rail meter. IC Role / Device Role / Timing Role: Brownout detector triggering nonvolatile data save and clock hold before VCC collapses below 2.55V. Use Value: 100ms timeout provides sufficient time for EEPROM write completion and RTC backup capacitor charging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR26D3T | Same 2.55V threshold, SOT23-3 package, 14μA ICC, no internal pullup (requires external) | Lacks integrated pullup; requires additional 47kΩ resistor for open-drain interface | Choose if SOT23 footprint is mandatory and external pullup is acceptable |
| TPS3808G33DBVR | 2.93V threshold (not 2.55V), 1.6μA ICC, adjustable delay, no manual reset | Higher threshold unsuitable for 2.5V systems near dropout; lower current benefits ultra-low-power designs | Choose only if 2.93V threshold matches system margin and 1.6μA current is critical |
Compared with MAX809TR26D3T, MXD1815XR26 saves one passive component and fits tighter layouts via SC70; versus TPS3808G33DBVR, it delivers exact 2.55V trip point essential for 2.5V rail monitoring but draws slightly more current.
Availability
MXD1815XR26 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, network edge routers, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1815XR26 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 MXD1815XR26 belongs to the MXD1815–MXD1818 family of low-power μP reset supervisors, engineered specifically for reliable power-monitoring in space-constrained, battery-operated, and industrial-grade 2.5V/3.0V/3.3V systems.
FAQ
What is the exact reset threshold voltage of the MXD1815XR26 and how tightly is it specified?
The MXD1815XR26 has a factory-set nominal reset threshold of 2.55V, with guaranteed limits of 2.47V (minimum) and 2.64V (maximum) over the full –40°C to +105°C operating range. This ±2.5% accuracy ensures consistent brownout detection across temperature and supply variations without calibration.
Does the MXD1815XR26 support manual reset via an external pushbutton?
No, the MXD1815XR26 does not include manual-reset debounce functionality. That feature is exclusive to the MXD1813 and MXD1818 variants. MXD1815XR26 responds only to VCC-supply monitoring and asserts RESET solely based on voltage threshold crossing and the fixed 100ms timeout.
What package type and footprint does the MXD1815XR26 use, and is it RoHS-compliant?
The MXD1815XR26 uses the 3-pin SC70 package (outline X3-2), measuring 1.25mm × 1.65mm. It is available in lead(Pb)-free format, indicated by the "+T" ordering suffix, and complies with RoHS Directive 2011/65/EU.
Can the MXD1815XR26 drive a standard CMOS reset input directly, and what is its output sink capability?
Yes - the MXD1815XR26's open-drain RESET output can directly drive standard CMOS reset inputs. When asserted, it sinks ≥10mA at VOUT = 0.4V (VCC ≥ 2.7V), sufficient to meet most μP reset input low-level requirements without external buffering.
How does the MXD1815XR26 behave when VCC drops below 1.2V, and is reset still valid?
The MXD1815XR26 guarantees correct RESET logic state down to VCC = +1V. Below +1.2V, the device may cease operation, but its RESET output remains valid (low when asserted) until VCC reaches +1V. For operation down to 0V, external pulldown is required - though MXD1815XR26 is not rated for that condition.
MXD1815XR26 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:
- 2.55V
- 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
MXD1815XR26 FAQ
1.How can I place an order for MXD1815XR26 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1815XR26 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 MXD1815XR26 reliable?
The price and inventory of MXD1815XR26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1815XR26 is usually 5 days.
3.What payment methods are accepted for MXD1815XR26?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1815XR26 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1815XR26?
MXD1815XR26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1815XR26 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 MXD1815XR26?
For technical support, including MXD1815XR26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1815XR26 requirements.
6.How does Aetrix verify that MXD1815XR26 is sourced from the original manufacturer or authorized distributors?
All MXD1815XR26 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 MXD1815XR26 meets industry standards.
7.What is the process for return or replacement of MXD1815XR26?
All MXD1815XR26 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1815XR26, 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 MXD1815XR26 part is unused and in its original packaging.
Return procedure for MXD1815XR26:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1815XR26 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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