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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 MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
MXD1817XR26 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 ±2.5% factory-trimmed reset threshold, 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. Used in portable battery-powered equipment to ensure reliable μP initialization during power-up, brownout, and manual reset events.
For engineers reviewing the MXD1817XR26 datasheet, MXD1817XR26 pinout, MXD1817XR26 application, or MXD1817XR26 equivalent, key selection considerations include its SC70-3 package, active-high reset logic, manual-reset compatibility (not supported), and precise 2.55V threshold for 2.5V/3.3V rail monitoring - critical for embedded controllers and intelligent instruments requiring stable power sequencing.
Technical Context
The MXD1817XR26 implements a precision voltage comparator with internal reference to monitor VCC against a fixed 2.55V threshold. When VCC falls below this level, it asserts RESET high within 5μs and holds it for ≥100ms after VCC recovers. Its push-pull output drives directly into CMOS inputs without external pullup, supporting clean reset signaling in space-constrained designs.
Unlike MXD1813/MXD1818 variants, MXD1817XR26 lacks manual-reset debounce circuitry and open-drain configuration - it is strictly a VCC-monitored, active-high reset generator. Its BiCMOS process enables 4μA typical supply current and immunity to fast transients up to 100μs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V ±2.5% - precisely monitors 2.5V/3.3V rails; ensures reset assertion before logic corruption |
| Reset Timeout Period | 100ms min - guarantees sufficient hold time for μP core and peripherals to stabilize post-power-up |
| Supply Current | 4μA typ at +3.6V - enables multi-year battery life in portable instrumentation and IoT edge nodes |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET output even during deep brownout down to 1V VCC |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor; drives CMOS inputs directly |
| Package | 3-pin SC70 - 2.0 × 1.25 × 0.9mm footprint ideal for compact PCB layouts in handheld devices |
| Temperature Range | −40°C to +105°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
MXD1817XR26 is housed in a 3-pin SC70 package (outline X3-2), with pin 1 = RESET (active-high push-pull), pin 2 = VCC (supply and threshold input), pin 3 = GND. The small-outline, surface-mount construction supports automated assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; drives high during reset condition; sinks/source up to 10mA; no external pullup needed |
| 2 | VCC | Power supply input and reset threshold reference point; monitored continuously for brownout detection |
| 3 | GND | Ground reference for internal comparator and output stage; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.55V reset threshold | ±2.5% accuracy over −40°C to +105°C ensures consistent trip point across temperature and voltage rails |
| 100ms fixed reset timeout | Guaranteed minimum delay prevents premature μP release before power stabilization and clock lock |
| Active-high push-pull output | Direct interface to μP reset pins requiring high-active assertion; eliminates BOM cost and layout area of pullup resistor |
| 4μA ultra-low supply current | Enables always-on supervision in battery-backed systems without measurable impact on runtime |
| VCC = +1V operation guarantee | Ensures deterministic reset state even during severe brownout - critical for data integrity in flash write operations |
Applications
| Portable Medical Instruments | Industrial PLC Controllers |
|---|---|
Use Scenario: Handheld glucose meters and portable ECG monitors powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and asserts active-high RESET to ARM Cortex-M0+ MCU during startup and low-battery brownout. Use Value: 2.55V threshold aligns with 3.3V LDO dropout margin; 100ms timeout ensures ADC calibration completes before firmware execution. |
Use Scenario: DIN-rail mounted programmable logic controllers operating in factory-floor environments with noisy 24V DC supplies. IC Role / Device Role / Timing Role: Monitors isolated 3.3V logic rail derived from switching converter; triggers reset on line transients exceeding 100μs duration. Use Value: Transient immunity prevents spurious resets from motor drive noise; SC70 package withstands thermal cycling in unventilated enclosures. |
| Smart Energy Meters | Networked Point-of-Sale Terminals |
Use Scenario: ANSI C12.20-compliant electricity meters with dual-supply architecture (3.3V logic + 1.8V RF). IC Role / Device Role / Timing Role: Resets metering SoC upon 3.3V rail collapse caused by capacitor aging or surge events on AC input. Use Value: Guaranteed operation down to VCC = +1V ensures reset remains valid during slow discharge of bulk capacitors after AC loss. |
Use Scenario: PCI PTS v6-certified payment terminals using 2.5V I/O banks and secure element co-processors. IC Role / Device Role / Timing Role: Provides synchronized reset to main application processor and cryptographic module during cold boot and watchdog recovery. Use Value: Active-high push-pull output eliminates timing skew between parallel reset paths; 4μA quiescent current extends backup battery life during offline mode. |
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, SOT23-3, 14μA ICC, no manual reset | Higher threshold unsuitable for 2.5V systems; better for 3.3V-only designs with tighter tolerance | Select when 2.93V trip point matches system LDO dropout specification and SOT23 footprint is preferred |
| TPS3808G125DBVR | 1.25V adjustable threshold via external resistor divider, 1.6μA ICC, 200ms timeout, SOT23-6 | Requires two external resistors; longer timeout may delay system recovery; larger package | Choose only if programmable threshold is mandatory and board space allows 6-pin SOT23 |
Compared with MXD1817XR26, MAX809TRD29+T offers higher threshold but higher supply current and less precision, while TPS3808G125DBVR trades fixed simplicity for flexibility at the cost of BOM count, layout area, and timeout timing - making MXD1817XR26 optimal for cost-sensitive, space-constrained 2.5V/3.3V systems needing guaranteed 2.55V detection.
Availability
MXD1817XR26 is available at Aetrix Electronics and suitable for portable medical instruments, industrial PLC controllers, smart energy meters, networked point-of-sale terminals, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
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 analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was designed specifically for low-power, high-accuracy microprocessor reset supervision in space-constrained, battery-operated, and thermally demanding embedded systems - emphasizing precision threshold stability, minimal external components, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MXD1817XR26?
The MXD1817XR26 has a factory-set reset threshold of 2.55V, with ±2.5% accuracy over the full −40°C to +105°C operating temperature range. This value is confirmed in the Electrical Characteristics table under "MXD181_ _ R26" row, where VTH is specified as 2.47V (min), 2.55V (typ), and 2.64V (max). It is optimized for reliable supervision of 2.5V and 3.3V power rails.
Does MXD1817XR26 support manual reset functionality?
No, MXD1817XR26 does not support manual reset. Manual-reset debounce is exclusive to MXD1813 and MXD1818 variants (e.g., MXD1818XR26). The MXD1817XR26 is a VCC-only supervisory device with active-high push-pull RESET output and no external RESET pin monitoring capability - its reset assertion is triggered solely by VCC falling below 2.55V.
What package type and pin configuration does MXD1817XR26 use?
MXD1817XR26 uses the 3-pin SC70 package (outline X3-2), with top-mark "AIL". Pin 1 is RESET (active-high push-pull), pin 2 is VCC, and pin 3 is GND. This matches the SC70-3 pinout shown in the "Pin Descriptions" section of the datasheet and is distinct from the SOT23-3 variant (MXD1817UR26).
Can MXD1817XR26 operate reliably at VCC = +1.0V?
Yes, MXD1817XR26 is guaranteed to provide valid RESET/RESET output down to VCC = +1.0V, as stated in both the General Description and Absolute Maximum Ratings sections. This ensures deterministic reset behavior during deep brownout conditions - critical for preserving data integrity in flash memory writes and real-time control loops.
How does the reset timeout period behave across temperature for MXD1817XR26?
The active reset timeout period (tRP) for MXD1817XR26 is specified as 100ms (min), 150ms (typ), and 250ms (max) over −40°C to +105°C. Typical Operating Characteristics graph "RESET TIMEOUT PERIOD vs. TEMPERATURE" shows <±5% variation across temperature, confirming stable timing performance without external timing components.
MXD1817XR26 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 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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MIC826SYMT-TR
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