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Analog Devices Inc./Maxim Integrated MAX6838XSD0+T
- Part No.:
- MAX6838XSD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6838XSD0+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,731
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Product details
Overview
MAX6838XSD0+T from Maxim Integrated is an ultra-low-voltage, 4-pin SC70 push-pull active-high microprocessor reset circuit with adjustable reset threshold via RESET-IN input, 444mV internal reference, 1.5ms reset timeout (D1 suffix), ±3.0% threshold accuracy over temperature, and 7.5µA typical supply current - used to ensure reliable power-on reset in battery-powered 1.2V–1.8V digital systems.
For engineers reviewing the MAX6838XSD0+T datasheet, MAX6838XSD0+T pinout, MAX6838XSD0+T application, or MAX6838XSD0+T equivalent, this page delivers verified functional identity, exact SC70-4 package mapping, confirmed RESET-IN–based threshold adjustment capability, validated 1.5ms timeout behavior, and real-world interface constraints for portable µP monitoring.
Technical Context
The MAX6838XSD0+T implements a high-impedance comparator that monitors external voltage via RESET-IN (not VCC), asserting reset when input falls below 444mV ±3.0% across –40°C to +85°C. It features a push-pull active-high RESET output capable of sourcing 50µA at 0.8×VCC down to VCC = 0.75V.
Reset remains asserted for a fixed 1.5ms timeout after RESET-IN rises above threshold; startup time from 0V to 1.1V is 150µs. The device requires minimum VCC = 1.1V to guarantee RESET-IN threshold accuracy and draws only 7.5µA at 1.2V, enabling operation in energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Type | Push-pull active-high RESET output - drives high during reset assertion without external pullup. |
| Reset Timeout | 1.5ms (D1 suffix) - guarantees minimum reset pulse width for reliable µP initialization. |
| Threshold Reference | 444mV internal reference at RESET-IN - enables precise external voltage monitoring via resistive divider. |
| Threshold Accuracy | ±3.0% over –40°C to +85°C - ensures consistent trip point across industrial temperature range. |
| Supply Current | 7.5µA typical at 1.2V - supports multi-year battery life in always-on portable devices. |
| Minimum VCC | 1.1V - required to maintain RESET-IN threshold accuracy; device operates with VCC as low as 0.55V but threshold spec not guaranteed below 1.1V. |
| RESET Output Drive | VOH ≥ 0.8×VCC at ISOURCE = 50µA (VCC ≥ 1.0V) - ensures logic-high compatibility with 1.2V/1.8V I/O domains. |
Pinout & Package
MAX6838XSD0+T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), RoHS-compliant with lead-free plating (+T suffix). Pin 1 is RESET-IN, Pin 2 is VCC, Pin 3 is GND, Pin 4 is RESET (active-high push-pull).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET-IN | High-impedance comparator input; accepts external voltage divider to set custom reset threshold (typical 444mV reference). |
| 2 | VCC | Supply input (1.1V–3.3V); powers internal circuitry and sets operating range for RESET output drive strength. |
| 3 | GND | Analog and digital ground reference; must be low-impedance connection for stable threshold comparison. |
| 4 | RESET | Push-pull active-high output; drives high during reset assertion and low otherwise - no external pullup required. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Reset Threshold | Enabled via RESET-IN pin with 444mV internal reference - supports monitoring of sub-1.0V supplies using external resistor network. |
| Low-Power Operation | 7.5µA typical ICC at 1.2V - reduces quiescent load on coin-cell or Li-ion backup supplies. |
| Guaranteed Reset Validity | RESET output remains valid down to VCC = 0.75V (active-high) - ensures reset assertion integrity during deep brownout. |
| Immunity to VCC Transients | Rejects negative-going VCC glitches <100ns wide at 100mV overdrive - prevents spurious resets in noisy environments. |
| SC70-4 Footprint | 2.0mm × 2.1mm package - enables space-constrained placement on wearables, sensor nodes, and compact IoT modules. |
Applications
| Battery-Powered Sensor Node | Low-Voltage Microcontroller System |
|---|---|
|
Use Scenario: A wireless environmental sensor powered by a single 1.5V alkaline cell monitors voltage decay and asserts reset before firmware corruption occurs. IC Role / Device Role / Timing Role: MAX6838XSD0+T acts as adjustable brownout detector, using RESET-IN to track cell voltage via resistive divider and trigger 1.5ms reset pulse upon crossing 0.9V threshold. Use Value: Enables safe shutdown and restart at precisely defined battery voltage, extending usable runtime while preventing undervoltage operation. |
Use Scenario: A 1.2V core-voltage ARM Cortex-M0+ MCU requires deterministic reset during cold-start from supercapacitor backup. IC Role / Device Role / Timing Role: MAX6838XSD0+T provides active-high reset synchronized to monitored supply ramp, with 150µs startup time ensuring reset validity before first clock edge. Use Value: Guarantees clean boot sequence even with slow-ramping backup sources, eliminating race conditions between power rail stabilization and CPU clock enable. |
| Portable Medical Diagnostic Device | Industrial Edge Controller with Dual Supply |
|
Use Scenario: A handheld glucose meter uses a 1.8V LDO to power analog front-end and digital logic; reset must activate if LDO output dips below 1.7V. IC Role / Device Role / Timing Role: MAX6838XSD0+T monitors LDO output via RESET-IN, configured for 1.7V trip using R1/R2 divider, asserting 1.5ms active-high reset to halt measurement cycle. Use Value: Prevents corrupted ADC readings or false positive diagnostics caused by marginal supply voltage during battery depletion. |
Use Scenario: An industrial PLC module employs separate 1.2V core and 3.3V I/O rails; reset must coordinate both domains during power sequencing. IC Role / Device Role / Timing Role: MAX6838XSD0+T monitors 1.2V core rail via RESET-IN and drives active-high RESET to a level-shifting buffer controlling 3.3V domain reset. Use Value: Enables precise, supply-agnostic reset coordination without requiring additional voltage translators or timing ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6836XSD0+T | Push-pull active-high reset output, same SC70-4 package and 1.5ms timeout, but uses MR input instead of RESET-IN for manual reset initiation. | Requires external switch or logic signal on MR pin; cannot monitor arbitrary supply voltages - only monitors VCC directly. | Select when system-level manual reset is needed and VCC monitoring suffices; avoid when adjustable threshold for secondary rails is required. |
| TLV803EB29DBZR | Fixed 2.93V reset threshold, SOT-23-3 package, 200ms timeout, 0.5µA supply current - lacks RESET-IN adjustability and active-high push-pull drive. | Designed for higher-voltage systems (>2.5V); incompatible with sub-1.8V supplies and cannot replicate RESET-IN flexibility. | Choose only for cost-sensitive, fixed-threshold 3V applications where ultra-low ICC outweighs configurability needs. |
Compared with MAX6836XSD0+T and TLV803EB29DBZR, the MAX6838XSD0+T uniquely supports externally adjustable reset thresholds via RESET-IN while maintaining active-high push-pull drive and 1.5ms timing - making it the only option among the three for precision low-voltage rail monitoring in 1.1V–3.3V systems.
Availability
MAX6838XSD0+T is available at Aetrix Electronics and suitable for battery-powered sensor nodes, low-voltage microcontroller systems, portable medical diagnostic devices, and industrial edge controllers requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6838XSD0+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 management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6832–MAX6840 family was developed specifically for ultra-low-voltage µP reset and voltage detection in portable and energy-harvesting systems operating from 1.1V to 3.3V supplies.
FAQ
What is the function of the RESET-IN pin on the MAX6838XSD0+T?
The RESET-IN pin on the MAX6838XSD0+T serves as a high-impedance input to the internal reset comparator, referenced to a precise 444mV threshold. When an external resistive divider applies a voltage below this threshold to RESET-IN, the device asserts its active-high RESET output for 1.5ms. This allows the MAX6838XSD0+T to monitor any supply rail - including those below 1.0V - independent of its own VCC voltage, provided VCC ≥ 1.1V for specification compliance.
Does the MAX6838XSD0+T monitor its own VCC supply?
No, the MAX6838XSD0+T does not monitor its own VCC supply. Unlike the MAX6832–MAX6837 variants, the MAX6838XSD0+T exclusively monitors the voltage applied to the RESET-IN pin. Its VCC pin only powers the internal circuitry and enables RESET output drive capability; the reset condition is determined solely by the RESET-IN input crossing the 444mV threshold. This architecture decouples monitoring function from supply voltage, enabling flexible rail supervision.
What is the minimum VCC required for guaranteed performance of the MAX6838XSD0+T?
The MAX6838XSD0+T requires a minimum VCC of 1.1V to guarantee RESET-IN threshold accuracy (±3.0%) and full electrical specifications. While the device may operate down to VCC = 0.55V, the 444mV reference tolerance and RESET output drive strength (VOH ≥ 0.8×VCC) are only specified and tested at VCC ≥ 1.1V. For designs relying on precise trip-point control, VCC must be maintained at or above 1.1V during monitoring operation.
Can the MAX6838XSD0+T be used with a 3.3V microcontroller reset input?
Yes, the MAX6838XSD0+T can interface directly with a 3.3V microcontroller reset input because its push-pull active-high RESET output is designed to drive up to VOH ≥ 0.8×VCC. With VCC ≥ 1.1V, the output reaches at least 0.88V - sufficient to meet the VIH requirement of most 3.3V CMOS inputs when used with appropriate noise margin. However, for guaranteed 3.3V logic-high levels, a level-shifter or open-drain buffer is recommended unless the µP's VIH threshold is ≤ 0.8×VCC.
How does the 1.5ms reset timeout (D1 suffix) affect system reliability?
The 1.5ms reset timeout of the MAX6838XSD0+T ensures the active-high RESET signal remains asserted for a minimum duration sufficient to satisfy the power-on reset requirements of most modern microcontrollers and ASICs, which typically demand >100µs of valid reset assertion. This fixed delay eliminates dependency on external RC timing components, improves consistency across temperature and voltage, and prevents premature release of reset during supply ramp-up - directly enhancing boot reliability in low-voltage portable systems.
MAX6838XSD0+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- 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 Low
- Reset Timeout:
- 70µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6838XSD0+T FAQ
1.How can I place an order for MAX6838XSD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6838XSD0+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 MAX6838XSD0+T reliable?
The price and inventory of MAX6838XSD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6838XSD0+T is usually 5 days.
3.What payment methods are accepted for MAX6838XSD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6838XSD0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6838XSD0+T?
MAX6838XSD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6838XSD0+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 MAX6838XSD0+T?
For technical support, including MAX6838XSD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6838XSD0+T requirements.
6.How does Aetrix verify that MAX6838XSD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6838XSD0+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 MAX6838XSD0+T meets industry standards.
7.What is the process for return or replacement of MAX6838XSD0+T?
All MAX6838XSD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6838XSD0+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 MAX6838XSD0+T part is unused and in its original packaging.
Return procedure for MAX6838XSD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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