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Analog Devices Inc./Maxim Integrated MAX6385XS28D1-T
- Part No.:
- MAX6385XS28D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS28D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,540
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Product details
Overview
MAX6385XS28D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.80V VCC reset threshold (±2.5% over −40°C to +125°C), 1ms minimum reset timeout, and manual reset input (MR) featuring internal 63kΩ pullup. It monitors single supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS28D1-T datasheet, MAX6385XS28D1-T pinout, MAX6385XS28D1-T application, or MAX6385XS28D1-T equivalent, key selection factors include its 2.80V threshold accuracy, 1ms reset delay, MR debounce capability, guaranteed reset validity down to VCC = 1V, and compatibility with SC70-4 packaging for space-constrained designs.
Technical Context
The MAX6385XS28D1-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 is debounced via internal logic and features TTL/CMOS-compatible thresholds with 1µs minimum pulse width support.
It operates across full industrial temperature range (−40°C to +125°C) with supply current as low as 3μA at 1.8V and guarantees correct reset output state down to VCC = 1V - enabling robust operation during deep brownout conditions without external supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V ±2.5% (−40°C to +125°C); ensures accurate detection of 2.8V rail collapse before μP malfunction |
| Reset Timeout | 1ms min; provides sufficient hold time for microcontroller initialization after power stabilization |
| Supply Current | 3μA at 1.8V; enables multi-year battery life in always-on portable instrumentation |
| Reset Output Type | Active-high push-pull; drives high without external pullup, compatible with standard μP reset inputs |
| MR Input | Debounced active-low with 63kΩ internal pullup; supports direct switch connection without external RC |
| VCC Operating Range | 1.0V to 5.5V; functions during deep undervoltage, ensuring reset remains valid until full power recovery |
| Reset Propagation Delay | 35μs max (VCC falling); fast response to transient glitches on monitored supply |
Pinout & Package
MAX6385XS28D1-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 | Power supply input | Monitored voltage source; powers internal circuitry and sets reset threshold reference |
| 2 - GND | Ground reference | Return path for all internal currents; must be low-impedance to ensure comparator accuracy |
| 3 - MR | Manual reset input | Active-low signal; forces reset when pulled below 0.3×VCC; internally pulled up to VCC |
| 4 - RESET | Active-high push-pull output | Drives high during reset assertion; sinks current when deasserted; no external pullup required |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.80V with ±2.5% tolerance over full temperature range - eliminates external resistor network calibration |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V - prevents undefined states during brownout recovery |
| Integrated MR debounce | No external components needed; 1µs minimum MR pulse width and 100ns glitch rejection enable direct switch interface |
| Negative-going transient immunity | Withstands VCC glitches ≤35μs at 100mV overdrive - suppresses false resets from EMI or switching noise |
| Low quiescent current | 3μA at 1.8V - extends battery runtime in IoT sensors and wearables without sacrificing supervision integrity |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with 2.8V LDO output. IC Role / Device Role / Timing Role: Supervises 2.8V rail and asserts active-high RESET to ARM Cortex-M0+ during startup/brownout. Use Value: 1ms timeout ensures full core initialization; 3μA ICC preserves >5-year battery life. | Use Scenario: DIN-rail mounted digital input module operating from 24V DC converted to 2.8V logic rail. IC Role / Device Role / Timing Role: Monitors isolated 2.8V domain and triggers system-wide reset via MR button press. Use Value: MR debounce and 63kΩ pullup eliminate BOM cost of external RC network. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Low-voltage subsystem (e.g., interior lighting controller) supplied from 2.8V buck converter. IC Role / Device Role / Timing Role: Provides AEC-Q100-compliant reset signaling to MCU during cold-crank voltage sag. Use Value: ±2.5% threshold accuracy over −40°C to +125°C ensures consistent trip point across vehicle lifetime. | Use Scenario: AMI meter with dual-supply architecture: 3.3V MCU and 2.8V metrology ADC. IC Role / Device Role / Timing Role: Resets MCU only when 2.8V metrology rail fails - independent of 3.3V domain. Use Value: Dedicated 2.8V threshold avoids unnecessary resets caused by 3.3V rail transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS28D2-T | 20ms reset timeout (vs. 1ms) | Suitable for systems requiring longer reset hold time for complex boot sequences | Select when extended reset assertion is needed for peripheral initialization or flash programming |
| MAX6326XR28D1-T | Same 2.80V threshold and 1ms timeout, but push-pull active-low output | Requires inverted reset logic on host MCU; incompatible with active-high reset inputs | Choose only if target microcontroller accepts active-low reset and board layout allows signal inversion |
Compared with MAX6385XS28D1-T, the MAX6385XS28D2-T extends reset duration for demanding boot flows, while the MAX6326XR28D1-T changes reset polarity - both require validation of timing margins and MCU reset pin compatibility before substitution.
Availability
MAX6385XS28D1-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS28D1-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, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervision for space- and power-constrained microprocessor systems - targeting battery-operated instrumentation, automotive submodules, and industrial edge nodes.
FAQ
What is the exact reset threshold voltage of MAX6385XS28D1-T and how stable is it over temperature?
The MAX6385XS28D1-T has a factory-set reset threshold of 2.80V, specified with ±2.5% tolerance over the full operating temperature range of −40°C to +125°C. This stability is achieved using a precision bandgap reference and laser-trimmed resistors, ensuring consistent trip points across automotive and industrial environments without external calibration.
Does MAX6385XS28D1-T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6385XS28D1-T includes a debounced manual reset (MR) input with an internal 63kΩ pullup resistor to VCC. MR is active-low: it asserts reset when driven below 0.3×VCC and releases after a 1ms timeout once released. The pin accepts TTL/CMOS logic levels and requires no external components - a simple momentary switch to GND suffices.
Can MAX6385XS28D1-T operate reliably when VCC drops below 1.8V?
Yes, MAX6385XS28D1-T is fully functional down to VCC = 1.0V and guarantees valid RESET output state (logically correct high/low) down to VCC = 1V. At 1.8V, its supply current is only 3μA, and its reset comparator continues accurate monitoring - making it suitable for deep brownout recovery in battery-backed systems.
What package type and dimensions does MAX6385XS28D1-T use, and is it RoHS-compliant?
MAX6385XS28D1-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm lead pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. Its small footprint supports high-density layouts in portable and automotive electronics.
How does the 1ms reset timeout of MAX6385XS28D1-T compare to other members of the MAX6381–MAX6390 family?
The 1ms reset timeout (denoted by "D1" in the part number) is the shortest standard option in the MAX6381–MAX6390 family. It is ideal for fast-boot microcontrollers like ARM Cortex-M0+, where extended reset hold times are unnecessary. Other variants offer 20ms, 140ms, up to 1200ms timeouts - selected via the "D" suffix in the ordering code.
MAX6385XS28D1-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:
- 2.8V
- 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
MAX6385XS28D1-T FAQ
1.How can I place an order for MAX6385XS28D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS28D1-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 MAX6385XS28D1-T reliable?
The price and inventory of MAX6385XS28D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS28D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS28D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS28D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS28D1-T?
MAX6385XS28D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS28D1-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 MAX6385XS28D1-T?
For technical support, including MAX6385XS28D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS28D1-T requirements.
6.How does Aetrix verify that MAX6385XS28D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS28D1-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 MAX6385XS28D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS28D1-T?
All MAX6385XS28D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS28D1-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 MAX6385XS28D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS28D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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