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Analog Devices Inc./Maxim Integrated MAX6385XS46D1-T
- Part No.:
- MAX6385XS46D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS46D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
The MAX6385XS46D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 4.63V reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, and manual reset input (MR) - used in battery-powered controllers and portable instrumentation to ensure reliable power-on reset under brownout conditions.
For engineers reviewing the MAX6385XS46D1-T datasheet, MAX6385XS46D1-T pinout, MAX6385XS46D1-T application, or MAX6385XS46D1-T equivalent, key selection criteria include reset threshold accuracy, MR debounce capability, VCC operating range down to 1.0V, and compatibility with SC70-4 packaging for space-constrained embedded designs.
Technical Context
This device implements a precision voltage comparator with internal 4.63V reference and a monostable timer for reset assertion. It guarantees valid reset output state down to VCC = 1.0V and features an internal 63kΩ pullup on the MR pin for noise-immune manual reset initiation.
The reset logic asserts when VCC falls below 4.63V or MR is pulled low, holding RESET high for ≥1ms after recovery. Its negative-going VCC transient immunity prevents spurious resets during sub-100µs supply glitches at moderate overdrive levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (nominal), ±2.5% over -40°C to +125°C - ensures stable trip point across automotive and industrial temperature ranges |
| Reset Timeout | 1ms (minimum) - provides sufficient hold time for slow-ramping µP clock domains during power-up |
| Supply Current | 3µA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V VCC |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup and enables direct switch-to-GND manual reset |
| Reset Output Type | Active-high push-pull - drives high without external components, compatible with standard µP reset inputs |
| VCC Transient Immunity | Valid rejection of <100µs negative glitches (per overdrive curve) - reduces false resets in noisy power environments |
Pinout & Package
MAX6385XS46D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reset threshold reference |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks current when deasserted |
| 3 | MR | Active-low manual reset input - initiates reset when pulled low; internally pulled up to VCC via 63kΩ |
| 4 | GND | Ground reference - return path for all internal currents and reset output sink current |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Guaranteed operation down to VCC = 1.0V | Ensures deterministic reset behavior during deep undervoltage events, critical for fail-safe embedded systems |
| Debounced manual reset input | Internal 63kΩ pullup and 1µs glitch rejection - supports direct momentary switch connection without external RC filtering |
| Low quiescent current | 3µA at 1.8V - extends battery life in always-on portable devices such as handheld test equipment |
| SC70-4 footprint compatibility | Enables drop-in replacement in space-constrained designs previously using MAX809/MAX6326 family parts |
Applications
| Portable Power Management | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Monitoring Li-ion battery discharge in handheld multimeters where VCC drops from 4.2V to 3.0V during use. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to halt µC execution before brownout-induced corruption. Use Value: 4.63V threshold ensures reset triggers early enough to preserve SRAM contents and enable graceful shutdown. | Use Scenario: Ensuring clean boot sequence in portable gas analyzers powered by alkaline AA cells. IC Role / Device Role / Timing Role: Reset generator with 1ms timeout guaranteeing stable clock and memory initialization before firmware execution. Use Value: 3µA supply current extends operational life beyond 5 years on two AA cells in sleep mode. |
| Industrial Controller Supervision | Medical Diagnostic Handhelds |
Use Scenario: Protecting PLC I/O modules against voltage sags caused by relay switching transients on shared 24V rails. IC Role / Device Role / Timing Role: Brownout detector with negative-going transient immunity suppressing false resets during 50µs/100mV glitches. Use Value: Valid reset output down to VCC = 1.0V maintains system integrity even during severe undervoltage faults. | Use Scenario: Enabling safe power-up sequencing in FDA-cleared pulse oximeters with dual-voltage (3.3V/1.8V) SoC architecture. IC Role / Device Role / Timing Role: Primary supervisor for main µP domain, coordinating with secondary reset monitors on analog front-end. Use Value: Pin-compatible upgrade path from MAX809 simplifies redesign while improving temperature stability (±2.5% vs ±3.5%). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SXR46D1-T | Same 4.63V threshold and 1ms timeout, but no MR input and ±3.5% threshold accuracy over temperature | Lacks manual reset capability; suitable only for fixed-supply systems without field service requirements | Select when MR functionality is unnecessary and cost sensitivity outweighs accuracy needs |
| TPS3808G18DBVR | 1.8V fixed threshold, adjustable timeout (0.5ms–10s), 1.6µA typical ICC at 1.8V, SOT-23-5 package | Not pin-compatible; requires layout change and supports lower VCC monitoring only | Choose for ultra-low-power designs needing sub-2µA current or flexible timeout configuration |
Compared with MAX809SXR46D1-T, MAX6385XS46D1-T adds MR support and tighter threshold accuracy; compared with TPS3808G18DBVR, it offers higher reset voltage and SC70-4 footprint but lacks timeout adjustability and consumes slightly more current.
Availability
MAX6385XS46D1-T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered controllers, and industrial embedded systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS46D1-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 demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers low-power, high-accuracy µP reset supervision with multiple reset configurations and AEC-Q100 qualified variants for automotive use.
FAQ
What is the exact reset threshold voltage of the MAX6385XS46D1-T?
The MAX6385XS46D1-T has a factory-set nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet and applies specifically to the "46" suffix in the part number. The MAX6385XS46D1-T uses this precise threshold to initiate reset when VCC falls below 4.63V.
Does the MAX6385XS46D1-T support manual reset functionality?
Yes, the MAX6385XS46D1-T includes a debounced manual reset input (MR) pin with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate active-high reset assertion, which remains active for the full 1ms timeout period after MR is released. This feature is explicitly documented for MAX6384/MAX6385/MAX6386/MAX6390 variants and is integral to the MAX6385XS46D1-T's function in field-serviceable equipment.
What package type and dimensions does the MAX6385XS46D1-T use?
The MAX6385XS46D1-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is verified in the Ordering Information section and matches the "XS" prefix in the part number, distinguishing it from µDFN or 3-pin SC70 variants.
Can the MAX6385XS46D1-T operate reliably at very low supply voltages?
Yes, the MAX6385XS46D1-T guarantees correct reset output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic behavior during deep brownout conditions - a key design requirement validated for the MAX6385XS46D1-T across its full -40°C to +125°C temperature range.
Is the MAX6385XS46D1-T pin-compatible with older Maxim reset ICs?
The MAX6385XS46D1-T is pin-compatible with the MAX809/MAX810/MAX6326–MAX6348 series in the same 4-pin SC70 package, as stated in the Features section. However, due to the inclusion of the MR pin (absent in MAX809), direct substitution requires verifying that the target PCB route accommodates MR connectivity - the MAX6385XS46D1-T pinout differs functionally despite identical physical footprint.
MAX6385XS46D1-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:
- 4.63V
- 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
MAX6385XS46D1-T FAQ
1.How can I place an order for MAX6385XS46D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS46D1-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 MAX6385XS46D1-T reliable?
The price and inventory of MAX6385XS46D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS46D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS46D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS46D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS46D1-T?
MAX6385XS46D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS46D1-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 MAX6385XS46D1-T?
For technical support, including MAX6385XS46D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS46D1-T requirements.
6.How does Aetrix verify that MAX6385XS46D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS46D1-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 MAX6385XS46D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS46D1-T?
All MAX6385XS46D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS46D1-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 MAX6385XS46D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS46D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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