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Analog Devices Inc./Maxim Integrated MXD1811XR41+T
- Part No.:
- MXD1811XR41+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1811XR41+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,281
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Product details
Overview
MXD1811XR41+T from Maxim Integrated is an open-drain, active-low microprocessor reset supervisor IC designed for +5V systems, featuring a factory-set 4.12V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and internal 5.5kΩ pullup resistor. It monitors VCC supply integrity and asserts RESET during brownout, power-up, or power-down events in embedded controllers and portable equipment.
For engineers reviewing the MXD1811XR41+T datasheet, MXD1811XR41+T pinout, MXD1811XR41+T application, or MXD1811XR41+T equivalent, key selection criteria include its SC70-3 package, 4μA quiescent current, guaranteed RESET validity down to VCC = +1V, immunity to fast VCC transients, and compatibility with bidirectional μP reset pins without external pullups.
Technical Context
The MXD1811XR41+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 4.12V, triggering an open-drain RESET output that remains low for ≥100ms after VCC recovers. Its internal pullup eliminates need for external components when interfacing with CMOS inputs.
Unlike push-pull variants, this device lacks manual-reset debounce logic (exclusive to MXD1813/MXD1818) and does not support external pushbutton assertion-its RESET pin serves only as output. It operates across -40°C to +105°C and maintains functional reset behavior down to VCC = +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.12V ±2.5% - precise brownout detection point for +5V systems |
| Reset Timeout Period | 100ms min - ensures μP completes full initialization before release |
| Supply Current | 4μA typical at +3.6V - enables use in battery-powered applications |
| Operating Voltage Range | +1.0V to +5.5V - guarantees valid RESET output even during deep brownout |
| Output Type | Open-drain, active-low - supports wired-OR configurations and bidirectional μP reset pins |
| Internal Pullup | 5.5kΩ - eliminates external resistor for standard CMOS load interfaces |
| Package | SC70-3 - 1.25mm × 1.65mm footprint for space-constrained PCBs |
Pinout & Package
MXD1811XR41+T is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 1.25mm × 1.65mm × 0.95mm with 0.65mm lead pitch. The package is RoHS-compliant (lead-free, indicated by "+T" suffix) and rated for -40°C to +105°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Open-drain active-low output | Drives low during reset; floats high via internal 5.5kΩ pullup to VCC when inactive |
| 2 (VCC) | Power supply input & threshold reference | Monitors system supply; powers internal circuitry and sets comparator reference |
| 3 (GND) | Ground reference | Provides return path for internal current sources and comparator biasing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.12V with ±2.5% accuracy over full temperature range ensures reliable brownout detection without calibration |
| No external components required | Integrated 5.5kΩ pullup resistor and precision comparator eliminate BOM count and layout complexity |
| Low-power operation | 4μA typical supply current extends battery life in portable instrumentation and handheld devices |
| VCC transient immunity | Rejects negative-going glitches <1.5μs at 4.12V overdrive, preventing spurious resets in noisy environments |
| Guaranteed RESET validity to VCC = +1V | Maintains defined logic state during deep undervoltage, avoiding indeterminate μP behavior |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Monitoring 5V rail in PLC I/O modules subject to field-induced transients and thermal cycling. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring deterministic μP restart after brownout or ESD-induced supply dip. Use Value: 100ms timeout prevents premature firmware execution; ±2.5% threshold stability avoids false triggers across -40°C to +105°C. | Use Scenario: Power sequencing in handheld glucose meters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Active-low reset supervisor asserting during battery discharge below 4.12V and holding reset for ≥100ms on recharge. Use Value: 4μA quiescent current minimizes standby drain; SC70-3 footprint fits compact PCB layouts. |
| Set-Top Box Power Management | Network Edge Router Control Plane |
Use Scenario: Ensuring clean boot of ARM-based SoC after AC adapter reconnection or hot-swap events. IC Role / Device Role / Timing Role: Open-drain RESET output enabling shared reset bus with other peripherals and SoC. Use Value: Internal pullup removes need for external resistor; 5.5V absolute max rating tolerates 5V rail overshoot. | Use Scenario: Reset coordination between dual-core control processors in carrier-grade routers with redundant 5V supplies. IC Role / Device Role / Timing Role: Independent VCC monitoring per supply domain, driving common reset tree via wired-OR topology. Use Value: Open-drain architecture allows multiple MXD1811XR41+T devices to share single RESET line without contention. |
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, SOT23-3 package, 1.6μA supply current | Higher threshold suits 5V systems requiring tighter margin above nominal rail | Select when 4.63V trip point better matches system tolerance stack-up than 4.12V |
| TPS3808G33DBVR | 3.08V threshold, adjustable delay option, 1.5μA supply current, same SC70-3 footprint | Lower threshold targets 3.3V domains; delay programmability adds flexibility | Choose for 3.3V systems or where configurable timeout is required beyond fixed 100ms |
Compared with MXD1811XR41+T, MAX809TRD3+T offers higher reset voltage and lower current but lacks internal pullup for open-drain operation, while TPS3808G33DBVR targets different voltage domains and provides timing adjustability-neither is pin-compatible, and both require layout review for interface compatibility.
Availability
MXD1811XR41+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, set-top boxes, and network edge routers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1811XR41+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) designs precision analog and mixed-signal ICs for industrial, communications, and consumer applications, emphasizing reliability, low power, and small form factors.
The MXD1810–MXD1818 family was engineered specifically for cost-sensitive, space-constrained microprocessor supervisory functions in portable and embedded systems operating from 2.5V to 5V rails.
FAQ
What is the reset threshold voltage of the MXD1811XR41+T and how accurate is it over temperature?
The MXD1811XR41+T has a factory-set reset threshold of 4.12V with ±2.5% accuracy over the full operating temperature range (-40°C to +105°C). This specification ensures consistent brownout detection across environmental extremes without requiring external calibration or trimming. The value is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix R41.
Does the MXD1811XR41+T support manual reset functionality via its RESET pin?
No, the MXD1811XR41+T does not support manual reset detection. That feature is exclusive to the MXD1813 and MXD1818 variants, which include internal debouncing circuitry triggered by a >1.5μs low pulse on the RESET pin. For MXD1811XR41+T, the RESET pin is output-only and cannot be used to initiate reset externally.
What package type and dimensions does the MXD1811XR41+T use?
The MXD1811XR41+T uses a 3-pin SC70 package (outline X3-2), measuring 1.25mm × 1.65mm × 0.95mm with 0.65mm lead pitch. It is lead-free (RoHS-compliant), indicated by the "+T" suffix, and shares footprint compatibility with other SC70-3 reset supervisors like the MAX809 series.
Can the MXD1811XR41+T drive a microcontroller with a bidirectional reset pin?
Yes, the MXD1811XR41+T's open-drain, active-low RESET output is ideal for interfacing with bidirectional μP reset pins (e.g., Motorola 68HC11). Its internal 5.5kΩ pullup resistor eliminates the need for an external pullup, allowing either the supervisor or the μP to assert reset on the shared line without contention or additional components.
What is the minimum supply voltage at which MXD1811XR41+T guarantees valid RESET output logic states?
The MXD1811XR41+T guarantees correct RESET/RESET logic states down to VCC = +1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during deep brownout conditions where many competing supervisors fail to maintain defined output levels.
MXD1811XR41+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:
- 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
MXD1811XR41+T FAQ
1.How can I place an order for MXD1811XR41+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1811XR41+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 MXD1811XR41+T reliable?
The price and inventory of MXD1811XR41+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1811XR41+T is usually 5 days.
3.What payment methods are accepted for MXD1811XR41+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1811XR41+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1811XR41+T?
MXD1811XR41+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1811XR41+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 MXD1811XR41+T?
For technical support, including MXD1811XR41+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1811XR41+T requirements.
6.How does Aetrix verify that MXD1811XR41+T is sourced from the original manufacturer or authorized distributors?
All MXD1811XR41+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 MXD1811XR41+T meets industry standards.
7.What is the process for return or replacement of MXD1811XR41+T?
All MXD1811XR41+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1811XR41+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 MXD1811XR41+T part is unused and in its original packaging.
Return procedure for MXD1811XR41+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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