My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MXD1816UR22+
- Part No.:
- MXD1816UR22+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MXD1816UR22+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,432
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MXD1816UR22+ from Maxim Integrated is a low-power microprocessor reset supervisor IC in SOT23-3 package, monitoring +2.5V/+3.0V/+3.3V supplies with 2.18V factory-set reset threshold, 100ms minimum reset timeout, open-drain active-low RESET output, and internal 5.5kΩ pullup resistor-used for reliable power-on reset in portable microcontroller systems.
For engineers reviewing the MXD1816UR22+ datasheet, MXD1816UR22+ pinout, MXD1816UR22+ application, or MXD1816UR22+ equivalent, key selection criteria include reset threshold accuracy (±2.5%), VCC operating range down to +1.2V, guaranteed RESET validity to VCC = +1V, transient immunity, and compatibility with bidirectional μP reset pins without external components.
Technical Context
The MXD1816UR22+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.18V, triggering an open-drain active-low RESET assertion. Its internal timer ensures reset remains asserted for ≥100ms after VCC recovers above threshold.
Designed for 2.5V/3.0V/3.3V systems, it features no external components, 4μA typical supply current at +3.6V, and operates across –40°C to +105°C. It lacks manual-reset debouncing (exclusive to MXD1813/MXD1818), and its RESET pin serves only as output-not input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.18V ±2.5% - sets precise brownout detection point for +2.5V/+3.3V rails |
| Reset Timeout Period | 100ms min - ensures μP completes full power-up initialization before release | Supply Voltage Range | +1.2V to +5.5V - supports operation down to near-dead-battery conditions |
| Supply Current | 4μA typ at +3.6V - enables multi-year battery life in portable equipment |
| Output Type | Open-drain active-low RESET with 5.5kΩ internal pullup - interfaces directly with bidirectional μP reset pins |
| Operating Temp | –40°C to +105°C - qualified for industrial and extended-temperature embedded use |
| VCC to RESET Delay | 2µs min - fast response to supply collapse, preventing code corruption |
Pinout & Package
MXD1816UR22+ is housed in a 3-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with industry-standard SC70-3 but with larger pad spacing for robust assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Supply input and reset-threshold monitor node - connects directly to monitored rail |
| 2 | RESET | Open-drain active-low output - sinks current when asserted; pulled high internally to VCC |
| 3 | GND | Ground reference - must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates precision reference, comparator, timer, and pullup - eliminates BOM cost and layout area |
| Guaranteed RESET validity to VCC = +1V | Ensures deterministic reset state even during deep brownout or battery sag |
| ±2.5% reset threshold accuracy over temperature | Reduces need for margining in supply design; avoids false resets or missed brownouts |
| Power-supply transient immunity | Rejects <10µs negative VCC glitches up to 200mV overdrive - prevents spurious resets |
| Low 4μA supply current | Enables always-on supervision in energy-constrained IoT sensors and wearables |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require reliable power-on reset during cold-start from depleted Li-ion cells. IC Role / Device Role / Timing Role: MXD1816UR22+ monitors the 3.3V LDO output and asserts RESET until stable, ensuring firmware boots only after full rail regulation. Use Value: 2.18V threshold matches 3.3V rail dropout margin; 4μA quiescent current extends single-charge battery life by >18 months. | Use Scenario: DIN-rail mounted PLC modules operate in wide-temperature factories where 24V-to-3.3V conversion may experience ripple or slow ramp-up. IC Role / Device Role / Timing Role: MXD1816UR22+ supervises the 3.3V logic rail and holds microcontroller in reset until voltage settles above 2.18V for ≥100ms. Use Value: –40°C to +105°C rating ensures reliability in uncontrolled environments; open-drain output interfaces cleanly with ARM Cortex-M reset pins. |
| Smart Home Hub Controllers | Point-of-Sale Terminal Power Management |
Use Scenario: Wi-Fi/BLE hubs integrate multiple SoCs and PMICs; inconsistent power sequencing risks lockup during AC power restoration. IC Role / Device Role / Timing Role: MXD1816UR22+ provides independent, rail-specific reset timing for the main application processor, decoupled from PMIC sequencing. Use Value: Internal 5.5kΩ pullup eliminates external resistor, saving PCB space; 100ms timeout exceeds typical SoC power-good assertion delays. | Use Scenario: Retail terminals powered from 12V adapters experience brownouts during printer motor surges, risking transaction corruption. IC Role / Device Role / Timing Role: MXD1816UR22+ watches the 3.3V core rail and forces hard reset on sub-2.18V dips lasting >2µs, overriding software watchdogs. Use Value: 2µs fast detection captures short transients missed by slower supervisors; ±2.5% threshold tolerance prevents marginal resets at 2.25V. |
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, 140ms timeout, same SOT23-3 package, 3.5μA ICC | Higher threshold suits +3.3V systems with tighter noise margins; longer timeout accommodates slower regulators | Select when system requires higher trip point and longer hold time than MXD1816UR22+ |
| TPS3808G125DBVR | 1.25V threshold, adjustable via external resistor, 200ms timeout, 1.1μA ICC, SOT23-6 | Adjustable threshold enables fine-tuning; lower ICC benefits ultra-low-power designs; extra pin adds enable control | Choose for flexible threshold setting or sub-2μA supply current needs-requires PCB redesign due to 6-pin package |
Compared with MXD1816UR22+, MAX809TRD2+T offers higher reset voltage and longer timeout in identical packaging, while TPS3808G125DBVR trades fixed threshold for adjustability and ultra-low current at the cost of pin count and layout change.
Availability
MXD1816UR22+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and point-of-sale terminal power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MXD1816UR22+ 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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MXD1810–MXD1818 family delivers low-power, factory-trimmed reset supervision for microprocessor-based systems-optimized for space-constrained, battery-operated, and wide-temperature embedded devices.
FAQ
What is the exact reset threshold voltage of MXD1816UR22+ and how tightly is it specified?
The MXD1816UR22+ has a factory-set reset threshold of 2.18V, with guaranteed accuracy of ±2.5% over the full –40°C to +105°C temperature range. This means the actual trip point falls between 2.12V and 2.25V under all operating conditions, enabling robust brownout detection for +2.5V and +3.3V systems without design margining.
Does MXD1816UR22+ support manual reset functionality via the RESET pin?
No, MXD1816UR22+ does not support manual reset. Only MXD1813 and MXD1818 variants include debounced manual-reset detection on the RESET pin. In MXD1816UR22+, the RESET pin is output-only (open-drain active-low); applying an external signal to it may damage the device or cause undefined behavior.
Can MXD1816UR22+ be used with a +5V supply rail?
Yes, MXD1816UR22+ supports VCC from +1.2V to +5.5V per absolute maximum ratings, but its 2.18V reset threshold is optimized for +2.5V/+3.3V systems. Using it on +5V rails will assert reset only if VCC drops below 2.18V-a deep undervoltage condition-and is not recommended for standard +5V supervision; MXD1810/MXD1811 variants with 4.12V–4.62V thresholds are appropriate for +5V applications.
What is the purpose of the internal 5.5kΩ pullup resistor in MXD1816UR22+?
The internal 5.5kΩ pullup resistor on the open-drain RESET output of MXD1816UR22+ ensures a defined high state when the output is not actively sinking current. This eliminates the need for an external pullup, simplifies PCB layout, and enables direct interfacing with microcontrollers that have bidirectional reset pins-such as the Motorola 68HC11-without additional components.
How does MXD1816UR22+ handle fast transients on the VCC line?
MXD1816UR22+ incorporates built-in power-supply transient immunity: it ignores negative-going VCC glitches shorter than ~10µs (depending on amplitude), as confirmed by the "Maximum Transient Duration vs. Reset Threshold Overdrive" curve in its datasheet. This prevents spurious resets caused by switching noise or load transients, ensuring only sustained brownouts trigger the reset function.
MXD1816UR22+ 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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.18V
- 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:
- SOT-23-3
MXD1816UR22+ FAQ
1.How can I place an order for MXD1816UR22+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1816UR22+ 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 MXD1816UR22+ reliable?
The price and inventory of MXD1816UR22+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1816UR22+ is usually 5 days.
3.What payment methods are accepted for MXD1816UR22+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1816UR22+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1816UR22+?
MXD1816UR22+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1816UR22+ 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 MXD1816UR22+?
For technical support, including MXD1816UR22+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1816UR22+ requirements.
6.How does Aetrix verify that MXD1816UR22+ is sourced from the original manufacturer or authorized distributors?
All MXD1816UR22+ 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 MXD1816UR22+ meets industry standards.
7.What is the process for return or replacement of MXD1816UR22+?
All MXD1816UR22+ units undergo pre-shipment inspection (PSI). If there is an issue with MXD1816UR22+, 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 MXD1816UR22+ part is unused and in its original packaging.
Return procedure for MXD1816UR22+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1816UR22+ 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…
