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Analog Devices Inc./Maxim Integrated MAX6385XS34D1-T
- Part No.:
- MAX6385XS34D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS34D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,516
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Product details
Overview
MAX6385XS34D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.40V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and integrated debounced manual reset input (MR). It monitors single supply voltage in battery-powered embedded systems, ensuring reliable μP initialization during power-up, brownout, or operator-triggered reset events.
For engineers reviewing the MAX6385XS34D1-T datasheet, MAX6385XS34D1-T pinout, MAX6385XS34D1-T application, or MAX6385XS34D1-T equivalent, key selection criteria include reset polarity compatibility, MR timing behavior (140ms timeout), guaranteed reset validity down to VCC = 1V, and SC70-4 package footprint constraints for space-constrained designs.
Technical Context
The MAX6385XS34D1-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 140ms minimum reset assertion period after VCC recovers above 3.40V or after MR release.
It features an internal 63kΩ pullup on the MR pin, accepts TTL/CMOS-compatible logic levels, and guarantees correct RESET output state down to VCC = 1V. The active-high push-pull output drives high during reset assertion and sinks ≤0.3V at 1.2mA when deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.40V nominal (±2.5% over -40°C to +125°C); ensures reliable detection of 3.3V rail brownout |
| VCC Reset Timeout | 140ms minimum; holds μP in reset long enough for stable clock and supply settling |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset signaling even during deep brownout recovery |
| Reset Output Type | Active-high push-pull; eliminates need for external pullup resistor on RESET line |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup; allows momentary switch interface without external RC |
| Package | 4-pin SC70 (X4+1 outline); 1.6mm × 1.6mm footprint for ultra-compact PCB layouts |
Pinout & Package
MAX6385XS34D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for high-density portable applications. Pin 1 is RESET (active-high push-pull), Pin 2 is VCC, Pin 3 is MR (active-low manual reset), and Pin 4 is GND.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; asserts high during reset condition and remains high for full 140ms timeout |
| 2 | VCC | Main supply input and monitored voltage source; powers internal circuitry and reset comparator |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; forces reset when pulled to GND |
| 4 | GND | Reference ground for all internal comparators, timers, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.40V with ±2.5% tolerance over full automotive temperature range (-40°C to +125°C) |
| Guaranteed reset validity | RESET output state fully defined down to VCC = 1V, enabling robust low-voltage brownout response |
| Integrated MR debounce | No external RC required; internal 63kΩ pullup and 1µs glitch rejection eliminate switch bounce artifacts |
| Negative-going transient immunity | Rejects VCC glitches ≤35µs wide at 100mV overdrive, reducing false resets in noisy power environments |
| Low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on sensor nodes with 220mAh coin cells |
Applications
| Industrial PLC I/O Module | Medical Wearable Sensor Hub |
|---|---|
|
Use Scenario: Power cycling during field firmware updates and ESD-induced supply droop in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Supervises 3.3V I/O rail and triggers controlled μP reset via MR button; provides 140ms hold time for FPGA configuration stability. Use Value: Prevents partial register writes during brownout by guaranteeing reset assertion until supply settles, eliminating corrupted control outputs. |
Use Scenario: Intermittent battery voltage sag during RF transmission bursts in Bluetooth LE pulse oximeters. IC Role / Device Role / Timing Role: Monitors 3.0V core supply; asserts active-high RESET to halt MCU execution until voltage recovers above 3.40V. Use Value: Ensures sensor data integrity by blocking ADC sampling and BLE packet transmission during sub-threshold supply conditions. |
| Automotive Body Control Module | Smart Home Zigbee Router |
|
Use Scenario: Load dump transients and cold-crank voltage dips in 12V-to-3.3V converted domains. IC Role / Device Role / Timing Role: Provides AEC-Q100–qualified supervision of microcontroller supply; MR pin enables service-mode reset via diagnostic port. Use Value: Meets ISO 16750-2 pulse 4a/b immunity requirements through 35µs glitch rejection and 140ms timeout margin. |
Use Scenario: Unplanned AC adapter disconnection and capacitor discharge decay in always-on mesh routers. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse and asserts RESET to prevent flash corruption during power-fail write cycles. Use Value: Eliminates need for supercapacitor backup by guaranteeing safe shutdown within 140ms before VCC drops below 2.5V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS34D2-T | 20ms reset timeout vs. 140ms; identical threshold, package, and MR functionality | Suitable for fast-recovery systems where shorter reset hold time prevents boot delay penalties | Select when system clock stabilization completes in <20ms and faster restart is prioritized over noise margin |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), 200ms timeout, 1.8V–6.0V operating range, SOT-23-5 package | Requires external pullup for open-drain reset; lacks integrated MR pullup; higher 8μA ICC at 3.6V | Choose when tighter threshold accuracy is critical and board space allows SOT-23-5; verify MR interface compatibility |
Compared with MAX6385XS34D1-T, the MAX6385XS34D2-T offers faster reset release but reduced noise immunity, while the TPS3808G33DBVR provides superior threshold precision at the cost of higher supply current and no native MR pullup-requiring redesign of reset-button interface circuitry.
Availability
MAX6385XS34D1-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensor hubs, automotive body control units, smart home routers, and battery-powered instrumentation requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX6385XS34D1-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-current microprocessor supervisors for space- and power-constrained systems, targeting applications where guaranteed reset behavior under brownout and transient conditions is mission-critical.
FAQ
What is the exact reset threshold voltage of the MAX6385XS34D1-T?
The MAX6385XS34D1-T has a factory-set nominal reset threshold of 3.40V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "34" corresponds to 3.40V (min 3.32V, nom 3.40V, max 3.49V).
Does the MAX6385XS34D1-T support manual reset functionality?
Yes, the MAX6385XS34D1-T includes a debounced manual reset input (MR) on Pin 3. It features an internal 63kΩ pullup resistor to VCC, accepts TTL/CMOS logic levels, and asserts reset for 140ms after MR is released. No external components are required for basic pushbutton operation.
What package type and footprint does the MAX6385XS34D1-T use?
The MAX6385XS34D1-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm with 0.65mm pitch. This RoHS-compliant package is designated by the "XS" prefix in the part number and is distinct from the 3-pin SC70 or 6-pin μDFN variants in the same family.
Is the MAX6385XS34D1-T compatible with 1.8V supply systems?
Yes, the MAX6385XS34D1-T operates from 1.0V to 5.5V and consumes only 3μA at 1.8V. Its reset output remains valid down to VCC = 1V, making it suitable for ultra-low-voltage applications such as energy-harvesting sensors and coin-cell–powered devices.
How does the reset timeout behavior differ between VCC recovery and manual reset on the MAX6385XS34D1-T?
The MAX6385XS34D1-T uses the same 140ms minimum timeout period for both VCC recovery and MR release - unlike the MAX6390, which separates VCC and MR timeouts. This simplifies timing analysis in systems where consistent reset duration is required regardless of trigger source.
MAX6385XS34D1-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:
- 3.4V
- 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
MAX6385XS34D1-T FAQ
1.How can I place an order for MAX6385XS34D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS34D1-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 MAX6385XS34D1-T reliable?
The price and inventory of MAX6385XS34D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS34D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS34D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS34D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS34D1-T?
MAX6385XS34D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS34D1-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 MAX6385XS34D1-T?
For technical support, including MAX6385XS34D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS34D1-T requirements.
6.How does Aetrix verify that MAX6385XS34D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS34D1-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 MAX6385XS34D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS34D1-T?
All MAX6385XS34D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS34D1-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 MAX6385XS34D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS34D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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