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Analog Devices Inc./Maxim Integrated MXD1816XR23
- Part No.:
- MXD1816XR23
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1816XR23.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MXD1816XR23 from Maxim Integrated is a low-power microprocessor reset supervisor IC with open-drain active-low RESET output, factory-trimmed 2.31V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, internal 5.5kΩ pullup resistor, and operation down to VCC = +1.0V. It monitors +2.5V/+3.0V/+3.3V power supplies in portable embedded systems requiring reliable brownout detection.
For engineers reviewing the MXD1816XR23 datasheet, MXD1816XR23 pinout, MXD1816XR23 application, or MXD1816XR23 equivalent, key selection criteria include its SC70-3 package, 4μA supply current, manual-reset compatibility with mechanical switches, transient immunity up to 100µs at 200mV overdrive, and guaranteed logic validity at VCC ≥ 1.0V.
Technical Context
The MXD1816XR23 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.31V, triggering an open-drain RESET assertion that remains active for ≥100ms after VCC recovers. Its internal 5.5kΩ pullup enables direct interface with bidirectional μP reset pins without external components.
Unlike push-pull variants, this device lacks manual-reset debounce circuitry (exclusive to MXD1813/MXD1818), and does not support valid RESET output below VCC = +1.0V-no pulldown/pullup compensation is specified for sub-1V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V ±2.5% over -40°C to +105°C - ensures reliable brownout detection for 2.5V/3.0V/3.3V systems |
| Reset Timeout Period | 100ms min - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions |
| Output Type | Open-drain, active-low with 5.5kΩ internal pullup - eliminates need for external pullup and simplifies μP interface |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for space-constrained PCB layouts |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1816XR23 is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208) with 0.65mm pitch and exposed pad not connected. Pin 1 is RESET (open-drain active-low), Pin 2 is VCC (supply and threshold monitor input), Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output; sinks current when asserted; pulled high internally to VCC via 5.5kΩ resistor |
| 2 | VCC | Power supply input and reset-threshold monitoring node; must be stable within ±2.5% of 2.31V for accurate detection |
| 3 | GND | Ground reference for comparator and output stage; requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 2.31V threshold | Eliminates external resistor networks and calibration effort for 2.5V/3.0V/3.3V systems |
| Internal 5.5kΩ pullup | Enables direct connection to bidirectional μP reset pins (e.g., Motorola 68HC11) without external components |
| 4μA supply current | Reduces quiescent power draw by >90% vs. legacy reset ICs, critical for battery-powered instrumentation |
| 100ms fixed timeout | Guarantees consistent reset hold time across voltage and temperature, avoiding timing-margin errors |
| VCC = +1.0V operation | Ensures deterministic reset behavior during severe brownout, preventing undefined μP states |
Applications
| Computers and Controllers | Intelligent Instruments |
|---|---|
Use Scenario: Monitoring 3.3V core supply in industrial PLC controllers during mains fluctuations. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to ARM Cortex-M4 reset pin upon VCC drop below 2.31V. Use Value: Prevents corrupted firmware execution during 10–50ms brownouts common in factory-floor power distribution. | Use Scenario: Power supervision in handheld multimeters powered by two AA cells (2.0–3.2V range). IC Role / Device Role / Timing Role: Open-drain RESET output directly tied to MSP430F5xx reset pin, leveraging internal pullup for zero-component interface. Use Value: Extends battery life by limiting quiescent current to 4μA while ensuring reliable startup at end-of-life cell voltage (~2.1V). |
| Set-Top Boxes | Portable/Battery-Powered Equipment |
Use Scenario: Reset coordination between main SoC and secondary video decoder ASIC during 3.3V rail instability. IC Role / Device Role / Timing Role: Single-supply reset supervisor providing synchronized reset pulse to both devices via shared open-drain bus. Use Value: Eliminates need for dual-output reset IC or discrete logic, reducing BOM count and layout area by 30%. | Use Scenario: Brownout protection in Bluetooth LE audio earbuds with Li-ion battery (2.7–4.2V) and 3.0V LDO output. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output; asserts RESET before battery sag causes DSP lockup or RF transmission errors. Use Value: Increases field reliability by preventing silent data corruption during 200–500ms voltage sags induced by RF transmit bursts. |
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 | 3-pin SOT23, 3.08V reset threshold, 140ms timeout, 1.5μA supply current | Higher threshold unsuitable for 2.5V systems; tighter tolerance (±1.5%) but no SC70 option | Select only if 3.08V threshold matches system VCC margin and SOT23 footprint is preferred |
| TPS3808G125DBVR | 6-pin SOT23, adjustable threshold via external resistor, 200ms timeout, 1.1μA supply current | Requires external resistor network; larger package; supports undervoltage lockout with delay adjustment | Choose when design requires programmable threshold or longer timeout, accepting added component count |
Compared with MXD1816XR23, MAX809TRD3-T offers lower quiescent current but mismatches the 2.31V threshold needed for tight 2.5V brownout margins, while TPS3808G125DBVR provides flexibility at the cost of layout area and BOM complexity-neither is pin-compatible or drop-in.
Availability
MXD1816XR23 is available at Aetrix Electronics and suitable for industrial controllers, portable instrumentation, set-top boxes, and battery-powered consumer electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1816XR23 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 computing applications, with emphasis on power efficiency and integration.
The MXD1810–MXD1818 family targets cost-sensitive, space-constrained embedded systems requiring ultra-low-power, single-supply reset supervision without external components.
FAQ
What is the exact reset threshold voltage of MXD1816XR23 and how tightly is it specified?
The MXD1816XR23 has a factory-set reset threshold of 2.31V, 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 "MXD181_ _ R23" row, where min/typ/max are 2.25V/2.31V/2.37V. The threshold applies specifically to the MXD1816 variant in the R23 suffix configuration and is trimmed during production using BiCMOS process technology.
Does MXD1816XR23 support manual reset functionality via the RESET pin?
No, MXD1816XR23 does not support debounced manual reset. Manual reset detection with 1.5μs minimum pulse width and 100ms timeout is exclusive to MXD1813 and MXD1818 variants per the Functional Diagram and Pin Descriptions sections. MXD1816XR23's RESET pin serves only as an open-drain output; driving it low externally will not trigger a reset event.
What package type and dimensions does MXD1816XR23 use, and is it RoHS-compliant?
MXD1816XR23 uses the 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm with 0.65mm lead pitch. Per the Package Information section, devices ordered with "-T" suffix are leaded, while "+T" denotes lead(Pb)-free RoHS-compliant versions. The SC70 package is explicitly listed in the Ordering Information table for MXD1816XR_ _-T/+T variants.
Can MXD1816XR23 operate reliably when VCC falls below 2.0V?
Yes, MXD1816XR23 is guaranteed to assert and maintain a valid RESET output down to VCC = +1.0V, as stated in the General Description and Absolute Maximum Ratings. However, below +1.0V, the device ceases functional operation and RESET becomes indeterminate. The 1.0V minimum is validated across -40°C to +105°C and is not dependent on external components.
How does the internal 5.5kΩ pullup resistor in MXD1816XR23 affect interfacing with microcontrollers?
The internal 5.5kΩ pullup resistor allows MXD1816XR23 to drive an active-high logic level on the RESET line when deasserted, enabling direct connection to bidirectional μP reset pins (e.g., Motorola 68HC11) without external components. This eliminates board space and BOM cost associated with discrete pullups, while ensuring sufficient sink current (10mA min) when RESET is asserted low per the Electrical Characteristics table.
MXD1816XR23 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.31V
- 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
MXD1816XR23 FAQ
1.How can I place an order for MXD1816XR23 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1816XR23 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 MXD1816XR23 reliable?
The price and inventory of MXD1816XR23 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1816XR23 is usually 5 days.
3.What payment methods are accepted for MXD1816XR23?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1816XR23 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1816XR23?
MXD1816XR23 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1816XR23 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 MXD1816XR23?
For technical support, including MXD1816XR23 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1816XR23 requirements.
6.How does Aetrix verify that MXD1816XR23 is sourced from the original manufacturer or authorized distributors?
All MXD1816XR23 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 MXD1816XR23 meets industry standards.
7.What is the process for return or replacement of MXD1816XR23?
All MXD1816XR23 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1816XR23, 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 MXD1816XR23 part is unused and in its original packaging.
Return procedure for MXD1816XR23:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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