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Analog Devices Inc./Maxim Integrated MXD1815XR23+T
- Part No.:
- MXD1815XR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1815XR23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MXD1815XR23+T from Maxim Integrated is a low-power microprocessor reset supervisor IC with active-low open-drain RESET output, factory-trimmed 2.31V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and operation down to VCC = +1.0V. It monitors +2.5V/+3.0V/+3.3V power rails in portable and industrial embedded systems requiring reliable brownout detection without external components.
For engineers reviewing the MXD1815XR23+T datasheet, MXD1815XR23+T pinout, MXD1815XR23+T application, or MXD1815XR23+T equivalent, this device delivers precision supply monitoring for battery-powered μP systems where low quiescent current (4μA), transient immunity, and SC70-3 space efficiency are critical selection criteria.
Technical Context
The MXD1815XR23+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.31V, asserting RESET within 5μs. Its internal timer guarantees ≥100ms reset assertion after VCC recovers above threshold, independent of supply ramp rate.
As an open-drain active-low supervisor, it integrates a 5.5kΩ internal pullup resistor and interfaces directly with bidirectional μP reset pins (e.g., Motorola 68HC11) without external biasing. It is not equipped with manual-reset debounce - that feature is exclusive to MXD1813/MXD1818 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V ±2.5% over -40°C to +105°C - ensures reliable brownout detection for +2.5V/+3.0V/+3.3V systems |
| Reset Timeout Period | 100ms minimum - guarantees sufficient μP initialization time after power recovery |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable equipment |
| VCC Operating Range | +1.0V to +5.5V - supports valid RESET logic state even during deep brownout |
| Output Type | Open-drain active-low with 5.5kΩ internal pullup - eliminates need for external resistor when interfacing with bidirectional μP reset pins |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for space-constrained PCB layouts |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1815XR23+T is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), optimized for high-density portable designs. Pin 1 is RESET (open-drain active-low), Pin 2 is VCC (supply input and threshold monitor), and Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output; requires no external pullup due to integrated 5.5kΩ resistor to VCC |
| 2 | VCC | Primary supply input and reset threshold reference; monitored continuously for brownout detection |
| 3 | GND | System ground reference for comparator and output stage; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.31V reset threshold | Factory-trimmed ±2.5% accuracy over full temperature range ensures consistent brownout response across operating conditions |
| No external components required | Integrated voltage reference, comparator, timer, and pullup eliminate BOM cost and layout area for basic reset supervision |
| 4μA supply current | Enables >10-year battery life in coin-cell–powered IoT sensors and wearables when paired with low-power μPs |
| VCC = +1.0V operation guarantee | Ensures RESET remains logically valid during deep undervoltage events, preventing spurious μP release |
| Transient immunity | Rejects negative-going VCC glitches ≤200mV amplitude and <1μs duration - prevents false resets in noisy environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch monitoring heart rhythm on single CR2032 cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Resets the ARM Cortex-M0+ μP during battery voltage sag below 2.31V to prevent corrupted memory writes or sensor misreads. Use Value: 4μA quiescent current extends battery life beyond 24 months; SC70 package fits sub-100mm² PCB area. |
Use Scenario: DIN-rail mounted I/O module operating in factory ambient (-25°C to +70°C) with 24VDC-to-3.3V conversion. IC Role / Device Role / Timing Role: Supervises the 3.3V rail feeding FPGA configuration and analog front-end; asserts reset during line transients. Use Value: Guaranteed operation to +105°C junction temperature and ±2.5% threshold stability ensure reliability in unventilated enclosures. |
| Smart Meter Data Loggers | POS Terminal Power Management |
Use Scenario: Battery-backed electricity meter storing hourly consumption data during grid outages. IC Role / Device Role / Timing Role: Monitors the 3.0V backup rail; holds μP in reset until stable post-brownout to protect flash write integrity. Use Value: 100ms fixed timeout exceeds EEPROM write cycle requirements; open-drain output interfaces directly with μP's bidirectional reset pin. |
Use Scenario: Retail point-of-sale terminal using Li-ion battery backup during AC failure. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during switchover and forces controlled shutdown sequence via μP interrupt. Use Value: Valid RESET output down to VCC = +1.0V ensures deterministic behavior during final battery discharge phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.93V reset threshold, SOT23-3 package, 1.6μA ICC, no internal pullup - requires external 100kΩ pullup for open-drain interface | Targeted at +3.3V systems needing higher threshold; less suitable for 2.5V rails or space-constrained layouts | Select when higher reset voltage margin is needed and SC70 footprint is not mandatory |
| TPS3808G125DBVR | 1.25V threshold, adjustable via external resistor, 1.5μA ICC, push-pull output - no internal pullup, different pinout | Designed for ultra-low-voltage ASICs or custom threshold tuning; incompatible with direct bidirectional μP reset pin connection | Choose only if threshold flexibility or sub-1.8V operation is required; redesign needed for pin compatibility |
Compared with MXD1815XR23+T, MAX809TRD2+T offers lower power but lacks integrated pullup and SC70 size, while TPS3808G125DBVR provides adjustability at the cost of added components and loss of plug-in compatibility with existing bidirectional reset designs.
Availability
MXD1815XR23+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter data loggers, and POS terminal power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1815XR23+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was designed specifically for low-power, space-constrained microprocessor reset supervision in battery-operated and thermally demanding embedded systems - prioritizing precision, integration, and robustness over configurability.
FAQ
What is the exact reset threshold voltage of the MXD1815XR23+T and how accurate is it?
The MXD1815XR23+T has a factory-set reset threshold of 2.31V, guaranteed to remain within ±2.5% over the full operating temperature range of -40°C to +105°C. This specification ensures consistent brownout detection across environmental extremes without calibration. The value is confirmed in the Electrical Characteristics table under "MXD181_ _ R23" row, with min/typ/max values of 2.25V/2.31V/2.37V.
Does the MXD1815XR23+T support manual reset via an external pushbutton?
No, the MXD1815XR23+T does not include manual-reset debounce functionality. That feature is exclusive to the MXD1813 and MXD1818 variants in the same family. The MXD1815XR23+T provides only power-supply monitoring and automatic reset assertion on VCC drop - it lacks the internal circuitry to detect and debounce external button presses on the RESET pin.
Can the MXD1815XR23+T be used with a microcontroller that has a bidirectional reset pin?
Yes, the MXD1815XR23+T is explicitly designed for this use case. Its open-drain active-low RESET output, combined with the integrated 5.5kΩ internal pullup resistor, allows direct connection to bidirectional μP reset pins (e.g., Motorola 68HC11) without external components. The datasheet confirms this capability in the "Interfacing to μPs with Bidirectional Reset Pins" section.
What is the maximum supply voltage the MXD1815XR23+T can tolerate?
The MXD1815XR23+T supports a supply voltage range of +1.0V to +5.5V, with absolute maximum VCC rating of +6.0V. Operation up to +5.5V ensures compatibility with legacy +5V systems, while the +1.0V lower limit guarantees RESET logic validity during deep brownout - a key requirement for fail-safe embedded control.
Is the MXD1815XR23+T RoHS-compliant and what does the "+T" suffix indicate?
Yes, the "+T" suffix in MXD1815XR23+T explicitly denotes lead(Pb)-free, RoHS-compliant packaging per Maxim Integrated's ordering conventions. This replaces the standard "-T" suffix used for leaded versions. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering per industry standards.
MXD1815XR23+T 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:
- 2.31V
- 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
MXD1815XR23+T FAQ
1.How can I place an order for MXD1815XR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1815XR23+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 MXD1815XR23+T reliable?
The price and inventory of MXD1815XR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1815XR23+T is usually 5 days.
3.What payment methods are accepted for MXD1815XR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1815XR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1815XR23+T?
MXD1815XR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1815XR23+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 MXD1815XR23+T?
For technical support, including MXD1815XR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1815XR23+T requirements.
6.How does Aetrix verify that MXD1815XR23+T is sourced from the original manufacturer or authorized distributors?
All MXD1815XR23+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 MXD1815XR23+T meets industry standards.
7.What is the process for return or replacement of MXD1815XR23+T?
All MXD1815XR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1815XR23+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 MXD1815XR23+T part is unused and in its original packaging.
Return procedure for MXD1815XR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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