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Analog Devices Inc./Maxim Integrated MXD1810UR44+T
- Part No.:
- MXD1810UR44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MXD1810UR44+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:465
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Product details
Overview
MXD1810UR44+T from Maxim Integrated is a precision +5V microprocessor reset supervisor IC in SOT23-3 package, featuring active-low open-drain RESET output, 4.37V ±2.5% reset threshold, 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It monitors power supply integrity during power-up, brownout, and power-down in embedded controllers and portable systems.
For engineers reviewing the MXD1810UR44+T datasheet, MXD1810UR44+T pinout, MXD1810UR44+T application, or MXD1810UR44+T equivalent, key selection criteria include reset threshold accuracy, manual-reset debounce capability (not supported), open-drain drive strength, transient immunity, and compatibility with bidirectional μP reset pins requiring internal pullup.
Technical Context
The MXD1810UR44+T implements a precision voltage comparator with hysteresis-free threshold detection and an internal monostable timer for fixed 100ms reset assertion after VCC recovery. Its open-drain output includes a factory-trimmed 5.5kΩ internal pullup resistor, eliminating external components for standard interfacing.
Designed for +5V systems, it operates across -40°C to +105°C and rejects fast VCC transients up to 70µs at 100mV overdrive. Unlike MXD1813/MXD1818 variants, it lacks manual-reset debounce circuitry and push-button detect functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.37V ±2.5% - ensures reliable reset assertion before +5V system brownout affects logic stability |
| Reset Timeout | 100ms min - guarantees sufficient hold time for μP initialization and memory stabilization |
| Supply Current | 4µA typical at +3.6V - enables battery-powered operation for >10 years in low-duty-cycle monitoring |
| VCC Operating Range | +1.0V to +5.5V - supports valid RESET output even during deep brownout conditions |
| Output Type | Open-drain, active-low - interfaces directly with bidirectional μP reset pins without external pullup |
| Internal Pullup | 5.5kΩ - provides defined high state when RESET not asserted; eliminates external resistor |
| Temp Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1810UR44+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 finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOT23) | RESET | Active-low open-drain output; sinks current when asserted; pulled high via internal 5.5kΩ resistor to VCC |
| 2 (SOT23) | VCC | Main supply input and reset threshold reference; accepts +1.0V to +5.5V; powers internal comparator and timer |
| 3 (SOT23) | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reset Threshold | Factory-set 4.37V with ±2.5% tolerance over full temperature range ensures consistent brownout detection in +5V systems |
| No External Components | Integrated pullup resistor and comparator eliminate need for external resistors, capacitors, or diodes - reduces BOM count and PCB area |
| Low-Power Operation | 4µA typical supply current enables use in always-on battery-backed monitoring without significant drain |
| Transient Immunity | Rejects VCC glitches ≤70µs at 100mV overdrive - prevents spurious resets from switching noise or ESD-induced dips |
| Wide VCC Validity | Guaranteed RESET logic state down to VCC = +1V - maintains deterministic behavior during deep undervoltage events |
Applications
| Computers and Controllers | Intelligent Instruments |
|---|---|
Use Scenario: Monitoring +5V rail in industrial PLC CPU modules during mains fluctuation or backup battery switchover. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to ARM Cortex-M7 reset pin until stable +5V is confirmed. Use Value: Prevents firmware lockup or register corruption by enforcing 100ms minimum reset hold time after VCC recovery. | Use Scenario: Power supervision in handheld multimeters with LCD display and analog front-end powered from +5V DC-DC converter. IC Role / Device Role / Timing Role: Open-drain RESET output interfaces directly with bidirectional reset pin of MSP430F5xx MCU. Use Value: Internal 5.5kΩ pullup eliminates external component, reducing footprint and assembly cost in space-constrained designs. |
| Set-Top Boxes | Portable/Battery-Powered Equipment |
Use Scenario: Ensuring clean boot sequence in cable STB mainboard after AC power interruption or standby wake-up. IC Role / Device Role / Timing Role: Voltage monitor on primary +5V distribution rail; asserts reset if VCC drops below 4.37V during power sag. Use Value: ±2.5% threshold accuracy prevents premature reset during nominal ripple, improving system uptime. | Use Scenario: Supervising +5V supply derived from Li-ion battery pack in portable medical diagnostic device. IC Role / Device Role / Timing Role: Low-quiescent-current (4µA) supervisor maintaining reset assertion during battery voltage decay below 4.37V. Use Value: Enables graceful shutdown and data preservation before critical brownout, extending usable battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 4.63V reset threshold, same SOT23-3 package, 14µA max ICC, no internal pullup (requires external) | Suitable where higher threshold and lower temp drift (±1.5%) are prioritized over ultra-low current | Select when tighter threshold tolerance and legacy MAX809 footprint compatibility are required |
| TPS3808G33DBVR | 3.08V threshold, adjustable delay option, 1.6µA typical ICC, push-pull output, requires external pullup for open-drain emulation | Preferred for new designs needing programmable timeout or dual-voltage monitoring capability | Choose when system requires sub-2µA quiescent current or integration with TI's power management ecosystem |
Compared with MXD1810UR44+T, MAX809TRD3+T offers superior threshold accuracy but higher supply current and no internal pullup, while TPS3808G33DBVR delivers lower power and flexibility at the cost of threshold mismatch and added external components for open-drain emulation.
Availability
MXD1810UR44+T is available at Aetrix Electronics and suitable for industrial controllers, intelligent instrumentation, set-top boxes, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1810UR44+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–MXD1813 family targets cost-sensitive, space-constrained +5V microprocessor supervisory applications demanding precision reset thresholds, low power, and minimal external components.
FAQ
What is the exact reset threshold voltage of MXD1810UR44+T?
The MXD1810UR44+T has a factory-set reset threshold of 4.37V with ±2.5% tolerance over the full operating temperature range (-40°C to +105°C). This value is specified in the Electrical Characteristics table under "MXD181__ R44" condition and is trimmed during production to ensure accuracy without external calibration.
Does MXD1810UR44+T support manual reset via external pushbutton?
No, MXD1810UR44+T does not support manual reset or debounced pushbutton detection. That feature is exclusive to MXD1813 and MXD1818 variants. The MXD1810UR44+T provides only power-supply monitoring and automatic reset assertion based on VCC voltage level.
What is the function of the internal pullup resistor in MXD1810UR44+T?
The MXD1810UR44+T includes a factory-trimmed 5.5kΩ internal pullup resistor connected between the open-drain RESET pin and VCC. This ensures a defined logic-high state when RESET is not asserted, eliminating the need for an external pullup resistor in most interface configurations with microprocessors.
Can MXD1810UR44+T operate reliably below +2.5V supply?
Yes, MXD1810UR44+T is guaranteed to maintain correct RESET/RESET logic states down to VCC = +1.0V. However, its reset threshold remains fixed at 4.37V; therefore, it will assert reset whenever VCC falls below that level - making it unsuitable for sub-4V systems unless used solely for undervoltage lockout at 4.37V.
Is MXD1810UR44+T pin-compatible with other devices in the MXD181x family?
Yes, all MXD1810–MXD1813/MXD1815–MXD1818 devices share identical 3-pin SOT23 and SC70 footprints. MXD1810UR44+T is pin-compatible with MXD1811UR44+T, MXD1812UR44+T, and MXD1813UR44+T, though output type (open-drain vs. push-pull) and features (e.g., manual reset) differ per variant.
MXD1810UR44+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.37V
- 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
MXD1810UR44+T FAQ
1.How can I place an order for MXD1810UR44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1810UR44+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 MXD1810UR44+T reliable?
The price and inventory of MXD1810UR44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1810UR44+T is usually 5 days.
3.What payment methods are accepted for MXD1810UR44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1810UR44+T transactions.
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4.How is shipping managed for MXD1810UR44+T?
MXD1810UR44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1810UR44+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 MXD1810UR44+T?
For technical support, including MXD1810UR44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1810UR44+T requirements.
6.How does Aetrix verify that MXD1810UR44+T is sourced from the original manufacturer or authorized distributors?
All MXD1810UR44+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 MXD1810UR44+T meets industry standards.
7.What is the process for return or replacement of MXD1810UR44+T?
All MXD1810UR44+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1810UR44+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 MXD1810UR44+T part is unused and in its original packaging.
Return procedure for MXD1810UR44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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