My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MXD1811XR44+
- Part No.:
- MXD1811XR44+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1811XR44+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,311
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MXD1811XR44+ from Maxim Integrated is a low-power, open-drain, active-low microprocessor reset supervisor IC designed for +5V systems. It monitors VCC and asserts RESET when supply voltage falls below 4.37V (±2.5%), maintains reset for ≥100ms after VCC recovery, and includes an internal 5.5kΩ pullup resistor. It operates from -40°C to +105°C in SC70-3 packaging and is used in portable equipment requiring reliable power-on reset.
For engineers reviewing the MXD1811XR44+ datasheet, MXD1811XR44+ pinout, MXD1811XR44+ application, or MXD1811XR44+ equivalent, key selection criteria include reset threshold accuracy (±2.5%), guaranteed RESET validity down to VCC = +1V, open-drain output compatibility with bidirectional μP reset pins, and immunity to fast VCC transients.
Technical Context
The MXD1811XR44+ implements a precision bandgap-based reset comparator with factory-trimmed 4.37V threshold (±2.5% over temperature), coupled to a fixed 100ms minimum timeout timer. Its open-drain RESET output interfaces directly with microcontrollers having bidirectional reset pins-no external pullup required due to integrated 5.5kΩ resistor.
It features transient immunity: negative-going VCC glitches shorter than ~20μs at 100mV overdrive do not trigger false resets. The device guarantees correct logic state for VCC as low as +1V and draws only 4μA typical supply current at +3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.37V ±2.5% - ensures reliable reset assertion before +5V system brownout affects μP operation |
| Reset Timeout Period | 100ms min - guarantees sufficient hold time for μP initialization during power-up or recovery |
| Supply Current | 4μA typ at +3.6V - enables use in battery-powered devices with multi-year standby life |
| Operating Temperature | -40°C to +105°C - supports industrial and extended-temperature embedded applications |
| Output Type | Open-drain, active-low - allows wired-OR configuration and direct interface with bidirectional μP reset pins |
| Internal Pullup | 5.5kΩ - eliminates need for external resistor while maintaining defined high state when RESET not asserted |
| VCC Validity Range | +1.0V to +5.5V - ensures predictable RESET behavior across full operational voltage range |
Pinout & Package
MXD1811XR44+ is housed in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 1.25mm × 0.9mm, suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Open-drain, active-low reset output; sinks current when asserted; pulled high via internal 5.5kΩ resistor to VCC when inactive |
| 2 (SC70) | VCC | Supply input and reset threshold monitoring node; accepts +1.0V to +5.5V; powers internal comparator and timer |
| 3 (SC70) | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 4.37V reset threshold | Eliminates external resistor network and calibration, reducing BOM count and layout area |
| ±2.5% threshold accuracy over temperature | Ensures consistent reset timing across -40°C to +105°C without derating or guard-banding |
| 4μA typical supply current | Extends battery life in portable instruments and remote sensors without compromising supervision reliability |
| Integrated 5.5kΩ pullup resistor | Enables direct connection to μPs with bidirectional reset pins (e.g., Motorola 68HC11) without external components |
| 100ms minimum reset timeout | Meets JEDEC JESD82-20 requirement for μP power-up stabilization time |
Applications
| Computers and Controllers | Intelligent Instruments |
|---|---|
Use Scenario: Power sequencing in industrial PLC controllers where stable reset is required after cold start or brownout. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to ARM Cortex-M4 core until +5V rail stabilizes above 4.37V for ≥100ms. Use Value: Prevents code execution errors by ensuring CPU remains held in reset until power integrity is confirmed. | Use Scenario: Battery-backed handheld multimeter with auto-power-down and wake-on-button functionality. IC Role / Device Role / Timing Role: Low-quiescent-current reset supervisor enabling reliable wake-up from deep sleep while minimizing standby drain. Use Value: Achieves <5μA total system standby current by leveraging 4μA ICC and eliminating external bias components. |
| Set-Top Boxes | Printers |
Use Scenario: Cold boot of digital TV tuner board after AC power restoration. IC Role / Device Role / Timing Role: Monitors main +5V DC/DC output and asserts RESET to SoC until voltage exceeds 4.37V and remains stable for 100ms. Use Value: Avoids firmware corruption by preventing premature SoC clock enable before power rail settling. | Use Scenario: Reset coordination between main controller and peripheral ASICs (e.g., print engine driver) during power-up. IC Role / Device Role / Timing Role: Single-point reset source with open-drain output enabling synchronized release across multiple downstream ICs. Use Value: Eliminates race conditions and metastability by guaranteeing simultaneous deassertion of RESET across heterogeneous logic domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR44+T | Same 4.37V threshold, SOT23-3 package, push-pull output (not open-drain) | Requires external pullup for bidirectional μP reset pins; incompatible with wired-OR configurations | Select when push-pull drive strength (>350μA) is needed and no manual reset or bidirectional interface is required |
| TPS3808G33DBVR | 3.3V threshold (not 4.37V); adjustable delay via capacitor; higher ICC (12μA typ) | Designed for +3.3V systems; lacks factory-trimmed precision and SC70 footprint | Select for designs needing programmable timeout or operating at 3.3V, but not as drop-in replacement for MXD1811XR44+ |
Compared with MAX809TR44+T and TPS3808G33DBVR, MXD1811XR44+ uniquely combines factory-trimmed 4.37V threshold, open-drain output with internal pullup, SC70-3 footprint, and 4μA quiescent current-making it optimal for compact +5V μP systems requiring minimal external components and bidirectional reset support.
Availability
MXD1811XR44+ is available at Aetrix Electronics and suitable for computers and controllers, intelligent instruments, and set-top boxes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1811XR44+ 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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MXD1810–MXD1818 family was developed to deliver ultra-low-power, factory-trimmed reset supervision in miniature packages for space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MXD1811XR44+ and how tightly is it specified?
The MXD1811XR44+ has a factory-set reset threshold of 4.37V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +105°C). This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix R44, and reflects nominal trim at +25°C with design-guaranteed drift. The MXD1811XR44+ does not require external calibration or adjustment.
Does MXD1811XR44+ support manual reset via an external pushbutton?
No, MXD1811XR44+ does not support debounced manual reset. That feature is exclusive to MXD1813/MXD1818 variants (e.g., MXD1813XR44+). The MXD1811XR44+ provides only power-supply monitoring and automatic reset assertion on VCC dropout; its RESET pin is output-only and not designed to accept external low-going pulses for manual initiation.
Can MXD1811XR44+ be used with microcontrollers that have bidirectional reset pins?
Yes, MXD1811XR44+ is specifically suited for this use case. Its open-drain, active-low RESET output interfaces directly with bidirectional μP reset pins (e.g., Motorola 68HC11) without external components-the internal 5.5kΩ pullup resistor ensures proper high-state termination. Either the μP or MXD1811XR44+ can assert reset, enabling flexible system-level control.
What is the maximum supply voltage rating and absolute minimum VCC for valid operation of MXD1811XR44+?
The MXD1811XR44+ operates over VCC = +1.0V to +5.5V. Absolute maximum VCC is +6.0V (per Absolute Maximum Ratings), and the device guarantees correct RESET/RESET logic state down to VCC = +1.0V. Below +1.0V, output behavior is not specified; for VCC = 0V applications, external pulldown/pullup is required per application note guidance-not applicable to MXD1811XR44+'s open-drain architecture.
Is MXD1811XR44+ pin-compatible with other members of the MXD181x family?
Yes, all MXD181x variants-including MXD1811XR44+-share identical 3-pin SC70 and SOT23 footprints and pin functions (VCC, GND, RESET). However, output type differs: MXD1811XR44+ is open-drain active-low, while MXD1812/MXD1817 are push-pull active-high. Swapping requires verifying reset polarity and drive capability in the target system.
MXD1811XR44+ 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:
- 4.37V
- Output:
- Open Drain or Open Collector
- 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
MXD1811XR44+ FAQ
1.How can I place an order for MXD1811XR44+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1811XR44+ 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 MXD1811XR44+ reliable?
The price and inventory of MXD1811XR44+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1811XR44+ is usually 5 days.
3.What payment methods are accepted for MXD1811XR44+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1811XR44+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1811XR44+?
MXD1811XR44+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1811XR44+ 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 MXD1811XR44+?
For technical support, including MXD1811XR44+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1811XR44+ requirements.
6.How does Aetrix verify that MXD1811XR44+ is sourced from the original manufacturer or authorized distributors?
All MXD1811XR44+ 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 MXD1811XR44+ meets industry standards.
7.What is the process for return or replacement of MXD1811XR44+?
All MXD1811XR44+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1811XR44+, 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 MXD1811XR44+ part is unused and in its original packaging.
Return procedure for MXD1811XR44+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1811XR44+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
