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Analog Devices Inc./Maxim Integrated MAX6839XSD0-T
- Part No.:
- MAX6839XSD0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6839XSD0-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
MAX6839XSD0-T from Maxim Integrated is a push-pull, active-high voltage supervisor IC designed for ultra-low-voltage microprocessor reset monitoring in portable and battery-powered systems. It features a factory-set 1.050V reset threshold (suffix F), 1.5ms reset timeout (suffix D1), RESET-IN adjustable threshold input (444mV typical), ±3.0% threshold accuracy over -40°C to +85°C, and 7.5µA typical supply current at 1.2V - enabling reliable power-on reset assertion in low-power embedded controllers.
For engineers reviewing the MAX6839XSD0-T datasheet, MAX6839XSD0-T pinout, MAX6839XSD0-T application, or MAX6839XSD0-T equivalent, this device serves as a precision, low-quiescent-current supervisory solution for systems requiring externally adjustable reset thresholds and guaranteed reset validity down to VCC = 0.75V with active-high output logic.
Technical Context
The MAX6839XSD0-T uses an internal 444mV reference comparator to monitor voltage applied to its RESET-IN pin, asserting RESET when that input falls below threshold - decoupling monitored supply voltage from VCC. Its push-pull active-high output drives high during reset and releases low afterward, eliminating external pullup requirements.
VCC must be ≥1.1V to guarantee RESET-IN threshold accuracy; the device operates across VCC = 0.75V to 3.6V and supports manual reset override only via RESET-IN control (no MR pin). Reset timeout is fixed at 1.5ms (D1 suffix) and immune to transients ≤100ns on RESET-IN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.050V (F-suffix), ±3.0% over temperature - sets trip point for external resistive divider on RESET-IN |
| Reset Timeout Period | 1.5ms (D1 suffix) - ensures µP remains held in reset long enough for stable power rail recovery |
| RESET-IN Reference Voltage | 444mV typical - high-impedance input reference enabling low-power divider networks |
| Supply Current | 7.5µA typical at 1.2V - minimizes battery drain in always-on supervision circuits |
| VCC Operating Range | 0.75V to 3.6V - supports operation during deep brownout while maintaining RESET output drive |
| RESET Output Type | Push-pull active-high - eliminates need for external pullup resistor and simplifies interface to µP reset inputs |
| Reset Validity Limit | VCC ≥ 0.75V - guarantees valid HIGH/LOW logic levels on RESET output across full operating range |
Pinout & Package
MAX6839XSD0-T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for space-constrained portable designs. Pin functions are validated per Maxim's official pin description for MAX6838/MAX6839/MAX6840.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET-IN | High-impedance input referenced to 444mV comparator - connects to external resistive divider to set custom reset threshold |
| 2 | VCC | Power supply input (0.75V–3.6V) and bias source - must be ≥1.1V for guaranteed RESET-IN accuracy |
| 3 | GND | Analog and digital ground reference - requires low-impedance connection to system ground plane |
| 4 | RESET | Push-pull active-high output - drives HIGH during reset assertion; sinks current when deasserted (LOW) |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset threshold via RESET-IN | Enables precise monitoring of supply voltages as low as 0.44V using external resistors - no factory trimming required |
| 1.5ms fixed reset timeout | Guarantees sufficient hold time for µP initialization without software configuration or external timing components |
| 7.5µA supply current | Reduces standby power in battery-operated devices - extends operational life without compromising supervision reliability |
| ±3.0% reset threshold accuracy | Maintains consistent trip points across industrial temperature range (-40°C to +85°C) for robust system-level validation |
| Push-pull active-high RESET output | Directly interfaces with standard µP reset inputs without pullup resistors - simplifies BOM and PCB layout |
Applications
| Battery-Powered Wearables | Low-Voltage Microcontroller Systems |
|---|---|
Use Scenario: A compact fitness tracker uses a 1.2V core supply powered by a coin-cell battery, requiring reliable reset during shallow discharge cycles. IC Role / Device Role / Timing Role: MAX6839XSD0-T monitors the 1.2V rail via RESET-IN divider and asserts active-high RESET for 1.5ms upon voltage sag below 1.050V. Use Value: Ensures deterministic µC boot sequence even at sub-1.1V battery voltages, leveraging guaranteed reset validity down to VCC = 0.75V. |
Use Scenario: An industrial sensor node employs a 1.35V I/O supply and 1.1V core supply, needing independent reset control for each domain. IC Role / Device Role / Timing Role: MAX6839XSD0-T supervises the 1.35V rail using a 200kΩ/70.3kΩ divider on RESET-IN to trigger reset at exactly 1.35V. Use Value: Achieves precise, adjustable trip point without calibration - eliminating tolerance stack-up from fixed-threshold alternatives. |
| Portable Medical Devices | Energy-Harvesting Edge Nodes |
Use Scenario: A handheld glucose meter operates from a single alkaline cell (0.9V–1.6V), demanding fail-safe reset during voltage decay. IC Role / Device Role / Timing Role: MAX6839XSD0-T provides active-high reset signal synchronized to measured supply drop, with 1.5ms timeout ensuring ADC and display initialization. Use Value: Low 7.5µA quiescent current preserves battery capacity between measurements - critical for multi-week shelf life. |
Use Scenario: An environmental sensor powered by a solar harvester experiences intermittent 0.8V–1.5V supply, requiring reset assertion only when energy falls below safe operating level. IC Role / Device Role / Timing Role: MAX6839XSD0-T's RESET-IN input enables dynamic threshold setting tied to harvester output, avoiding false resets during transient dips. Use Value: Adjustable threshold prevents premature shutdown during brief energy gaps - increasing effective uptime in low-light conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6836XSD0-T | Same SC70-4 package and D1 timeout, but fixed 1.050V threshold applied to VCC (not RESET-IN); no adjustable input | Requires direct VCC monitoring - unsuitable when VCC is not the monitored rail or when sub-1.1V accuracy is needed | Select MAX6836XSD0-T only if reset threshold must track VCC directly and external divider is unnecessary |
| MAX6316HUT46+T | Active-high push-pull output, 4.63V fixed threshold, 140ms timeout, SOT-23-5 package - no RESET-IN capability | Designed for higher-voltage systems (>3V); incompatible with ultra-low-voltage monitoring below 1.2V | Choose MAX6316HUT46+T only for legacy 5V/3.3V systems where adjustable threshold and sub-1V operation are irrelevant |
Compared with MAX6836XSD0-T and MAX6316HUT46+T, the MAX6839XSD0-T uniquely supports externally adjustable reset thresholds via RESET-IN while maintaining ultra-low supply current and guaranteed operation down to VCC = 0.75V - making it the only option among the three for precision low-voltage supervision with design flexibility.
Availability
MAX6839XSD0-T is available at Aetrix Electronics and suitable for battery-powered wearables, portable medical devices, low-voltage microcontroller systems, and energy-harvesting edge nodes requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX6839XSD0-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 - acquired by Analog Devices in 2021.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor reset supervision in portable and battery-critical systems, emphasizing minimal quiescent current and flexible threshold configuration.
FAQ
What is the exact reset threshold voltage of MAX6839XSD0-T?
The MAX6839XSD0-T has a factory-coded reset threshold suffix 'F', corresponding to a nominal 1.050V threshold applied to the RESET-IN pin. This value is referenced to the internal 444mV comparator, and the actual trip point is set by an external resistive divider connected to RESET-IN. Accuracy is ±3.0% over the full -40°C to +85°C temperature range.
Does MAX6839XSD0-T monitor VCC directly or use an external input?
The MAX6839XSD0-T does not monitor VCC directly for reset assertion. Instead, it uses the RESET-IN pin as its primary sense input - requiring an external resistive divider to scale the target supply voltage down to the internal 444mV reference. VCC serves only as the device's power supply and bias source, with minimum requirement of 0.75V for operation and 1.1V for guaranteed RESET-IN accuracy.
What is the reset timeout period for MAX6839XSD0-T and how is it selected?
The MAX6839XSD0-T has a fixed 1.5ms reset timeout period, indicated by the 'D1' suffix in the part number. This duration is internally programmed and non-adjustable. It defines the minimum time RESET remains asserted after the RESET-IN voltage rises above threshold, ensuring sufficient hold time for microprocessor initialization before release.
Can MAX6839XSD0-T operate with VCC below 1.1V?
Yes, MAX6839XSD0-T operates with VCC as low as 0.75V and guarantees active-high RESET output functionality down to that level. However, RESET-IN threshold accuracy is only specified for VCC ≥ 1.1V. Below 1.1V, the device continues to assert reset when RESET-IN falls below 444mV, but the absolute trip voltage tolerance may exceed ±3.0%.
Is MAX6839XSD0-T pin-compatible with other devices in the MAX6832–MAX6840 family?
MAX6839XSD0-T shares the same 4-pin SC70-4 package and pinout (RESET-IN, VCC, GND, RESET) with MAX6838XSD0-T and MAX6840XSD0-T. It is not pin-compatible with 3-pin variants (e.g., MAX6832–MAX6837) or with parts having MR or open-drain outputs - pin function mapping is unique to the RESET-IN subgroup.
MAX6839XSD0-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:
- Adjustable/Selectable
- 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
MAX6839XSD0-T FAQ
1.How can I place an order for MAX6839XSD0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6839XSD0-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 MAX6839XSD0-T reliable?
The price and inventory of MAX6839XSD0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6839XSD0-T is usually 5 days.
3.What payment methods are accepted for MAX6839XSD0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6839XSD0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6839XSD0-T?
MAX6839XSD0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6839XSD0-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 MAX6839XSD0-T?
For technical support, including MAX6839XSD0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6839XSD0-T requirements.
6.How does Aetrix verify that MAX6839XSD0-T is sourced from the original manufacturer or authorized distributors?
All MAX6839XSD0-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 MAX6839XSD0-T meets industry standards.
7.What is the process for return or replacement of MAX6839XSD0-T?
All MAX6839XSD0-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6839XSD0-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 MAX6839XSD0-T part is unused and in its original packaging.
Return procedure for MAX6839XSD0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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