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Analog Devices Inc./Maxim Integrated MAX6388XS29D3+T
- Part No.:
- MAX6388XS29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS29D3+T.pdf
- Description:
- IC MPU/RESET CIRC 2.93V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
MAX6388XS29D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V VCC reset threshold (±2.5% over –40°C to +125°C), 140ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered controllers and intelligent instrumentation requiring reliable power-up/brownout detection.
For engineers reviewing the MAX6388XS29D3+T datasheet, MAX6388XS29D3+T pinout, MAX6388XS29D3+T application, or MAX6388XS29D3+T equivalent, key selection considerations include its 4-pin SC70 package, dual-monitoring capability via RESET IN, ±2.5% threshold accuracy across automotive temperature range, and compatibility with systems needing 2.93V reset assertion on main supply and adjustable secondary threshold.
Technical Context
The MAX6388XS29D3+T integrates two independent voltage comparators: one monitors VCC against a precision 2.93V internal reference, the other compares external RESET IN voltage to a fixed +1.27V reference. Reset asserts when either input falls below its threshold, and remains asserted for 140ms after recovery.
Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly without external pullup; the RESET IN pin accepts resistor-divider networks to set user-defined thresholds, enabling flexible dual-rail supervision in I/O-core or analog-digital partitioned systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (nominal), ±2.5% tolerance over –40°C to +125°C - ensures consistent brownout detection across automotive temperature range |
| Reset Timeout Period | 140ms (minimum) - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable equipment |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP reset input |
| RESET IN Threshold | +1.27V (±2.5% over temperature) - allows precise secondary voltage monitoring via external resistor divider |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and industrial embedded applications |
| VCC Range | +1.0V to +5.5V - supports supervision of core, I/O, and auxiliary rails in modern low-voltage systems |
Pinout & Package
MAX6388XS29D3+T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, suitable for space-constrained PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and sets reset threshold reference point |
| 2 | RESET | Active-high push-pull reset output; drives high during fault and remains high for 140ms after recovery |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for stable comparator operation |
| 4 | RESET IN | Auxiliary voltage monitor input; compared to +1.27V internal reference to enable dual-supply supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC (2.93V) and external rail via RESET IN (+1.27V reference), enabling I/O-core or analog-digital power sequencing |
| Factory-trimmed reset threshold | 2.93V with ±2.5% accuracy over –40°C to +125°C - eliminates need for external calibration in automotive and industrial designs |
| Low quiescent current | 3μA at +1.8V - extends battery life in portable medical devices and wireless sensors |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe embedded control systems |
| Negative-going VCC transient immunity | Rejects short-duration glitches (e.g., <1µs at 100mV overdrive) without false triggering - improves robustness in noisy power environments |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: Supervision of dual-rail power supplies (3.3V I/O and 1.8V core) in programmable logic controllers with watchdog requirements. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting active-high reset to ARM Cortex-M microcontroller during undervoltage on either rail. Use Value: Prevents erratic firmware execution by guaranteeing synchronized reset across both voltage domains with 140ms hold time. |
Use Scenario: Battery-powered glucose meter with separate analog front-end (2.5V) and digital processor (1.8V) supplies. IC Role / Device Role / Timing Role: Monitors main battery rail (2.93V threshold) and auxiliary analog rail (via RESET IN) to trigger shutdown before sensor data corruption. Use Value: Enables accurate low-battery warning and graceful shutdown using single IC, reducing BOM count and PCB area. |
| Automotive Body Control Modules | Smart Sensor Nodes |
|
Use Scenario: Power-on reset and brownout protection for LIN bus transceivers and microcontrollers in door module ECUs. IC Role / Device Role / Timing Role: Provides AEC-Q100–qualified supervision of 5V supply (2.93V threshold) and 3.3V domain (via RESET IN) with guaranteed operation to +125°C. Use Value: Meets automotive reliability standards while eliminating discrete resistor-divider networks for secondary rail monitoring. |
Use Scenario: Ultra-low-power environmental sensor node powered by energy harvesting (1.5–3.0V range) with intermittent operation. IC Role / Device Role / Timing Role: Resets ESP32-based host MCU when harvested voltage drops below 2.93V, with 140ms timeout ensuring stable wake-up sequence. Use Value: Achieves sub-μA system standby current by leveraging 3μA IC quiescent draw, extending operational lifetime between harvest cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT29D3+T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70; includes NC pins and different thermal resistance (θJA = 477°C/W) | Better thermal performance in high-density layouts; requires different footprint and land pattern (90-0080) | Select when board layout allows larger package and higher power dissipation margin is needed. |
| TLV803SDBZR | Single-supply reset IC (2.93V threshold, 140ms timeout) in SOT-23-3; no RESET IN pin; ±2% threshold accuracy; 0.5μA typical ICC | Lacks dual-monitoring capability; lower supply current but no auxiliary voltage supervision | Choose for cost-sensitive, single-rail applications where RESET IN functionality is unnecessary. |
Compared with MAX6388XS29D3+T, the LT29D3 variant offers identical reset behavior in a thermally enhanced μDFN package, while TLV803SDBZR provides lower power and smaller size but sacrifices dual-voltage monitoring - making MAX6388XS29D3+T optimal for systems requiring coordinated supervision of multiple rails.
Availability
MAX6388XS29D3+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body electronics, and smart sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS29D3+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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy voltage supervision for microprocessor-based systems where reliability across wide temperature ranges and minimal board space are critical design constraints.
FAQ
What is the exact reset threshold voltage of MAX6388XS29D3+T and how stable is it over temperature?
The MAX6388XS29D3+T has a factory-set nominal VCC reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This stability is achieved through laser-trimmed internal references and BiCMOS process optimization, ensuring consistent brownout detection without external calibration in automotive and industrial environments.
Does MAX6388XS29D3+T support monitoring of a second voltage rail, and if so, how is it implemented?
Yes, MAX6388XS29D3+T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to a precise +1.27V internal reference. Users implement this by connecting a resistor divider between the secondary rail and ground, calculating R1 and R2 using VINTH = 1.27V × (R1/R2 + 1). The MAX6388XS29D3+T asserts reset if either VCC falls below 2.93V or RESET IN drops below 1.27V.
What is the function and timing behavior of the RESET output on MAX6388XS29D3+T?
The RESET output of MAX6388XS29D3+T is an active-high push-pull driver. It goes high when VCC falls below 2.93V or RESET IN drops below +1.27V, and remains high for a guaranteed minimum of 140ms after both monitored voltages recover above their respective thresholds. This ensures μP reset hold time meets typical initialization requirements without external timing components.
Can MAX6388XS29D3+T operate reliably at very low supply voltages, and what is its minimum functional VCC?
Yes, MAX6388XS29D3+T guarantees correct reset output logic state down to VCC = 1.0V, as confirmed in its Absolute Maximum Ratings and Electrical Characteristics tables. This enables fail-safe operation during deep brownout events in battery-powered systems, where other supervisors may lose output predictability below 1.5V.
What package type and footprint does MAX6388XS29D3+T use, and are land patterns available?
MAX6388XS29D3+T uses a 4-pin SC70 package (outline number 21-0098, package code X4+1) with dimensions 2.0mm × 2.1mm × 0.95mm. Its land pattern (footprint) is documented as number 90-0187 on Maxim's packaging website, and the RoHS-compliant "+T" suffix confirms lead-free construction compatible with standard reflow profiles.
MAX6388XS29D3+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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS29D3+T FAQ
1.How can I place an order for MAX6388XS29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS29D3+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 MAX6388XS29D3+T reliable?
The price and inventory of MAX6388XS29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6388XS29D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS29D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS29D3+T?
MAX6388XS29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS29D3+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 MAX6388XS29D3+T?
For technical support, including MAX6388XS29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS29D3+T requirements.
6.How does Aetrix verify that MAX6388XS29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS29D3+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 MAX6388XS29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6388XS29D3+T?
All MAX6388XS29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS29D3+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 MAX6388XS29D3+T part is unused and in its original packaging.
Return procedure for MAX6388XS29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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