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Analog Devices Inc./Maxim Integrated MXD1812XR41+T
- Part No.:
- MXD1812XR41+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1812XR41+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,459
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Product details
Overview
MXD1812XR41+T from Maxim Integrated is a low-power microprocessor reset supervisor IC with active-high push-pull RESET output, factory-set 4.12V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It monitors +5V systems, provides transient-immune power-supply supervision, and is housed in a space-saving 3-pin SC70 package for portable/battery-powered equipment.
For engineers reviewing the MXD1812XR41+T datasheet, MXD1812XR41+T pinout, MXD1812XR41+T application, or MXD1812XR41+T equivalent, key selection criteria include reset polarity (active-high), manual-reset capability (absent in this variant), open-drain vs. push-pull output drive strength, threshold voltage tolerance, and compatibility with μP reset input timing requirements under brownout conditions.
Technical Context
The MXD1812XR41+T implements a precision bandgap-based voltage comparator that asserts RESET when VCC falls below 4.12V and holds it asserted for ≥100ms after VCC rises above threshold. Its internal timer is monolithic and temperature-compensated, ensuring stable timeout across –40°C to +105°C.
Unlike MXD1813/MXD1818 variants, it lacks manual-reset debounce circuitry and does not respond to external low pulses on the RESET pin. Its push-pull output delivers 350μA source current and sinks 10mA at 0.4V, enabling direct interface with CMOS μP reset inputs without external pull resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.12V ±2.5% - ensures reliable reset assertion before +5V system brownout compromises logic integrity |
| Reset Timeout Period | 100ms min - guarantees sufficient hold time for μP initialization after power recovery |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable monitoring applications |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET output even during deep undervoltage, critical for fail-safe sequencing |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies PCB layout |
| Temperature Range | –40°C to +105°C - qualified for industrial and extended-temperature embedded control environments |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint saves board space in compact portable designs |
Pinout & Package
MXD1812XR41+T is supplied in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with 0.65mm pitch and exposed pad optional per Maxim's package documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Active-high push-pull output - drives high during normal operation; pulls low only during reset assertion |
| 2 (SC70) | VCC | Power supply input and reset-threshold reference - monitors system rail directly; no external divider needed |
| 3 (SC70) | GND | Analog and digital ground reference - must be connected to system ground plane for accurate threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.12V reset threshold | ±2.5% accuracy over full temperature range ensures consistent brownout response across operating conditions |
| 100ms fixed reset timeout | Monolithic timer eliminates external RC components and avoids drift due to capacitor aging or temperature |
| Active-high push-pull RESET | Directly interfaces with μPs requiring active-high reset (e.g., certain ARM Cortex-M series) without level-shifting |
| 4μA supply current | Enables integration into always-on subsystems (e.g., RTC backup supervisors) without impacting battery budget |
| VCC = +1V operation guarantee | Ensures deterministic RESET state during deep undervoltage, preventing spurious μP wake-up or latch-up |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered from +5V rails subject to intermittent brownouts in factory environments. IC Role / Device Role / Timing Role: Supervises main +5V supply and asserts active-high RESET to halt processor execution until stable voltage is restored. Use Value: Prevents corrupted firmware writes or erratic I/O behavior during voltage sags by enforcing 100ms minimum reset hold time. |
Use Scenario: Handheld glucose meters using coin-cell batteries where supply voltage decays gradually from 5.0V to 3.0V. IC Role / Device Role / Timing Role: Monitors declining +5V rail and triggers active-high RESET before MCU enters undefined state near end-of-life. Use Value: Guarantees clean shutdown and data retention by asserting reset down to VCC = +1V, extending usable battery life. |
| Set-Top Box Power Management | Battery-Powered Data Loggers |
Use Scenario: Consumer STB with standby +5V rail and main +5V domain that powers up on IR command. IC Role / Device Role / Timing Role: Provides power-on reset pulse synchronized to +5V rail stabilization, ensuring deterministic boot sequence. Use Value: Eliminates need for external RC network, reducing BOM count and improving startup repeatability across units. |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 minutes using a +5V boost converter. IC Role / Device Role / Timing Role: Supervises boosted +5V rail and asserts active-high RESET if voltage drops below 4.12V during battery depletion. Use Value: Prevents corrupted flash writes by halting MCU operation before supply collapse, preserving stored measurement history. |
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 | 4.00V reset threshold (±2.5%), SOT23-3, active-low open-drain output, no manual reset | Requires external pullup; incompatible with active-high reset inputs; same 100ms timeout and temp range | Select when legacy design uses active-low reset and existing pullup resistor is present |
| TPS3808G33DBVR | 3.3V reset threshold, SOT23-6, adjustable delay via capacitor, 1.8μA quiescent current | Higher pin count; supports programmable timeout; optimized for lower-voltage systems (not +5V) | Choose for new designs needing ultra-low power or flexible timeout, but verify 3.3V threshold matches system needs |
Compared with MXD1812XR41+T, MAX809TRD3+T requires external biasing and changes reset polarity, while TPS3808G33DBVR offers lower power and configurability but targets 3.3V domains - neither provides the exact 4.12V active-high push-pull combination in SC70.
Availability
MXD1812XR41+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, set-top box power management, and battery-powered data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1812XR41+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 analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was designed to deliver cost-effective, space-efficient power-supply supervision for microprocessor-based systems operating at +2.5V, +3.3V, and +5V, with emphasis on low quiescent current and wide temperature operation.
FAQ
What is the reset threshold voltage of the MXD1812XR41+T?
The MXD1812XR41+T has a factory-trimmed reset threshold of 4.12V, with ±2.5% accuracy over the full operating temperature range (–40°C to +105°C). This value is confirmed in the Electrical Characteristics table under "MXD181_ _ R41" condition and applies specifically to the MXD1812XR41+T variant.
Does the MXD1812XR41+T support manual reset functionality?
No, the MXD1812XR41+T does not include manual reset debounce circuitry. That feature is exclusive to MXD1813 and MXD1818 variants. The MXD1812XR41+T responds only to VCC voltage drops below its 4.12V threshold and asserts RESET accordingly - it ignores signals applied to the RESET pin.
What is the output configuration of the MXD1812XR41+T RESET pin?
The MXD1812XR41+T features an active-high push-pull RESET output. During normal operation (VCC > 4.12V), RESET is driven high; when VCC falls below threshold, RESET is actively pulled low for ≥100ms. This eliminates the need for an external pullup resistor.
Can the MXD1812XR41+T operate reliably at VCC = +1.0V?
Yes, the MXD1812XR41+T is guaranteed to maintain correct RESET/RESET logic states down to VCC = +1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics sections. This ensures deterministic behavior during deep undervoltage events.
Which package type does the MXD1812XR41+T use, and what are its dimensions?
The MXD1812XR41+T uses a 3-pin SC70 package (Maxim outline X3-2), measuring 2.0mm × 2.1mm with 0.65mm lead pitch. Its small footprint supports high-density PCB layouts in portable and space-constrained applications.
MXD1812XR41+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.12V
- 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
MXD1812XR41+T FAQ
1.How can I place an order for MXD1812XR41+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1812XR41+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 MXD1812XR41+T reliable?
The price and inventory of MXD1812XR41+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1812XR41+T is usually 5 days.
3.What payment methods are accepted for MXD1812XR41+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1812XR41+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1812XR41+T?
MXD1812XR41+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1812XR41+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 MXD1812XR41+T?
For technical support, including MXD1812XR41+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1812XR41+T requirements.
6.How does Aetrix verify that MXD1812XR41+T is sourced from the original manufacturer or authorized distributors?
All MXD1812XR41+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 MXD1812XR41+T meets industry standards.
7.What is the process for return or replacement of MXD1812XR41+T?
All MXD1812XR41+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1812XR41+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 MXD1812XR41+T part is unused and in its original packaging.
Return procedure for MXD1812XR41+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1812XR41+T Tags
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