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Analog Devices Inc./Maxim Integrated MAX6388XS29D6-T
- Part No.:
- MAX6388XS29D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS29D6-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
MAX6388XS29D6-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), 560ms 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, enabling use in battery-powered instrumentation and embedded controllers requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6388XS29D6-T datasheet, MAX6388XS29D6-T pinout, MAX6388XS29D6-T application, or MAX6388XS29D6-T equivalent, key selection considerations include its 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy across automotive temperature range, and support for external voltage-divider–based secondary supply monitoring via RESET IN.
Technical Context
The MAX6388XS29D6-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.93V threshold, asserting an active-high RESET signal when VCC falls below this level. An internal timer enforces a minimum 560ms reset timeout after VCC recovers above threshold.
It features a high-impedance RESET IN input referenced to an internal 1.27V comparator, allowing user-defined secondary voltage monitoring via external resistor divider. Reset asserts if either VCC < 2.93V or RESET IN < 1.27V, with typical RESET IN to RESET delay of 4.5µs and leakage current ≤ ±1nA.
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 assertion across automotive temperature range without external calibration |
| Reset Timeout Period | 560ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered portable instruments |
| 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% - allows precise secondary supply monitoring using standard resistor dividers |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset signaling even during deep brownout conditions |
| Reset Propagation Delay | 35µs (VCC falling) - fast response to supply transients prevents spurious processor execution |
Pinout & Package
MAX6388XS29D6-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 in portable and industrial control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node - must be decoupled with 0.1μF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - drives high during reset assertion; sinks/source current per spec (VOL ≤ 0.3V at 80μA) |
| 3 | GND | Analog/digital ground reference - requires low-impedance connection to system ground plane |
| 4 | RESET IN | Auxiliary voltage monitor input - high-impedance (≤ ±1nA leakage) node for external resistor-divider network to set secondary reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous VCC and RESET IN monitoring enables independent reset assertion on main or auxiliary rail failure |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset state during severe brownout - no undefined logic levels at μP reset input |
| Negative-going VCC transient immunity | Rejects short-duration supply glitches (e.g., ≤ 100ns at 100mV overdrive) without false reset generation |
| Factory-trimmed threshold accuracy | ±2.5% tolerance over full temperature range eliminates need for post-manufacture calibration or margining |
| Low quiescent current | 3μA at 1.8V enables integration into always-on subsystems without compromising battery life |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meter with dual-rail power (3.3V MCU core, 1.8V sensor interface) requiring fail-safe startup and brownout recovery. IC Role / Device Role / Timing Role: Supervises both VCC and sensor rail via RESET IN; asserts active-high RESET to hold MCU in reset until both supplies stabilize. Use Value: Prevents corrupted ADC readings or EEPROM writes during unstable power-up by enforcing 560ms minimum reset hold time and dual-threshold validation. | Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V DC input and 3.3V logic supply, operating in harsh factory environments. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail and detects undervoltage on isolated 24V input via RESET IN divider; provides noise-immune reset signaling. Use Value: Eliminates spurious resets from EMI-induced transients using built-in negative-going glitch rejection and 0.1μF local VCC decoupling. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: 12V-powered vehicle door module with 5V/3.3V LDOs, requiring AEC-Q100–compliant supervision and cold-crank resilience. IC Role / Device Role / Timing Role: Tracks 3.3V microcontroller supply and monitors 5V CAN transceiver rail via RESET IN; asserts reset during cranking-induced dips below 2.93V. Use Value: Maintains functional safety integrity with ±2.5% threshold accuracy over –40°C to +125°C and guaranteed operation down to VCC = 1V. | Use Scenario: Revenue-grade electricity meter with separate 3.3V metrology ASIC and 1.8V real-time clock supply, needing tamper-resistant power sequencing. IC Role / Device Role / Timing Role: Supervises metrology rail and independently monitors RTC backup supply via RESET IN; triggers secure shutdown on either rail fault. Use Value: Enables compliance with IEC 62053-21 by ensuring deterministic reset behavior during AC mains dropout and battery switchover events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT29D6-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 vs. 322.6°C/W) | Better thermal performance in high-density layouts; requires larger PCB footprint and different land pattern (90-0080 vs. 90-0187) | Select LT version for higher power dissipation margin or board-level reflow compatibility with μDFN-6 processes |
| TPS3808G33DBVR | TI part with 3.3V threshold (not 2.93V), 200ms default timeout (adjustable), and open-drain output - lacks RESET IN input and active-high push-pull drive | Suitable for single-rail 3.3V systems only; requires external pullup and cannot monitor auxiliary voltage | Choose only if redesign accommodates open-drain interface and secondary monitoring is unnecessary |
Compared with MAX6388LT29D6-T, the MAX6388XS29D6-T offers smaller footprint and lower profile but higher thermal resistance; versus TPS3808G33DBVR, it provides tighter threshold accuracy, dual-supply capability, and push-pull drive - making it superior for space-constrained dual-rail designs requiring guaranteed reset signaling without external components.
Availability
MAX6388XS29D6-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS29D6-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 industrial, automotive, communications, and computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits optimized for battery-operated equipment and automotive systems requiring AEC-Q100 qualification, dual-voltage monitoring, and guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6388XS29D6-T and how stable is it over temperature?
The MAX6388XS29D6-T has a factory-set VCC reset threshold of 2.93V nominal, with ±2.5% tolerance guaranteed over the full operating temperature range of –40°C to +125°C. This stability is achieved through laser-trimmed bandgap reference circuitry and is documented in the Electrical Characteristics table under "VCC Reset Threshold" with tempco of 60ppm/°C. The MAX6388XS29D6-T maintains this accuracy without external calibration or compensation components.
Does MAX6388XS29D6-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6388XS29D6-T supports auxiliary voltage monitoring via its dedicated RESET IN pin. This high-impedance input compares the applied voltage against an internal 1.27V reference. To monitor a second rail (e.g., 5V or 12V), connect a resistor divider between that rail and ground, with the midpoint fed to RESET IN. The MAX6388XS29D6-T asserts reset if either VCC drops below 2.93V or the voltage at RESET IN falls below 1.27V - enabling true dual-supply fault detection.
What is the function of the RESET output on MAX6388XS29D6-T, and what are its drive capabilities?
The RESET output of the MAX6388XS29D6-T is an active-high push-pull driver, meaning it actively drives high during reset assertion and actively pulls low when deasserted. It guarantees VOL ≤ 0.3V at 80μA sink current and VOH ≥ 0.8×VCC at 150μA source current down to VCC = 1.0V. This eliminates the need for external pullup resistors and ensures clean, fast transitions directly compatible with standard microprocessor reset inputs.
Can MAX6388XS29D6-T operate reliably during severe supply brownout conditions?
Yes, the MAX6388XS29D6-T is guaranteed to maintain valid RESET output logic states down to VCC = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. Its internal regulator and comparator remain functional throughout this range, ensuring deterministic reset behavior even during deep brownouts. Unlike many supervisors that become undefined below 1.8V, the MAX6388XS29D6-T continues to assert or deassert RESET correctly - critical for fail-safe embedded systems.
What package type and footprint does MAX6388XS29D6-T use, and are land patterns available?
The MAX6388XS29D6-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 the Maxim Integrated website. This compact RoHS-compliant package supports reflow soldering at +260°C and is optimized for high-density PCB layouts in portable and industrial applications. Aetrix Electronics provides verified footprint libraries upon request.
MAX6388XS29D6-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:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS29D6-T FAQ
1.How can I place an order for MAX6388XS29D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS29D6-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 MAX6388XS29D6-T reliable?
The price and inventory of MAX6388XS29D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS29D6-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS29D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS29D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS29D6-T?
MAX6388XS29D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS29D6-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 MAX6388XS29D6-T?
For technical support, including MAX6388XS29D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS29D6-T requirements.
6.How does Aetrix verify that MAX6388XS29D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS29D6-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 MAX6388XS29D6-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS29D6-T?
All MAX6388XS29D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS29D6-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 MAX6388XS29D6-T part is unused and in its original packaging.
Return procedure for MAX6388XS29D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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