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Analog Devices Inc./Maxim Integrated MXD1810UR41+T
- Part No.:
- MXD1810UR41+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MXD1810UR41+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,868
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Product details
Overview
MXD1810UR41+T from Maxim Integrated is a precision 5V-system microprocessor reset supervisor IC with active-low open-drain 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 power supply integrity in embedded controllers and portable equipment, asserting reset during brownout, power-up, and power-down events.
For engineers reviewing the MXD1810UR41+T datasheet, MXD1810UR41+T pinout, MXD1810UR41+T application, or MXD1810UR41+T equivalent, key selection factors include its 4.12V threshold for +5V systems, 4μA quiescent current, SOT23-3 package compatibility, and absence of manual-reset debouncing - distinguishing it from MXD1813/MXD1818 variants.
Technical Context
This device implements a precision voltage comparator with hysteresis-free threshold detection and an internal monostable timer to enforce a fixed 100ms reset assertion window after VCC recovery. Its open-drain RESET output includes a 5.5kΩ internal pullup resistor, eliminating external components while enabling bidirectional reset interfacing with μPs like the Motorola 68HC11.
The MXD1810UR41+T is optimized for +5V systems only and excludes manual-reset functionality - unlike MXD1813/MXD1818 - and features transient immunity against negative-going VCC glitches up to 100µs at 4.12V overdrive, ensuring robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.12V (factory-trimmed, ±2.5% over -40°C to +105°C) - ensures reliable reset initiation before +5V system logic fails. |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for full μP initialization across all operating temperatures. |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable instrumentation and low-power IoT edge nodes. |
| VCC Operating Range | +1.0V to +5.5V - supports valid RESET assertion even during deep brownout conditions down to 1V. |
| Output Type | Open-drain, active-low with 5.5kΩ internal pullup - simplifies interface to bidirectional μP reset pins without external resistors. |
| Package | SOT23-3 - industry-standard footprint compatible with DS181x-series layouts and automated PCB assembly. |
| Temperature Range | -40°C to +105°C - qualified for industrial and automotive under-hood applications requiring extended thermal stability. |
Pinout & Package
MXD1810UR41+T is housed in a 3-pin SOT23 package (outline U3-1), with 1.3mm × 2.9mm footprint, 0.95mm height, and lead(Pb)-free +T marking. Pin 1 is RESET (open-drain, active-low), Pin 2 is VCC (supply and threshold monitor input), and Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Drives low when VCC < 4.12V or during timeout; high-impedance otherwise; internal 5.5kΩ pullup to VCC enables shared bus use. |
| 2 - VCC | Power supply input and reset threshold reference | Supplies internal circuitry and serves as analog input to precision comparator; valid from +1.0V to +5.5V. |
| 3 - GND | Ground reference | Common return path for comparator, timer, and output stage; must be low-impedance for accurate threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.12V reset threshold | Factory-trimmed ±2.5% over full temperature range ensures consistent brownout detection in +5V systems without calibration. |
| No external components required | Integrated pullup resistor and comparator eliminate need for discrete resistors, capacitors, or voltage dividers - reducing BOM count and board area. |
| 100ms fixed reset timeout | Monostable timer guarantees minimum reset pulse width regardless of VCC ramp rate - prevents premature μP release during slow power-up. |
| 4μA ultra-low supply current | Enables always-on monitoring in battery-powered devices such as handheld test equipment and remote sensors with multi-year runtime. |
| VCC = +1V reset validity | Guaranteed RESET logic state integrity down to 1V supply allows safe shutdown sequencing in deep undervoltage conditions. |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power cycling and brownout events in factory-floor programmable logic controllers operating on unregulated 5V rails. IC Role / Device Role / Timing Role: Supervisory reset generator that asserts active-low RESET to halt CPU execution until stable +5V is confirmed. Use Value: Prevents corrupted firmware execution during line sags by enforcing 100ms reset hold time after VCC recovers above 4.12V. |
Use Scenario: Battery-backed vital-sign monitors requiring fail-safe restart after low-battery cutoff and recharge. IC Role / Device Role / Timing Role: Low-power reset supervisor monitoring main 5V supply derived from Li-ion battery management circuitry. Use Value: 4μA quiescent current extends standby time; 4.12V threshold aligns with 5V LDO dropout margin to avoid spurious resets. |
| Set-Top Box Power Management | Embedded Network Routers |
Use Scenario: Multi-rail power sequencing in consumer STBs where 5V rail powers baseband processors and memory subsystems. IC Role / Device Role / Timing Role: Dedicated +5V supervisor providing clean reset signal to ARM-based SoC during AC power interruption. Use Value: Open-drain output interfaces directly with SoC's bidirectional reset pin without external pullup, saving PCB space and cost. |
Use Scenario: Remote office routers deployed in unstable grid environments prone to brief outages and voltage sags. IC Role / Device Role / Timing Role: System-level reset initiator that holds network processor in reset until 5V rail stabilizes post-brownout. Use Value: Immunity to sub-100µs VCC transients prevents false resets during switching noise, improving system uptime and reliability. |
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 reset threshold, 140ms timeout, push-pull output, same SOT23-3 package | Requires external pullup for bidirectional reset use; higher threshold suits tighter 5V tolerance designs | Select when higher reset voltage margin or push-pull drive is needed; not drop-in due to output structure and timing difference |
| TPS3808G33DBVR | 3.3V threshold, adjustable delay (0–10s), enable input, 1.5μA ICC, SOT23-6 package | Designed for lower-voltage systems; requires PCB redesign due to 6-pin layout and different pinout | Choose for ultra-low-power 3.3V applications needing programmable delay; incompatible pinout precludes direct replacement |
Compared with MXD1810UR41+T, MAX809TRD3+T offers higher threshold and push-pull drive but lacks internal pullup for bidirectional interfaces, while TPS3808G33DBVR targets 3.3V systems with flexible timing but demands layout changes - neither is pin-compatible, and both require schematic revision for substitution.
Availability
MXD1810UR41+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, set-top box power management, and embedded network routers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1810UR41+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 computing markets.
The MXD1810–MXD1818 family was designed to deliver cost-effective, space-saving reset supervision for microprocessor-based systems operating at +2.5V, +3.0V, +3.3V, and +5V, with emphasis on low power, precision thresholds, and minimal external components.
FAQ
What is the exact reset threshold voltage of MXD1810UR41+T and how tightly is it specified?
The MXD1810UR41+T has a factory-set reset threshold of 4.12V, with a guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +105°C). This value is confirmed in the Electrical Characteristics table under "MXD181__ R41" entry, with min/typ/max values of 4.00V/4.12V/4.24V. The threshold is trimmed at wafer level and does not require external calibration.
Does MXD1810UR41+T support manual reset via an external pushbutton?
No, MXD1810UR41+T does not include manual-reset functionality. Only MXD1813 and MXD1818 variants feature debounced manual-reset detection on the RESET pin. The MXD1810UR41+T is a basic supervisor with power-on/power-down/brownout reset only - its RESET pin is output-only and lacks input sensing capability.
What is the function of the internal pullup resistor in MXD1810UR41+T and what value does it have?
The MXD1810UR41+T includes an internal 5.5kΩ pullup resistor connected between the open-drain RESET pin and VCC. This eliminates the need for an external pullup when interfacing with bidirectional μP reset inputs (e.g., Motorola 68HC11), enabling direct connection and reducing component count. The resistor value is specified in the Electrical Characteristics table under "Internal Pullup Resistor, Open-Drain".
Can MXD1810UR41+T operate reliably below 2.5V supply voltage?
Yes, MXD1810UR41+T is guaranteed to maintain valid RESET logic states down to VCC = +1.0V, as stated in Absolute Maximum Ratings and Electrical Characteristics. However, its intended application is +5V systems - the 4.12V threshold means it will assert reset continuously below that level, making it unsuitable for monitoring sub-4V rails.
Is MXD1810UR41+T pin-compatible with other devices in the MXD181x family?
Yes, all MXD181x devices in SOT23-3 (U-suffix) or SC70-3 (X-suffix) packages share identical pinouts: Pin 1 = RESET, Pin 2 = VCC, Pin 3 = GND. MXD1810UR41+T is pin-compatible with MXD1811UR41+T, MXD1812UR41+T, and MXD1813UR41+T - though functional differences (output type, manual reset) must be verified in circuit design.
MXD1810UR41+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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 Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MXD1810UR41+T FAQ
1.How can I place an order for MXD1810UR41+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1810UR41+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 MXD1810UR41+T reliable?
The price and inventory of MXD1810UR41+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1810UR41+T is usually 5 days.
3.What payment methods are accepted for MXD1810UR41+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1810UR41+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1810UR41+T?
MXD1810UR41+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1810UR41+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 MXD1810UR41+T?
For technical support, including MXD1810UR41+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1810UR41+T requirements.
6.How does Aetrix verify that MXD1810UR41+T is sourced from the original manufacturer or authorized distributors?
All MXD1810UR41+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 MXD1810UR41+T meets industry standards.
7.What is the process for return or replacement of MXD1810UR41+T?
All MXD1810UR41+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1810UR41+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 MXD1810UR41+T part is unused and in its original packaging.
Return procedure for MXD1810UR41+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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