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Analog Devices Inc./Maxim Integrated MXD1813XR44+T
- Part No.:
- MXD1813XR44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1813XR44+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
MXD1813XR44+T from Maxim Integrated is a low-power, open-drain, active-low microprocessor reset supervisor IC for +5V systems, featuring factory-set 4.37V reset threshold, 100ms minimum reset timeout, and debounced manual-reset detection (1.5μs trigger). It monitors VCC supply integrity and asserts RESET during power-up, brownout, or push-button events in embedded controllers and portable equipment.
For engineers reviewing the MXD1813XR44+T datasheet, MXD1813XR44+T pinout, MXD1813XR44+T application, or MXD1813XR44+T equivalent, key selection criteria include its SC70-3 package, guaranteed RESET validity down to VCC = +1V, ±2.5% threshold accuracy over temperature, internal 5.5kΩ pullup resistor, and immunity to sub-10μs VCC transients at 4.37V threshold.
Technical Context
The MXD1813XR44+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 4.37V (±2.5% over −40°C to +105°C), triggering an internal timer that holds RESET low for ≥100ms after VCC recovery. Its manual-reset input accepts logic-low pulses ≥1.5μs on the RESET pin to initiate a second independent 100ms reset timeout.
This device uses BiCMOS process technology and features open-drain output with integrated 5.5kΩ pullup to VCC, enabling direct interface with bidirectional μP reset pins without external components. It guarantees functional operation from VCC = +1.2V to +5.5V and exhibits transient immunity up to 10μs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.37V ±2.5% - precise brownout detection point for +5V systems, stable across −40°C to +105°C |
| Reset Timeout Period | 100ms min - ensures sufficient processor initialization time after power recovery or manual reset |
| Supply Current | 4μA typical at +3.6V - enables battery-powered operation with negligible quiescent drain |
| VCC Operating Range | +1.2V to +5.5V - supports valid RESET assertion even during deep undervoltage conditions |
| Manual Reset Trigger | 1.5μs minimum low pulse on RESET pin - robust debounce against mechanical switch bounce |
| Output Type | Open-drain active-low with 5.5kΩ internal pullup - eliminates need for external pullup and simplifies μP interface |
| Transient Immunity | Rejects ≤10μs negative VCC glitches at 100mV overdrive - prevents false resets in noisy environments |
Pinout & Package
MXD1813XR44+T is housed in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.9mm, suitable for space-constrained portable designs and reflow-compatible with standard SMT processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) / 2 (SOT23) | RESET | Open-drain active-low reset output with internal 5.5kΩ pullup to VCC; accepts manual reset trigger when pulled low ≥1.5μs |
| 2 (SC70) / 1 (SOT23) | VCC | Supply voltage input and reset threshold monitoring node; operates from +1.2V to +5.5V |
| 3 | GND | Ground reference for comparator, timer, and output stage; must be low-impedance for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.37V reset threshold | ±2.5% accuracy over full temperature range eliminates calibration and reduces BOM count |
| Debounced manual-reset input | 1.5μs minimum low pulse triggers 100ms reset - replaces external RC debounce networks and switch hardware |
| Internal 5.5kΩ pullup resistor | Enables direct connection to bidirectional μP reset pins (e.g., Motorola 68HC11) without external components |
| Guaranteed RESET validity to VCC = +1V | Ensures deterministic reset state during deep brownout, critical for fail-safe system behavior |
| 4μA typical supply current | Extends battery life in portable instrumentation and handheld devices without sacrificing supervision reliability |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Monitoring 5V power rails in PLC I/O modules subject to line fluctuations and EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M4 microcontroller during brownout. Use Value: Prevents corrupted firmware execution by enforcing 100ms minimum reset hold time after VCC recovery. |
Use Scenario: Power sequencing and fault recovery in battery-powered glucose meters with LCD and sensor interfaces. IC Role / Device Role / Timing Role: Voltage monitor and manual reset initiator via tactile button press. Use Value: Debounced 1.5μs trigger ensures single, clean reset event despite mechanical switch bounce, avoiding repeated reboots. |
| Set-Top Box Power Management | Network Edge Router Modules |
Use Scenario: Ensuring reliable boot sequence in consumer STBs powered from switched-mode 5V supplies. IC Role / Device Role / Timing Role: Active-low reset generator synchronized to 5V rail stabilization. Use Value: 4.37V threshold precisely targets nominal 5V ±5% tolerance, rejecting harmless ripple while catching true brownouts. |
Use Scenario: Supervising auxiliary 5V domains in multi-rail telecom boards where layout space is constrained. IC Role / Device Role / Timing Role: Compact SC70 reset supervisor interfacing with FPGA configuration logic. Use Value: 2.0mm × 2.1mm footprint saves PCB area versus SOT23; open-drain output allows wired-OR with other reset sources. |
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, no manual reset, SOT23-3 only | Lacks debounced push-button functionality; suited for simple power-on reset only | Select when manual reset is unnecessary and higher threshold tolerance is acceptable |
| TPS3808G33DBVR | 3.3V threshold, adjustable delay (0–10s), 1.5μA IQ, SOT23-6 | Requires external capacitor for timing; supports lower-voltage systems but not +5V optimized | Choose for ultra-low-power 3.3V applications needing programmable timeout, not fixed 100ms |
Compared with MXD1813XR44+T, MAX809TRD3+T offers simpler architecture but omits manual reset capability, while TPS3808G33DBVR provides flexibility and lower IQ at the cost of larger package and voltage mismatch for +5V use - MXD1813XR44+T uniquely balances precision 4.37V detection, SC70 size, and integrated debounced manual reset in a single 3-pin solution.
Availability
MXD1813XR44+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, set-top boxes, and network edge modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1813XR44+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 high-performance analog and mixed-signal semiconductor solutions for industrial, communications, and consumer markets.
The MXD1813XR44+T belongs to the MXD1810–MXD1818 family of micropower reset supervisors, engineered specifically for reliable power-monitoring in space- and power-constrained +5V embedded systems.
FAQ
What is the exact reset threshold voltage of the MXD1813XR44+T?
The MXD1813XR44+T has a factory-set reset threshold of 4.37V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −40°C to +105°C. This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix R44, and applies specifically to the MXD1813 variant within the MXD1810–MXD1813 series intended for +5V systems.
Does the MXD1813XR44+T support manual reset, and how does it work?
Yes, the MXD1813XR44+T supports debounced manual reset: pulling the RESET pin low for ≥1.5μs triggers a dedicated 100ms minimum reset timeout, independent of VCC monitoring. This feature is exclusive to MXD1813/MXD1818 variants and enables clean, bounce-free reset initiation using mechanical switches without external circuitry.
What package type and dimensions does the MXD1813XR44+T use?
The MXD1813XR44+T is supplied in a 3-pin SC70 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.9mm. Its top marking is "AIA", per Table 1 in the datasheet, and it is lead(Pb)-free, indicated by the "+T" suffix in the part number.
Can the MXD1813XR44+T operate reliably below 2.5V supply voltage?
Yes - the MXD1813XR44+T is fully specified from VCC = +1.2V to +5.5V and guarantees valid RESET/RESET output states down to +1V. Its internal comparator and timer remain functional at low VCC, ensuring deterministic reset behavior during deep brownout conditions common in battery-depleted systems.
Is an external pullup resistor required for the RESET output of the MXD1813XR44+T?
No - the MXD1813XR44+T integrates a 5.5kΩ pullup resistor to VCC on its open-drain RESET output, eliminating the need for external components. This design enables direct connection to bidirectional microprocessor reset pins (e.g., Motorola 68HC11) and supports wired-OR configurations with other reset sources.
MXD1813XR44+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:
- 4.37V
- 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
MXD1813XR44+T FAQ
1.How can I place an order for MXD1813XR44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1813XR44+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 MXD1813XR44+T reliable?
The price and inventory of MXD1813XR44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1813XR44+T is usually 5 days.
3.What payment methods are accepted for MXD1813XR44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1813XR44+T transactions.
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4.How is shipping managed for MXD1813XR44+T?
MXD1813XR44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1813XR44+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 MXD1813XR44+T?
For technical support, including MXD1813XR44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1813XR44+T requirements.
6.How does Aetrix verify that MXD1813XR44+T is sourced from the original manufacturer or authorized distributors?
All MXD1813XR44+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 MXD1813XR44+T meets industry standards.
7.What is the process for return or replacement of MXD1813XR44+T?
All MXD1813XR44+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1813XR44+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 MXD1813XR44+T part is unused and in its original packaging.
Return procedure for MXD1813XR44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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