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Analog Devices Inc./Maxim Integrated MAX6835VXSD0
- Part No.:
- MAX6835VXSD0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835VXSD0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,169
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Product details
Overview
The MAX6835VXSD0 from Maxim Integrated is a micropower voltage supervisor IC designed to monitor +1.575V supply rails in low-voltage microprocessor and digital systems. It features a push-pull active-low RESET output, 30ms reset timeout period (D2 suffix), ±2.5% threshold accuracy over temperature, and operates down to VCC = 0.55V while consuming only 7.5µA typical supply current. It is used for reliable power-on reset generation in portable battery-powered equipment.
For engineers reviewing the MAX6835VXSD0 datasheet, MAX6835VXSD0 pinout, MAX6835VXSD0 application, or MAX6835VXSD0 equivalent, key selection criteria include its factory-set 1.575V reset threshold, SC70-4 package footprint, debounced manual reset input (MR), immunity to short VCC transients, and compatibility with 1.2V–1.8V core logic domains.
Technical Context
This device implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to detect supply droop below its fixed 1.575V threshold. The internal timing circuit generates a guaranteed 30ms reset assertion window after VCC recovery or MR release, independent of supply ramp rate.
It integrates a 20kΩ internal pullup on the MR pin and guarantees valid RESET output down to VCC = 0.55V-critical for brownout detection in ultra-low-voltage systems. Its BiCMOS process enables stable operation across –40°C to +85°C with no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V ±2.5% - precisely matches 1.6V nominal core supplies with tight tolerance over full temperature range |
| Reset Timeout Period | 30ms - ensures sufficient hold time for µP initialization before release, per JEDEC JESD8-12 requirement |
| Supply Current | 7.5µA typ at 1.2V - enables multi-year battery life in always-on monitoring applications |
| Operating Voltage Range | 0.55V to 3.6V - supports valid reset assertion during deep brownout and post-power-down recovery |
| MR Input Pulse Width | 2µs minimum - allows clean reset initiation from fast GPIO or debounce-free mechanical switch |
| Reset Output Type | Push-pull active-low - drives CMOS inputs directly without external pullup, reducing BOM count |
| Package | SC70-4 - 1.3mm × 2.1mm footprint, compatible with high-density portable PCB layouts |
Pinout & Package
MAX6835VXSD0 is housed in a 4-pin SC70 package (1.3mm × 2.1mm, 0.65mm pitch), optimized for space-constrained portable designs. Pin 1 is GND, Pin 2 is RESET (push-pull active-low), Pin 3 is MR (debounced manual reset input), and Pin 4 is VCC (monitored supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for all internal comparators and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Push-pull active-low reset output; sinks 15µA at VCC ≥ 0.55V, drives µP reset pin directly without external components |
| 3 | MR | Debounced active-low manual reset input; internal 20kΩ pullup to VCC eliminates need for external resistor; accepts CMOS-level signals |
| 4 | VCC | Monitored supply input and power source; voltage applied here sets both operating point and reset detection threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.575V threshold | Eliminates external resistor divider and calibration, reducing design cycle time and component count |
| 30ms fixed timeout | Guarantees µP reset hold time meets ARM Cortex-M and RISC-V boot requirements without timing margin uncertainty |
| 7.5µA supply current | Enables continuous supervision in energy-harvesting and coin-cell-powered IoT sensors |
| MR debounce integrated | Removes need for RC filter or firmware polling, simplifying hardware and software design |
| SC70-4 package | Provides same board area as 0402 passives, enabling placement near µP power pins for shortest trace routing |
Applications
| Battery-Powered Wearables | Low-Power Microcontroller Systems |
|---|---|
Use Scenario: Continuous voltage monitoring of a 1.6V Li-ion cell–fed SoC in a smartwatch during charge/discharge cycles. IC Role / Device Role / Timing Role: Supervisor IC asserting active-low RESET to halt CPU execution when cell voltage drops below 1.575V, holding reset for 30ms after recovery. Use Value: Prevents corrupted flash writes and state machine lockup during brownout, extending device field reliability beyond 50,000 power cycles. |
Use Scenario: Power-on reset generation for an ARM Cortex-M0+ MCU running from a 1.5V DC/DC converter in an industrial sensor node. IC Role / Device Role / Timing Role: Voltage detector ensuring RESET remains asserted until VCC stabilizes above 1.575V and holds for 30ms, satisfying ARM's POR timing spec. Use Value: Guarantees deterministic boot sequence without firmware workarounds or external timing capacitors. |
| Portable Medical Devices | Energy-Harvesting Edge Nodes |
Use Scenario: Supervising a 1.55V regulated rail powering an ECG analog front-end and BLE radio in a patch-style monitor. IC Role / Device Role / Timing Role: Low-current supervisor providing fail-safe reset during battery depletion or cold-temperature voltage sag. Use Value: Maintains functional safety compliance (IEC 62304) by preventing undefined behavior when supply falls below 1.575V ±2.5%. |
Use Scenario: Monitoring output of a 1.6V boost converter powered by piezoelectric energy harvester in predictive maintenance sensor. IC Role / Device Role / Timing Role: Ultra-low-quiescent supervisor asserting RESET during intermittent power gaps, with 7.5µA draw preserving harvested energy. Use Value: Enables >98% energy efficiency in duty-cycled wake-up architecture by eliminating standby leakage overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR24D3-T | 2.4V reset threshold, 30ms timeout, SC70-4, same 7.5µA ICC | Designed for 2.5V I/O domains-not suitable for 1.6V core monitoring | Select only if supervising higher-voltage rails; not drop-in for MAX6835VXSD0's 1.575V target |
| TPS3808G15DBVR | 1.5V threshold (±0.5%), 20ms timeout, SOT-23-5, 1.1µA ICC | Lower quiescent current but requires external pullup for open-drain RESET; different pinout and package | Prefer for ultra-low-power apps where 20ms timeout suffices and board layout allows SOT-23-5 rework |
Compared with MAX6835VXSD0, MAX6381XR24D3-T targets higher supply voltages and cannot replace it in 1.6V systems, while TPS3808G15DBVR offers lower ICC but demands layout changes and lacks integrated MR debounce-making MAX6835VXSD0 optimal for compact, cost-sensitive 1.5–1.6V µP reset applications.
Availability
MAX6835VXSD0 is available at Aetrix Electronics and suitable for portable medical devices, battery-powered wearables, and low-power microcontroller systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6835VXSD0 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and consumer applications.
The MAX6832–MAX6840 product line was engineered specifically for ultra-low-voltage power monitoring in portable and battery-operated systems, emphasizing minimal footprint, sub-10µA quiescent current, and factory-trimmed thresholds to eliminate calibration.
FAQ
What is the exact reset threshold voltage of the MAX6835VXSD0?
The MAX6835VXSD0 has a factory-set reset threshold of 1.575V with ±2.5% accuracy over the full –40°C to +85°C temperature range. This value is laser-trimmed during production and does not require external adjustment. The threshold is specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for the "V" suffix variant, and applies directly to the MAX6835VXSD0 without modification.
Does the MAX6835VXSD0 support manual reset functionality?
Yes, the MAX6835VXSD0 includes a debounced manual reset input (MR) on Pin 3. It features an internal 20kΩ pullup to VCC, so the pin can be left unconnected if unused. Pulling MR low forces an immediate reset, which remains active for the full 30ms timeout period after MR returns high-no external debounce circuitry is needed.
What is the guaranteed minimum VCC level at which the MAX6835VXSD0 maintains valid RESET output?
The MAX6835VXSD0 guarantees valid active-low RESET output down to VCC = 0.55V. Below this voltage, the output transitions to high-impedance. This specification ensures robust brownout detection in systems where supply may sag to sub-0.6V during transient load conditions, and is explicitly confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
Can the MAX6835VXSD0 be used with a 1.2V supply rail?
No-the MAX6835VXSD0's 1.575V reset threshold is incompatible with reliable supervision of a 1.2V rail. For 1.2V systems, select the MAX6835IXSD0 (1.388V threshold) or MAX6835HXSD0 (1.313V threshold). Using MAX6835VXSD0 on 1.2V would result in permanent reset assertion, as VCC never exceeds the 1.575V threshold.
What package type and dimensions does the MAX6835VXSD0 use?
The MAX6835VXSD0 uses a 4-pin SC70 package (also labeled SC70-4), with body dimensions of 1.3mm × 2.1mm and lead pitch of 0.65mm. This is confirmed in the Ordering Information table and Pin Configurations diagram. The top mark "AEX" identifies the MAX6835VXSD0 variant on the physical device.
MAX6835VXSD0 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6835VXSD0 FAQ
1.How can I place an order for MAX6835VXSD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835VXSD0 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 MAX6835VXSD0 reliable?
The price and inventory of MAX6835VXSD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835VXSD0 is usually 5 days.
3.What payment methods are accepted for MAX6835VXSD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6835VXSD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6835VXSD0?
MAX6835VXSD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6835VXSD0 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 MAX6835VXSD0?
For technical support, including MAX6835VXSD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835VXSD0 requirements.
6.How does Aetrix verify that MAX6835VXSD0 is sourced from the original manufacturer or authorized distributors?
All MAX6835VXSD0 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 MAX6835VXSD0 meets industry standards.
7.What is the process for return or replacement of MAX6835VXSD0?
All MAX6835VXSD0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835VXSD0, 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 MAX6835VXSD0 part is unused and in its original packaging.
Return procedure for MAX6835VXSD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6835VXSD0 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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