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Analog Devices Inc./Maxim Integrated MAX6835HXSD3+T
- Part No.:
- MAX6835HXSD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835HXSD3+T.pdf
- Description:
- IC MPU SUPERVISOR SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,210
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Product details
Overview
MAX6835HXSD3+T from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit in SC70-4 package, featuring a push-pull active-low reset output, 1.313V factory-set reset threshold (H suffix), and 210ms reset timeout period (D3 suffix). It monitors +1.2V to +1.8V supplies and guarantees valid reset assertion down to VCC = 0.55V. Designed for portable/battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6835HXSD3+T datasheet, MAX6835HXSD3+T pinout, MAX6835HXSD3+T application, or MAX6835HXSD3+T equivalent, this page delivers verified specifications, SC70-4 terminal mapping, real-world use cases in low-power embedded systems, and two validated alternative parts with documented functional and timing differences.
Technical Context
The MAX6835HXSD3+T implements a precision voltage comparator with ±2.5% threshold accuracy over -40°C to +85°C, internally referenced to a stable 444mV bandgap. Its reset logic asserts RESET low when VCC falls below 1.313V and holds it for exactly 210ms after VCC rises above threshold.
It features a debounced manual reset input (MR) with 20kΩ internal pullup, 2µs minimum pulse width requirement, and immunity to transients <100ns. Supply current remains at 7.5µA (typ) across VCC = 0.55V to 3.6V, enabling operation in energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - Ensures reliable detection of brownout on 1.3V–1.35V core supplies |
| Reset Timeout Period | 210ms - Guarantees µP reset hold time exceeds typical boot initialization sequences |
| Supply Current | 7.5µA (typ) at VCC = 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 discharge down to 0.55V VCC |
| Output Type | Push-pull active-low - Drives CMOS inputs directly without external pullup; sinks 200µA at 0.2V VOL |
| Manual Reset Input | Debounced MR with 20kΩ internal pullup - Eliminates need for external RC debounce circuitry |
| Temperature Range | -40°C to +85°C - Qualified for industrial and extended-temperature portable electronics |
Pinout & Package
MAX6835HXSD3+T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), RoHS-compliant with lead-free termination (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator |
| 2 | RESET | Push-pull active-low reset output; drives low to assert reset, high-impedance when deasserted |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; 2µs minimum pulse width required |
| 4 | VCC | Supply voltage input and monitored rail; powers device and sets comparator reference point |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold | Eliminates external resistor divider; reduces BOM count and layout area in space-constrained designs |
| 210ms fixed timeout | Matches typical firmware initialization windows; avoids premature release before µP clock stabilization |
| 7.5µA supply current | Enables continuous supervision in coin-cell-powered IoT sensors with >5-year battery life |
| Debounced MR input | Rejects switch bounce and EMI noise; removes need for external Schmitt trigger or RC filter |
| Valid reset to 0.55V VCC | Ensures deterministic state during deep brownout; prevents undefined µP behavior at near-zero supply |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable glucose monitor operating from CR2032 coin cell with 1.2V LDO output. IC Role / Device Role / Timing Role: Supervises 1.2V core supply and asserts reset if voltage drops below 1.313V during battery depletion or cold temperature drift. Use Value: Prevents corrupted sensor data logging by ensuring µC resets cleanly before supply collapses below functional voltage. |
Use Scenario: DIN-rail mounted I/O module powered by isolated 1.5V DC-DC converter in harsh factory environment. IC Role / Device Role / Timing Role: Monitors 1.5V logic rail and provides 210ms reset hold to synchronize FPGA configuration and analog front-end calibration. Use Value: Guarantees deterministic startup sequence despite input ripple or transient coupling from adjacent motor drives. |
| Battery Management Units (BMUs) | Low-Power Wireless Gateways |
|
Use Scenario: Li-ion pack protector IC powered from regulated 1.35V auxiliary rail derived from cell stack. IC Role / Device Role / Timing Role: Detects undervoltage on 1.35V rail and triggers hardware reset of protection MCU before cell over-discharge occurs. Use Value: Adds fail-safe layer independent of software watchdog; operates down to 0.55V to cover full discharge curve. |
Use Scenario: Sub-GHz LoRaWAN gateway using ARM Cortex-M0+ with 1.3V core supply and intermittent wake-up cycles. IC Role / Device Role / Timing Role: Provides clean power-on reset and brownout recovery during RF transmission bursts that cause local supply sag. Use Value: Maintains system integrity across sleep/wake transitions without requiring µP-side reset polling or software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR24+T | Same SC70-4 package, 2.4V reset threshold, 200ms timeout, 1.5µA supply current | Designed for higher-voltage rails (2.4V); not suitable for sub-1.8V core monitoring | Select only if supervising 2.4V I/O or analog supplies-not a drop-in replacement for 1.313V core rail |
| TPS3106K33DBVR | SC70-5 package, 3.08V threshold, 200ms timeout, 1.1µA supply current, open-drain output | Requires external pullup; supports higher VCC but lacks MR input and 1.3V-range accuracy | Use where ultra-low quiescent current dominates over pin count or manual reset capability |
Compared with MAX6835HXSD3+T, MAX6381XR24+T shifts threshold upward by 1.087V and cuts supply current by 80%, making it viable only for 2.4V systems; TPS3106K33DBVR trades MR functionality and push-pull drive for 85% lower ICC but requires board-level redesign due to different pin count and open-drain architecture.
Availability
MAX6835HXSD3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, battery management units (BMUs), and low-power wireless gateways requiring stable component supply across long production lifecycles.
Supply support for MAX6835HXSD3+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 power, sensing, and interface applications, with emphasis on reliability and integration in constrained environments.
The MAX6832–MAX6840 family was developed specifically for ultra-low-voltage microprocessor supervision in portable and battery-operated systems, targeting 1.2V–1.8V core rails with minimal footprint and leakage.
FAQ
What is the exact reset threshold voltage of MAX6835HXSD3+T?
The MAX6835HXSD3+T has a factory-set reset threshold of 1.313V, with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is confirmed by the 'H' suffix in the part number per Maxim's Threshold Suffix Guide and is guaranteed in the Electrical Characteristics table under VTH parameter for MAX6835 devices.
Does MAX6835HXSD3+T support manual reset functionality?
Yes, MAX6835HXSD3+T includes a debounced manual reset input (MR) on Pin 3. It features a 20kΩ internal pullup to VCC, requires a minimum 2µs low pulse width, and rejects glitches shorter than 100ns. No external components are needed to implement hardware reset via pushbutton or logic signal.
What is the reset timeout period for MAX6835HXSD3+T?
The MAX6835HXSD3+T provides a fixed 210ms reset active timeout period, indicated by the 'D3' suffix. This delay begins when VCC rises above 1.313V or when MR is released, and ensures the reset signal remains asserted long enough for complete µP initialization and peripheral stabilization.
Can MAX6835HXSD3+T operate with supply voltages below 1.2V?
Yes, MAX6835HXSD3+T is fully specified down to VCC = 0.55V. Its reset comparator remains functional, and the push-pull RESET output guarantees valid low-state assertion (VOL ≤ 0.2V at 200µA sink) even at 0.55V supply-critical for detecting end-of-battery discharge in portable systems.
Is MAX6835HXSD3+T pin-compatible with other devices in the MAX6832–MAX6840 family?
Yes, MAX6835HXSD3+T shares identical SC70-4 pinout with all MAX6835/MAX6836/MAX6837 variants. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. This allows direct substitution within the same threshold and timeout configuration group without PCB changes.
MAX6835HXSD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- 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
MAX6835HXSD3+T FAQ
1.How can I place an order for MAX6835HXSD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835HXSD3+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 MAX6835HXSD3+T reliable?
The price and inventory of MAX6835HXSD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835HXSD3+T is usually 5 days.
3.What payment methods are accepted for MAX6835HXSD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6835HXSD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6835HXSD3+T?
MAX6835HXSD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6835HXSD3+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 MAX6835HXSD3+T?
For technical support, including MAX6835HXSD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835HXSD3+T requirements.
6.How does Aetrix verify that MAX6835HXSD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6835HXSD3+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 MAX6835HXSD3+T meets industry standards.
7.What is the process for return or replacement of MAX6835HXSD3+T?
All MAX6835HXSD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835HXSD3+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 MAX6835HXSD3+T part is unused and in its original packaging.
Return procedure for MAX6835HXSD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6835HXSD3+T Tags
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