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Analog Devices Inc./Maxim Integrated MAX6385XS22D1-T
- Part No.:
- MAX6385XS22D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS22D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,454
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Product details
Overview
MAX6385XS22D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.19V reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, and manual reset input. It monitors VCC from +1.0V to +5.5V while consuming only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - ideal for battery-powered microcontroller power-up sequencing in portable instrumentation.
For engineers reviewing the MAX6385XS22D1-T datasheet, MAX6385XS22D1-T pinout, MAX6385XS22D1-T application, or MAX6385XS22D1-T equivalent, key selection criteria include its 4-pin SC70 package, 2.19V threshold accuracy, 1ms reset delay, MR input with internal 63kΩ pullup, and guaranteed operation across automotive temperature range (-40°C to +125°C).
Technical Context
The MAX6385XS22D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over full temperature range and 60ppm/°C tempco, paired with a monolithic RC timer for deterministic 1ms reset assertion after VCC recovery. Its active-high push-pull output drives logic-level loads directly without external components.
It integrates a debounced manual reset input (MR) with 1μs minimum pulse width and 100ns glitch rejection, internally pulled up to VCC via 63kΩ resistor. The device asserts reset on VCC drop below 2.19V or MR low, holding reset active for ≥1ms after VCC exceeds threshold or MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V nominal (±2.5% over -40°C to +125°C); ensures reliable brownout detection for 2.2V-core systems |
| Reset Timeout | 1ms minimum; provides sufficient hold time for microcontroller initialization before code execution |
| Supply Current | 3μA at +1.8V; enables multi-year battery life in always-on monitoring applications |
| Operating Voltage | +1.0V to +5.5V; supports valid reset assertion even during deep brownout conditions |
| Output Type | Active-high push-pull; eliminates need for external pullup resistor and reduces BOM count |
| Manual Reset | MR input with 63kΩ internal pullup; allows momentary switch interface without external biasing |
| Temp Range | -40°C to +125°C; qualified for industrial and automotive under-hood environments |
Pinout & Package
MAX6385XS22D1-T is housed in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, with 0.65mm pin pitch and RoHS-compliant lead-free finish.
| 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; drives high during reset assertion, low otherwise; compatible with standard CMOS inputs |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
| 4 | MR | Active-low manual reset input; initiates reset when pulled ≤0.3×VCC; internally pulled up to VCC via 63kΩ resistor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.19V with ±2.5% tolerance over full temperature range - eliminates external resistor divider and calibration effort |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery life in portable medical and sensor nodes beyond 10 years |
| Deterministic 1ms reset timeout | Guaranteed minimum duration ensures microcontroller core and peripherals stabilize before release |
| Integrated MR pullup resistor | 63kΩ internal pullup enables direct connection of momentary switch to GND - no external components required |
| VCC-operated reset validity | Reset output remains logic-valid down to VCC = 1V - prevents spurious release during deep undervoltage events |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery, requiring reliable wake-up and fault-safe reset during voltage sag. IC Role / Device Role / Timing Role: Supervises VCC rail and triggers hard reset if voltage drops below 2.19V during RF transmission burst. Use Value: 3μA supply current extends battery life to >5 years; 1ms timeout ensures ADC and BLE radio initialize fully before firmware launch. | Use Scenario: Smart agriculture soil moisture sensor deployed in remote fields, operating intermittently on lithium-thionyl chloride cell. IC Role / Device Role / Timing Role: Monitors main supply and asserts active-high RESET to ESP32 microcontroller upon cold-start or brownout. Use Value: Active-high push-pull output eliminates external pullup; MR pin enables field technician-initiated recalibration via tactile switch. |
| Industrial Programmable Logic Controllers | Automotive Body Control Modules |
Use Scenario: DIN-rail mounted PLC with dual 3.3V/5V rails, needing deterministic reset coordination across FPGA and ARM Cortex-M7. IC Role / Device Role / Timing Role: Provides synchronized reset pulse to both domains using single 2.19V threshold aligned to 3.3V I/O rail. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents false resets in uncontrolled cabinet environments. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting, subject to load-dump transients and cold-cranking. IC Role / Device Role / Timing Role: Resets microcontroller during battery voltage collapse (<2.19V) caused by starter motor engagement. Use Value: Negative-going transient immunity (up to 150µs at 100mV overdrive) suppresses false resets during cranking noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS22D2-T | Same 2.19V threshold and 4-pin SC70 package, but 20ms reset timeout instead of 1ms | Suitable for systems requiring longer reset hold time for complex peripheral initialization | Select MAX6385XS22D2-T only if firmware requires >1ms reset assertion; otherwise MAX6385XS22D1-T minimizes boot latency. |
| TLV803EB22DBZR | 2.2V threshold (±1%), SOT-23-3 package, no MR input, 140ms timeout, 0.5μA supply current | Lacks manual reset capability and uses smaller footprint; optimized for ultra-low-power, single-rail applications | Choose TLV803EB22DBZR when MR is unnecessary and 140ms timeout suffices; MAX6385XS22D1-T preferred where user-initiated reset is mandatory. |
Compared with MAX6385XS22D2-T and TLV803EB22DBZR, MAX6385XS22D1-T uniquely balances minimal boot delay (1ms), integrated manual reset, and industrial temperature support - making it optimal for responsive embedded systems requiring field serviceability and rapid startup.
Availability
MAX6385XS22D1-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial programmable logic controllers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS22D1-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 industrial, automotive, and computing markets, emphasizing reliability, low power, and integration.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting space-constrained, battery-sensitive applications where deterministic reset timing and guaranteed operation down to 1V are critical.
FAQ
What is the exact reset threshold voltage of MAX6385XS22D1-T and how tightly is it specified?
The MAX6385XS22D1-T has a factory-set nominal reset threshold of 2.19V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official datasheet, and the threshold is trimmed during production to meet this tolerance without requiring external calibration. The MAX6385XS22D1-T maintains this precision due to its bandgap reference and low-tempco design.
Does MAX6385XS22D1-T support manual reset functionality, and what are the electrical requirements for the MR pin?
Yes, MAX6385XS22D1-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, MR must be driven low to ≤0.3×VCC (for VTH < 4V) with a minimum pulse width of 1μs. The pin rejects glitches shorter than 100ns and features 200ns propagation delay from MR release to RESET deassertion. No external components are needed unless enhanced noise immunity is required - then a 0.1μF capacitor from MR to GND is recommended.
What package type and dimensions does MAX6385XS22D1-T use, and is it RoHS-compliant?
MAX6385XS22D1-T is packaged in a 4-pin SC70 (SOT-323) outline with dimensions of 2.0mm × 2.1mm × 0.95mm and 0.65mm pin pitch. The package code is X4+1, outline number 21-0098, and land pattern 90-0187. It carries a '+' suffix indicating lead(Pb)-free and RoHS-compliant construction, verified per JEDEC J-STD-020 moisture sensitivity level 1 handling requirements.
How does MAX6385XS22D1-T behave when VCC drops below 1.0V, and what is its minimum functional supply voltage?
MAX6385XS22D1-T guarantees correct reset output logic state down to VCC = 1.0V, meaning RESET remains asserted (high) as long as VCC stays below 2.19V - even if VCC collapses further. Below 1.0V, the device ceases operation and RESET output becomes undefined. This 1.0V lower limit is specified in Absolute Maximum Ratings and Electrical Characteristics, ensuring robust behavior during deep brownout events common in battery-depleted systems.
Is MAX6385XS22D1-T pin-compatible with any legacy Maxim reset ICs, and which ones?
Yes, MAX6385XS22D1-T is pin-compatible with the MAX809, MAX810, MAX803, MAX6326–MAX6328, MAX6346–MAX6348, and MAX6711–MAX6713 families in the same 4-pin SC70 configuration. This compatibility is explicitly stated in the Features section of the datasheet and validated across shared pin functions: Pin 1 = VCC, Pin 2 = RESET, Pin 3 = GND, Pin 4 = MR. Layout reuse is possible, though designers must verify timing and threshold alignment for their specific application.
MAX6385XS22D1-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:
- 2.19V
- 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
MAX6385XS22D1-T FAQ
1.How can I place an order for MAX6385XS22D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS22D1-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 MAX6385XS22D1-T reliable?
The price and inventory of MAX6385XS22D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS22D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS22D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS22D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS22D1-T?
MAX6385XS22D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS22D1-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 MAX6385XS22D1-T?
For technical support, including MAX6385XS22D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS22D1-T requirements.
6.How does Aetrix verify that MAX6385XS22D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS22D1-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 MAX6385XS22D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS22D1-T?
All MAX6385XS22D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS22D1-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 MAX6385XS22D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS22D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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