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Analog Devices Inc./Maxim Integrated MXD1815XR29
- Part No.:
- MXD1815XR29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1815XR29.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,824
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Product details
Overview
MXD1815XR29 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-set 2.88V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and operates from -40°C to +105°C in SC70-3 package. It monitors VCC supply integrity and asserts reset during brownout or power-up sequencing in portable controllers.
For engineers reviewing the MXD1815XR29 datasheet, MXD1815XR29 pinout, MXD1815XR29 application, or MXD1815XR29 equivalent, this page delivers verified electrical behavior, manual-reset capability validation, thermal stability data, and precise reset timing specifications required for reliable μP supervision in battery-powered and industrial embedded designs.
Technical Context
The MXD1815XR29 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.88V, coupled to a monostable timer that guarantees ≥100ms reset assertion after VCC recovery. Its internal 5.5kΩ pullup resistor enables direct interface with bidirectional μP reset pins without external components.
Unlike push-pull variants, MXD1815XR29 uses open-drain output architecture and belongs to the MXD1815–MXD1818 subfamily optimized for 2.5V–3.3V systems. It does not include manual-reset debouncing - that feature is exclusive to MXD1813/MXD1818 - and its reset assertion remains valid down to VCC = +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.88V (factory-trimmed, ±2.5% over -40°C to +105°C) - ensures reliable detection of 3.3V supply brownout before logic corruption occurs |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP initialization across all operating temperatures |
| Supply Current | 4µA typical at +3.6V - enables multi-year operation in coin-cell–powered monitoring applications |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset signaling even during deep brownout conditions down to 1V |
| Output Type | Open-drain, active-low - allows wired-OR configuration and compatibility with bidirectional μP reset inputs |
| Internal Pullup Resistor | 5.5kΩ nominal - eliminates need for external pullup while maintaining fast rise time under capacitive loads ≤10pF |
| Power-Supply Transient Immunity | Rejects negative VCC glitches <1.5µs at 2.88V overdrive - prevents false resets from switching noise |
Pinout & Package
MXD1815XR29 is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.9mm, suitable for high-density PCB layouts in space-constrained portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Active-low open-drain output; sinks current when asserted; pulled high internally via 5.5kΩ resistor to VCC |
| 2 (SC70) | VCC | Main supply input and reset threshold reference; monitored continuously for undervoltage events |
| 3 (SC70) | GND | Analog and digital ground reference; must be low-impedance connection to ensure accurate threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.88V reset threshold | Factory-trimmed ±2.5% over full temperature range ensures consistent brownout detection across environmental extremes |
| No external components required | Integrated pullup, comparator, and timer eliminate discrete resistors/capacitors - reduces BOM count and layout area |
| Low 4µA quiescent current | Enables use in always-on battery-backed systems with >10-year shelf life on CR2032 cells |
| VCC-valid reset down to +1V | Guarantees deterministic RESET state during deep undervoltage - critical for fail-safe shutdown in safety-critical firmware |
| SC70-3 footprint compatibility | Matches industry-standard 3-pin SC70 layout, enabling drop-in replacement for similar supervisors without PCB redesign |
Applications
| Industrial Controller Supervision | Portable Medical Device Power Management |
|---|---|
|
Use Scenario: Monitoring 3.3V supply rails in programmable logic controllers during factory automation line power fluctuations. IC Role / Device Role / Timing Role: Active-low reset supervisor asserting signal to ARM Cortex-M4 microcontroller upon VCC dip below 2.88V. Use Value: Prevents corrupted register writes and firmware lockup during transient brownouts, ensuring deterministic restart within 100ms. |
Use Scenario: Ensuring safe boot sequence in handheld glucose meters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Open-drain RESET output interfacing directly with bidirectional reset pin of MSP430FR59xx MCU. Use Value: Eliminates need for external pullup resistor, reducing component count and leakage path - extends battery runtime by ~2.3µA. |
| Set-Top Box Power Sequencing | Smart Sensor Node Brownout Protection |
|
Use Scenario: Coordinating power-up of SoC, memory, and tuner ICs in cable TV receivers using shared 3.3V rail. IC Role / Device Role / Timing Role: Reset generator holding system in reset until 3.3V stabilizes above 2.88V for ≥100ms post-power-on. Use Value: Avoids race conditions between peripherals and processor, eliminating boot failures caused by marginal VCC ramp rates. |
Use Scenario: Protecting LoRaWAN edge nodes deployed in remote locations where solar charging causes slow VCC ramp-up. IC Role / Device Role / Timing Role: Supervisor validating VCC integrity before releasing nRESET to Nordic nRF52840 SoC. Use Value: Guarantees firmware executes only when supply meets minimum functional voltage - prevents flash corruption during weak charge cycles. |
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 | Same 2.88V threshold, SOT23-3 package, but 1.6µA typical ICC and no internal pullup - requires external 47kΩ pullup | Lacks integrated pullup; less suitable for bidirectional reset interfaces without added components | Prefer when ultra-low current (<2µA) dominates design priority and board space permits external resistor |
| TPS3808G33DBVR | 2.93V threshold (±0.5%), 1.8µA ICC, push-pull output - no internal pullup, higher accuracy but different output structure | Push-pull output incompatible with wired-OR or bidirectional reset schemes without level-shifting | Select when highest threshold accuracy is mandatory and system uses dedicated reset line without shared bus topology |
Compared with MXD1815XR29, MAX809TRD29+T trades integrated pullup for lower quiescent current, while TPS3808G33DBVR offers tighter threshold tolerance but requires redesign for push-pull interface compatibility - MXD1815XR29 uniquely balances integration, open-drain flexibility, and 2.88V precision in SC70.
Availability
MXD1815XR29 is available at Aetrix Electronics and suitable for industrial controller supervision, portable medical device power management, and smart sensor node brownout protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1815XR29 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, computing, and consumer applications.
MXD1815XR29 belongs to the MXD1815–MXD1818 family of low-power μP reset supervisors engineered specifically for reliable power-monitoring in 2.5V/3.0V/3.3V battery-operated and space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MXD1815XR29 and how stable is it over temperature?
The MXD1815XR29 has a factory-set reset threshold of 2.88V, with guaranteed accuracy of ±2.5% across the full operating temperature range of -40°C to +105°C. This specification is validated per Electrical Characteristics table in the official datasheet, and the device maintains this tolerance without external calibration or trimming components.
Does MXD1815XR29 support manual reset functionality via the RESET pin?
No, MXD1815XR29 does not include manual reset detection or debouncing circuitry. That feature is exclusive to MXD1813 and MXD1818 variants. The RESET pin on MXD1815XR29 serves solely as an open-drain output and must not be driven externally - doing so may damage the internal structure or cause undefined behavior.
What package type and dimensions does MXD1815XR29 use, and is it RoHS-compliant?
MXD1815XR29 is supplied in a 3-pin SC70 package (X3-2 outline, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.9mm. It is available in lead(Pb)-free packaging - indicated by the "+T" suffix - and complies with RoHS Directive 2011/65/EU as confirmed in Maxim's package documentation.
Can MXD1815XR29 drive a reset line shared among multiple microcontrollers?
Yes, MXD1815XR29's open-drain, active-low RESET output supports wired-OR configurations. When used with other open-drain reset sources (e.g., watchdog timers or other supervisors), it allows multiple devices to assert a common reset bus without contention - provided a single external or internal pullup establishes the idle-high state.
What is the minimum VCC voltage at which MXD1815XR29 guarantees valid RESET output logic states?
MXD1815XR29 guarantees correct RESET/RESET logic states down to VCC = +1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics sections. This ensures deterministic reset behavior during deep brownout conditions where many competing supervisors cease functioning reliably below 1.5V.
MXD1815XR29 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:
- 2.88V
- 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
MXD1815XR29 FAQ
1.How can I place an order for MXD1815XR29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1815XR29 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 MXD1815XR29 reliable?
The price and inventory of MXD1815XR29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1815XR29 is usually 5 days.
3.What payment methods are accepted for MXD1815XR29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1815XR29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1815XR29?
MXD1815XR29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1815XR29 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 MXD1815XR29?
For technical support, including MXD1815XR29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1815XR29 requirements.
6.How does Aetrix verify that MXD1815XR29 is sourced from the original manufacturer or authorized distributors?
All MXD1815XR29 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 MXD1815XR29 meets industry standards.
7.What is the process for return or replacement of MXD1815XR29?
All MXD1815XR29 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1815XR29, 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 MXD1815XR29 part is unused and in its original packaging.
Return procedure for MXD1815XR29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1815XR29 Tags
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MIC826SYMT-TR
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