My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MXD1817UR29
- Part No.:
- MXD1817UR29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MXD1817UR29.pdf
- Description:
- IC SUPERVISOR MICROPROCES RESET
- Quantity:
- Payment:
- Shipping:
Inventory:829
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MXD1817UR29 from Maxim Integrated is a precision microprocessor reset supervisor IC designed for +2.5V/+3.0V/+3.3V digital systems. It provides active-high push-pull RESET output, 2.88V factory-set reset threshold (±2.5% over temperature), 100ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It is used in portable battery-powered equipment to ensure reliable μP initialization during power-up, brownout, and manual reset events.
For engineers reviewing the MXD1817UR29 datasheet, MXD1817UR29 pinout, MXD1817UR29 application, or MXD1817UR29 equivalent, key selection criteria include its active-high push-pull output configuration, 2.88V threshold for 3.3V systems, 4μA supply current, -40°C to +105°C operating range, and SOT23-3 package compatibility with DS181x family designs.
Technical Context
The MXD1817UR29 integrates a precision voltage comparator with hysteresis, an internal timing capacitor, and a push-pull output stage. Its reset assertion is triggered when VCC falls below 2.88V, and reset remains asserted for ≥100ms after VCC rises above threshold - independent of VCC slew rate or transient immunity design.
Unlike open-drain variants, MXD1817UR29 drives RESET high actively during reset condition and low otherwise, eliminating need for external pullup. It shares pinout and functional behavior with MXD1812 but differs in reset threshold (2.88V vs. 4.12V/4.37V/4.62V options), enabling direct substitution in 3.3V systems requiring lower trip point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.88V ±2.5% over -40°C to +105°C - ensures reliable reset initiation for 3.3V systems with 10% margin below nominal rail. |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP internal state stabilization before release. |
| Supply Current | 4μA typical at +3.6V - enables multi-year battery life in always-on portable monitoring applications. |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET logic state even during deep brownout down to 1V VCC. |
| Output Type | Active-high push-pull - eliminates external pullup resistor and ensures fast, low-impedance RESET assertion. |
| Package | SOT23-3 - industry-standard 3-pin footprint compatible with automated PCB assembly and DS181x legacy designs. |
| Temperature Range | -40°C to +105°C - qualified for industrial and extended-temperature embedded control environments. |
Pinout & Package
MXD1817UR29 is housed in a 3-pin SOT23 package (outline U3-1), with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads. Pin 1 is RESET (active-high push-pull), Pin 2 is VCC (supply and threshold monitor input), and Pin 3 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output: driven high during reset assertion; pulled low when reset released - no external components required. |
| 2 | VCC | Primary supply input and reset-threshold reference source - monitors system rail directly without divider network. |
| 3 | GND | System ground reference for comparator, timer, and output stage - must be low-impedance connection to avoid false resets. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.88V threshold | ±2.5% accuracy over full temperature range - eliminates calibration overhead and ensures consistent trip point across production lots. |
| 100ms fixed reset timeout | Guaranteed minimum duration independent of VCC rise time - prevents premature μP release during slow power ramp-up. |
| Push-pull active-high RESET | Drives high-impedance μP reset pins directly without pullup - reduces BOM count and improves noise immunity vs. open-drain alternatives. |
| Low 4μA quiescent current | Enables use in energy-constrained applications such as coin-cell–powered sensors and wearables with multi-year runtime. |
| VCC = +1V operation guarantee | Ensures deterministic RESET logic state even during severe brownout - critical for fail-safe shutdown sequencing in safety-critical systems. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require reliable power-on reset and brownout recovery without external components. IC Role / Device Role / Timing Role: MXD1817UR29 acts as primary reset supervisor, asserting active-high RESET until stable 3.3V rail is confirmed and held for ≥100ms. Use Value: 4μA supply current extends single-CR2032 battery life beyond 5 years; 2.88V threshold matches 3.3V LDO dropout margin. |
Use Scenario: Modular PLC backplanes with distributed 3.3V supplies demand robust reset coordination across multiple controller cards. IC Role / Device Role / Timing Role: MXD1817UR29 provides synchronized, glitch-immune reset signaling to ARM-based microcontrollers during field power fluctuations. Use Value: ±2.5% threshold tolerance ensures consistent reset behavior across temperature extremes (-40°C to +105°C) in uncontrolled cabinet environments. |
| Smart Energy Meters | Automated Test Equipment (ATE) |
Use Scenario: Revenue-grade electricity meters operate continuously on backup capacitors during AC mains interruption. IC Role / Device Role / Timing Role: MXD1817UR29 monitors 3.3V auxiliary rail and asserts RESET if voltage sags below 2.88V, holding reset for ≥100ms post-recovery. Use Value: Valid RESET output down to VCC = +1V prevents undefined μP state during capacitor discharge decay - ensuring data integrity on power loss. |
Use Scenario: ATE mainframes require deterministic reset timing across hundreds of channel boards during self-test sequences. IC Role / Device Role / Timing Role: MXD1817UR29 delivers precise, repeatable 100ms reset hold time across all channels, eliminating software-timed delays. Use Value: SOT23-3 package enables dense layout on high-channel-count backplanes; pin compatibility with DS181x simplifies legacy board refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD29+T | 2.88V threshold, active-low open-drain RESET, 1.2μA ICC, SC70-3 package | Requires external pullup; incompatible with μP reset pins expecting active-high drive | Select only if system uses bidirectional reset pins or requires ultra-low current (<2μA) and can accommodate open-drain interface. |
| TPS3808G33DBVR | 3.3V threshold, active-low push-pull RESET, 16μA ICC, SOT23-5 package | Higher threshold unsuitable for 3.3V systems with tight LDO headroom; 5-pin package requires PCB redesign | Choose only if higher trip point is acceptable and additional enable/control pins justify larger footprint and higher quiescent current. |
Compared with MXD1817UR29, MAX809TRD29+T offers lower current but lacks active-high drive, while TPS3808G33DBVR provides tighter threshold tolerance but increases board area and power - making MXD1817UR29 optimal for space- and current-constrained 3.3V systems needing push-pull simplicity.
Availability
MXD1817UR29 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automated test equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MXD1817UR29 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 product line delivers ultra-low-power, precision reset supervision for microprocessor-based systems - engineered specifically for battery-operated, space-constrained, and thermally demanding embedded deployments.
FAQ
What is the reset threshold voltage of MXD1817UR29 and how is it trimmed?
The MXD1817UR29 has a factory-trimmed reset threshold of 2.88V, with ±2.5% accuracy guaranteed over the full -40°C to +105°C operating temperature range. This value is laser-trimmed during wafer sort and verified in final test; no external adjustment is needed. The "R29" suffix in MXD1817UR29 explicitly denotes this 2.88V threshold variant within the MXD1815–MXD1818 family for 2.5V/3.0V/3.3V systems.
Does MXD1817UR29 support manual reset functionality?
No, MXD1817UR29 does not include manual reset detection. That feature is exclusive to MXD1813 and MXD1818 variants, which have debounced active-low RESET inputs capable of triggering reset on a 1.5μs minimum low pulse. MXD1817UR29 is a dedicated power-supply monitor with automatic reset assertion only - ideal for applications where external push-button reset is handled separately or unnecessary.
What is the maximum supply voltage rating for MXD1817UR29?
MXD1817UR29 supports a supply voltage range of +1.0V to +5.5V. Its absolute maximum VCC rating is +6.0V, but continuous operation above +5.5V is not guaranteed. The device maintains valid RESET logic states down to VCC = +1.0V, and its internal comparator is designed to reject fast transients on VCC - making it suitable for noisy or unstable power environments common in industrial and portable applications.
Is MXD1817UR29 pin-compatible with other devices in the MXD181x family?
Yes, MXD1817UR29 is fully pin-compatible with all SOT23-packaged members of the MXD1810–MXD1818 family, including MXD1810URxx, MXD1812URxx, MXD1815URxx, and MXD1817URxx variants. All share identical 3-pin SOT23 pinout (RESET, VCC, GND), same footprint, and identical thermal and soldering profiles - enabling drop-in replacement for different reset thresholds or output configurations without PCB modification.
What package options are available for MXD1817UR29?
MXD1817UR29 is offered exclusively in the 3-pin SOT23 package (package code U3-1), with tape-and-reel delivery in 2500-unit increments. While the broader MXD181x family also includes SC70-3 variants (e.g., MXD1817XR29), the "U" in MXD1817UR29 explicitly denotes SOT23 packaging. Lead-free versions are available by specifying "+T" instead of "-T" in the order code.
MXD1817UR29 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.88V
- 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:
- SOT-23-3
MXD1817UR29 FAQ
1.How can I place an order for MXD1817UR29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1817UR29 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 MXD1817UR29 reliable?
The price and inventory of MXD1817UR29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1817UR29 is usually 5 days.
3.What payment methods are accepted for MXD1817UR29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1817UR29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1817UR29?
MXD1817UR29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1817UR29 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 MXD1817UR29?
For technical support, including MXD1817UR29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1817UR29 requirements.
6.How does Aetrix verify that MXD1817UR29 is sourced from the original manufacturer or authorized distributors?
All MXD1817UR29 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 MXD1817UR29 meets industry standards.
7.What is the process for return or replacement of MXD1817UR29?
All MXD1817UR29 units undergo pre-shipment inspection (PSI). If there is an issue with MXD1817UR29, 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 MXD1817UR29 part is unused and in its original packaging.
Return procedure for MXD1817UR29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1817UR29 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
