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Analog Devices Inc./Maxim Integrated MAX6835HXSD0+T
- Part No.:
- MAX6835HXSD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835HXSD0+T.pdf
- Description:
- IC MPU SUPERVISOR SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,631
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Product details
Overview
MAX6835HXSD0+T from Maxim Integrated is a 4-pin SC70 ultra-low-voltage microprocessor reset circuit with push-pull active-low RESET output, 1.313V factory-set reset threshold (H suffix), and 70µs timeout period (D0 suffix). It monitors +1.2V to +1.8V supplies in portable and battery-powered systems, asserting reset during power-up, brownout, or manual reset events while consuming only 7.5µA typical supply current.
For engineers reviewing the MAX6835HXSD0+T datasheet, MAX6835HXSD0+T pinout, MAX6835HXSD0+T application, or MAX6835HXSD0+T equivalent, this device serves as a precision, low-power supervisory solution for critical µP power monitoring where guaranteed reset validity down to VCC = 0.55V and immunity to short VCC transients are required.
Technical Context
The MAX6835HXSD0+T implements a precision bandgap-based voltage comparator with ±2.5% reset threshold accuracy over -40°C to +85°C, paired with a fixed 70µs timeout delay generator optimized for voltage detector mode. Its internal 20kΩ MR pullup enables direct connection of a momentary switch without external debounce circuitry.
This variant belongs to the MAX6835 subgroup: it features debounced manual reset input (MR), push-pull active-low RESET output, and no RESET-IN pin-distinguishing it from MAX6838–MAX6840 variants. Reset assertion is triggered solely by VCC falling below 1.313V, not by external threshold adjustment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - precisely matches 1.3V core rails; ensures reliable reset before logic corruption |
| Timeout Period | 70µs - minimal delay for fast power-up sequencing in low-latency embedded systems |
| 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 - guarantees reset assertion even during deep brownout down to 0.55V VCC |
| Reset Output Type | Push-pull active-low - drives RESET directly without external pullup; compatible with standard µP reset inputs |
| MR Input | Debounced, internal 20kΩ pullup - eliminates need for external RC filter; supports direct switch-to-ground interface |
| Package | SC70-4 - 2.0mm × 2.1mm footprint; enables high-density PCB layouts in space-constrained portable designs |
Pinout & Package
MAX6835HXSD0+T is housed in a 4-pin SC70 package (2.0mm × 2.1mm, 0.65mm pitch), with pins arranged in a single row. The package is RoHS-compliant (indicated by "+" suffix) and rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection |
| 2 | RESET | Push-pull active-low output; sinks current when asserted; drives µP reset pin directly without pullup resistor |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; assert by grounding; debounced internally |
| 4 | VCC | Supply voltage input and monitored rail; powers device and sets reset detection threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold | Eliminates external resistor networks; ensures consistent reset point across production batches |
| 70µs reset timeout | Optimized for voltage detector use case-fastest available option for immediate system stabilization |
| 7.5µA supply current | Reduces quiescent power in always-on supervision; extends battery runtime in IoT sensor nodes |
| ±2.5% threshold accuracy over temperature | Maintains tight reset window across industrial temperature range without calibration |
| Immunity to VCC transients ≤100ns | Prevents false resets from ESD or switching noise; avoids unnecessary µP reboots in noisy environments |
Applications
| Wearable Health Monitors | Industrial Sensor Nodes |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing powered by coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervisory reset circuit ensuring µC boots cleanly after cold start or brownout induced by RF burst current draw. Use Value: 7.5µA quiescent current minimizes standby drain; 1.313V threshold aligns with 1.3V LDO output; 70µs timeout prevents boot race conditions. |
Use Scenario: Wireless vibration sensor mounted on rotating machinery, operating unattended for months. IC Role / Device Role / Timing Role: Power supply monitor that asserts reset if main 1.3V rail dips during motor startup or EMI event. Use Value: ±2.5% threshold accuracy ensures reliable trip across -40°C to +85°C ambient; MR pin allows field service reset via test point. |
| Portable Medical Diagnostics | Low-Power Edge AI Modules |
|
Use Scenario: Handheld blood glucose meter with LCD display and USB charging, requiring deterministic startup. IC Role / Device Role / Timing Role: Voltage supervisor guaranteeing µP enters known state before initializing ADC and display drivers. Use Value: Push-pull RESET eliminates external pullup, reducing BOM count; SC70-4 footprint saves board space in compact enclosure. |
Use Scenario: TinyML inference module running on sub-1.5V core voltage, powered from energy-harvesting source. IC Role / Device Role / Timing Role: Brownout detector preventing corrupted neural network execution when harvested voltage sags. Use Value: Valid reset assertion down to VCC = 0.55V ensures safety-critical shutdown before logic failure; MR enables firmware-triggered safe reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809HTR | Same 1.313V threshold and SC70-3 package, but lacks MR input and offers only 140ms/1.12s timeout options-not 70µs. | Not suitable for fast-sequencing systems requiring sub-millisecond reset; no manual reset capability. | Select MAX809HTR only if MR is unused and longer timeout is acceptable. |
| TPS3123HDBVR | 1.313V threshold, 70µs timeout, and MR input-but uses SOT-23-5 package and requires external pullup for open-drain RESET. | Requires additional 10kΩ pullup resistor and larger PCB area; incompatible pinout prevents drop-in replacement. | Choose TPS3123HDBVR only if design already accommodates SOT-23-5 layout and open-drain interface. |
Compared with MAX809HTR and TPS3123HDBVR, the MAX6835HXSD0+T uniquely combines 70µs timeout, debounced MR, push-pull RESET, and SC70-4 packaging-enabling compact, low-power, and fully self-contained reset supervision without external components.
Availability
MAX6835HXSD0+T is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, and portable medical diagnostics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6835HXSD0+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) is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and connectivity applications.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor supervision in battery-powered and space-constrained systems, emphasizing precision thresholding, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6835HXSD0+T?
The MAX6835HXSD0+T has a factory-set reset threshold of 1.313V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is defined by the "H" suffix in the part number and is guaranteed by design-not typical or nominal-ensuring consistent behavior across environmental conditions and production lots. The threshold is referenced to the VCC supply being monitored.
Does the MAX6835HXSD0+T require an external pullup resistor on its RESET pin?
No, the MAX6835HXSD0+T features a push-pull active-low RESET output, meaning it actively drives both HIGH and LOW states without needing an external pullup resistor. This simplifies the BOM and PCB layout compared to open-drain alternatives like the MAX6834/MAX6837. The RESET pin can be connected directly to a µP's reset input.
Can the MAX6835HXSD0+T monitor supply voltages below 1.2V?
No-the MAX6835HXSD0+T is specified for monitoring supplies from +1.2V to +1.8V, and its internal circuitry requires VCC ≥ 0.55V to assert reset. For sub-1.2V monitoring, Maxim offers the MAX6838–MAX6840 series with RESET-IN input, which supports thresholds as low as 0.44V using external resistive dividers. The MAX6835HXSD0+T does not include RESET-IN functionality.
What is the purpose of the MR pin on the MAX6835HXSD0+T?
The MR (Manual Reset) pin on the MAX6835HXSD0+T is an active-low input with internal 20kΩ pullup to VCC. Pulling MR low forces an immediate reset, independent of VCC level. The device includes internal debouncing, so no external RC filter is needed. This enables field service reset, test-mode entry, or fail-safe recovery-making the MAX6835HXSD0+T suitable for systems requiring operator-initiated restarts.
Is the MAX6835HXSD0+T pin-compatible with older Maxim reset ICs like the MAX809?
No-while the MAX6835HXSD0+T shares functional similarity with the MAX809 series, it is not pin-compatible. The MAX6835HXSD0+T uses a 4-pin SC70-4 package (GND, RESET, MR, VCC), whereas the MAX809HTR uses a 3-pin SC70-3 package (GND, RESET, VCC) with no MR pin. Layout redesign and schematic updates are required for substitution.
MAX6835HXSD0+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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6835HXSD0+T FAQ
1.How can I place an order for MAX6835HXSD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835HXSD0+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 MAX6835HXSD0+T reliable?
The price and inventory of MAX6835HXSD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835HXSD0+T is usually 5 days.
3.What payment methods are accepted for MAX6835HXSD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6835HXSD0+T transactions.
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4.How is shipping managed for MAX6835HXSD0+T?
MAX6835HXSD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6835HXSD0+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 MAX6835HXSD0+T?
For technical support, including MAX6835HXSD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835HXSD0+T requirements.
6.How does Aetrix verify that MAX6835HXSD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6835HXSD0+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 MAX6835HXSD0+T meets industry standards.
7.What is the process for return or replacement of MAX6835HXSD0+T?
All MAX6835HXSD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835HXSD0+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 MAX6835HXSD0+T part is unused and in its original packaging.
Return procedure for MAX6835HXSD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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