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Analog Devices Inc./Maxim Integrated MXD1817XR23+T
- Part No.:
- MXD1817XR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
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Product details
Overview
MXD1817XR23+T from Maxim Integrated is a low-power microprocessor reset supervisor IC in SC70-3 package, featuring active-high push-pull RESET output, factory-set 2.31V reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and operation down to VCC = +1V. It monitors +2.5V/+3.0V/+3.3V power rails in portable embedded systems requiring reliable brownout detection without external components.
For engineers reviewing the MXD1817XR23+T datasheet, MXD1817XR23+T pinout, MXD1817XR23+T application, or MXD1817XR23+T equivalent, key selection criteria include reset threshold accuracy, active-high output drive capability, manual-reset immunity (not supported), supply current at 3.6V (4µA typ), and guaranteed logic validity below 1.2V VCC.
Technical Context
The MXD1817XR23+T implements a precision bandgap-based voltage comparator with hysteresis to monitor VCC against a trimmed 2.31V threshold, asserting RESET high when VCC falls below that level. Its internal timer guarantees ≥100ms reset assertion after VCC recovers, independent of VCC slew rate.
This device belongs to the MXD1815–MXD1818 subfamily for 2.5V/3.0V/3.3V systems and uses BiCMOS process technology. Unlike MXD1813/MXD1818, it lacks manual-reset debounce circuitry and open-drain configuration - its push-pull active-high output drives directly into CMOS inputs without pullup resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V ±2.5% over -40°C to +105°C - ensures reliable detection of 2.5V/3.3V rail brownouts with minimal false triggers |
| Reset Timeout Period | 100ms minimum - holds processor in reset long enough for stable power recovery before code execution resumes |
| Supply Current | 4µA typical at VCC = +3.6V - enables multi-year battery life in portable equipment |
| VCC Operating Range | +1.2V to +5.5V - supports valid RESET output down to near-undervoltage conditions (guaranteed to +1V) |
| Output Type | Active-high push-pull - eliminates need for external pullup, simplifies interface to µP reset inputs requiring high-active assertion |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for space-constrained portable designs |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MXD1817XR23+T is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), with pin 1 as RESET (active-high push-pull), pin 2 as VCC (supply and threshold monitor input), and pin 3 as GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output - asserts high during reset condition; sinks 10mA when low, sources 350µA when high |
| 2 | VCC | Power supply input and reset threshold reference - also serves as comparator input for monitoring supply voltage |
| 3 | GND | Analog and digital ground reference - must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.31V reset threshold | Factory-trimmed ±2.5% over full temperature range - eliminates calibration overhead in production |
| Active-high push-pull RESET | No external pullup required - reduces BOM count and PCB area vs. open-drain alternatives |
| 100ms fixed reset timeout | Internally timed, independent of VCC ramp rate - ensures consistent reset hold time across varying power-up profiles |
| Low 4µA supply current | Enables use in always-on battery-backed subsystems without compromising runtime |
| VCC = +1V logic validity guarantee | Ensures RESET remains well-defined even during deep brownout - prevents metastability in downstream logic |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered wearable ECG sensor operating from a 3.3V LDO with intermittent wake/sleep cycles. IC Role / Device Role / Timing Role: Supervises 3.3V rail and asserts active-high RESET to ARM Cortex-M0 MCU on brownout, holding reset for ≥100ms until stable. Use Value: Prevents corrupted memory writes or flash programming during undervoltage by guaranteeing reset assertion down to VCC = +1V with no external components. |
Use Scenario: DIN-rail mounted I/O expansion module powered from 24V DC-DC converted to 3.3V, exposed to industrial transients. IC Role / Device Role / Timing Role: Monitors 3.3V logic supply and generates clean, glitch-immune reset signal to FPGA configuration controller. Use Value: Immunity to fast VCC transients (≤2µs at 200mV overdrive) avoids spurious resets in electrically noisy factory environments. |
| Smart Energy Meters | Wireless IoT Edge Nodes |
Use Scenario: ANSI C12.22-compliant electricity meter with dual-supply architecture (3.3V MCU + 1.8V RF SoC). IC Role / Device Role / Timing Role: Resets main application MCU upon 3.3V rail collapse; operates over full -40°C to +105°C range for outdoor deployment. Use Value: SC70-3 footprint saves board space in tightly packed meter PCBs while maintaining AEC-Q200-equivalent thermal robustness. |
Use Scenario: LoRaWAN node powered by coin cell, waking every 15 minutes to sample environmental sensors and transmit. IC Role / Device Role / Timing Role: Ensures deterministic boot state after cold start or brownout by asserting RESET high until 3.3V rail stabilizes for ≥100ms. Use Value: 4µA typical ICC extends 10-year battery life target; active-high output interfaces directly to ultra-low-power MCU reset pin without leakage concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.93V reset threshold, SOT23-3, active-low open-drain output with 5.5kΩ internal pullup | Requires external pullup for active-high logic; higher threshold unsuitable for 2.5V/3.3V brownout detection | Select only if system requires active-low reset signaling and 2.93V trip point matches design margin |
| TPS3808G125DBVR | 1.25V threshold, adjustable via external resistor divider, 200ms timeout, SOT23-6 | Higher pin count, programmable threshold, but larger footprint and higher quiescent current (1.1µA min) | Choose when precise custom threshold tuning or longer timeout is needed; not drop-in compatible |
Compared with MXD1817XR23+T, MAX809TRD2+T offers different polarity and threshold but shares SC70/SOT23 compatibility, while TPS3808G125DBVR provides flexibility at cost of size and complexity - MXD1817XR23+T delivers optimized 2.31V detection in minimal 3-pin form factor.
Availability
MXD1817XR23+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and wireless IoT edge nodes requiring stable component supply with lead-free compliance and extended temperature support.
Supply support for MXD1817XR23+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, computing, and communications applications, emphasizing low power, small size, and high reliability.
The MXD1815–MXD1818 product line targets cost-sensitive, space-constrained embedded systems needing factory-trimmed reset supervision for 2.5V/3.0V/3.3V rails - MXD1817XR23+T specifically serves designs requiring active-high push-pull output and 2.31V threshold.
FAQ
What is the exact reset threshold voltage of MXD1817XR23+T and how tightly is it specified?
The MXD1817XR23+T has a factory-set reset threshold of 2.31V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-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 specification ensures reliable detection of 3.3V rail brownouts while avoiding false triggers from noise or ripple.
Does MXD1817XR23+T support manual reset functionality via the RESET pin?
No, MXD1817XR23+T does not support manual reset. Only MXD1813 and MXD1818 variants include debounced manual-reset detection (requiring >1.5µs low pulse on RESET). MXD1817XR23+T's RESET pin is an active-high push-pull output only - applying external signals to it may damage the device or cause undefined behavior. Its function is strictly supervisory, not interactive.
What is the maximum supply voltage and minimum operating VCC for MXD1817XR23+T?
MXD1817XR23+T operates from VCC = +1.2V to +5.5V over temperature, with absolute maximum rating of +6.0V. Critically, its RESET output remains logically valid down to VCC = +1.0V - a key feature verified in the Absolute Maximum Ratings and Electrical Characteristics sections. This ensures deterministic reset behavior during deep brownout conditions common in battery-powered systems.
How does the active-high push-pull output of MXD1817XR23+T differ from open-drain alternatives in system design?
The active-high push-pull output of MXD1817XR23+T eliminates the need for an external pullup resistor, reducing BOM count and PCB area. It sources up to 350µA when high and sinks 10mA when low - enabling direct connection to standard CMOS reset inputs without signal integrity concerns. In contrast, open-drain variants like MXD1816 require a pullup and cannot actively drive high, limiting interface flexibility.
Is MXD1817XR23+T pin-compatible with other devices in the MXD181x family?
Yes, MXD1817XR23+T is pin-compatible across all MXD1810–MXD1818 variants in the same package type: SC70-3 (pin 1 = RESET, pin 2 = VCC, pin 3 = GND). However, output polarity (active-high vs. active-low), reset threshold, and manual-reset capability differ between variants - electrical compatibility requires verifying matching output type and threshold in the target application before substitution.
MXD1817XR23+T 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:
- 2.31V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MXD1817XR23+T FAQ
1.How can I place an order for MXD1817XR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR23+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 MXD1817XR23+T reliable?
The price and inventory of MXD1817XR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR23+T is usually 5 days.
3.What payment methods are accepted for MXD1817XR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR23+T?
MXD1817XR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR23+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 MXD1817XR23+T?
For technical support, including MXD1817XR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR23+T requirements.
6.How does Aetrix verify that MXD1817XR23+T is sourced from the original manufacturer or authorized distributors?
All MXD1817XR23+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 MXD1817XR23+T meets industry standards.
7.What is the process for return or replacement of MXD1817XR23+T?
All MXD1817XR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR23+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 MXD1817XR23+T part is unused and in its original packaging.
Return procedure for MXD1817XR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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