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Analog Devices Inc./Maxim Integrated MAX6385XS24D1-T
- Part No.:
- MAX6385XS24D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS24D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
MAX6385XS24D1-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 2.40V reset threshold, 1ms minimum reset timeout, and manual reset input (MR). It monitors VCC from +1.8V to +5.0V, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in battery-powered microcontroller systems requiring reliable power-on reset and user-initiated recovery.
For engineers reviewing the MAX6385XS24D1-T datasheet, MAX6385XS24D1-T pinout, MAX6385XS24D1-T application, or MAX6385XS24D1-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over –40°C to +125°C), MR debounce capability, SC70-4 package footprint, and compatibility with dual-voltage monitoring architectures.
Technical Context
The MAX6385XS24D1-T implements a precision bandgap-based voltage comparator for VCC monitoring and an internal monostable timer for fixed 1ms reset assertion after VCC recovery. Its MR input features a 63kΩ internal pullup resistor and accepts TTL/CMOS logic levels, enabling direct switch or logic-driven reset initiation without external components.
This device belongs to the MAX6384–MAX6390 family with 4-pin SC70 packaging, active-high push-pull RESET output, and no auxiliary RESET IN function. It is not compatible with dual-supply monitoring or open-drain configurations - those roles are assigned to MAX6387/MAX6388/MAX6389 and MAX6383/MAX6386 respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.40V (nominal), ±2.5% tolerance over –40°C to +125°C - ensures stable reset assertion across automotive and industrial temperature ranges. |
| Reset Timeout | 1ms (minimum) - provides sufficient hold time for microcontroller core initialization without delaying system boot unnecessarily. |
| VCC Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instrumentation. |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset state down to brownout conditions while interfacing with 1.8V, 2.5V, 3.3V, and 5V logic domains. |
| MR Input Pullup | 63kΩ internal resistor - allows direct connection of momentary switch to GND; eliminates need for external pullup and simplifies PCB layout. |
| RESET Output Type | Active-high push-pull - drives high during reset, eliminating external pullup and ensuring fast, rail-to-rail logic transitions into CMOS inputs. |
| Package | 4-pin SC70 (X4+1 outline) - 1.2mm × 1.6mm footprint with 0.65mm pitch, suitable for space-constrained portable designs. |
Pinout & Package
MAX6385XS24D1-T is housed in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), with pins arranged as follows:
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source; powers internal circuitry and feeds reset comparator. |
| 2 | RESET | Active-high push-pull output; asserts high when VCC < 2.40V or MR is pulled low, remains high for ≥1ms after recovery. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ resistor; debounced by design to reject <100ns glitches. |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.40V with ±2.5% accuracy over full temperature range - eliminates need for external resistor dividers or calibration in production. |
| Guaranteed RESET validity down to VCC = 1V | Ensures deterministic microcontroller behavior during deep brownout, avoiding undefined states or partial execution before reset release. |
| Integrated MR pullup resistor | 63kΩ value optimized for low current draw (<100nA standby) while providing robust noise immunity and switch compatibility. |
| Negative-going VCC transient immunity | Rejects sub-10µs transients below reset threshold - prevents spurious resets caused by switching noise or LDO ripple in compact DC/DC layouts. |
| Lead-free, RoHS-compliant SC70 package | Meets IPC/JEDEC J-STD-020 reflow profile (peak 260°C); qualified for automotive AEC-Q100 Grade 2 (–40°C to +105°C ambient). |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Wearable ECG sensor powered by CR2032 coin cell, operating intermittently to extend battery life beyond 3 years. IC Role / Device Role: Monitors VCC during wake-up cycles; asserts RESET if battery voltage drops below 2.40V, preventing corrupted ADC sampling or flash writes. Use Value: 3μA quiescent current extends operational lifetime; 1ms timeout ensures MCU completes RAM retention before entering deep sleep. |
Use Scenario: Environmental data logger deployed in remote field locations, powered by Li-SOCl₂ primary battery with 10-year shelf life. IC Role / Device Role: Provides power-on reset at cold start (–40°C) and detects end-of-life battery sag; MR enables field technician to force firmware update reset. Use Value: ±2.5% threshold accuracy over temperature avoids false resets during seasonal thermal cycling; SC70 footprint minimizes board area. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
|
Use Scenario: DIN-rail mounted I/O expansion module with isolated 3.3V and 5V rails, subject to 24V bus transients. IC Role / Device Role: Supervises 3.3V logic supply; MR tied to diagnostic port for service-mode reset; RESET output drives FPGA configuration enable. Use Value: Push-pull active-high output interfaces directly with FPGA's active-high reset pin; no external pullup reduces BOM count and failure points. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting, operating from vehicle battery (9V–16V) with local 3.3V LDO. IC Role / Device Role: Monitors 3.3V LDO output; asserts RESET on ignition cycle brownout; MR linked to service connector for dealer diagnostics. Use Value: AEC-Q100 qualified version available (/V suffix); 1ms timeout aligns with CAN FD node startup timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS24D2-T | Same 2.40V threshold but 20ms reset timeout (vs. 1ms) | Suitable where longer reset hold time is required for complex peripherals (e.g., Ethernet PHY initialization) | Select for systems needing extended reset assertion; not drop-in - verify timing compliance with MCU reset spec. |
| MAX6326XR24D1-T | Pin-compatible, same 2.40V/1ms spec, but higher 12μA ICC at +1.8V and no MR input | Lacks manual reset functionality; requires external MR circuitry if user-initiated reset is needed | Choose only if MR is unused and lower cost outweighs 4× higher supply current; not recommended for battery-critical designs. |
Compared with MAX6385XS24D1-T, MAX6385XS24D2-T trades faster release for greater timing margin, while MAX6326XR24D1-T sacrifices MR integration and ultra-low power for legacy compatibility - neither offers identical feature parity.
Availability
MAX6385XS24D1-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6385XS24D1-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 power, sensing, and interface applications, with emphasis on low-power, high-reliability solutions for industrial and automotive markets.
The MAX6381–MAX6390 product line delivers single- and dual-supply μP supervisory circuits optimized for space-constrained, battery-sensitive, and thermally demanding embedded systems - with factory-trimmed thresholds, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6385XS24D1-T?
The MAX6385XS24D1-T has a nominal reset threshold of 2.40V, with guaranteed limits of 2.34V (min) and 2.46V (max) at +25°C, and ±2.5% variation over –40°C to +125°C. This value is factory-trimmed and does not require external calibration. The "24" in the part number explicitly denotes the 2.40V threshold per Maxim's ordering guide.
Does MAX6385XS24D1-T support dual-voltage monitoring?
No, MAX6385XS24D1-T monitors only the VCC supply. It lacks the RESET IN pin required for auxiliary voltage monitoring - that function is implemented in MAX6387/MAX6388/MAX6389 variants. The MAX6385XS24D1-T is a single-supply supervisor with dedicated MR input and active-high push-pull RESET output.
What is the minimum VCC voltage at which MAX6385XS24D1-T guarantees correct RESET output state?
MAX6385XS24D1-T guarantees valid RESET output logic state down to VCC = 1.0V. Below this, the output may become indeterminate. This specification ensures reliable reset assertion during deep brownout conditions common in battery-powered systems, and is confirmed in the Electrical Characteristics table under "RESET Output State Guaranteed Valid Down to VCC = 1V".
Can MAX6385XS24D1-T be used in automotive applications?
Yes - the /V automotive-qualified version (e.g., MAX6385XS24D1/V+T) is AEC-Q100 Grade 2 qualified (–40°C to +105°C ambient) and available. The standard MAX6385XS24D1-T operates from –40°C to +125°C junction temperature and meets automotive board-level reliability requirements when used within its specified thermal limits and with appropriate derating.
What package type and dimensions does MAX6385XS24D1-T use?
MAX6385XS24D1-T uses a 4-pin SC70 package (outline 21-0098), measuring 1.2mm × 1.6mm with 0.65mm pin pitch. It is RoHS-compliant (+ suffix), lead-free, and compatible with standard reflow profiles (peak 260°C). Land pattern 90-0187 is recommended for optimal thermal and solder joint reliability.
MAX6385XS24D1-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:
- 2.4V
- 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
MAX6385XS24D1-T FAQ
1.How can I place an order for MAX6385XS24D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS24D1-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 MAX6385XS24D1-T reliable?
The price and inventory of MAX6385XS24D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS24D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS24D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS24D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS24D1-T?
MAX6385XS24D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS24D1-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 MAX6385XS24D1-T?
For technical support, including MAX6385XS24D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS24D1-T requirements.
6.How does Aetrix verify that MAX6385XS24D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS24D1-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 MAX6385XS24D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS24D1-T?
All MAX6385XS24D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS24D1-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 MAX6385XS24D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS24D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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