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Analog Devices Inc./Maxim Integrated MXD1815XR23+
- Part No.:
- MXD1815XR23+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1815XR23+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
MXD1815XR23+ from Maxim Integrated is a low-power microprocessor reset supervisor IC in SC70-3 package, featuring active-low open-drain RESET output, factory-set 2.31V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It monitors +2.5V/+3.0V/+3.3V power rails in portable embedded systems to prevent code-execution errors during brownout.
For engineers reviewing the MXD1815XR23+ datasheet, MXD1815XR23+ pinout, MXD1815XR23+ application, or MXD1815XR23+ equivalent, key selection criteria include reset threshold accuracy, manual-reset debounce capability (not present in this variant), open-drain drive strength, supply current at low VCC, and compatibility with bidirectional μP reset pins.
Technical Context
The MXD1815XR23+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.31V, triggering an open-drain active-low RESET assertion. Its internal timer guarantees ≥100ms reset pulse width after VCC recovers above threshold, independent of VCC slew rate.
This variant lacks manual-reset debounce logic (exclusive to MXD1813/MXD1818) and uses an internal 5.5kΩ pullup resistor on RESET. It operates across -40°C to +105°C and maintains valid RESET output down to VCC = +1V, supporting battery-powered systems with deep discharge profiles.
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/+3.3V systems |
| Reset Timeout | 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 signaling even during deep brownout |
| Output Type | Open-drain active-low with 5.5kΩ internal pullup - interfaces directly with bidirectional μP reset pins without external components |
| Package | 3-pin SC70 - 2.0mm × 1.25mm footprint for space-constrained PCBs |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1815XR23+ is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.9mm with gull-wing leads. The package is RoHS-compliant and lead-free (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Active-low open-drain reset output; requires external pullup only if interfacing with non-bidirectional inputs |
| 2 (SC70) | VCC | Power supply input and reset threshold monitoring node; accepts +1.0V to +5.5V |
| 3 (SC70) | GND | Analog ground reference for internal comparator and timer circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.31V with ±2.5% tolerance over full temperature range - eliminates need for external calibration |
| No external components required | Integrated pullup resistor and comparator - reduces BOM count and board area vs. discrete solutions |
| Low supply current | 4μA typical at +3.6V - extends battery life in always-on monitoring applications |
| Brownout immunity | Valid RESET output down to VCC = +1V - ensures deterministic reset state during deep undervoltage |
| Transient rejection | Immune to fast VCC glitches <10µs at 200mV overdrive - prevents spurious resets in noisy environments |
Applications
| Computers and Controllers | Intelligent Instruments |
|---|---|
Use Scenario: Monitoring 3.3V core supply in industrial PLC controllers during mains fluctuation. IC Role / Device Role / Timing Role: Supervisor IC asserting active-low RESET to hold CPU in reset until stable 3.3V rail is confirmed. Use Value: Prevents corrupted firmware execution during 100–250ms brownout events with ±2.5% threshold accuracy. | Use Scenario: Power-rail supervision in handheld multimeters powered by two AA cells. IC Role / Device Role / Timing Role: Reset generator maintaining valid logic state as battery decays from 3.3V to 1.8V. Use Value: Guarantees safe shutdown before ADC reference collapse, enabled by +1V operational floor. |
| Set-Top Boxes | Portable/Battery-Powered Equipment |
Use Scenario: 2.5V I/O supply monitoring in digital cable receivers during hot-swap events. IC Role / Device Role / Timing Role: Open-drain RESET output tied to SoC's bidirectional reset pin without external pullup. Use Value: Eliminates external resistor while ensuring clean reset assertion during 2.5V rail dip below 2.31V. | Use Scenario: Supervising 3.3V LDO output in Bluetooth LE wearables with coin-cell batteries. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >5-year shelf life with 4μA ICC. Use Value: Reduces system standby current by replacing discrete reset circuits with integrated solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.93V reset threshold, SOT23-3, 1.6μA ICC, no internal pullup | Higher threshold unsuitable for 2.5V systems; requires external pullup resistor | Select when 2.93V brownout point matches system rail and board space allows external component |
| TPS3808G12QDBVRQ1 | 1.2V threshold, adjustable via external resistor, 1.5μA ICC, push-pull output | Adjustable threshold adds design flexibility but increases BOM; push-pull incompatible with bidirectional μP pins | Choose for automotive-grade AEC-Q100 compliance and programmable reset points, not for drop-in replacement |
Compared with MXD1815XR23+, MAX809TRD2+T offers lower quiescent current but lacks internal pullup and has mismatched threshold for 2.5V systems, while TPS3808G12QDBVRQ1 provides AEC-Q100 qualification and adjustability at the cost of added external components and incompatible output structure.
Availability
MXD1815XR23+ is available at Aetrix Electronics and suitable for computers and controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MXD1815XR23+ 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 industrial, communications, and consumer applications, with emphasis on power management and sensor interface solutions.
The MXD1810–MXD1818 family was developed specifically for low-power, space-constrained microprocessor reset supervision in portable and industrial systems, prioritizing threshold accuracy, ultra-low ICC, and minimal external component count.
FAQ
What is the exact reset threshold voltage of MXD1815XR23+ and how tightly is it specified?
The MXD1815XR23+ has a factory-trimmed reset threshold of 2.31V, with a guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +105°C). This specification ensures consistent brownout detection across environmental conditions without requiring external calibration, and is validated per the Electrical Characteristics table in the official datasheet.
Does MXD1815XR23+ support manual reset functionality via the RESET pin?
No, MXD1815XR23+ does not include manual-reset debounce logic. That feature is exclusive to the MXD1813 and MXD1818 variants. The MXD1815XR23+ RESET pin serves only as an open-drain active-low output and must not be externally driven low - doing so may cause undefined behavior or damage.
What is the purpose of the internal 5.5kΩ pullup resistor in MXD1815XR23+?
The internal 5.5kΩ pullup resistor on the RESET pin of MXD1815XR23+ enables direct connection to microprocessors with bidirectional reset pins (e.g., Motorola 68HC11) without requiring an external pullup. It ensures a defined high state when RESET is not asserted, eliminating one external component while maintaining compatibility with open-drain bus architectures.
Can MXD1815XR23+ operate reliably when VCC drops below 2.0V?
Yes, MXD1815XR23+ is guaranteed to maintain valid RESET/RESET logic states down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections. This allows deterministic reset assertion even during deep brownout conditions common in battery-powered systems approaching end-of-life.
Which package type does MXD1815XR23+ use and what are its key mechanical dimensions?
MXD1815XR23+ uses the 3-pin SC70 package (outline X3-2), with footprint dimensions of 2.0mm × 1.25mm and height of 0.9mm. Its gull-wing leads and RoHS-compliant lead-free construction meet modern assembly requirements, and the small size supports high-density PCB layouts in portable electronics.
MXD1815XR23+ 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+ FAQ
1.How can I place an order for MXD1815XR23+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1815XR23+ 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+ reliable?
The price and inventory of MXD1815XR23+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1815XR23+ is usually 5 days.
3.What payment methods are accepted for MXD1815XR23+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1815XR23+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1815XR23+?
MXD1815XR23+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1815XR23+ 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+?
For technical support, including MXD1815XR23+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1815XR23+ requirements.
6.How does Aetrix verify that MXD1815XR23+ is sourced from the original manufacturer or authorized distributors?
All MXD1815XR23+ 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+ meets industry standards.
7.What is the process for return or replacement of MXD1815XR23+?
All MXD1815XR23+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1815XR23+, 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+ part is unused and in its original packaging.
Return procedure for MXD1815XR23+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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