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Analog Devices Inc./Maxim Integrated MXD1817UR22
- Part No.:
- MXD1817UR22
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MXD1817UR22.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,502
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Product details
Overview
MXD1817UR22 from Maxim Integrated is a precision microprocessor reset supervisor IC designed for +2.5V/+3.0V/+3.3V digital systems. It provides active-high push-pull RESET output, 2.18V factory-set reset threshold with ±2.5% accuracy over temperature, 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It is used in portable battery-powered controllers to ensure reliable power-on initialization and brownout recovery.
For engineers reviewing the MXD1817UR22 datasheet, MXD1817UR22 pinout, MXD1817UR22 application, or MXD1817UR22 equivalent, key selection criteria include its active-high push-pull output configuration, 2.18V threshold for low-voltage 3.3V/2.5V rails, manual-reset compatibility (not supported), and SOT23-3 package footprint compatibility with legacy DS181x designs.
Technical Context
The MXD1817UR22 implements a precision bandgap-based voltage comparator monitoring VCC against a factory-trimmed 2.18V threshold, with internal hysteresis and transient immunity up to 1.5µs at 200mV overdrive. Its reset generator enforces a fixed 100ms timeout after VCC rises above threshold, independent of temperature or supply variation.
Unlike MXD1813/MXD1818 variants, MXD1817UR22 lacks manual-reset debounce circuitry and open-drain capability - it delivers only active-high push-pull RESET, eliminating external pullup requirements while ensuring fast, rail-to-rail logic transitions into CMOS inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.18V ±2.5% over -40°C to +105°C - ensures reliable assertion before 2.5V system brownout |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP core and peripheral initialization |
| Supply Current | 4µA typical at +3.6V - enables multi-year battery life in always-on portable instrumentation |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET assertion even during deep brownout down to 1V |
| Output Type | Active-high push-pull - drives high without external components; sinks 10mA when asserted |
| Package | SOT23-3 - industry-standard 3-pin footprint compatible with DS181x family PCB layouts |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded control environments |
Pinout & Package
MXD1817UR22 is housed in a 3-pin SOT23 package (JEDEC TO-236AB), with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads. Pin 1 is RESET (active-high push-pull), Pin 2 is VCC (supply input and threshold monitor), and Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; drives high when VCC ≥ 2.18V, low when VCC < 2.18V; sinks 10mA, sources 350µA |
| 2 | VCC | Supply input and analog reference for reset threshold comparator; operates from +1.0V to +5.5V |
| 3 | GND | Ground reference for comparator, timer, and output stage; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 2.18V threshold | Enables precise brownout detection for 2.5V/3.3V systems without trimming or external resistors |
| ±2.5% threshold accuracy over temp | Eliminates design margin uncertainty across -40°C to +105°C industrial operating range |
| 100ms fixed reset timeout | Guarantees μP reset hold time meets ARM Cortex-M, PIC, and MSP430 power-up timing requirements |
| 4µA supply current | Reduces quiescent load on coin-cell or energy-harvesting supplies in always-on sensor nodes |
| Push-pull active-high output | Directly interfaces with μP reset pins requiring high-active assertion (e.g., some TI C2000, ST STM32L series) |
Applications
| Industrial Controller Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: PLC I/O modules powered by 3.3V DC-DC converters in factory automation cabinets. IC Role / Device Role / Timing Role: Supervises 3.3V rail and asserts active-high RESET to ARM Cortex-M7 MCU during input voltage sag or hot-swap transients. Use Value: Prevents firmware corruption by holding MCU in reset until 3.3V stabilizes above 2.18V and remains valid for ≥100ms. |
Use Scenario: Handheld glucose meters using single-cell Li-ion (2.8–4.2V) with LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: Monitors regulated 3.3V supply and triggers active-high reset if battery voltage drops below safe operating level. Use Value: Ensures deterministic boot sequence even during rapid battery discharge, avoiding undefined state on power collapse. |
| Smart Energy Metering | IoT Edge Sensor Node |
|
Use Scenario: DIN-rail mounted electricity meters with isolated 3.3V auxiliary supply derived from mains. IC Role / Device Role / Timing Role: Provides brownout reset supervision for dual-core metering SoC during AC line dips or transformer saturation events. Use Value: Maintains data integrity by preventing partial register writes or flash corruption during sub-cycle voltage interruptions. |
Use Scenario: Battery-powered LoRaWAN environmental sensor node with ultra-low-power 3.3V regulator. IC Role / Device Role / Timing Role: Resets ESP32 host MCU when 3.3V rail falls below 2.18V due to cold temperature or aging battery impedance rise. Use Value: Enables autonomous recovery without host firmware intervention, extending field deployment lifetime. |
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, 14µA ICC | Requires external pullup; suited for bidirectional μP reset pins (e.g., older 8051 derivatives) | Select when interfacing with legacy microcontrollers requiring active-low, open-drain reset signaling |
| TPS3808G12DBVR | 1.2V threshold, adjustable via external resistor, 1.6µA ICC, 200ms timeout | Configurable threshold and delay; requires external component for adjustment | Select when system requires programmable reset voltage or longer timeout than 100ms |
Compared with MXD1817UR22, MAX809TRD29+T offers higher threshold and open-drain flexibility but consumes >3× more current and lacks push-pull drive; TPS3808G12DBVR provides ultra-low ICC and adjustability but adds BOM cost and layout complexity - MXD1817UR22 delivers optimal balance of precision, low power, and plug-and-play simplicity for fixed 2.18V 3.3V-system supervision.
Availability
MXD1817UR22 is available at Aetrix Electronics and suitable for industrial controller monitoring, portable medical instrumentation, smart energy metering, and IoT edge sensor node applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1817UR22 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 computing markets.
The MXD1810–MXD1818 family was designed specifically for cost-sensitive, space-constrained microprocessor supervisory applications in portable and industrial equipment, emphasizing zero-external-component operation and wide-temperature reliability.
FAQ
What is the reset output polarity and type of MXD1817UR22?
The MXD1817UR22 features an active-high push-pull RESET output. When VCC is above the 2.18V threshold, RESET is driven high; when VCC falls below threshold, RESET is actively pulled low. This eliminates need for external pullup resistors and ensures fast, strong logic transitions compatible with modern μP reset inputs requiring high-active assertion.
Does MXD1817UR22 support manual reset functionality?
No, MXD1817UR22 does not support manual reset. Unlike MXD1813/MXD1818 variants, it lacks internal debounce circuitry and pushbutton-detect capability. Its RESET pin is output-only; applying external signals to RESET may damage the device or cause undefined behavior. Manual reset must be implemented externally if required.
What is the minimum VCC voltage at which MXD1817UR22 guarantees valid RESET output?
MXD1817UR22 guarantees correct RESET logic state down to VCC = +1.0V. Below this, output drive strength degrades, but the device remains functional through full brownout. For applications requiring valid RESET down to VCC = 0V, a 100kΩ pullup resistor from RESET to VCC is recommended per Maxim's application guidance.
Is MXD1817UR22 pin-compatible with other devices in the MXD181x family?
Yes, all MXD181x devices share identical 3-pin SOT23 and SC70 footprints. MXD1817UR22 is pin-compatible with MXD1810–MXD1813 and MXD1815–MXD1818 variants, enabling drop-in replacement within same package type - however, output polarity (active-high vs. active-low), threshold voltage, and manual-reset capability differ between variants and must be verified per design.
What is the supply current consumption of MXD1817UR22 under typical operating conditions?
MXD1817UR22 draws 4µA typical supply current at +3.6V and room temperature, with maximum 10µA across full temperature and voltage range. This ultra-low quiescent current makes it suitable for battery-powered applications where years of operational life are required without maintenance.
MXD1817UR22 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:
- 2.18V
- 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
MXD1817UR22 FAQ
1.How can I place an order for MXD1817UR22 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817UR22 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 MXD1817UR22 reliable?
The price and inventory of MXD1817UR22 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817UR22 is usually 5 days.
3.What payment methods are accepted for MXD1817UR22?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817UR22 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817UR22?
MXD1817UR22 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817UR22 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 MXD1817UR22?
For technical support, including MXD1817UR22 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817UR22 requirements.
6.How does Aetrix verify that MXD1817UR22 is sourced from the original manufacturer or authorized distributors?
All MXD1817UR22 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 MXD1817UR22 meets industry standards.
7.What is the process for return or replacement of MXD1817UR22?
All MXD1817UR22 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817UR22, 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 MXD1817UR22 part is unused and in its original packaging.
Return procedure for MXD1817UR22:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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