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Analog Devices Inc./Maxim Integrated MXD1817XR29+
- Part No.:
- MXD1817XR29+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR29+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
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Product details
Overview
MXD1817XR29+ from Maxim Integrated is a low-power microprocessor reset supervisor IC in SC70-3 package, featuring active-high push-pull RESET output, factory-set 2.88V 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 and industrial μP systems requiring reliable brownout detection and clean power-up sequencing.
For engineers reviewing the MXD1817XR29+ datasheet, MXD1817XR29+ pinout, MXD1817XR29+ application, or MXD1817XR29+ equivalent, key selection criteria include reset polarity (active-high), manual-reset absence (distinguishing it from MXD1813/MXD1818), SC70 footprint compatibility, guaranteed VCC = +1V logic validity, and transient-immune comparator design for noisy supply rails.
Technical Context
The MXD1817XR29+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.88V, triggering an active-high RESET assertion. Its internal timer ensures RESET remains high for ≥100ms after VCC rises above threshold, independent of supply slew rate.
No external components are required: the device integrates all sensing, timing, and output drive circuitry. Unlike MXD1813/MXD1818 variants, it lacks manual-reset input debouncing and does not respond to external RESET pin pulls - its RESET pin is output-only, push-pull, and active-high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.88V ±2.5% over -40°C to +105°C - ensures reliable detection of 3.3V supply brownout before μP instability occurs |
| Reset Timeout Period | 100ms (min) - guarantees sufficient hold time for full μP initialization and peripheral stabilization |
| Supply Current | 4μA typical at +3.6V - enables use in battery-powered equipment with multi-year standby life |
| VCC Operating Range | +1.0V to +5.5V - maintains valid RESET logic state even during deep brownout, critical for fail-safe shutdown |
| Output Type | Active-high push-pull - drives RESET line directly without external pullup; sinks 10mA / sources 350μA |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint, compatible with high-density PCB layouts and automated assembly |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1817XR29+ is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with 0.65mm pin pitch and exposed pad optional. The compact 2.0mm × 2.1mm body supports space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output - asserts high during reset; no external pullup needed; drives μP reset input directly |
| 2 | VCC | Power supply input and reset threshold reference - monitors system rail; must be decoupled locally |
| 3 | GND | Analog ground reference - requires low-impedance connection to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.88V factory-trimmed with ±2.5% accuracy over full temperature range - eliminates calibration overhead in 3.3V systems |
| Guaranteed logic validity to VCC = +1V | Ensures RESET remains asserted until supply collapses completely - prevents spurious release during catastrophic brownout |
| Transient-immune comparator | Rejects fast VCC glitches ≤10µs (at 200mV overdrive) - avoids false resets in electrically noisy environments |
| No external components required | Integrates reference, comparator, timer, and output driver - reduces BOM count, board area, and qualification effort |
| Low quiescent current | 4μA typical - extends battery life in always-on monitoring applications such as smart sensors and wearables |
Applications
| Industrial PLC Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: Monitoring 3.3V main power rail in programmable logic controller I/O modules subject to field-induced transients. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-high signal to ARM Cortex-M7 microcontroller during brownout. Use Value: 2.88V threshold aligns with 3.3V system margin; 100ms timeout exceeds μP boot ROM execution time; SC70 package fits tight I/O carrier boards. |
Use Scenario: Ensuring safe startup and shutdown sequencing in handheld ECG monitors powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Reset supervisor maintaining active-high RESET until regulated 3.3V rail stabilizes post-battery boost conversion. Use Value: 4μA supply current minimizes standby drain; VCC = +1V validity prevents premature release during battery sag; small SC70 footprint saves space on compact flex PCBs. |
| Network Edge Routers | Smart Energy Meters |
|
Use Scenario: Power supply monitoring in fanless edge router control cards operating in uncontrolled ambient temperatures. IC Role / Device Role / Timing Role: Voltage supervisor providing robust reset assertion for MIPS-based SoC during AC/DC converter undervoltage events. Use Value: -40°C to +105°C rating ensures reliability across outdoor deployments; ±2.5% threshold accuracy maintains timing margin across temperature extremes. |
Use Scenario: Critical reset generation in ANSI C12.22-compliant electricity meters exposed to grid voltage sags and surges. IC Role / Device Role / Timing Role: Brownout detector asserting active-high reset to metering ASIC when 3.3V auxiliary supply drops below 2.88V. Use Value: Transient immunity rejects sub-10µs grid noise; push-pull output eliminates external pullup resistor - improving long-term reliability in sealed meter housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | Active-low open-drain output; 3.08V reset threshold; includes internal 50kΩ pullup; same SC70-3 package | Requires external pullup for active-high interface; higher threshold less suitable for 3.3V systems near dropout | Select when interfacing with legacy μPs requiring active-low reset and existing pullup infrastructure |
| TPS3808G33DBVR | Active-low push-pull output; 3.08V threshold; adjustable timeout via capacitor; 1.5μA typical ICC | Higher threshold and active-low polarity necessitate level-shifting or firmware adaptation; timeout flexibility adds design complexity | Choose when ultra-low current (<2μA) or programmable delay is prioritized over pinout and threshold match |
Compared with MXD1817XR29+, MAX809TRD3+T requires redesign of reset signal polarity handling and offers less precise 3.08V threshold for 3.3V rails, while TPS3808G33DBVR trades fixed 100ms timing and exact 2.88V detection for lower current and configurability - neither provides drop-in replacement capability due to output polarity and threshold mismatch.
Availability
MXD1817XR29+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, network edge routers, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1817XR29+ 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 cost-sensitive, space-constrained microprocessor supervisory functions in portable and industrial systems - delivering precision reset thresholds, ultra-low power, and minimal external component count in tiny SC70/SOT23 packages.
FAQ
What is the reset output polarity and configuration of the MXD1817XR29+?
The MXD1817XR29+ features an active-high push-pull RESET output. Pin 1 delivers a logic-high signal during reset assertion and actively drives low when reset is deasserted. This eliminates the need for an external pullup resistor and ensures fast, deterministic transitions into and out of reset - a key differentiator from open-drain alternatives like MXD1816XR29+.
Does the MXD1817XR29+ support manual reset functionality via the RESET pin?
No, the MXD1817XR29+ does not support manual reset. Its RESET pin is output-only and lacks debouncing or input detection circuitry. Manual reset capability is exclusive to MXD1813/MXD1818 variants (e.g., MXD1818XR29+), which monitor the RESET pin for >1.5µs low pulses. For MXD1817XR29+, reset is triggered solely by VCC falling below 2.88V.
What is the guaranteed operating voltage range for the MXD1817XR29+?
The MXD1817XR29+ operates over VCC = +1.0V to +5.5V across -40°C to +105°C. Crucially, its RESET output remains logically valid down to VCC = +1.0V - meaning the active-high signal stays asserted until supply collapses fully. This behavior is confirmed in the Electrical Characteristics table and distinguishes it from many competitors that lose output control below ~1.8V.
How accurate is the 2.88V reset threshold of the MXD1817XR29+ over temperature?
The MXD1817XR29+ reset threshold is specified at 2.88V ±2.5% over the full -40°C to +105°C range. This accuracy is guaranteed by design and verified in production testing at +25°C, with characterization data confirming stable performance across temperature - critical for maintaining consistent brownout protection in thermally varying environments.
Is the MXD1817XR29+ pin-compatible with other devices in the MXD181x family?
Yes, the MXD1817XR29+ shares identical SC70-3 pinout (RESET-VCC-GND) with all MXD181x XR-series variants, including MXD1815XR29+, MXD1816XR29+, and MXD1818XR29+. However, functional compatibility requires matching reset polarity and feature set: MXD1817XR29+ (active-high push-pull) is not functionally interchangeable with MXD1816XR29+ (active-low open-drain) without circuit modification.
MXD1817XR29+ 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:
- 2.88V
- 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
MXD1817XR29+ FAQ
1.How can I place an order for MXD1817XR29+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR29+ 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 MXD1817XR29+ reliable?
The price and inventory of MXD1817XR29+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR29+ is usually 5 days.
3.What payment methods are accepted for MXD1817XR29+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR29+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR29+?
MXD1817XR29+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR29+ 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 MXD1817XR29+?
For technical support, including MXD1817XR29+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR29+ requirements.
6.How does Aetrix verify that MXD1817XR29+ is sourced from the original manufacturer or authorized distributors?
All MXD1817XR29+ 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 MXD1817XR29+ meets industry standards.
7.What is the process for return or replacement of MXD1817XR29+?
All MXD1817XR29+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR29+, 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 MXD1817XR29+ part is unused and in its original packaging.
Return procedure for MXD1817XR29+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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