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Analog Devices Inc./Maxim Integrated MAX6385XS43D3-T
- Part No.:
- MAX6385XS43D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS43D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,050
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Product details
Overview
MAX6385XS43D3-T from Maxim Integrated is a precision active-high push-pull μP supervisory circuit designed for reliable power-on reset and brownout detection in low-voltage embedded systems. It features a factory-set 4.30V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and consumes only 3μA at 1.8V. Used in microcontroller-based controllers and portable equipment where deterministic reset timing and ultra-low quiescent current are critical.
For engineers reviewing the MAX6385XS43D3-T datasheet, MAX6385XS43D3-T pinout, MAX6385XS43D3-T application, or MAX6385XS43D3-T equivalent, key selection criteria include its 4.30V threshold accuracy, 140ms reset timeout, active-high push-pull output, integrated manual reset input with internal pullup, and 4-pin SC70 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6385XS43D3-T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 4.30V threshold, with guaranteed operation down to VCC = 1.0V. Its internal timer generates a precise 140ms (minimum) reset assertion period after VCC recovers above threshold.
It integrates a debounced active-low manual reset input (MR) with a 63kΩ internal pullup resistor, enabling external reset initiation without external components. The active-high push-pull RESET output drives directly into microcontroller reset inputs without requiring external pullup or pulldown resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.30V nominal, ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive and industrial temperature ranges. |
| Reset Timeout Period | 140ms minimum - guarantees sufficient reset hold time for full microcontroller initialization before release. |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in always-on portable and IoT sensor nodes. |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct interface to standard CMOS/TTL reset inputs. |
| Manual Reset Input | Active-low MR with 63kΩ internal pullup - allows momentary switch connection without external biasing; glitch rejection ≥100ns. |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1.0V VCC. |
| Reset Output Validity | Guaranteed logic state for VCC ≥ 1.0V - prevents metastability or undefined reset states during power ramp-down. |
Pinout & Package
MAX6385XS43D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for high-density PCB layouts with 0.65mm pitch and 1.3mm × 1.1mm footprint.
| Pin | 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 upon timeout completion. |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for stable comparator operation. |
| 4 | MR | Active-low manual reset input; pulling low forces immediate reset assertion and holds reset for 140ms after release. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.30V threshold | Eliminates external resistor divider calibration and reduces BOM count in voltage-monitoring designs. |
| 140ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for microcontroller reset hold time under slow-ramp power-up conditions. |
| Active-high push-pull output | Directly interfaces with ARM Cortex-M, PIC, AVR, and RISC-V MCU reset pins without level-shifting or passive components. |
| Integrated MR pullup (63kΩ) | Enables single-pole momentary switch implementation with no external resistor, reducing layout area and assembly cost. |
| −40°C to +125°C operation | Qualified for under-hood automotive, industrial PLC, and outdoor edge-node applications without derating. |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Programmable logic controller (PLC) CPU module requiring fail-safe reset during 24V DC supply fluctuations. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail derived from 24V input; asserts active-high RESET to ARM Cortex-A53 during undervoltage events. Use Value: 4.30V threshold precisely matches 3.3V LDO dropout margin, while 140ms timeout exceeds boot ROM execution time by 3×. |
Use Scenario: Battery-powered glucose meter with cold-start capability below 1.8V battery voltage. IC Role / Device Role / Timing Role: Supervises 1.8V core rail and provides clean reset pulse to MSP430FR59xx MCU during power-up from depleted Li-ion cell. Use Value: 3μA supply current extends shelf life to >5 years; valid reset output down to VCC = 1.0V prevents boot failure at end-of-life battery voltage. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: BCM microcontroller reset coordination during ignition cycling and load-dump transients. IC Role / Device Role / Timing Role: Detects 5.0V supply sag below 4.30V during cranking; uses MR pin for diagnostic reset via CAN command. Use Value: Negative-going transient immunity up to 350µs at 100mV overdrive prevents spurious resets during alternator switching noise. |
Use Scenario: Revenue-grade electricity meter requiring tamper-resistant power-fail detection and secure firmware recovery. IC Role / Device Role / Timing Role: Monitors 3.3V RTC and communication rail; triggers hardware reset on AC loss to initiate secure flash rollback sequence. Use Value: ±2.5% threshold accuracy over temperature ensures consistent trip point across −25°C to +70°C field operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS43D3+T | Same electrical specs and 4-pin SC70 package; differs only in RoHS compliance marking (+T vs. -T suffix). | No functional difference; both support identical operating conditions and pinout. | Select MAX6385XS43D3-T for lead-free compliance with full traceability documentation required by OEMs. |
| TPS3808G33DBVR | 3.3V threshold (not 4.3V); 200ms timeout; SOT-23-5 package; higher 8μA ICC at 1.8V. | Suitable for 3.3V-only systems but cannot replace MAX6385XS43D3-T in 4.3V threshold applications without redesign. | Choose only if redesigning for lower threshold and accepting larger footprint and higher quiescent current. |
Compared with MAX6385XS43D3-T, the MAX6385XS43D3+T offers identical performance with alternate RoHS marking, while TPS3808G33DBVR requires board-level changes due to different threshold, timeout, package, and supply current - making it unsuitable as a drop-in replacement.
Availability
MAX6385XS43D3-T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS43D3-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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers ultra-low-power μP supervisory circuits optimized for battery-operated and thermally harsh environments, featuring factory-trimmed thresholds, wide temperature operation, and compact packaging.
FAQ
What is the exact reset threshold voltage of the MAX6385XS43D3-T?
The MAX6385XS43D3-T has a factory-set nominal reset threshold of 4.30V, with guaranteed tolerance of ±2.5% over the full operating temperature range of −40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet and applies specifically to the "43" suffix in the part number.
Does the MAX6385XS43D3-T support manual reset functionality?
Yes, the MAX6385XS43D3-T includes an active-low manual reset input (MR) with a 63kΩ internal pullup resistor. Driving MR low forces immediate reset assertion, and the device holds RESET high for the full 140ms timeout period after MR is released - a feature confirmed in the Pin Description and Features sections.
What package type and footprint does the MAX6385XS43D3-T use?
The MAX6385XS43D3-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.1mm with 0.65mm pin pitch. This is explicitly stated in the Ordering Information table and Pin Configurations section of the datasheet.
Is the MAX6385XS43D3-T compatible with microcontrollers requiring active-high reset inputs?
Yes, the MAX6385XS43D3-T features an active-high push-pull RESET output, meaning it drives high during reset and low otherwise. This directly matches the active-high reset input requirement of MCUs such as STM32L4, NXP Kinetis, and Silicon Labs EFM32, eliminating need for inverters or pullup resistors.
What is the minimum supply voltage at which the MAX6385XS43D3-T guarantees valid reset output logic levels?
The MAX6385XS43D3-T guarantees correct RESET output logic state for VCC ≥ 1.0V, as specified in the Absolute Maximum Ratings and Detailed Description sections. Below 1.0V, output behavior is not guaranteed - a critical design boundary for battery-depletion scenarios.
MAX6385XS43D3-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:
- 4.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS43D3-T FAQ
1.How can I place an order for MAX6385XS43D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS43D3-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 MAX6385XS43D3-T reliable?
The price and inventory of MAX6385XS43D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS43D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS43D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS43D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS43D3-T?
MAX6385XS43D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS43D3-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 MAX6385XS43D3-T?
For technical support, including MAX6385XS43D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS43D3-T requirements.
6.How does Aetrix verify that MAX6385XS43D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS43D3-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 MAX6385XS43D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS43D3-T?
All MAX6385XS43D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS43D3-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 MAX6385XS43D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS43D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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