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Analog Devices Inc./Maxim Integrated MAX6385XS22D5-T
- Part No.:
- MAX6385XS22D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS22D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
MAX6385XS22D5-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.19V reset threshold (±2.5% over −40°C to +125°C), 280ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage (VCC) in battery-powered microcontroller systems and asserts RESET when VCC drops below threshold or MR is pulled low.
For engineers reviewing the MAX6385XS22D5-T datasheet, MAX6385XS22D5-T pinout, MAX6385XS22D5-T application, or MAX6385XS22D5-T equivalent, key selection criteria include guaranteed valid reset output down to VCC = 1V, 3μA supply current at 1.8V, 4-pin SC70 package compatibility, and automotive-grade AEC-Q100 qualification (denoted by /V suffix - though this specific part lacks /V, it shares identical thermal and electrical specs with /V variants).
Technical Context
The MAX6385XS22D5-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across −40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 280ms (min) reset timeout after VCC recovery or MR release.
It features an internal 63kΩ pullup on MR, supports TTL/CMOS-compatible manual reset triggering, and guarantees correct RESET logic state for VCC ≥ 1V - enabling reliable brownout detection in ultra-low-voltage embedded systems without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V (nominal), ±2.5% over −40°C to +125°C - ensures accurate brownout detection across automotive and industrial temperature ranges |
| VCC Reset Timeout | 280ms (minimum) - provides sufficient hold time for microcontroller initialization after power recovery |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports direct monitoring of core rails (1.2V, 1.8V, 3.3V) and I/O supplies |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and reduces BOM count |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external RC network |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset assertion during deep brownout conditions |
Pinout & Package
MAX6385XS22D5-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, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be decoupled with 0.1μF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - drives microcontroller RESET pin directly; sinks 1.2mA at VCC ≥ 2.5V |
| 3 | MR | Active-low manual reset input - internal 63kΩ pullup to VCC; requires <0.3×VCC to assert reset |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.19V with ±2.5% tolerance over full temperature range - eliminates need for external resistor divider calibration |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on sensor nodes beyond 10 years (typical) |
| Guaranteed reset validity at low VCC | Operates correctly down to VCC = 1V - prevents spurious resets during slow power ramp-down |
| Integrated MR pullup | 63kΩ internal resistor - enables direct switch-to-GND implementation without discrete components |
| Negative-going VCC transient immunity | Rejects glitches ≤100ns at 100mV overdrive - improves robustness in electrically noisy environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell, requiring reliable power-on reset and user-initiated recalibration. IC Role / Device Role / Timing Role: Supervises 1.8V MCU core rail and asserts active-high RESET to initialize firmware upon power-up or button press. Use Value: 3μA supply current extends battery life to >5 years; 280ms timeout ensures complete bootloader execution before peripheral enable. | Use Scenario: DIN-rail mounted analog input module operating in factory ambient (−25°C to +70°C) with 3.3V isolated supply. IC Role / Device Role / Timing Role: Monitors 3.3V VCC rail and provides fail-safe reset to ARM Cortex-M4 processor during line sags or ESD events. Use Value: ±2.5% threshold accuracy prevents false resets at temperature extremes; push-pull output eliminates pullup resistor, reducing thermal drift in precision measurement paths. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Low-voltage subsystem (e.g., door module) powered from 5V pre-regulator, requiring AEC-Q100–compliant supervision. IC Role / Device Role / Timing Role: Resets 16-bit MCU on VCC brownout or service technician-triggered MR pulse via diagnostic port. Use Value: Identical electrical specs and package as /V-qualified versions - enables drop-in qualification reuse in non-safety-critical modules. | Use Scenario: Wi-Fi-connected thermostat using Li-ion backup during AC outage, needing deterministic reset during battery switchover. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and asserts RESET during 1.8V→3.3V LDO transition to prevent firmware corruption. Use Value: Guaranteed RESET validity down to VCC = 1V ensures clean reset even during LDO dropout; 280ms timeout accommodates slow battery charger response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS22D3-T | Same 2.19V threshold and MR function, but 140ms VCC reset timeout (vs. 280ms) | Suitable for faster-boot MCUs where shorter reset hold time is acceptable | Select when system boot sequence completes in <150ms and tighter timing margin is required |
| TLV803EA22DBZR | 2.2V threshold (±1%), 200ms timeout, SOT-23-3 package, no MR input | Lacks manual reset capability and uses smaller 3-pin footprint - limits flexibility in field-serviceable designs | Choose only if MR is unnecessary and board space is constrained to ≤1.3mm² |
Compared with MAX6385XS22D3-T and TLV803EA22DBZR, the MAX6385XS22D5-T provides optimal balance of extended reset hold time (280ms), integrated manual reset, and compact 4-pin SC70 packaging - making it ideal for battery-powered controllers requiring both reliability and serviceability.
Availability
MAX6385XS22D5-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS22D5-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 for battery-operated and harsh-environment systems - prioritizing threshold stability, ultra-low current, and robust glitch immunity.
FAQ
What is the exact reset threshold voltage of MAX6385XS22D5-T and how stable is it over temperature?
The MAX6385XS22D5-T has a nominal reset threshold of 2.19V, with guaranteed tolerance of ±2.5% across −40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning threshold drift is limited to ±0.013V over the full range. This stability is confirmed in the Electrical Characteristics table (page 3 of the datasheet) and validated by the "Normalized Reset Threshold vs. Temperature" graph (toc04).
Does MAX6385XS22D5-T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6385XS22D5-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup to VCC. To assert reset, MR must be driven below 0.3×VCC (e.g., <0.54V at VCC = 1.8V). The MR input accepts TTL/CMOS logic levels and tolerates pulses as short as 1μs. No external components are needed - a momentary switch from MR to GND suffices.
What is the minimum supply voltage at which MAX6385XS22D5-T guarantees correct RESET output behavior?
MAX6385XS22D5-T guarantees valid RESET output logic state down to VCC = 1.0V. Below this, the internal circuitry cannot maintain defined output levels. This specification is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables (page 2–3), and confirmed in the "Ensuring a Valid RESET Output Down to VCC = 0V" application note (page 7).
Is MAX6385XS22D5-T pin-compatible with older Maxim reset ICs like MAX809?
Yes, MAX6385XS22D5-T is pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series in the same 4-pin SC70 package. Pin mapping (VCC, RESET, MR, GND) matches exactly, enabling direct replacement without PCB modification - as confirmed in the Features section (page 1) and Selector Guide (page 9).
What package type and dimensions does MAX6385XS22D5-T use, and where can I find the land pattern?
MAX6385XS22D5-T uses a 4-pin SC70 package (outline number 21-0098, package code X4+1), measuring 2.0mm × 2.1mm × 0.95mm. The recommended land pattern is 90-0187, available at maximintegrated.com/packages. Thermal resistance is θJA = 322.6°C/W on a multilayer board - critical for thermal design in sealed enclosures.
MAX6385XS22D5-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:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS22D5-T FAQ
1.How can I place an order for MAX6385XS22D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS22D5-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 MAX6385XS22D5-T reliable?
The price and inventory of MAX6385XS22D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS22D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS22D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS22D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS22D5-T?
MAX6385XS22D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS22D5-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 MAX6385XS22D5-T?
For technical support, including MAX6385XS22D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS22D5-T requirements.
6.How does Aetrix verify that MAX6385XS22D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS22D5-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 MAX6385XS22D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS22D5-T?
All MAX6385XS22D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS22D5-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 MAX6385XS22D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS22D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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