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Analog Devices Inc./Maxim Integrated MAX6835IXSD2-T
- Part No.:
- MAX6835IXSD2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835IXSD2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6835IXSD2-T from Maxim Integrated is a 4-pin SC70 ultra-low-voltage microprocessor reset circuit with push-pull active-low RESET output, 1.388V factory-set reset threshold, 30ms reset timeout period, and 7.5µA typical supply current. It monitors +1.2V to +1.8V supplies in portable and battery-powered systems, asserting reset during brownout or power-down events to ensure reliable µP initialization.
For engineers reviewing the MAX6835IXSD2-T datasheet, MAX6835IXSD2-T pinout, MAX6835IXSD2-T application, or MAX6835IXSD2-T equivalent, this device serves as a precision voltage detector for low-power embedded control, requiring no external components, supporting debounced manual reset, and offering ±2.5% threshold accuracy over temperature.
Technical Context
The MAX6835IXSD2-T implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) and a fixed 30ms timeout timer. Its reset assertion is triggered solely by VCC falling below 1.388V or MR being pulled low, with immunity to transients <100ns wide at VCC.
It features an internal 20kΩ pullup on the MR pin, operates down to VCC = 0.55V while maintaining valid active-low RESET output, and uses BiCMOS process technology with 681 transistors for low leakage and stable performance across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.388V ±2.5% - Ensures reliable reset assertion for 1.4V nominal core supplies |
| Reset Timeout Period | 30ms - Guarantees µP reset hold time sufficient for full power stabilization |
| Supply Current | 7.5µA (typ) at 1.2V - Enables multi-year battery life in always-on monitoring applications |
| VCC Operating Range | 0.55V to 3.6V - Supports operation through deep brownout and enables reset validity down to near-zero supply |
| Output Type | Push-pull active-low RESET - Drives CMOS inputs directly without external pullup resistor |
| MR Input | Debounced manual reset with 20kΩ internal pullup - Eliminates need for external RC debounce circuitry |
| Reset Propagation Delay | 60µs (VCC fall) - Fast response to supply collapse while rejecting sub-100ns noise |
Pinout & Package
MAX6835IXSD2-T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm 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 | Push-pull active-low output; sinks 15µA at VCC ≥ 0.55V, drives CMOS-compatible logic directly |
| 3 | MR | Active-low manual reset input with internal 20kΩ pullup to VCC; accepts CMOS-level signals or momentary switch to GND |
| 4 | VCC | Supply voltage input and monitored rail; powers device and sets comparator reference point |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.388V threshold | Eliminates external resistor network and calibration for 1.4V system rails |
| 30ms fixed timeout | Matches typical µP power-up stabilization time without requiring timing capacitor |
| 7.5µA supply current | Reduces quiescent power in always-on supervisory functions by >90% vs. legacy reset ICs |
| ±2.5% threshold accuracy over temperature | Ensures consistent reset behavior across industrial temperature range without derating |
| MR debounce integrated | Removes need for external RC filter or digital debouncer in handheld and IoT button interfaces |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage detector and reset supervisor ensuring µC restarts cleanly after battery voltage sag during RF burst. Use Value: 7.5µA quiescent current extends battery life beyond 2 years; 1.388V threshold aligns precisely with 1.4V LDO output under load. |
Use Scenario: Remote temperature/humidity node operating on primary lithium battery in unheated outdoor enclosure. IC Role / Device Role / Timing Role: Brownout protector that holds µC in reset during cold-start voltage droop below 1.4V. Use Value: Valid reset output down to VCC = 0.55V prevents spurious wakeups; ±2.5% threshold stability ensures reliability at -40°C. |
| POS Terminal Power Sequencing | Medical Infusion Pump Controller |
Use Scenario: Dual-rail system where 1.4V core logic powers ARM Cortex-M0+ and 3.3V I/O powers display and USB interface. IC Role / Device Role / Timing Role: Dedicated core-supply monitor triggering hard reset before logic corruption occurs. Use Value: Push-pull active-low RESET drives µC's nRST pin directly-no pullup required-reducing BOM count and layout area. |
Use Scenario: Safety-critical infusion controller requiring guaranteed reset during AC adapter dropout or battery switchover. IC Role / Device Role / Timing Role: Fail-safe reset generator with 30ms timeout ensuring motor driver and ADC are held in known state. Use Value: Immunity to 100ns VCC transients prevents false resets during relay switching noise; MR pin enables nurse-initiated system reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector and µP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 1.6V reset threshold, 140ms timeout, SOT23-3 package, no MR pin | Lacks manual reset and has higher threshold-unsuitable for 1.4V systems | Select only if system uses 1.6V supply and does not require MR functionality |
| TPS3123E13DBVR | 1.33V threshold, 200ms timeout, 3-pin SOT23, 3.5µA supply current | Lower quiescent current but longer timeout and no MR-limits use in fast-recovery systems | Prefer when ultra-low power dominates over reset timing precision and manual control |
Compared with MAX6835IXSD2-T, MAX809SEUR+T offers simpler 3-pin layout but sacrifices MR capability and threshold matching for 1.4V rails, while TPS3123E13DBVR reduces current draw by half yet doubles timeout duration and removes reset initiation flexibility-making MAX6835IXSD2-T optimal for compact, manually controllable, 1.4V brownout protection.
Availability
MAX6835IXSD2-T is available at Aetrix Electronics and suitable for portable electronics, industrial sensor nodes, and medical wearables requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX6835IXSD2-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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and connectivity applications, now part of Analog Devices.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained portable and battery-operated systems.
FAQ
What is the exact reset threshold voltage of the MAX6835IXSD2-T?
The MAX6835IXSD2-T has a factory-set reset threshold of 1.388V, with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is confirmed in the Electrical Characteristics table of the official datasheet and corresponds to the 'I' suffix in the Threshold Suffix Guide. The MAX6835IXSD2-T maintains this precise trip point without external calibration or trimming components.
Does the MAX6835IXSD2-T support manual reset functionality?
Yes, the MAX6835IXSD2-T includes a debounced manual reset input (MR) on Pin 3, featuring an internal 20kΩ pullup resistor to VCC. Pulling MR low forces an immediate reset, which remains asserted for the full 30ms timeout after MR is released. No external debounce circuitry is required, making it ideal for pushbutton interfaces in handheld devices.
What package type and dimensions does the MAX6835IXSD2-T use?
The MAX6835IXSD2-T is packaged in a 4-pin SC70-4 (also labeled SOT-323-4) case measuring 2.0mm × 2.1mm with 0.65mm lead pitch. This footprint is documented in the Pin Configurations section and matches standard SC70 land patterns-enabling direct drop-in placement in high-density PCB layouts for portable equipment.
Can the MAX6835IXSD2-T operate reliably below 1.0V supply voltage?
Yes, the MAX6835IXSD2-T guarantees valid reset operation down to VCC = 0.55V for its active-low push-pull RESET output. Below this level, the output enters high-impedance state-but for most µPs, operation ceases well before 0.55V, so system integrity is preserved. This capability is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables.
How does the 30ms reset timeout of the MAX6835IXSD2-T compare to other options in the MAX6832–MAX6840 family?
The 'D2' suffix in MAX6835IXSD2-T denotes a 30ms reset timeout period, one of five fixed options (70µs, 1.5ms, 30ms, 210ms, 1.68s). This duration is selected to match typical µP power-up stabilization times for 1.2V–1.8V core supplies-longer than basic voltage detection but shorter than full system boot sequences-ensuring robust yet responsive reset behavior without external timing components.
MAX6835IXSD2-T 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-T FAQ
1.How can I place an order for MAX6835IXSD2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835IXSD2-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 MAX6835IXSD2-T reliable?
The price and inventory of MAX6835IXSD2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835IXSD2-T is usually 5 days.
3.What payment methods are accepted for MAX6835IXSD2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6835IXSD2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6835IXSD2-T?
MAX6835IXSD2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6835IXSD2-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 MAX6835IXSD2-T?
For technical support, including MAX6835IXSD2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835IXSD2-T requirements.
6.How does Aetrix verify that MAX6835IXSD2-T is sourced from the original manufacturer or authorized distributors?
All MAX6835IXSD2-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 MAX6835IXSD2-T meets industry standards.
7.What is the process for return or replacement of MAX6835IXSD2-T?
All MAX6835IXSD2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835IXSD2-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 MAX6835IXSD2-T part is unused and in its original packaging.
Return procedure for MAX6835IXSD2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6835IXSD2-T Tags
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APX803L20-29SA-7
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