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Analog Devices Inc./Maxim Integrated MAX6835HXSD0
- Part No.:
- MAX6835HXSD0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835HXSD0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,508
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Product details
Overview
MAX6835HXSD0 from Maxim Integrated is a low-voltage microprocessor supervisory circuit in SC70-4 package, featuring push-pull active-low reset output, 1.313V factory-set reset threshold (±2.5% over temperature), 7.5µA typical supply current, and 1.5ms reset timeout period. It monitors +1.2V to +1.8V supplies in portable µP systems to prevent code-execution errors during power-up, brownout, or power-down.
For engineers reviewing the MAX6835HXSD0 datasheet, MAX6835HXSD0 pinout, MAX6835HXSD0 application, or MAX6835HXSD0 equivalent, key selection criteria include its 1.313V threshold accuracy, SC70-4 footprint compatibility, manual reset debounce capability, and guaranteed reset validity down to VCC = 0.55V.
Technical Context
The MAX6835HXSD0 implements a precision voltage comparator with hysteresis (0.75% of VTH) and internal 20kΩ MR pullup resistor, enabling noise-immune manual reset assertion without external components. Its reset logic asserts active-low RESET when VCC falls below 1.313V or MR is pulled low, holding RESET low for exactly 1.5ms after recovery.
It uses BiCMOS process (681 transistors) to achieve ultra-low ICC (7.5µA typ at 1.2V) while maintaining ±2.5% threshold accuracy from –40°C to +85°C and immunity to VCC transients ≤100ns at 20mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - ensures reliable reset assertion for 1.3V core supplies across industrial temperature range |
| Reset Timeout Period | 1.5ms - provides sufficient hold time for µP initialization without excessive system delay |
| Supply Current | 7.5µA (typ at 1.2V) - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 0.55V to 3.6V - guarantees reset validity during deep brownout down to 0.55V VCC |
| Reset Output Type | Push-pull active-low - drives CMOS inputs directly without pullup resistor; sinks 200µA at 0.2V VOL |
| MR Input | Debounced manual reset with 20kΩ internal pullup - eliminates need for external RC network or Schmitt trigger |
| Package | SC70-4 - 1.25mm × 0.85mm footprint saves PCB area vs. SOT-23; compatible with standard pick-and-place |
Pinout & Package
MAX6835HXSD0 is housed in a 4-pin SC70 package (1.25mm × 0.85mm, 0.65mm pitch), optimized for space-constrained portable designs. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC.
| 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; drives µP reset pin directly; sinks 200µA at VCC ≥ 1.5V with VOL ≤ 0.2V |
| 3 | MR | Active-low manual reset input with internal 20kΩ pullup to VCC; accepts CMOS-level signals; 2µs minimum pulse width |
| 4 | VCC | Monitored supply input (1.2V–1.8V nominal); powers device and serves as reference for reset threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold | Eliminates external resistor divider; reduces BOM count and layout complexity for 1.3V core rails |
| 1.5ms fixed timeout | Matches typical µP reset hold requirements without timing capacitor tolerance drift or temperature dependence |
| 7.5µA supply current | Enables integration into always-on subsystems (e.g., RTC backup, wake-on-event) without measurable battery drain |
| MR debounce with 20kΩ pullup | Supports direct connection to momentary switch; no external RC filter needed for ESD-robust manual reset |
| Reset valid to 0.55V VCC | Ensures deterministic reset state during deep undervoltage conditions where µP may still retain register contents |
Applications
| Battery-Powered IoT Sensor Node | Low-Power Wearable Controller |
|---|---|
Use Scenario: A coin-cell-powered environmental sensor samples data every 5 minutes and transmits via BLE only on threshold breach. IC Role / Device Role / Timing Role: MAX6835HXSD0 monitors the 1.3V LDO output powering the MCU and radio; asserts reset if battery sags below 1.25V during transmit burst. Use Value: Prevents corrupted BLE packet transmission by ensuring MCU resets cleanly before voltage collapse, avoiding firmware lockup. | Use Scenario: An optical heart-rate monitor uses an ARM Cortex-M0+ MCU running from a 1.35V buck converter with dynamic voltage scaling. IC Role / Device Role / Timing Role: MAX6835HXSD0 provides power-on reset and brownout protection during DVFS transitions; MR pin connects to tactile button for user-initiated firmware update reset. Use Value: Guarantees safe entry into bootloader mode without requiring external reset IC or GPIO-based software reset polling. |
| Industrial Handheld Terminal | Medical Point-of-Care Glucometer |
Use Scenario: A ruggedized barcode scanner operates from dual Li-ion cells with 1.2V–1.8V rail generated by a high-efficiency DC/DC converter. IC Role / Device Role / Timing Role: MAX6835HXSD0 supervises the 1.3V logic supply; its 1.5ms timeout aligns with FPGA configuration time after power stabilization. Use Value: Eliminates need for discrete RC reset circuit, reducing component count and improving long-term reliability under thermal cycling. | Use Scenario: A Class II medical glucometer uses a single AAA alkaline cell (0.9V–1.6V) with boost converter to generate stable 1.3V MCU supply. IC Role / Device Role / Timing Role: MAX6835HXSD0 detects end-of-life battery sag below 1.25V and forces controlled shutdown before EEPROM write corruption. Use Value: Meets IEC 62304 safety requirement for deterministic power-fail response, preventing invalid glucose result storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809H | Same 1.313V threshold and SC70-3 package, but lacks MR input and offers only 240ms timeout | Not suitable for systems requiring manual reset or fast 1.5ms timeout | Select MAX809H only if MR is unused and longer timeout is acceptable |
| TPS3808G13DBVR | 1.33V threshold (±0.5%), 1.5ms timeout, but 1.5µA supply current and SOT-23-5 package | Lower power but larger footprint; requires external pullup for open-drain RESET | Choose TPS3808G13DBVR for ultra-low-power designs where SC70-4 area constraint is relaxed |
Compared with MAX809H and TPS3808G13DBVR, MAX6835HXSD0 uniquely combines SC70-4 size, integrated MR debounce, and precise 1.313V/1.5ms specification-making it optimal for space-limited portable µP systems needing both power-monitoring and user-reset capability.
Availability
MAX6835HXSD0 is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, low-power wearable controllers, and industrial handheld terminals requiring stable component supply and long-term lifecycle support.
Supply support for MAX6835HXSD0 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 in industrial, medical, and consumer systems.
The MAX6832–MAX6840 product line delivers ultra-low-voltage supervisory circuits targeting portable and battery-operated µP systems requiring sub-1µA quiescent current and SC70 packaging.
FAQ
What is the exact reset threshold voltage of MAX6835HXSD0 and how accurate is it over temperature?
The MAX6835HXSD0 has a factory-set reset threshold of 1.313V with ±2.5% accuracy over the full –40°C to +85°C operating range. This value is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix H devices. The hysteresis is specified as 0.75% of VTH, ensuring clean release without chatter during slow VCC ramps.
Does MAX6835HXSD0 support manual reset, and what is required to use it?
Yes, MAX6835HXSD0 features a debounced manual reset input (MR) with an internal 20kΩ pullup resistor to VCC. To use it, connect a normally open momentary switch between MR and GND. No external components are needed-the device handles debounce internally. MR accepts CMOS logic levels and requires a minimum 2µs low pulse width.
What is the reset timeout period for MAX6835HXSD0, and how is it selected?
The MAX6835HXSD0 has a fixed 1.5ms reset timeout period, indicated by the "D1" suffix in its ordering code. This value is unchangeable and matches the D1 option in Table 2 of the datasheet. Unlike adjustable versions, MAX6835HXSD0 does not require external timing components-its timeout is fully internal and temperature-stable.
Can MAX6835HXSD0 operate with supply voltages below 1.2V, and what happens to RESET output at low VCC?
Yes, MAX6835HXSD0 operates down to VCC = 0.55V, and its push-pull active-low RESET output remains valid (sinks current) throughout this range. Below 0.55V, RESET becomes high-impedance. For applications requiring RESET validity down to 0V, a 100kΩ pulldown resistor on the RESET line is recommended per Figure 3 in the datasheet.
Is MAX6835HXSD0 pin-compatible with other supervisory ICs, and which ones?
MAX6835HXSD0 is pin-compatible with the MAX6836 and MAX6837 in the same SC70-4 package, differing only in reset polarity and MR/RESET-IN configuration. It is not pin-compatible with SC70-3 devices like MAX6832 or MAX809. The datasheet explicitly states pin compatibility only within the MAX6835/MAX6836/MAX6837 group for SC70-4 footprints.
MAX6835HXSD0 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
MAX6835HXSD0 FAQ
1.How can I place an order for MAX6835HXSD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835HXSD0 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 MAX6835HXSD0 reliable?
The price and inventory of MAX6835HXSD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835HXSD0 is usually 5 days.
3.What payment methods are accepted for MAX6835HXSD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6835HXSD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6835HXSD0?
MAX6835HXSD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6835HXSD0 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 MAX6835HXSD0?
For technical support, including MAX6835HXSD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835HXSD0 requirements.
6.How does Aetrix verify that MAX6835HXSD0 is sourced from the original manufacturer or authorized distributors?
All MAX6835HXSD0 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 MAX6835HXSD0 meets industry standards.
7.What is the process for return or replacement of MAX6835HXSD0?
All MAX6835HXSD0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835HXSD0, 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 MAX6835HXSD0 part is unused and in its original packaging.
Return procedure for MAX6835HXSD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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