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Analog Devices Inc./Maxim Integrated MXD1817XR31-T
- Part No.:
- MXD1817XR31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR31-T.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MXD1817XR31-T from Maxim Integrated is a low-power microprocessor reset supervisor IC in SC70-3 package, featuring active-high push-pull RESET output, 3.06V factory-set 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 rails in portable embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MXD1817XR31-T datasheet, MXD1817XR31-T pinout, MXD1817XR31-T application, or MXD1817XR31-T equivalent, key selection criteria include reset polarity (active-high), manual-reset absence (vs. MXD1818), SC70 footprint compatibility, supply current ≤10µA at 3.6V, and guaranteed RESET validity to VCC = +1V without external pullup.
Technical Context
The MXD1817XR31-T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 3.06V, triggering an internal timer that holds RESET high for ≥100ms after VCC recovers. Its push-pull output drives logic-high directly without external components, eliminating need for pullup resistors required by open-drain variants.
Unlike MXD1818R31-T, it lacks manual-reset debounce circuitry and does not respond to external low pulses on RESET; its RESET pin serves only as output. The device uses BiCMOS process for 4µA typical supply current and operates across -40°C to +105°C with transient immunity up to 100µs at 200mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.06V ±2.5% - precisely triggers reset when +3.3V rail sags below safe operating level |
| Reset Timeout | 100ms min - ensures μP completes full power-up initialization before release |
| Supply Current | 4µA typ at 3.6V - enables multi-year battery life in portable equipment |
| Operating Voltage | 1.0V to 5.5V - guarantees valid RESET output even during deep brownout |
| Output Type | Active-high push-pull - drives high without external resistor; sinks 10mA when asserted low |
| Temperature Range | -40°C to +105°C - supports industrial and automotive under-hood environments |
| Package | SC70-3 - 2.0mm × 1.25mm footprint saves PCB space vs. SOT23 |
Pinout & Package
MXD1817XR31-T is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with 0.65mm pitch and exposed pad optional. Pin 1 is RESET (active-high push-pull output), Pin 2 is VCC (supply and threshold monitor input), Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; asserts high during reset condition; no external pullup needed |
| 2 | VCC | Power supply input and reset threshold reference; monitored continuously for brownout detection |
| 3 | GND | Ground reference for comparator and output stage; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.06V threshold | Enables precise reset point for +3.3V systems without calibration or external resistors |
| Active-high push-pull RESET | Directly interfaces with μP reset inputs requiring active-high assertion; eliminates BOM cost of pullup resistor |
| 100ms fixed reset timeout | Guarantees sufficient hold time for slowest μP power-up sequences without external timing components |
| 4µA supply current | Reduces quiescent load on coin-cell or energy-harvesting supplies in always-on monitoring applications |
| VCC = +1V RESET validity | Maintains defined logic state during deep undervoltage, preventing metastability in downstream logic |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Power sequencing in distributed I/O nodes where 3.3V rail may sag during hot-swap or ESD events. IC Role / Device Role / Timing Role: Supervisor IC asserting active-high reset to ARM Cortex-M based controller until 3.3V stabilizes above 3.06V for ≥100ms. Use Value: Prevents firmware lockup during field maintenance; eliminates need for discrete RC reset networks. | Use Scenario: Battery-powered ECG patch requiring guaranteed reset during lithium coin-cell voltage decay from 3.3V to 2.7V. IC Role / Device Role / Timing Role: Reset generator maintaining valid active-high signal down to VCC = +1V, ensuring clean restart before brownout-induced corruption. Use Value: Extends usable battery life by 12–18% versus higher-threshold supervisors; reduces system-level validation effort. |
| POS Terminal Payment Controllers | Smart Home Hub Power Management |
Use Scenario: Dual-rail (3.3V/5V) power domain where 3.3V LDO may transiently dip during 5V-to-3.3V conversion. IC Role / Device Role / Timing Role: Dedicated 3.3V supervisor providing 100ms reset pulse synchronized to VCC recovery edge, independent of 5V rail behavior. Use Value: Eliminates false resets caused by cross-rail coupling; meets PCI PTS 6.0 power-fail immunity requirements. | Use Scenario: Always-on Zigbee/Wi-Fi hub powered by USB-C PD with variable 3.3V output during adapter negotiation. IC Role / Device Role / Timing Role: Reset monitor asserting active-high signal only when 3.3V exceeds 3.06V and remains stable for 100ms, filtering PD negotiation glitches. Use Value: Prevents repeated boot loops during USB-C source negotiation; improves user experience and firmware update reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD33+T | Same 3.06V threshold, SOT23-3 package, but active-low open-drain output requiring external pullup | Suitable where μP accepts active-low reset and board layout already includes 10kΩ pullup | Select when footprint reuse is critical and active-low interface is acceptable |
| TPS3808G33DBVR | 3.3V threshold (3.08V min), 350nA quiescent current, but requires external capacitor for adjustable timeout | Better for ultra-low-power applications where timeout flexibility justifies added component count | Choose when <1µA supply current is mandatory and 100ms timeout can be tuned |
Compared with MXD1817XR31-T, MAX809TRD33+T trades push-pull simplicity for SOT23 compatibility and active-low convention, while TPS3808G33DBVR offers nanoscale power savings at the cost of fixed 100ms timeout and extra BOM line item.
Availability
MXD1817XR31-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensors, POS terminal payment controllers, and smart home hub power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1817XR31-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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications.
The MXD1810–MXD1818 family targets cost-sensitive, space-constrained embedded systems needing reliable, low-power reset supervision for microprocessors operating from 2.5V to 5V rails.
FAQ
What is the reset output polarity and drive capability of MXD1817XR31-T?
The MXD1817XR31-T features an active-high push-pull RESET output. When asserted, RESET is driven high (VOH ≥ VCC – 0.1V at 500μA sink); when deasserted, it is actively pulled low. It sources up to 350μA and sinks up to 10mA, enabling direct connection to most μP reset inputs without external components. This differs from open-drain variants like MXD1816XR31-T.
Does MXD1817XR31-T support manual reset functionality via the RESET pin?
No, MXD1817XR31-T does not support manual reset. Unlike MXD1818XR31-T, it lacks debounced manual-reset detection circuitry. Its RESET pin is output-only; applying an external low signal will not trigger reset. Manual reset capability requires selecting MXD1818XR31-T or equivalent with "R" suffix indicating pushbutton detect feature.
What is the minimum VCC voltage at which MXD1817XR31-T guarantees valid RESET output logic states?
MXD1817XR31-T guarantees valid RESET/RESET logic states down to VCC = +1.0V across the full -40°C to +105°C temperature range. Below this, output behavior is not specified. This ensures deterministic reset signaling during deep brownout conditions where other supervisors may enter undefined states, critical for fail-safe embedded systems.
How does the 100ms reset timeout of MXD1817XR31-T behave across temperature and supply voltage?
The 100ms minimum reset timeout (tRP) of MXD1817XR31-T is guaranteed over -40°C to +105°C and VCC = 1.2V to 5.5V. Typical timeout is 100–150ms, with maximum 250ms. The timeout period is generated by an internal RC timer unaffected by external capacitance, ensuring consistent reset hold time regardless of PCB layout or environmental conditions.
Is MXD1817XR31-T compatible with lead-free soldering processes?
Yes, MXD1817XR31-T is available in lead(Pb)-free packaging. The "-T" suffix denotes leaded packaging; for lead-free, order with "+T" suffix (e.g., MXD1817XR31+T). The device supports standard reflow profiles including JEDEC J-STD-020, with peak temperature up to +300°C for 10 seconds, and is qualified for RoHS compliance per EU Directive 2011/65/EU.
MXD1817XR31-T 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:
- 3.06V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MXD1817XR31-T FAQ
1.How can I place an order for MXD1817XR31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR31-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 MXD1817XR31-T reliable?
The price and inventory of MXD1817XR31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR31-T is usually 5 days.
3.What payment methods are accepted for MXD1817XR31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR31-T?
MXD1817XR31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR31-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 MXD1817XR31-T?
For technical support, including MXD1817XR31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR31-T requirements.
6.How does Aetrix verify that MXD1817XR31-T is sourced from the original manufacturer or authorized distributors?
All MXD1817XR31-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 MXD1817XR31-T meets industry standards.
7.What is the process for return or replacement of MXD1817XR31-T?
All MXD1817XR31-T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR31-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 MXD1817XR31-T part is unused and in its original packaging.
Return procedure for MXD1817XR31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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