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Analog Devices Inc./Maxim Integrated MXD1817XR23+
- Part No.:
- MXD1817XR23+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1817XR23+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,134
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Product details
Overview
MXD1817XR23+ from Maxim Integrated is a low-power microprocessor reset supervisor IC in SC70-3 package, designed for +2.5V/+3.0V/+3.3V systems with 2.31V factory-set reset threshold, active-high push-pull RESET output, 100ms minimum reset timeout, and operation down to VCC = +1V. It monitors supply voltage integrity during power-up, brownout, and power-down in portable embedded controllers.
For engineers reviewing the MXD1817XR23+ datasheet, MXD1817XR23+ pinout, MXD1817XR23+ application, or MXD1817XR23+ equivalent, key selection criteria include reset threshold accuracy (±2.5%), manual-reset debounce capability (absent in this variant), open-drain vs. push-pull output logic, VCC operating range (1.0V–5.5V), and compatibility with battery-powered μP systems requiring guaranteed reset assertion below 2.5V.
Technical Context
The MXD1817XR23+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.31V, triggering an active-high push-pull RESET signal that remains asserted for ≥100ms after VCC recovers above threshold. Its BiCMOS process enables 4μA typical supply current and immunity to fast transients up to 20µs at 100mV overdrive.
Unlike MXD1813/MXD1818 variants, MXD1817XR23+ lacks manual-reset input detection and debouncing circuitry. It guarantees valid RESET output down to VCC = +1V and supports bidirectional reset interfaces only when paired with external pullup/pulldown resistors - not internally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V ±2.5% over -40°C to +105°C - ensures reliable reset assertion before system-level undervoltage lockout in 2.5V/3.3V rails |
| Reset Timeout Period | 100ms minimum - provides sufficient hold time for μP initialization and clock stabilization after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and enables use in ultra-low-power wake-up monitoring |
| Supply Current | 4μA typical at +3.6V - minimizes quiescent drain in battery-backed or energy-harvesting applications |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives CMOS inputs directly without level-shifting |
| Operating Temperature | -40°C to +105°C - qualified for industrial and extended-temperature embedded environments |
| VCC Transient Immunity | Rejects negative-going glitches ≤20µs at 100mV overdrive - prevents spurious resets from switching noise or ESD coupling |
Pinout & Package
MXD1817XR23+ uses a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.95mm, suitable for high-density PCB layouts in space-constrained portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Active-high push-pull output - asserts logic HIGH during reset condition; sinks 10mA when deasserted, sources 350μA when asserted |
| 2 (SC70) | VCC | Power supply input and reset threshold reference - supplies internal comparator and bias circuitry; monitored for undervoltage events |
| 3 (SC70) | GND | Analog and digital ground reference - must be connected to system ground plane with low-impedance path to ensure accurate threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.31V ±2.5% over full temperature range - eliminates need for external trimming or calibration in production |
| No external components required | Self-contained reset generation with integrated comparator, timer, and push-pull driver - reduces BOM count and layout area |
| Ultra-low quiescent current | 4μA typical - extends battery life in always-on monitoring circuits such as smart sensors and wearables |
| Guaranteed reset validity to VCC = +1V | Ensures deterministic reset state even during severe brownout - critical for fail-safe shutdown in safety-critical subsystems |
| Transient-immune voltage monitoring | Rejects sub-20µs supply glitches - avoids false resets caused by DC-DC converter ripple or digital switching noise |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitor with ARM Cortex-M0+ MCU requiring reliable power-on reset and brownout recovery. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-high RESET to hold MCU in reset until stable 3.3V rail is established. Use Value: Prevents corrupted firmware execution during weak battery conditions by guaranteeing reset assertion down to VCC = +1V and rejecting transient-induced false triggers. |
Use Scenario: DIN-rail mounted analog input module operating in harsh factory environments with fluctuating 24VDC-derived 3.3V supplies. IC Role / Device Role / Timing Role: Primary voltage supervisor monitoring local 3.3V LDO output to initiate controlled restart after line sag or EMI-induced dip. Use Value: Enables deterministic system recovery with 100ms timeout aligned to watchdog timer window, reducing field failures due to marginal supply conditions. |
| Smart Home Hub Controllers | Automotive Body Control Units (BCU) |
Use Scenario: Wi-Fi-enabled home automation hub using a dual-core application processor powered from a 3.3V buck converter. IC Role / Device Role / Timing Role: Dedicated reset supervisor ensuring synchronized boot sequence across SoC, PMIC, and peripheral ICs. Use Value: Eliminates race conditions during cold start by providing precise 2.31V threshold matched to processor's minimum operating voltage specification. |
Use Scenario: Low-power CAN gateway node powered from vehicle battery via 3.3V LDO, subject to load-dump and cranking transients. IC Role / Device Role / Timing Role: Secondary reset monitor complementing main system supervisor for critical submodules like EEPROM write protection logic. Use Value: Provides independent brownout detection with ±2.5% threshold accuracy - improves functional safety compliance by decoupling reset timing from primary controller. |
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 | 2.93V reset threshold, SOT23-3, active-low open-drain output, no manual reset | Requires external pullup; suited for legacy 3.3V systems where active-low reset is standard | Select when interfacing with older μPs specifying active-low reset and higher threshold tolerance |
| TPS3808G125DBVR | 1.25V reset threshold, SOT23-6, adjustable via external resistor, 200ms timeout | Supports custom thresholds and longer timeouts but requires additional passive component | Choose when design requires programmable reset voltage or extended hold time beyond 100ms |
Compared with MXD1817XR23+, MAX809TRD3+T offers higher threshold and open-drain flexibility at the cost of external pullup dependency, while TPS3808G125DBVR trades fixed-threshold simplicity for configurability and longer timeout - making MXD1817XR23+ optimal for compact, cost-sensitive 2.3V–2.5V rail monitoring with minimal external parts.
Availability
MXD1817XR23+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1817XR23+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was designed to deliver low-cost, space-efficient reset supervision for battery-powered and embedded μP systems requiring precision voltage monitoring and robust transient immunity.
FAQ
What is the reset threshold voltage of the MXD1817XR23+?
The MXD1817XR23+ has a factory-trimmed reset threshold of 2.31V with ±2.5% accuracy over the full operating temperature range (-40°C to +105°C). This value is specified in the Reset Threshold Table and confirmed in the Electrical Characteristics section under VTH for suffix "R23". The device asserts its active-high RESET output when VCC falls below this threshold and holds it for ≥100ms after VCC rises above it. MXD1817XR23+ is optimized for 2.5V and 3.3V supply rails.
Does the MXD1817XR23+ support manual reset functionality?
No, the MXD1817XR23+ does not include manual reset detection or debouncing circuitry. That feature is exclusive to MXD1813 and MXD1818 variants (e.g., MXD1818XR23+). The MXD1817XR23+ provides only power-supply monitoring with automatic reset assertion on VCC drop. If external push-button reset is required, a discrete switch must be implemented upstream of the μP's reset input, separate from the MXD1817XR23+'s function.
What is the output configuration of the MXD1817XR23+ RESET pin?
The MXD1817XR23+ features an active-high push-pull RESET output. Pin 1 (RESET) drives HIGH during reset condition and LOW otherwise, eliminating the need for an external pullup resistor. This differs from open-drain variants like MXD1816XR23+, which require external pullups. The push-pull structure allows direct interface with CMOS inputs and supports sink currents up to 10mA when deasserted.
Can the MXD1817XR23+ operate reliably at VCC = +1.0V?
Yes, the MXD1817XR23+ is guaranteed to maintain correct RESET logic state down to VCC = +1.0V, as stated in the General Description and Absolute Maximum Ratings. Its internal comparator and output driver remain functional at this voltage, enabling fail-safe reset assertion during deep brownout. However, for VCC < +1.2V (minimum specified operating range), performance is not guaranteed per datasheet limits - design margin should account for this boundary.
What package type and footprint does the MXD1817XR23+ use?
The MXD1817XR23+ is supplied in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.95mm. It shares pin compatibility with SOT23-3 but has smaller dimensions and different thermal characteristics. The top marking "AIK" (per Table 1) identifies the MXD1817XR23+ variant. Footprint files are available from Maxim Integrated's package resource portal.
MXD1817XR23+ 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+ FAQ
1.How can I place an order for MXD1817XR23+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817XR23+ 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+ reliable?
The price and inventory of MXD1817XR23+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817XR23+ is usually 5 days.
3.What payment methods are accepted for MXD1817XR23+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817XR23+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817XR23+?
MXD1817XR23+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817XR23+ 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+?
For technical support, including MXD1817XR23+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817XR23+ requirements.
6.How does Aetrix verify that MXD1817XR23+ is sourced from the original manufacturer or authorized distributors?
All MXD1817XR23+ 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+ meets industry standards.
7.What is the process for return or replacement of MXD1817XR23+?
All MXD1817XR23+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817XR23+, 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+ part is unused and in its original packaging.
Return procedure for MXD1817XR23+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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