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Analog Devices Inc./Maxim Integrated MXD1810UR46+T
- Part No.:
- MXD1810UR46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MXD1810UR46+T.pdf
- Description:
- IC MPU RESET CIRC 4.62V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,270
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Product details
Overview
MXD1810UR46+T from Maxim Integrated is a precision 5V microprocessor reset supervisor IC with active-low open-drain RESET output, 4.62V ±2.5% factory-trimmed reset threshold, 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It monitors power supply integrity in embedded controllers and portable systems requiring reliable brownout protection without external components.
For engineers reviewing the MXD1810UR46+T datasheet, MXD1810UR46+T pinout, MXD1810UR46+T application, or MXD1810UR46+T equivalent, key selection criteria include its 4.62V reset threshold accuracy over -40°C to +105°C, 4μA typical supply current at +3.6V, internal 5.5kΩ pullup resistor, immunity to sub-5µs VCC transients, and SOT23-3 package compatibility with DS181x-series designs.
Technical Context
The MXD1810UR46+T implements a precision bandgap-based voltage comparator with hysteresis-free threshold detection and an internal monostable timer for fixed 100ms reset assertion after VCC recovery. Its open-drain RESET output interfaces directly with bidirectional μP reset pins and requires no external pullup.
Designed for +5V systems, it guarantees valid reset signaling across full industrial temperature range (-40°C to +105°C) and maintains functional reset state down to VCC = +1V. The device rejects fast negative-going VCC transients up to 70µs when overdriven by 20mV below threshold, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62V ±2.5% (factory-trimmed), enabling precise brownout detection for +5V rails |
| Reset Timeout Period | 100ms minimum (tRP), ensuring sufficient processor initialization time after power recovery |
| Supply Current | 4μA typical at +3.6V, supporting ultra-low-power battery-operated applications |
| Operating Voltage Range | +1.0V to +5.5V, allowing valid reset assertion even during deep brownout conditions |
| Output Type | Active-low open-drain with internal 5.5kΩ pullup to VCC, eliminating external resistor need |
| Package | SOT23-3, footprint-compatible with industry-standard DS181x reset ICs |
| Temperature Range | -40°C to +105°C, qualified for industrial and extended-temperature embedded systems |
Pinout & Package
MXD1810UR46+T is housed in a 3-pin SOT23 package (U3-1 outline), measuring 2.92mm × 1.3mm × 1.0mm, with gull-wing leads and RoHS-compliant lead(Pb)-free plating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; pulled high internally via 5.5kΩ resistor to VCC; sinks ≥10mA when asserted |
| 2 | VCC | Primary power supply input and reset threshold reference; accepts +1.0V to +5.5V |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for stable threshold accuracy |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, comparator, timer, and pullup eliminate BOM cost and layout area |
| Power-supply transient immunity | Rejects VCC glitches ≤70µs duration when VCC drops 20mV below 4.62V threshold |
| Guaranteed reset validity to VCC = +1V | Ensures deterministic reset behavior during severe brownout, critical for fail-safe embedded control |
| ±2.5% threshold accuracy over temperature | Maintains tight 4.62V trip point across -40°C to +105°C, reducing design margin uncertainty |
| Low quiescent current (4μA) | Minimizes battery drain in always-on monitoring circuits; enables >10-year coin-cell lifetime |
Applications
| Computers and Controllers | Intelligent Instruments |
|---|---|
Use Scenario: Monitoring +5V supply in industrial PLC CPU modules during line-voltage sags. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt processor execution until stable +5V rail is restored. Use Value: Prevents corrupted firmware writes and state-machine lockups during 100ms–500ms utility brownouts. |
Use Scenario: Power sequencing in handheld multimeters with dual-mode LCD and microcontroller. IC Role / Device Role / Timing Role: Reset generator ensuring clean boot after battery insertion or low-battery recovery. Use Value: Eliminates need for manual reset button while guaranteeing 100ms minimum hold time for flash memory initialization. |
| Set-Top Boxes | Printers |
Use Scenario: Cold-start reliability in cable STBs with multiple DC/DC rails derived from +5V input. IC Role / Device Role / Timing Role: Primary reset supervisor for main SoC, triggered only when +5V falls below 4.62V. Use Value: Avoids spurious resets caused by transient coupling between isolated 3.3V/1.8V rails and main +5V bus. |
Use Scenario: Power-up coordination in inkjet printer mainboard with motor driver and USB PHY. IC Role / Device Role / Timing Role: Single-point reset source synchronizing MCU, ASIC, and interface logic on +5V rail. Use Value: Ensures USB enumeration completes only after all peripherals are fully powered and stable. |
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 | 4.63V threshold, 140ms min timeout, push-pull output (no internal pullup) | Requires external pullup for bidirectional μP reset pins; higher ICC (15μA typ) | Choose when push-pull drive strength >10mA is needed or when board already includes pullup |
| TPS3808G33DBVR | 3.08V threshold, adjustable delay (200ms default), SOT23-6 package | Not pin-compatible; requires PCB redesign; supports adjustable timeout and enable input | Choose when system requires programmable reset duration or enable-controlled reset assertion |
Compared with MAX809TRD3+T, MXD1810UR46+T offers lower quiescent current and integrated pullup for simpler interfacing; compared with TPS3808G33DBVR, it provides direct SOT23-3 drop-in replacement capability and tighter threshold tolerance at the expense of configurability.
Availability
MXD1810UR46+T is available at Aetrix Electronics and suitable for industrial controllers, portable instrumentation, and set-top box designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1810UR46+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 cost-sensitive, space-constrained microprocessor supervisory applications in portable and industrial equipment requiring precision voltage monitoring and minimal external components.
FAQ
What is the exact reset threshold voltage of MXD1810UR46+T and how tightly is it specified?
The MXD1810UR46+T has a factory-set reset threshold of 4.62V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +105°C). This specification is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix R46, with min/typ/max values of 4.50V/4.62V/4.75V. The threshold is trimmed during production and does not require calibration.
Does MXD1810UR46+T support manual reset functionality via the RESET pin?
No, MXD1810UR46+T does not include manual reset detection. That feature is exclusive to MXD1813/MXD1818 variants (e.g., MXD1813UR46+T). The MXD1810UR46+T RESET pin is output-only and functions solely as an active-low open-drain reset signal driven by the internal voltage monitor - it cannot be used to initiate reset externally.
Can MXD1810UR46+T operate reliably when VCC drops below 2.0V?
Yes, MXD1810UR46+T is guaranteed to assert and maintain a valid RESET signal down to VCC = +1.0V, as stated in both the General Description and Absolute Maximum Ratings sections. Its internal circuitry remains functional and the open-drain output retains defined logic states even at this low supply voltage, making it suitable for deep brownout scenarios.
What is the purpose of the internal 5.5kΩ pullup resistor in MXD1810UR46+T?
The internal 5.5kΩ pullup resistor connects the RESET pin to VCC, ensuring the output defaults to logic-high when not actively driven low. This eliminates the need for an external pullup resistor and enables direct connection to microprocessors with bidirectional reset pins (e.g., Motorola 68HC11), simplifying layout and reducing BOM count while maintaining noise immunity.
Is MXD1810UR46+T pin-compatible with legacy DS181x reset ICs?
Yes, MXD1810UR46+T is explicitly documented as pin-compatible with DS181x products in the SOT23 package. The pinout (VCC on pin 2, GND on pin 3, RESET on pin 1) matches DS1810–DS1813, enabling drop-in replacement in existing designs without PCB modification, provided the reset threshold and output configuration meet system requirements.
MXD1810UR46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MXD1810UR46+T FAQ
1.How can I place an order for MXD1810UR46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1810UR46+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 MXD1810UR46+T reliable?
The price and inventory of MXD1810UR46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1810UR46+T is usually 5 days.
3.What payment methods are accepted for MXD1810UR46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1810UR46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1810UR46+T?
MXD1810UR46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1810UR46+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 MXD1810UR46+T?
For technical support, including MXD1810UR46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1810UR46+T requirements.
6.How does Aetrix verify that MXD1810UR46+T is sourced from the original manufacturer or authorized distributors?
All MXD1810UR46+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 MXD1810UR46+T meets industry standards.
7.What is the process for return or replacement of MXD1810UR46+T?
All MXD1810UR46+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1810UR46+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 MXD1810UR46+T part is unused and in its original packaging.
Return procedure for MXD1810UR46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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