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Analog Devices Inc./Maxim Integrated MAX6388XS29D5-T
- Part No.:
- MAX6388XS29D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS29D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,465
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Product details
Overview
MAX6388XS29D5-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), 280ms minimum VCC reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, targeting power-critical embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS29D5-T datasheet, MAX6388XS29D5-T pinout, MAX6388XS29D5-T application, or MAX6388XS29D5-T equivalent, key selection criteria include its 2.93V reset threshold accuracy, 280ms timeout timing, 4-pin SC70 package footprint, and dual-monitoring capability via RESET IN - all validated for automotive-grade operation (-40°C to +125°C).
Technical Context
The MAX6388XS29D5-T integrates a precision voltage comparator for VCC monitoring against a fixed 2.93V threshold and a separate high-impedance RESET IN input referenced to an internal 1.27V bandgap. Reset assertion occurs when either VCC falls below 2.93V or RESET IN drops below 1.27V, with independent timing control.
Its active-high push-pull RESET output guarantees valid logic state down to VCC = 1.0V and supports sink/source currents up to 3.2mA/800µA respectively. The device features negative-going VCC transient immunity and includes no manual reset input - distinguishing it from MAX6384–MAX6386 and MAX6390 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V nominal, ±2.5% over -40°C to +125°C - ensures stable reset activation across automotive temperature range |
| Reset Timeout Period | 280ms minimum - provides sufficient hold time for μP initialization after power recovery |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives directly into CMOS/TTL inputs |
| RESET IN Threshold | 1.27V ±2.5% - allows user-defined secondary reset point via resistor divider on external supply rail |
| Temperature Range | -40°C to +125°C - qualified for under-hood and industrial control applications |
Pinout & Package
MAX6388XS29D5-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. This compact footprint supports high-density PCB layouts while maintaining thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source - powers internal circuitry and triggers reset when falling below 2.93V |
| 2 | RESET | Active-high push-pull output - asserts high during fault condition and holds for full 280ms timeout after recovery |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | Auxiliary voltage monitor input - compares external divided voltage to internal 1.27V reference; enables dual-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (2.93V) and external rail via RESET IN (1.27V reference) - eliminates need for second supervisor IC in dual-supply systems |
| Low quiescent current | 3μA at 1.8V - reduces standby power in always-on IoT nodes and battery-backed controllers |
| Guaranteed reset validity | RESET output remains functional down to VCC = 1.0V - ensures deterministic behavior during deep undervoltage events |
| Negative transient immunity | Rejects short-duration VCC glitches per JEDEC JESD82-1F - prevents spurious resets in electrically noisy environments |
| Automotive qualification | AEC-Q100 qualified (Grade 1) - validated for use in automotive infotainment, ADAS, and body electronics |
Applications
| Industrial PLC Controller | Automotive Infotainment Power Sequencing |
|---|---|
|
Use Scenario: Monitors 3.3V I/O supply and 1.2V core rail in programmable logic controller CPU module during cold crank and load dump conditions. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high reset to ARM Cortex-M7 MCU upon either rail collapse, with 280ms timeout ensuring firmware reload completion. Use Value: Prevents corrupted register states and flash writes during unstable power transitions, meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Supervises 5V USB-C PD input and 1.8V SoC I/O supply in head unit, detecting brownout during engine start. IC Role / Device Role / Timing Role: Resets application processor via active-high push-pull output; RESET IN monitors 1.8V rail while VCC tracks 5V input. Use Value: Enables seamless restart without external pullups or debounce components, reducing BOM count by one passive per rail. |
| Portable Medical Sensor Hub | Dual-Voltage FPGA Configuration |
|
Use Scenario: Ensures reliable startup of BLE-connected glucose meter using coin-cell battery with declining voltage profile. IC Role / Device Role / Timing Role: Triggers reset when main 2.8V supply dips below 2.93V threshold or auxiliary sensor rail fails, holding reset for 280ms. Use Value: Guarantees clean boot sequence even as battery voltage decays from 3.0V to 2.2V, eliminating intermittent lockups. |
Use Scenario: Validates both 3.3V configuration voltage and 1.2V core voltage before releasing FPGA PROG_B signal. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 1.2V rail against 1.27V reference while VCC senses 3.3V rail - dual-trigger reset initiation. Use Value: Prevents partial configuration and bitstream corruption by enforcing strict sequencing compliance per Xilinx DS182. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS29D5-T | Same 2.93V threshold and 280ms timeout, but open-drain active-low RESET output requiring external pullup | Suitable where system-level reset bus is shared and pulled up externally; incompatible with direct CMOS input drive | Select MAX6387XS29D5-T only if existing design uses open-drain architecture and pullup resistor is already present |
| MAX6385XS29D5-T | Identical 2.93V/280ms specs but adds debounced manual reset input (MR); no RESET IN functionality | Preferred in test/debug environments requiring operator-initiated reset; lacks dual-supply monitoring capability | Choose MAX6385XS29D5-T when field serviceability outweighs need for auxiliary rail supervision |
Compared with MAX6388XS29D5-T, MAX6387XS29D5-T requires board-level pullup redesign and offers no MR function, while MAX6385XS29D5-T sacrifices RESET IN for MR - making MAX6388XS29D5-T the sole option combining dual-rail supervision, active-high drive, and no manual reset overhead.
Availability
MAX6388XS29D5-T is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC controllers, and portable medical devices requiring stable component supply with guaranteed AEC-Q100 qualification and long-term lifecycle support.
Supply support for MAX6388XS29D5-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 demanding industrial, automotive, and communications applications, emphasizing low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-powered and automotive systems where accurate reset timing, ultra-low quiescent current, and extended temperature operation are critical.
FAQ
What is the exact reset threshold voltage of MAX6388XS29D5-T and how stable is it over temperature?
The MAX6388XS29D5-T has a factory-set VCC reset threshold of 2.93V nominal, with ±2.5% tolerance over the full -40°C to +125°C operating range. Its temperature coefficient is 60ppm/°C, meaning threshold drift is limited to ±31mV across the entire temperature span - verified per AEC-Q100 stress testing and guaranteed in production.
Does MAX6388XS29D5-T support monitoring of two independent power rails simultaneously?
Yes, MAX6388XS29D5-T supports dual-rail supervision: VCC is monitored against its fixed 2.93V threshold, while the RESET IN pin compares an external voltage to an internal 1.27V reference. Reset asserts if either rail falls below its respective threshold - enabling robust power sequencing in systems with core and I/O supplies.
What is the function of the RESET IN pin on MAX6388XS29D5-T and how is it configured?
The RESET IN pin on MAX6388XS29D5-T is a high-impedance input to a comparator referenced to 1.27V. To set a custom reset point, connect it to the center tap of a resistor divider between the auxiliary supply and ground. For example, a 100kΩ top resistor and 47kΩ bottom resistor sets a ~3.18V threshold using the formula VINTH = 1.27V × (R1/R2 + 1).
Is MAX6388XS29D5-T compatible with standard SC70 footprints used for other supervisors like MAX809?
MAX6388XS29D5-T uses a 4-pin SC70 package (outline 21-0098) with 0.65mm pitch, which differs from the 3-pin SC70 footprint of MAX809. While pin-compatible with MAX6384–MAX6386 and MAX6387–MAX6389 in the same family, it is not drop-in compatible with MAX809 due to different pin count and layout - PCB redesign is required for migration.
What is the minimum supply voltage at which MAX6388XS29D5-T guarantees correct RESET output logic state?
MAX6388XS29D5-T guarantees valid RESET output logic levels down to VCC = 1.0V. Below this, the internal regulator cannot maintain comparator accuracy or output driver strength. This ensures deterministic reset behavior during deep brownout events common in automotive stop-start systems and battery-depleted portable devices.
MAX6388XS29D5-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:
- 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:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS29D5-T FAQ
1.How can I place an order for MAX6388XS29D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS29D5-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 MAX6388XS29D5-T reliable?
The price and inventory of MAX6388XS29D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS29D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS29D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS29D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS29D5-T?
MAX6388XS29D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS29D5-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 MAX6388XS29D5-T?
For technical support, including MAX6388XS29D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS29D5-T requirements.
6.How does Aetrix verify that MAX6388XS29D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS29D5-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 MAX6388XS29D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS29D5-T?
All MAX6388XS29D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS29D5-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 MAX6388XS29D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS29D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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