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Analog Devices Inc./Maxim Integrated MAX6835IXSD2
- Part No.:
- MAX6835IXSD2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835IXSD2.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6835IXSD2 from Maxim Integrated is a micropower voltage supervisor IC designed to monitor +1.2V to +1.8V supply rails in microprocessor and digital systems. It features a factory-set 1.388V reset threshold, 30ms active-low push-pull reset timeout (D2 suffix), debounced manual reset input (MR), and operates down to VCC = 0.55V with 7.5µA typical supply current - enabling reliable power-on reset in portable battery-powered equipment.
For engineers reviewing the MAX6835IXSD2 datasheet, MAX6835IXSD2 pinout, MAX6835IXSD2 application, or MAX6835IXSD2 equivalent, key selection criteria include its SC70-4 package compatibility, ±2.5% threshold accuracy over temperature, immunity to short VCC transients, and support for manual reset assertion without external debounce circuitry.
Technical Context
The MAX6835IXSD2 integrates a precision voltage comparator with hysteresis (0.75% of VTH), a fixed 30ms reset timeout timer, and an internal 20kΩ MR pullup resistor. Its reset logic asserts active-low RESET when VCC falls below 1.388V or MR is pulled low, holding RESET low for exactly 30ms after recovery.
This device uses BiCMOS process technology (681 transistors) and supports operation across –40°C to +85°C. It guarantees valid reset output down to VCC = 0.55V and rejects MR glitches as short as 100ns while requiring only a 2µs minimum MR pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.388V ±2.5% over –40°C to +85°C - ensures accurate brownout detection for 1.5V core supplies |
| Reset Timeout Period | 30ms (D2 option) - provides sufficient hold time for µP initialization before release |
| Supply Current | 7.5µA typical at 1.2V - enables multi-year battery life in always-on monitoring applications |
| VCC Operating Range | 0.55V to 3.6V - guarantees functional reset assertion even during deep brownout conditions |
| MR Input Behavior | Debounced with 20kΩ internal pullup - eliminates need for external RC filter or Schmitt trigger |
| RESET Output Type | Push-pull active-low - drives directly into CMOS inputs without pullup resistor |
| Reset Propagation Delay | 60µs max on VCC fall - ensures fast response to supply collapse |
Pinout & Package
MAX6835IXSD2 is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.5mm pitch), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator |
| 2 | RESET | Active-low push-pull output - sinks current during reset; no external pullup required |
| 3 | MR | Debounced active-low manual reset input - internally pulled up to VCC; asserted by grounding |
| 4 | VCC | Supply voltage input and monitored rail - powers device and serves as reference for threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.388V threshold | Eliminates external resistor divider and calibration effort for 1.5V system monitoring |
| 30ms fixed reset timeout | Matches typical µP reset hold requirements without timing capacitor tolerance drift |
| Debounced MR input | Supports direct connection to mechanical switches or noisy control lines without external filtering |
| ±2.5% threshold accuracy | Ensures consistent trip point across temperature and unit-to-unit variation in low-voltage systems |
| 7.5µA supply current | Reduces quiescent power in always-on supervisory functions - critical for coin-cell applications |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and wearable ECG monitors require guaranteed reset during cold-start and battery sag. IC Role / Device Role / Timing Role: Supervises 1.5V analog front-end and MCU core supply; asserts reset until stable VCC ≥1.388V for ≥30ms. Use Value: Prevents firmware execution errors during weak-battery startup, extending usable battery range by avoiding premature lockup. |
Use Scenario: Remote I/O modules in factory automation must survive 24V DC supply transients and brownouts. IC Role / Device Role / Timing Role: Monitors isolated 1.5V logic rail derived from DC/DC converter; resets controller on VCC dip below 1.388V. Use Value: Maintains deterministic system recovery after line disturbance without requiring watchdog intervention. |
| Low-Power IoT Edge Nodes | Automotive Body Control Modules |
|
Use Scenario: Sub-GHz sensor nodes sleep at 500nA and wake periodically - reset integrity must hold across deep discharge cycles. IC Role / Device Role / Timing Role: Provides power-on reset for ARM Cortex-M0+ MCU powered from 1.5V LDO; operates down to VCC = 0.55V. Use Value: Guarantees clean boot sequence even when battery recovers from <0.8V, preventing corrupted flash writes. |
Use Scenario: BCMs use 1.5V logic for CAN transceivers and LIN interfaces; must reset cleanly during ignition cycling. IC Role / Device Role / Timing Role: Supervises 1.5V domain alongside main 5V/3.3V rails; asserts synchronized reset via shared MR net. Use Value: Enables single-button service reset without additional debounce hardware or firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316HUT46+T | Fixed 4.63V threshold, 140ms timeout, SOT23-5 package | Designed for 5V systems; incompatible with sub-1.8V rails | Select only if monitoring >4.5V supplies - not suitable for MAX6835IXSD2's 1.388V target |
| TLV803EC26DBVR | 2.63V threshold, 200ms timeout, open-drain output, SOT23-3 | Lacks MR input and operates above 1.8V; requires external pullup | Use where higher threshold and longer timeout are acceptable; not drop-in for 1.5V portable designs |
Compared with MAX6835IXSD2, both alternatives lack the combination of ultra-low-voltage operation (≤1.5V), integrated MR debounce, and 30ms push-pull reset - making them unsuitable for direct replacement in space-constrained, battery-powered 1.5V systems.
Availability
MAX6835IXSD2 is available at Aetrix Electronics and suitable for portable medical sensors, low-power IoT edge nodes, and industrial PLC I/O modules requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX6835IXSD2 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) is a U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor supervision in battery-powered and energy-sensitive systems - emphasizing micropower operation, small footprint, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6835IXSD2 and how is it specified?
The MAX6835IXSD2 has a factory-set reset threshold of 1.388V, with ±2.5% accuracy over the full operating temperature range (–40°C to +85°C). This value corresponds to the "I" suffix in the part number and is guaranteed by design - not production-tested at temperature extremes but characterized across the range per Maxim's datasheet Note 1.
Does MAX6835IXSD2 require an external pullup resistor on the RESET pin?
No, MAX6835IXSD2 does not require an external pullup resistor because it features a push-pull active-low RESET output. The internal driver actively pulls RESET low during assertion and high during deassertion - eliminating reliance on external components and simplifying PCB layout.
How does the manual reset (MR) input behave on MAX6835IXSD2?
The MR input on MAX6835IXSD2 is active-low, internally pulled up to VCC with a 20kΩ resistor, and debounced to reject glitches as short as 100ns. A minimum 2µs low pulse forces reset, and reset remains asserted for the full 30ms timeout after MR returns high - no external RC network needed.
Can MAX6835IXSD2 operate reliably when VCC drops below 1.0V?
Yes, MAX6835IXSD2 guarantees valid reset assertion down to VCC = 0.55V. Below this, the push-pull output becomes high-impedance, but within the 0.55V–3.6V range, RESET remains fully functional - critical for detecting brownout in deeply discharged battery scenarios.
What timeout period does the "D2" suffix indicate for MAX6835IXSD2?
The "D2" suffix in MAX6835IXSD2 specifies a 30ms reset active timeout period. This is a fixed, factory-programmed delay that begins when VCC rises above 1.388V or MR is released, ensuring sufficient hold time for microprocessor initialization before releasing the reset signal.
MAX6835IXSD2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.665V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6835IXSD2 FAQ
1.How can I place an order for MAX6835IXSD2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835IXSD2 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 MAX6835IXSD2 reliable?
The price and inventory of MAX6835IXSD2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835IXSD2 is usually 5 days.
3.What payment methods are accepted for MAX6835IXSD2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6835IXSD2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6835IXSD2?
MAX6835IXSD2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6835IXSD2 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 MAX6835IXSD2?
For technical support, including MAX6835IXSD2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835IXSD2 requirements.
6.How does Aetrix verify that MAX6835IXSD2 is sourced from the original manufacturer or authorized distributors?
All MAX6835IXSD2 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 MAX6835IXSD2 meets industry standards.
7.What is the process for return or replacement of MAX6835IXSD2?
All MAX6835IXSD2 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835IXSD2, 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 MAX6835IXSD2 part is unused and in its original packaging.
Return procedure for MAX6835IXSD2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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