My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MXD1816XR26+T
- Part No.:
- MXD1816XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MXD1816XR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MXD1816XR26+T from Maxim Integrated is a low-power, open-drain, active-low microprocessor reset supervisor IC designed for +2.5V/+3.0V/+3.3V digital systems. It monitors VCC and asserts RESET when supply voltage falls below 2.55V (±2.5% over temperature), maintains reset for ≥100ms after VCC recovery, features an internal 5.5kΩ pullup resistor, and operates across –40°C to +105°C in SC70-3 packaging - ideal for portable, battery-powered controllers and embedded μP monitoring.
For engineers reviewing the MXD1816XR26+T datasheet, MXD1816XR26+T pinout, MXD1816XR26+T application, or MXD1816XR26+T equivalent, key selection criteria include its 2.55V factory-trimmed reset threshold, open-drain output compatibility with bidirectional μP reset pins (e.g., Motorola 68HC11), immunity to sub-5µs VCC transients, and guaranteed RESET validity down to VCC = +1V.
Technical Context
The MXD1816XR26+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its 2.55V threshold, coupled with a monolithic timer that enforces a minimum 100ms reset timeout period upon VCC recovery. Its open-drain RESET output eliminates need for external pullups and enables wired-OR configurations with other reset sources.
This device belongs to the MXD1815–MXD1818 subfamily optimized for 2.5V/3.0V/3.3V systems and excludes manual-reset debouncing circuitry - distinguishing it from MXD1818 variants. It uses BiCMOS process technology, draws only 4µA typical supply current at +3.6V, and guarantees correct logic state output even as VCC declines to +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V ±2.5% over –40°C to +105°C - ensures reliable brownout detection for 2.5V/3.3V systems without external calibration |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP initialization during power-up or recovery |
| Supply Current | 4µA typical at +3.6V - enables multi-year operation in coin-cell–powered portable equipment |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET assertion down to VCC = +1V, critical for low-voltage brownout handling |
| Output Type | Open-drain, active-low - allows direct interface to bidirectional μP reset pins without external components |
| Internal Pullup Resistor | 5.5kΩ nominal - eliminates need for external pullup while maintaining logic-high state when RESET is inactive |
| Package | 3-pin SC70 - space-constrained footprint (2.0 × 1.25 × 0.9mm) suitable for high-density portable PCB layouts |
Pinout & Package
MXD1816XR26+T is housed in a 3-pin SC70 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 1.25mm × 0.9mm with gull-wing leads. The package is RoHS-compliant (lead-free), moisture-sensitive level 1, and rated for reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SC70) | RESET | Open-drain, active-low reset output - sinks current when asserted; pulled high via internal 5.5kΩ resistor when inactive |
| 2 (SC70) | VCC | Supply input and reset-threshold monitor node - powers internal circuitry and serves as reference for voltage detection |
| 3 (SC70) | GND | Analog/digital ground reference - must be connected directly to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates precision voltage reference, comparator, timer, and pullup resistor - reduces BOM count and layout area |
| Factory-set 2.55V reset threshold | Eliminates trimming or calibration - ensures consistent power-on reset behavior across production batches |
| ±2.5% threshold accuracy over temperature | Maintains tight brownout detection window from –40°C to +105°C without derating or guard-banding |
| 4µA typical supply current | Enables use in always-on, ultra-low-power subsystems such as real-time clock supervisors or wake-on-event circuits |
| BiCMOS process technology | Delivers high noise immunity and fast transient response (<5µs detection delay) while minimizing leakage and quiescent current |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require reliable power-on reset under fluctuating coin-cell voltage. IC Role / Device Role / Timing Role: MXD1816XR26+T monitors 3.3V rail and asserts active-low RESET until stable supply is confirmed. Use Value: Guarantees μC boots only after VCC exceeds 2.55V and remains high for ≥100ms - preventing corrupted firmware execution during weak-battery startup. |
Use Scenario: DIN-rail mounted PLC modules operate in harsh industrial environments with noisy 24V-to-3.3V DC/DC supplies. IC Role / Device Role / Timing Role: MXD1816XR26+T supervises the 3.3V logic rail and interfaces directly to bidirectional reset pins of ARM Cortex-M MCUs. Use Value: Open-drain output enables shared reset bus with fieldbus transceivers; internal pullup avoids external component while ensuring clean release timing. |
| Smart Home Hub Controllers | Automotive Infotainment Subsystems |
Use Scenario: Wi-Fi/BLE-enabled home hubs integrate multiple SoCs sharing a common 3.3V domain with variable load transients. IC Role / Device Role / Timing Role: MXD1816XR26+T provides independent reset supervision for application processors and wireless co-processors. Use Value: Immunity to <5µs VCC glitches prevents spurious resets during RF transmission bursts - improving system uptime and OTA update reliability. |
Use Scenario: Infotainment head units use isolated 3.3V domains for display controllers and audio codecs, requiring robust brownout protection. IC Role / Device Role / Timing Role: MXD1816XR26+T monitors post-regulator 3.3V rail and drives RESET line shared across multiple ASICs. Use Value: Valid RESET output down to VCC = +1V ensures deterministic shutdown sequencing during battery droop - avoiding latch-up or data corruption. |
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 | Same 2.55V threshold, SOT23-3 package, push-pull output (not open-drain) | Requires external pullup for bidirectional reset bus; less suitable for wired-OR topologies | Select when board layout already uses push-pull reset drivers and no shared reset arbitration is needed |
| TPS3808G125DBVR | 2.55V threshold, SOT23-6 package, adjustable delay (via capacitor), higher 8µA ICC | Offers programmable timeout (1ms–10s); larger footprint and higher quiescent current than MXD1816XR26+T | Select when system requires nonstandard reset durations or future design flexibility beyond fixed 100ms |
Compared with MAX809TRD3+T and TPS3808G125DBVR, the MXD1816XR26+T delivers optimal fit for space-constrained, low-power 3.3V systems needing open-drain reset arbitration - combining minimal footprint, lowest ICC, and seamless integration with bidirectional μP reset pins without external components.
Availability
MXD1816XR26+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive infotainment subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MXD1816XR26+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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MXD1810–MXD1818 family was designed specifically for cost-sensitive, space-constrained microprocessor reset supervision in portable and embedded systems - emphasizing ultra-low power, factory-trimmed accuracy, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the MXD1816XR26+T, and how tightly is it specified?
The MXD1816XR26+T has a factory-set reset threshold of 2.55V, 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_ _ R26" entry, where min/typ/max are 2.47V/2.55V/2.64V. The threshold is trimmed during production and does not require external adjustment.
Does the MXD1816XR26+T support manual reset functionality via the RESET pin?
No, the MXD1816XR26+T does not include manual reset detection or debouncing circuitry. That feature is exclusive to MXD1813 and MXD1818 variants. The RESET pin on MXD1816XR26+T serves only as an open-drain output - it is not an input and cannot be used to trigger reset externally.
What is the purpose of the internal 5.5kΩ pullup resistor in the MXD1816XR26+T?
The internal 5.5kΩ pullup resistor ensures the RESET pin defaults to a logic-high state when not actively driven low by the IC, eliminating the need for an external pullup. This simplifies design for systems using bidirectional μP reset pins (e.g., Motorola 68HC11) and enables wired-OR reset bus configurations without additional components.
Can the MXD1816XR26+T operate reliably at VCC = +1.2V?
Yes - the MXD1816XR26+T is fully specified to guarantee correct RESET/RESET logic states down to VCC = +1.0V (minimum), and its electrical characteristics table confirms operation from +1.2V to +5.5V at –40°C to +105°C. This ensures deterministic reset behavior during deep brownout conditions before complete power loss.
Is the MXD1816XR26+T pin-compatible with other devices in the MXD181x family?
Yes - all MXD181x devices, including MXD1816XR26+T, share identical 3-pin SC70 and SOT23 footprints and pinouts (VCC, RESET, GND). However, output type (open-drain vs. push-pull) and features (e.g., manual reset) differ across variants, so functional compatibility must be verified per application requirements.
MXD1816XR26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.55V
- 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
MXD1816XR26+T FAQ
1.How can I place an order for MXD1816XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MXD1816XR26+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 MXD1816XR26+T reliable?
The price and inventory of MXD1816XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXD1816XR26+T is usually 5 days.
3.What payment methods are accepted for MXD1816XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXD1816XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXD1816XR26+T?
MXD1816XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXD1816XR26+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 MXD1816XR26+T?
For technical support, including MXD1816XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXD1816XR26+T requirements.
6.How does Aetrix verify that MXD1816XR26+T is sourced from the original manufacturer or authorized distributors?
All MXD1816XR26+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 MXD1816XR26+T meets industry standards.
7.What is the process for return or replacement of MXD1816XR26+T?
All MXD1816XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MXD1816XR26+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 MXD1816XR26+T part is unused and in its original packaging.
Return procedure for MXD1816XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXD1816XR26+T 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…
