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Analog Devices Inc./Maxim Integrated MAX6836FXSD3+T
- Part No.:
- MAX6836FXSD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6836FXSD3+T.pdf
- Description:
- IC MPU SUPERVISOR SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,403
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Product details
Overview
MAX6836FXSD3+T from Maxim Integrated is a push-pull active-high voltage supervisor IC designed for ultra-low-voltage microprocessor reset monitoring in 1.2V–1.8V digital systems. It features a factory-set 1.050V reset threshold (F suffix), 210ms reset timeout (D3 suffix), ±2.5% threshold accuracy over temperature, and operates down to VCC = 0.75V while asserting reset. It is used in portable battery-powered equipment to ensure reliable power-on reset and brownout recovery.
For engineers reviewing the MAX6836FXSD3+T datasheet, MAX6836FXSD3+T pinout, MAX6836FXSD3+T application, or MAX6836FXSD3+T equivalent, key selection criteria include active-high push-pull output compatibility with µP reset inputs, guaranteed reset validity at low VCC (≥0.75V), SC70-4 package footprint constraints, and manual reset debouncing capability.
Technical Context
The MAX6836FXSD3+T implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to monitor VCC against its fixed 1.050V threshold. Its internal debounced manual reset (MR) input includes a 20kΩ pullup and rejects glitches <100ns, enabling robust system-level reset initiation without external RC networks.
Reset assertion is triggered on VCC falling below 1.050V or MR pulled low; reset remains asserted for exactly 210ms after VCC rises above threshold or MR is released. The push-pull active-high RESET output drives high with VOH ≥0.8×VCC (at ISOURCE = 10µA, VCC ≥0.85V) and sinks low with VOL ≤0.2×VCC (at ISINK = 80µA, VCC ≥1.0V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.050V ±2.5% - precisely matches 1.05V supply rails and ensures deterministic reset activation during 1.2V system brownout |
| Reset Timeout Period | 210ms - provides sufficient hold time for slow-ramping power supplies and full µP initialization sequences |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year battery life in always-on portable instrumentation |
| VCC Operating Range | 0.75V to 3.6V - guarantees valid reset assertion even during deep discharge of Li-ion cells (down to ~0.75V) |
| Output Type | Push-pull active-high - eliminates need for external pullup resistor and simplifies interface to µP reset pins requiring HIGH-active assertion |
| Manual Reset Input | Debounced MR with 20kΩ internal pullup - supports direct switch-to-ground connection without external filtering components |
| Package | SC70-4 - 1.25mm × 1.65mm footprint ideal for space-constrained wearables and sensor nodes |
Pinout & Package
MAX6836FXSD3+T is housed in a 4-pin SC70 package (1.25mm × 1.65mm, 0.65mm pitch). Pin 1 = GND, Pin 2 = RESET (push-pull active-high), Pin 3 = MR (debounced manual reset input), Pin 4 = VCC (monitored supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for all internal comparators and output drivers; must be connected directly to system ground plane |
| 2 | RESET | Push-pull active-high reset output; drives HIGH during reset condition and LOW otherwise; interfaces directly to µP reset pin without pullup |
| 3 | MR | Active-low debounced manual reset input; internally pulled up to VCC; requires no external RC for noise immunity |
| 4 | VCC | Monitored supply input and power source; voltage range 0.75V–3.6V; determines reset threshold validity and output drive strength |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.050V threshold | Eliminates external resistor dividers and calibration steps in 1.05V rail monitoring applications |
| 210ms fixed timeout | Ensures µP reset pulse meets minimum duration requirements for ARM Cortex-M0/M3 and RISC-V SoCs |
| 7.5µA supply current | Reduces quiescent power in always-on subsystems-critical for energy-harvesting and coin-cell designs |
| MR input with 20kΩ pullup | Enables single-pole switch interface with no BOM additions; supports remote reset via GPIO-controlled NMOS |
| Guaranteed operation down to VCC = 0.75V | Maintains functional reset assertion through full discharge of 1-cell Li-ion (2.5V–0.75V) without false release |
Applications
| Battery-Powered IoT Sensor Node | Low-Voltage Microcontroller Power Monitoring |
|---|---|
Use Scenario: A wireless environmental sensor node powered by a single CR2032 coin cell (2.0V–1.8V nominal, down to 1.0V) must maintain reliable reset behavior across full discharge cycle. IC Role / Device Role / Timing Role: MAX6836FXSD3+T monitors VCC and asserts active-high RESET until VCC exceeds 1.050V + hysteresis, holding µC in reset during brownout. Use Value: Prevents erratic firmware execution during low-battery states; 210ms timeout ensures complete µC core initialization before code execution resumes. |
Use Scenario: An industrial controller uses a 1.2V core supply derived from a DC/DC converter with slow startup ramp (50ms rise time). IC Role / Device Role / Timing Role: MAX6836FXSD3+T acts as power-good sequencer, delaying µC release until 1.2V rail stabilizes above 1.050V and remains valid for 210ms. Use Value: Eliminates need for external timing capacitor; ensures µC does not exit reset prematurely due to supply ripple or transient dips. |
| Portable Medical Diagnostic Device | Wearable Health Monitor with Manual Reset |
Use Scenario: A handheld ECG analyzer uses a 1.5V LDO-regulated supply and requires fail-safe reset during battery swap or cold start. IC Role / Device Role / Timing Role: MAX6836FXSD3+T supervises the 1.5V rail and generates a clean, glitch-free active-high reset pulse synchronized to VCC recovery. Use Value: ±2.5% threshold accuracy prevents spurious resets during normal 1.5V rail tolerance (±5%), improving field reliability. |
Use Scenario: A wrist-worn pulse oximeter includes a test-mode button that forces system reset without cycling power. IC Role / Device Role / Timing Role: MAX6836FXSD3+T accepts debounced MR signal from tactile switch and extends reset assertion for full 210ms regardless of button press duration. Use Value: Internal MR debounce removes need for firmware-level debouncing or external RC filters-reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR29+T | Fixed 2.93V reset threshold; 200ms timeout; SC70-4; same push-pull active-high output | Designed for 3.3V I/O rail supervision-not suitable for sub-1.8V core supplies | Select only if supervising >2.5V rails; incompatible with 1.2V/1.5V logic domains |
| TPS3123E10DBVR | 1.0V threshold (±0.5%); 200ms timeout; SOT-23-5; active-high push-pull; 1.5µA IQ | Lower quiescent current but requires 5-pin layout; no integrated MR debounce | Prefer for ultra-low-power designs where board space allows SOT-23-5 and external MR filtering is acceptable |
Compared with MAX6836FXSD3+T, MAX6381XR29+T targets higher-voltage rails and lacks low-VCC validity below 1.0V, while TPS3123E10DBVR offers tighter threshold tolerance and lower IQ but demands additional layout area and external MR conditioning.
Availability
MAX6836FXSD3+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, low-voltage microcontroller power monitoring, and wearable health monitors requiring stable component supply across long production lifecycles.
Supply support for MAX6836FXSD3+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 management, sensing, and interface applications.
The MAX6832–MAX6840 family was developed specifically for ultra-low-voltage microprocessor reset supervision in space-constrained, battery-operated systems operating from 1.2V to 1.8V rails.
FAQ
What is the exact reset threshold voltage of MAX6836FXSD3+T?
The MAX6836FXSD3+T has a factory-set reset threshold of 1.050V with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is defined by the "F" suffix in the part number and is verified per the Electrical Characteristics table in the MAX6832–MAX6840 datasheet. The threshold remains stable across VCC variations from 0.75V to 3.6V.
Does MAX6836FXSD3+T support manual reset functionality?
Yes, MAX6836FXSD3+T includes a debounced manual reset (MR) input with an internal 20kΩ pullup resistor to VCC. Pulling MR low initiates a reset, which remains asserted for the full 210ms timeout period after MR returns high. No external RC network is required, making it ideal for compact designs with pushbutton reset interfaces.
What is the minimum VCC voltage at which MAX6836FXSD3+T guarantees valid reset output?
MAX6836FXSD3+T guarantees valid active-high reset output down to VCC = 0.75V. Below this voltage, reset assertion is not guaranteed. This specification enables reliable operation during deep discharge of single-cell lithium batteries and aligns with the device's design for ultra-low-voltage systems.
Can MAX6836FXSD3+T be used with a 1.2V supply rail?
Yes, MAX6836FXSD3+T is explicitly designed for 1.2V–1.8V supply monitoring. Its 1.050V reset threshold provides 140mV of margin above the 1.2V nominal rail, ensuring robust brownout detection while avoiding false triggers from normal rail tolerance (±5%). The device draws only 7.5µA at 1.2V, minimizing impact on battery life.
What package type and footprint does MAX6836FXSD3+T use?
MAX6836FXSD3+T is supplied in a 4-pin SC70 package (1.25mm × 1.65mm body, 0.65mm lead pitch). The pinout is: Pin 1 = GND, Pin 2 = RESET (active-high push-pull), Pin 3 = MR (debounced manual reset), Pin 4 = VCC. This compact footprint supports high-density layouts in wearables and miniature sensor modules.
MAX6836FXSD3+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 High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6836FXSD3+T FAQ
1.How can I place an order for MAX6836FXSD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6836FXSD3+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 MAX6836FXSD3+T reliable?
The price and inventory of MAX6836FXSD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6836FXSD3+T is usually 5 days.
3.What payment methods are accepted for MAX6836FXSD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6836FXSD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6836FXSD3+T?
MAX6836FXSD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6836FXSD3+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 MAX6836FXSD3+T?
For technical support, including MAX6836FXSD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6836FXSD3+T requirements.
6.How does Aetrix verify that MAX6836FXSD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6836FXSD3+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 MAX6836FXSD3+T meets industry standards.
7.What is the process for return or replacement of MAX6836FXSD3+T?
All MAX6836FXSD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6836FXSD3+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 MAX6836FXSD3+T part is unused and in its original packaging.
Return procedure for MAX6836FXSD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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