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Analog Devices Inc./Maxim Integrated MAX6385XS27D5-T
- Part No.:
- MAX6385XS27D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS27D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,119
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Product details
Overview
MAX6385XS27D5-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit designed to monitor +2.7V supply rails in embedded systems. It asserts reset when VCC falls below 2.70V (±2.5% over –40°C to +125°C), guarantees valid output down to VCC = 1V, features a 280ms minimum reset timeout, and consumes only 3μA at +1.8V - enabling reliable power-on reset in battery-powered microcontroller applications.
For engineers reviewing the MAX6385XS27D5-T datasheet, MAX6385XS27D5-T pinout, MAX6385XS27D5-T application, or MAX6385XS27D5-T equivalent, key selection criteria include its factory-set 2.70V threshold, 280ms VCC reset timeout, 4-pin SC70 package with manual reset input, and guaranteed operation across automotive-grade temperature range (–40°C to +125°C).
Technical Context
The MAX6385XS27D5-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over full temperature range and 60ppm/°C tempco. Its internal timer generates a fixed 280ms reset assertion period after VCC recovers above 2.70V or after MR release.
It integrates a debounced active-low manual reset input (MR) with 63kΩ internal pullup, supports reset assertion during brownout or negative-going VCC transients up to 100mV overdrive, and ensures RESET output remains logic-valid even as VCC drops to 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.70V ±2.5% (–40°C to +125°C); ensures accurate brownout detection for 2.7V systems |
| VCC Reset Timeout | 280ms minimum; holds μP in reset long enough for stable power rail recovery |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V; guarantees functional reset output down to VCC = 1V |
| Reset Output Type | Active-high push-pull; drives high without external pullup, sinks/source ≥80µA at 1.0V |
| Manual Reset Input | MR with 63kΩ internal pullup; accepts TTL/CMOS levels, requires no external debounce |
| Temperature Range | –40°C to +125°C; qualified for automotive and industrial under-hood applications |
Pinout & Package
MAX6385XS27D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Power supply input and primary voltage monitor rail; operates from 1.0V to 5.5V |
| 2 | GND | Analog/digital ground reference; must be connected directly to system ground plane |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; asserts reset when pulled ≤0.3×VCC |
| 4 | RESET | Active-high push-pull reset output; drives high during reset; sinks/source current down to VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.70V threshold | Eliminates external resistor divider; reduces BOM count and layout area in space-constrained designs |
| 280ms guaranteed reset timeout | Ensures sufficient hold time for slow-ramping power supplies and clock stabilization before μP execution |
| 3μA supply current at 1.8V | Extends battery life in portable instrumentation and wireless sensor nodes without compromising supervision integrity |
| MR input with 63kΩ internal pullup | Enables direct connection of momentary switch to GND; removes need for external pullup resistor and associated PCB trace |
| Valid RESET output down to VCC = 1V | Maintains deterministic reset state during deep brownout or fast power collapse, preventing spurious μP wake-up |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Monitoring 2.7V core supply in programmable logic controller I/O expansion modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M4 MCU during cold-start and load-dump events. Use Value: 2.70V threshold matches typical 2.7V LDO output; 280ms timeout accommodates slow-starting isolated DC-DC converters. | Use Scenario: Power-on reset generation for infotainment SoC subsystems operating from 2.7V I/O rail in vehicle cabin environments. IC Role / Device Role / Timing Role: Active-high push-pull reset supervisor ensuring deterministic boot sequence after ignition cycle. Use Value: –40°C to +125°C rating meets AEC-Q100 Grade 2 requirements; MR pin enables service-mode forced reset via diagnostic tool. |
| Portable Medical Sensors | Battery-Powered Smart Meters |
Use Scenario: Supervising 2.7V supply in wearable ECG sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-quiescent-current reset generator holding nRESET line high until regulated rail stabilizes post-power-up. Use Value: 3μA ICC at 1.8V extends shelf life; 4-pin SC70 footprint minimizes PCB area in ultra-compact housing. | Use Scenario: Ensuring clean startup of metrology ASIC in AMI smart meter after battery backup switchover. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 2.7V rail and provides manual reset via tamper-detection switch. Use Value: MR input with internal pullup simplifies tamper interface; 280ms timeout exceeds typical RTC oscillator stabilization time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XR27D5-T | Same 2.70V threshold and 280ms timeout, but in 3-pin SC70 package; lacks MR pin | No manual reset capability; suitable only for fixed-supply systems without field service requirement | Select when board space is critical and MR functionality is unnecessary |
| TPS3123E18DBVR | 2.7V threshold, 200ms timeout, 1.8V min VCC, but active-low open-drain output and no MR pin | Requires external pullup; incompatible with active-high reset inputs; not pin-compatible | Choose only if redesign allows level-shifting and timing adjustment |
Compared with MAX6385XR27D5-T, the MAX6385XS27D5-T adds MR functionality in a 4-pin SC70 footprint; versus TPS3123E18DBVR, it offers active-high push-pull drive and integrated MR - eliminating external components and supporting tighter timing control in μP boot sequences.
Availability
MAX6385XS27D5-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, portable medical sensors, and battery-powered smart meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS27D5-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, factory-trimmed reset supervisors optimized for space- and energy-constrained microcontroller systems operating across –40°C to +125°C.
FAQ
What is the exact reset threshold voltage of MAX6385XS27D5-T and how stable is it over temperature?
The MAX6385XS27D5-T has a factory-set reset threshold of 2.70V with ±2.5% tolerance over the full operating temperature range of –40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts less than ±0.3% across the entire range - ensuring consistent brownout detection in automotive and industrial environments where supply rails vary with thermal stress.
Does MAX6385XS27D5-T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6385XS27D5-T includes an active-low manual reset (MR) input with a 63kΩ internal pullup resistor to VCC. To assert reset, MR must be driven below 0.3×VCC (e.g., <0.81V at VCC = 2.7V). The pin accepts standard TTL/CMOS logic levels and requires no external debounce circuitry - a simple momentary switch to GND suffices for field service or test-mode reset initiation.
What is the guaranteed minimum reset timeout period for MAX6385XS27D5-T, and does it change with supply voltage or temperature?
The MAX6385XS27D5-T guarantees a minimum reset timeout of 280ms after VCC rises above 2.70V or after MR is released. This value is specified as a minimum and is stable across temperature (–40°C to +125°C) and supply voltage (1.0V to 5.5V); typical normalized timeout variation is within ±1.5% over temperature, per Maxim's Typical Operating Characteristics data.
Can MAX6385XS27D5-T operate reliably when VCC drops below 1.8V, and what happens to the RESET output?
Yes, MAX6385XS27D5-T is fully specified to operate down to VCC = 1.0V, and its RESET output remains guaranteed logic-valid (high during reset, low otherwise) throughout that range. At VCC = 1.0V, it can still sink or source ≥80µA while maintaining VOL ≤0.3V and VOH ≥0.8×VCC - ensuring robust interface with modern ultra-low-voltage microcontrollers.
Is MAX6385XS27D5-T pin-compatible with legacy Maxim reset ICs like MAX809 or MAX6326?
No, MAX6385XS27D5-T is not pin-compatible with MAX809 or MAX6326. While the datasheet notes functional compatibility with those families, MAX6385XS27D5-T uses a 4-pin SC70 package with pinout VCC–GND–MR–RESET, whereas MAX809 uses 3-pin SOT23 (VCC–GND–RESET) and MAX6326 uses 5-pin SOT23. Direct replacement would require PCB layout revision and signal reassignment.
MAX6385XS27D5-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:
- 2.7V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS27D5-T FAQ
1.How can I place an order for MAX6385XS27D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS27D5-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 MAX6385XS27D5-T reliable?
The price and inventory of MAX6385XS27D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS27D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS27D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS27D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS27D5-T?
MAX6385XS27D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS27D5-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 MAX6385XS27D5-T?
For technical support, including MAX6385XS27D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS27D5-T requirements.
6.How does Aetrix verify that MAX6385XS27D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS27D5-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 MAX6385XS27D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS27D5-T?
All MAX6385XS27D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS27D5-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 MAX6385XS27D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS27D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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