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Analog Devices Inc./Maxim Integrated MAX6388XS29D7-T
- Part No.:
- MAX6388XS29D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS29D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,406
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Product details
Overview
MAX6388XS29D7-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), 1200ms minimum VCC 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 dual-rail embedded systems.
For engineers reviewing the MAX6388XS29D7-T datasheet, MAX6388XS29D7-T pinout, MAX6388XS29D7-T application, or MAX6388XS29D7-T equivalent, key selection criteria include its 2.93V threshold accuracy, 1200ms VCC timeout, 4-pin SC70 package, RESET IN comparator interface, and compatibility with dual-supply power monitoring architectures.
Technical Context
The MAX6388XS29D7-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.93V threshold while simultaneously accepting an external voltage via RESET IN (compared to internal 1.27V reference). Its reset assertion logic triggers on either VCC drop below 2.93V or RESET IN drop below 1.27V, with independent timing control ensuring reliable brownout recovery.
It features a dedicated active-high push-pull RESET output capable of sourcing/sinking ≥150µA at VCC ≥1.8V, and includes negative-going VCC transient immunity up to 150µs for 100mV overdrive - critical for noisy industrial power rails. The device operates across –40°C to +125°C and supports AEC-Q100-compliant designs when ordered with /V suffix.
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/industrial temperature ranges |
| VCC Reset Timeout | 1200ms (min) - provides sufficient hold time for slow-ramping power supplies and complex μP initialization sequences |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP reset inputs |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable instrumentation |
| RESET IN Threshold | 1.27V (nominal), ±2.5% over –40°C to +125°C - allows precise secondary supply monitoring using external resistor divider |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Package | 4-pin SC70 (X4+1 outline) - 1.3mm × 1.3mm footprint ideal for space-constrained PCB layouts |
Pinout & Package
MAX6388XS29D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), with 0.65mm pitch and thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail - must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output - drives high during normal operation; pulls low only during reset assertion |
| 3 | GND | Analog/digital ground reference - requires low-impedance connection to system ground plane |
| 4 | RESET IN | Auxiliary voltage monitor input - high-impedance node (≤50nA leakage) for external resistor-divider-based threshold setting |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (2.93V) and external rail via RESET IN (1.27V reference) - enables robust dual-rail system reset coordination |
| Negative transient immunity | Rejects VCC glitches ≤150µs wide at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Low-voltage operation guarantee | Valid RESET output state maintained down to VCC = 1V - ensures deterministic behavior during deep brownout conditions |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range - eliminates need for external calibration in production |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on sensor nodes and portable medical devices |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors both 3.3V I/O rail and 5V core supply in programmable logic controller with dual-domain power architecture. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high reset to ARM Cortex-M7 MCU upon fault in either rail, with 1200ms timeout ensuring full FPGA configuration completion. Use Value: Prevents partial initialization by guaranteeing reset hold time exceeds worst-case power-up sequencing delays across two independent regulators. | Use Scenario: Supervises 12V-to-5V DC/DC converter output and 3.3V LDO output in body control unit exposed to load-dump transients. IC Role / Device Role / Timing Role: Primary VCC monitor (2.93V threshold) plus RESET IN interface to scaled-down 12V rail - detects both main supply collapse and alternator failure. Use Value: Enables fail-safe shutdown before CAN communication corruption occurs, leveraging 150µs transient immunity to ignore ignition-switch bounce. |
| Portable Medical Glucose Meter | Battery-Powered Smart Sensor Node |
Use Scenario: Powers on/off sequence control in handheld diagnostic device using single-cell Li-ion (2.8V–4.2V) with regulated 3.0V analog front-end. IC Role / Device Role / Timing Role: Resets ultra-low-power MCU when battery voltage drops below 2.93V, while RESET IN monitors analog supply to prevent erroneous ADC readings. Use Value: Eliminates false positives from analog rail noise by decoupling digital reset logic from analog domain fluctuations. | Use Scenario: Long-life environmental sensor node powered by CR2032 coin cell, requiring >5-year shelf life and cold-temperature operation. IC Role / Device Role / Timing Role: Low-current (3μA) supervisor enabling wake-on-reset functionality - asserts reset only when VCC falls below 2.93V or external battery monitor signal drops. Use Value: Extends operational lifetime by minimizing quiescent draw while maintaining guaranteed reset validity down to 1V during end-of-life battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT29D7-T | Same electrical specs but in 6-pin µDFN (L611+1) instead of 4-pin SC70 - larger footprint, lower θJA (477°C/W vs 322.6°C/W) | Suitable for thermally constrained designs where board area permits larger package | Select when thermal performance outweighs size constraints; not pin-compatible due to different pin count and layout |
| TPS3808G33DBVR | 3.3V fixed threshold (not 2.93V), 200ms default timeout (adjustable via capacitor), no RESET IN input - lacks dual-monitoring capability | Applicable only for single-rail 3.3V systems without auxiliary voltage supervision needs | Choose only if 2.93V threshold and RESET IN are unnecessary; requires redesign for dual-supply use cases |
Compared with MAX6388XS29D7-T, MAX6388LT29D7-T offers better thermal dissipation but occupies more PCB area, while TPS3808G33DBVR sacrifices threshold flexibility and dual-monitoring for simpler single-rail integration - neither provides identical dual-voltage supervision in a 4-pin SC70 form factor.
Availability
MAX6388XS29D7-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical glucose meters, and battery-powered smart sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6388XS29D7-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 medical applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for space-constrained, battery-sensitive, and thermally harsh environments - with MAX6388XS29D7-T specifically targeting dual-rail supervision in compact 4-pin SC70 packaging.
FAQ
What is the exact reset threshold voltage of MAX6388XS29D7-T and how stable is it over temperature?
The MAX6388XS29D7-T has a factory-set nominal VCC reset threshold of 2.93V, with guaranteed accuracy of ±2.5% 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 of the official datasheet. The MAX6388XS29D7-T maintains this tolerance without external calibration.
Does MAX6388XS29D7-T support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6388XS29D7-T supports dual-voltage supervision via its dedicated RESET IN pin, which compares an external voltage to an internal 1.27V reference. To monitor a second rail, connect a resistor divider between that rail and GND, feeding the midpoint to RESET IN. The MAX6388XS29D7-T asserts reset if either VCC drops below 2.93V or the voltage at RESET IN falls below 1.27V - enabling coordinated reset for multi-supply systems.
What is the function and timing behavior of the RESET output on MAX6388XS29D7-T?
The RESET output of MAX6388XS29D7-T is an active-high push-pull driver. It remains low during reset assertion (when VCC < 2.93V or RESET IN < 1.27V) and transitions high after the 1200ms minimum timeout period elapses once the monitored voltage(s) recover. The MAX6388XS29D7-T guarantees correct logic state down to VCC = 1V, eliminating need for external pullup resistors or level-shifting circuitry.
What package type and dimensions does MAX6388XS29D7-T use, and is it RoHS-compliant?
MAX6388XS29D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.3mm with 0.65mm pin pitch. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. Thermal resistance is θJA = 322.6°C/W on a multilayer PCB, and the package supports reflow soldering per JEDEC J-STD-020 standards.
How does MAX6388XS29D7-T handle power supply transients, and what protection does it offer?
MAX6388XS29D7-T provides built-in immunity to negative-going VCC transients: it will not assert reset for glitches ≤150µs wide when the overdrive (VTH – VCC) is 100mV. This is validated in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive." Adding a 0.1µF ceramic capacitor close to the VCC pin further enhances immunity - a design practice explicitly recommended in the MAX6388XS29D7-T datasheet.
MAX6388XS29D7-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:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS29D7-T FAQ
1.How can I place an order for MAX6388XS29D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS29D7-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 MAX6388XS29D7-T reliable?
The price and inventory of MAX6388XS29D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS29D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS29D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS29D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS29D7-T?
MAX6388XS29D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS29D7-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 MAX6388XS29D7-T?
For technical support, including MAX6388XS29D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS29D7-T requirements.
6.How does Aetrix verify that MAX6388XS29D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS29D7-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 MAX6388XS29D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS29D7-T?
All MAX6388XS29D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS29D7-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 MAX6388XS29D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS29D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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