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Analog Devices Inc./Maxim Integrated MAX6385XS26D1-T
- Part No.:
- MAX6385XS26D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS26D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,008
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Product details
Overview
MAX6385XS26D1-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.63V reset threshold, 1ms minimum reset timeout, and manual reset input (MR). It monitors VCC from +1.8V to +5.0V, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS26D1-T datasheet, MAX6385XS26D1-T pinout, MAX6385XS26D1-T application, or MAX6385XS26D1-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR input pullup resistance (63kΩ), guaranteed operation at VCC ≥ 1V, and compatibility with SC70-4 packaging for space-constrained designs.
Technical Context
The MAX6385XS26D1-T implements a precision voltage comparator with internal 2.63V reference and an on-chip timer that enforces a minimum 1ms reset assertion after VCC rises above threshold. Its MR input features internal 63kΩ pullup and accepts TTL/CMOS logic levels, enabling direct switch or microcontroller-driven reset initiation without external components.
This device belongs to the MAX6381–MAX6390 family of single-supply supervisors with fixed thresholds and discrete timeout options. Unlike open-drain variants, it delivers active-high push-pull RESET output capable of sourcing up to 800µA at VCC ≥ 4.5V, eliminating need for external pullup resistors in most host systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V nominal (±2.5% over −40°C to +125°C); ensures reliable detection of 2.5V system rail brownout. |
| Reset Timeout | 1ms minimum; provides sufficient hold time for microprocessor initialization before release. |
| VCC Supply Current | 3μA at +1.8V; enables multi-year battery life in always-on IoT sensors and wearables. |
| Operating Voltage Range | +1.0V to +5.5V; supports valid reset assertion even during deep brownout down to 1V supply. |
| MR Input Pullup | 63kΩ internal resistor; allows direct connection of momentary switch to GND without external biasing. |
| RESET Output Type | Active-high push-pull; drives high actively (VOH ≥ 0.8×VCC) and low actively (VOL ≤ 0.3V), no external pullup needed. |
| Package | 4-pin SC70 (X4+1 outline); 1.3mm × 1.7mm footprint ideal for compact PCB layouts. |
Pinout & Package
MAX6385XS26D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.7mm × 0.9mm with gull-wing leads. Thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and serves as reset threshold reference point. |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low when VCC exceeds 2.63V for ≥1ms. |
| 3 | MR | Active-low manual reset input; pulling low forces immediate reset assertion and holds for full 1ms timeout after release. |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 2.63V threshold | Eliminates external resistor divider; reduces BOM count and layout area in 2.5V/3.3V systems. |
| 1ms minimum reset timeout | Meets minimum reset hold time requirements for ARM Cortex-M0/M3 and RISC-V microcontrollers. |
| Internal MR pullup (63kΩ) | Enables direct switch-to-GND implementation-no external resistor required for basic manual reset function. |
| Valid RESET down to VCC = 1V | Ensures deterministic reset state during severe brownout, preventing runaway code execution in battery-depleted devices. |
| −40°C to +125°C operation | Qualified for industrial and automotive under-hood applications where ambient temperature extremes are common. |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Wearable ECG patch operating from coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 2.5V LDO output and asserts active-high RESET to MSP430FR2355 during voltage sag below 2.63V. Use Value: 3μA quiescent current extends battery life beyond 2 years; 1ms timeout satisfies MCU reset timing spec. |
Use Scenario: LoRaWAN soil moisture sensor deployed in remote agricultural fields. IC Role / Device Role / Timing Role: Supervises 3.3V buck converter output and triggers reset via MR button press during firmware update. Use Value: Internal 63kΩ MR pullup removes need for external biasing; SC70-4 footprint saves >0.8mm² PCB area. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted controller with 24V-to-3.3V conversion and noise-prone field wiring. IC Role / Device Role / Timing Role: Provides VCC supervision and debounced MR input for maintenance mode entry. Use Value: ±2.5% threshold accuracy over −40°C to +125°C ensures consistent trip point across operating range. |
Use Scenario: Door module powered from vehicle battery with load-dump transients. IC Role / Device Role / Timing Role: Detects 2.63V brownout on 3.3V domain and asserts RESET to S32K116 MCU. Use Value: Negative-going transient immunity prevents spurious resets during alternator switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS26D2-T | Same 2.63V threshold and MR input, but 20ms reset timeout instead of 1ms. | Suitable for systems requiring longer reset hold time (e.g., FPGA configuration loading). | Select when longer timeout is needed; otherwise, MAX6385XS26D1-T offers tighter timing control. |
| TPS3123QDBVRQ1 | 2.63V threshold, 200ms timeout, AEC-Q100 qualified, but no MR input and higher 8μA ICC. | Designed for automotive ASIL-B applications where MR is not required and longer timeout is acceptable. | Choose for automotive production with AEC-Q100 compliance; avoid if MR functionality or ultra-low ICC is critical. |
Compared with MAX6385XS26D2-T and TPS3123QDBVRQ1, the MAX6385XS26D1-T uniquely combines 1ms timeout, MR input, and 3μA ICC in a 4-pin SC70 - making it optimal for space- and power-sensitive portable electronics requiring precise, short-duration reset assertion.
Availability
MAX6385XS26D1-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS26D1-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 power management, sensing, and interface applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family was engineered specifically for microprocessor reset supervision in space-constrained, battery-operated, and industrial environments - delivering guaranteed operation from 1V to 5.5V with minimal quiescent current.
FAQ
What is the exact reset threshold voltage of MAX6385XS26D1-T?
The MAX6385XS26D1-T has a factory-set nominal reset threshold of 2.63V, with tolerance of ±2.5% over the full temperature range (−40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "26" corresponds to VTH(min) = 2.56V, VTH(nom) = 2.63V, and VTH(max) = 2.69V.
Does MAX6385XS26D1-T support manual reset functionality?
Yes, MAX6385XS26D1-T includes a dedicated active-low manual reset input (MR) with internal 63kΩ pullup resistor to VCC. Driving MR low forces immediate reset assertion, and the reset remains active for the full 1ms timeout period after MR is released - no external components are required for basic switch-based reset.
What package type and dimensions does MAX6385XS26D1-T use?
MAX6385XS26D1-T is packaged in a 4-pin SC70 (X4+1 outline), measuring 1.3mm × 1.7mm × 0.9mm with gull-wing leads. The land pattern number is 90-0187, and thermal resistance θJA is 322.6°C/W on a multilayer PCB - verified in the official Package Information section.
Can MAX6385XS26D1-T operate reliably at low supply voltages?
Yes, MAX6385XS26D1-T guarantees correct reset output logic state down to VCC = 1.0V, and operates across a full range of +1.0V to +5.5V. Its 3μA supply current at +1.8V and robust comparator design ensure deterministic behavior during deep brownout conditions typical in battery-depleted systems.
Is MAX6385XS26D1-T pin-compatible with other members of the MAX638x family?
MAX6385XS26D1-T shares identical 4-pin SC70 pinout with MAX6384, MAX6386, and MAX6390 variants - all feature VCC, RESET, MR, and GND on pins 1–4 respectively. However, it is not pin-compatible with 3-pin SC70 (e.g., MAX6381) or 6-pin μDFN versions due to differing pin counts and functions.
MAX6385XS26D1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS26D1-T FAQ
1.How can I place an order for MAX6385XS26D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS26D1-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 MAX6385XS26D1-T reliable?
The price and inventory of MAX6385XS26D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS26D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS26D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS26D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS26D1-T?
MAX6385XS26D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS26D1-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 MAX6385XS26D1-T?
For technical support, including MAX6385XS26D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS26D1-T requirements.
6.How does Aetrix verify that MAX6385XS26D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS26D1-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 MAX6385XS26D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS26D1-T?
All MAX6385XS26D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS26D1-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 MAX6385XS26D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS26D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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