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Analog Devices Inc./Maxim Integrated MAX6386LT28D7+T
- Part No.:
- MAX6386LT28D7+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6386LT28D7+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6386LT28D7+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.80V reset threshold (±2.5% over -40°C to +125°C), 1200ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6386LT28D7+T datasheet, MAX6386LT28D7+T pinout, MAX6386LT28D7+T application, or MAX6386LT28D7+T equivalent, key selection criteria include guaranteed reset assertion down to VCC = 1V, 3μA supply current at 1.8V, ±2.5% threshold accuracy over temperature, and compatibility with SC70-4 and μDFN-6 packages for space-constrained designs.
Technical Context
The MAX6386LT28D7+T implements a precision bandgap-based reset comparator with internal 2.80V reference and a monostable timeout timer triggered by VCC falling below threshold or MR assertion. Its open-drain RESET output requires an external pullup and remains valid down to VCC = 1V, enabling robust reset signaling during deep brownout conditions.
It features a dedicated debounced MR input with internal 63kΩ pullup resistor, supporting TTL/CMOS-compatible manual reset initiation without external components. The device operates across -40°C to +125°C and is RoHS-compliant with lead-free packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V (nominal), ±2.5% tolerance over -40°C to +125°C - ensures accurate detection of 2.8V supply brownout without false triggers. |
| VCC Reset Timeout | 1200ms (minimum) - guarantees μP remains held in reset long enough for stable power rail recovery after brownout. |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable devices. |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration with other reset sources and level-shifting via external pullup. |
| Manual Reset Input | MR with internal 63kΩ pullup - supports direct connection of momentary switch to GND; no external resistor required. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications. |
| VCC Range | 1.0V to 5.5V - supports reset generation even during severe undervoltage, ensuring deterministic behavior down to near-zero supply. |
Pinout & Package
MAX6386LT28D7+T is available in 4-pin SC70 (package code X4+1) and 6-pin μDFN (package code L611+1) packages. Both variants share identical pin functions and electrical characteristics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source; powers internal circuitry and feeds reset comparator. |
| 2 | RESET | Open-drain active-low reset output; must be pulled up externally to assert logic-high when deasserted. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; drives reset low when grounded. |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for noise immunity and accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.80V with ±2.5% accuracy over full temperature range - eliminates need for external resistor dividers or calibration. |
| Guaranteed reset validity | RESET output state defined down to VCC = 1V - prevents undefined logic states during deep brownout recovery. |
| Negative-going transient immunity | Immune to VCC glitches ≤ 100µs at 200mV overdrive - suppresses false resets caused by switching noise or ESD coupling. |
| Low-power operation | 3μA ICC at 1.8V - extends battery life in always-on monitoring nodes without compromising supervision reliability. |
| Debounced manual reset | MR input includes internal filtering and 63kΩ pullup - enables direct switch interface with no external RC network required. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply in programmable logic controller modules exposed to wide ambient temperature swings and conducted EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M core during brownout, with 1200ms timeout ensuring firmware reload completes before execution resumes. Use Value: Prevents corrupted register writes and flash corruption during unstable 3.3V rail recovery, meeting IEC 61000-4-4 immunity requirements. |
Use Scenario: Embedded in vehicle door module to supervise 5V power rail feeding CAN transceiver and window motor driver ICs. IC Role / Device Role / Timing Role: Open-drain RESET output wired-OR'd with other subsystem supervisors; asserts during cold-cranking voltage dip (<6V) to hold MCU in reset until stable 5V returns. Use Value: Ensures synchronized restart of CAN communication stack and motor control firmware after engine start, eliminating bus arbitration errors. |
| Portable Medical Sensor Hub | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Powers on ultra-low-power glucose monitor using CR2032 coin cell; supervises 2.8V LDO output feeding BLE SoC. IC Role / Device Role / Timing Role: Resets nRF52832 SoC when battery voltage drops below 2.8V; MR pin enables user-initiated recalibration via tactile button. Use Value: 3μA quiescent current extends shelf life >2 years; 2.80V threshold matches battery end-of-life cutoff, preventing data loss during final discharge cycle. |
Use Scenario: Supervises dual-rail power domain (3.3V MCU + 1.2V RTC) in ANSI C12.20-certified electricity meter with tamper-detection circuitry. IC Role / Device Role / Timing Role: Provides primary reset for main application processor; open-drain output interfaces with backup RTC supervisor for fail-safe timekeeping. Use Value: ±2.5% threshold accuracy over -40°C to +85°C ensures consistent reset behavior across outdoor meter deployments, avoiding false resets in desert heat or arctic cold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR28D7+T | Same 2.80V threshold and 1200ms timeout, but push-pull active-low output and no MR input. | Lacks manual reset capability; requires external pullup only if interfacing with open-drain buses. | Select when MR functionality is unnecessary and board layout favors push-pull drive strength over wired-OR flexibility. |
| TPS3808G33DBVR | 2.93V threshold (not 2.80V), 1200ms timeout, push-pull active-low, no MR, higher 8μA ICC at 1.8V. | Higher threshold may cause earlier reset assertion on 2.8V rails; lacks MR for field service reset. | Choose only if 2.93V threshold aligns with system margin requirements and lower quiescent current is not critical. |
Compared with MAX6386LT28D7+T, MAX6326XR28D7+T offers simpler drive but no manual reset, while TPS3808G33DBVR trades threshold precision and ultra-low ICC for TI's production scalability-making MAX6386LT28D7+T optimal for battery-sensitive, MR-requiring designs needing exact 2.80V trip point.
Availability
MAX6386LT28D7+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, portable medical sensor hubs, smart energy meter MCU subsystems, and battery-powered edge AI nodes requiring stable component supply across extended temperature ranges.
Supply support for MAX6386LT28D7+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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessors in space- and energy-constrained systems, emphasizing factory-trimmed thresholds, wide temperature operation, and flexible reset output configurations.
FAQ
What is the exact reset threshold voltage of MAX6386LT28D7+T and how stable is it over temperature?
The MAX6386LT28D7+T has a nominal reset threshold of 2.80V, with guaranteed tolerance of ±2.5% across the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimmed bandgap reference circuitry and is confirmed in the Electrical Characteristics table of the official datasheet. The MAX6386LT28D7+T maintains this accuracy without external calibration components.
Does MAX6386LT28D7+T support manual reset, and what is the internal pullup value on the MR pin?
Yes, MAX6386LT28D7+T includes a debounced manual reset input (MR) pin with an internal 63kΩ pullup resistor to VCC. This allows direct connection of a normally open momentary switch between MR and GND to initiate a system reset without external components. The MR pin accepts TTL/CMOS logic levels and remains functional across the full -40°C to +125°C temperature range.
What package options are available for MAX6386LT28D7+T, and are both RoHS-compliant?
MAX6386LT28D7+T is offered in two RoHS-compliant, lead(Pb)-free packages: 4-pin SC70 (outline 21-0098) and 6-pin μDFN (outline 21-0147). Both carry the "+T" suffix indicating lead-free/RoHS compliance. The SC70 variant uses package code X4+1; the μDFN uses L611+1. Land patterns and thermal data are published on maximintegrated.com/packages.
How does the open-drain RESET output of MAX6386LT28D7+T behave during deep brownout conditions?
The MAX6386LT28D7+T guarantees valid logic-state output on its open-drain RESET pin down to VCC = 1V - meaning it continues asserting active-low reset even as supply voltage collapses. Below 1V, the output enters high-impedance state. This behavior ensures deterministic reset signaling during severe undervoltage events, unlike push-pull variants that may float or oscillate near VCC dropout.
Is MAX6386LT28D7+T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6386LT28D7+T is pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series in the same package footprint (e.g., SC70-4 or μDFN-6). This allows drop-in replacement in existing designs without PCB changes, provided the reset threshold (2.80V) and open-drain output configuration meet system requirements.
MAX6386LT28D7+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX6386LT28D7+T FAQ
1.How can I place an order for MAX6386LT28D7+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386LT28D7+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 MAX6386LT28D7+T reliable?
The price and inventory of MAX6386LT28D7+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386LT28D7+T is usually 5 days.
3.What payment methods are accepted for MAX6386LT28D7+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386LT28D7+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386LT28D7+T?
MAX6386LT28D7+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386LT28D7+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 MAX6386LT28D7+T?
For technical support, including MAX6386LT28D7+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386LT28D7+T requirements.
6.How does Aetrix verify that MAX6386LT28D7+T is sourced from the original manufacturer or authorized distributors?
All MAX6386LT28D7+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 MAX6386LT28D7+T meets industry standards.
7.What is the process for return or replacement of MAX6386LT28D7+T?
All MAX6386LT28D7+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386LT28D7+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 MAX6386LT28D7+T part is unused and in its original packaging.
Return procedure for MAX6386LT28D7+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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