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Analog Devices Inc./Maxim Integrated MAX6388XS32D3-T
- Part No.:
- MAX6388XS32D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS32D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,728
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Product details
Overview
MAX6388XS32D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.20V ±2.5% reset threshold, and 140ms minimum VCC reset timeout. It monitors VCC from +1.0V to +5.5V, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in dual-voltage systems requiring reliable power-on reset for critical μP supervision.
For engineers reviewing the MAX6388XS32D3-T datasheet, MAX6388XS32D3-T pinout, MAX6388XS32D3-T application, or MAX6388XS32D3-T equivalent, key selection criteria include its 4-pin SC70 package, auxiliary RESET IN input for secondary voltage monitoring, ±2.5% threshold accuracy over –40°C to +125°C, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Technical Context
The MAX6388XS32D3-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 3.20V threshold, asserting RESET when VCC falls below that level and holding it active for ≥140ms after VCC recovers. Its auxiliary RESET IN input compares external voltages to an internal +1.27V reference, enabling dual-supply monitoring via resistor-divider networks.
It features an active-high push-pull RESET output capable of sourcing ≥500µA at VCC ≥ 2.5V while maintaining VOH ≥ 0.8×VCC, and guarantees correct logic state down to VCC = 1V. The device uses BiCMOS process technology and is AEC-Q100 qualified in /V versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2.5% over –40°C to +125°C - ensures stable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 140ms (min) - provides sufficient hold time for slow-ramping power supplies and system initialization |
| Supply Current | 3μA at +1.8V - enables ultra-low-power operation in battery-backed or energy-constrained applications |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset inputs |
| Auxiliary Input | RESET IN with +1.27V internal reference - allows user-configurable second-voltage monitoring via external resistor divider |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and harsh industrial environments |
Pinout & Package
MAX6388XS32D3-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, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and serves as main reset trigger source |
| 2 | RESET | Active-high push-pull reset output; drives high during fault condition and remains high for ≥140ms after recovery |
| 3 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection |
| 4 | RESET IN | Auxiliary voltage monitor input; compared to +1.27V internal reference to enable dual-supply supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN input with programmable threshold using resistor divider |
| Negative transient immunity | Withstands VCC glitches ≤35µs duration at 100mV overdrive without false reset assertion |
| Low-voltage operation guarantee | RESET output logic state remains valid down to VCC = 1V - critical for fail-safe behavior during deep brownout |
| Factory-trimmed precision | ±2.5% reset threshold accuracy over full temperature range eliminates need for external calibration |
| Ultra-low quiescent current | 3μA at +1.8V enables multi-year battery life in portable and remote sensor applications |
Applications
| Power-On Reset for Dual-Rail Microcontrollers | Battery-Powered Instrumentation Supervision |
|---|---|
Use Scenario: A microcontroller powered by separate core (1.8V) and I/O (3.3V) rails requires coordinated reset assertion until both supplies stabilize. IC Role / Device Role / Timing Role: MAX6388XS32D3-T monitors 3.3V rail directly at VCC and 1.8V rail via RESET IN divider; asserts active-high RESET until both exceed thresholds and timeout expires. Use Value: Prevents partial initialization and bus contention by ensuring both supply domains are fully regulated before release. | Use Scenario: Handheld test equipment operates from a single Li-ion cell (2.8V–4.2V) with internal LDOs generating 1.8V and 3.3V rails. IC Role / Device Role / Timing Role: MAX6388XS32D3-T supervises main 3.3V rail and uses RESET IN to monitor 1.8V core voltage, providing early warning of LDO failure. Use Value: Enables graceful shutdown and data preservation before brownout-induced corruption occurs. |
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Monitoring |
Use Scenario: BCM MCU must remain held in reset during cold-crank events where battery voltage dips to 3.0V for >100ms. IC Role / Device Role / Timing Role: MAX6388XS32D3-T's 3.20V threshold and 140ms timeout ensure reset remains asserted throughout crank, while RESET IN monitors 5V CAN transceiver supply. Use Value: Eliminates spurious reboots and communication loss during engine start-up, meeting ISO 16750-2 requirements. | Use Scenario: PLC backplane supplies 24V DC converted to 5V and 3.3V for digital I/O modules; undervoltage on either rail must trigger system halt. IC Role / Device Role / Timing Role: MAX6388XS32D3-T monitors 5V rail at VCC and 3.3V rail at RESET IN, asserting RESET if either drops below respective thresholds. Use Value: Provides deterministic fault response without software intervention, improving functional safety compliance (IEC 61508). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT32D3-T | Same electrical specs but in 6-pin μDFN package; higher thermal resistance (θJA = 477°C/W) and larger footprint | Suitable for space-constrained PCBs where SC70 is unavailable; requires different land pattern and layout | Select when board real estate allows larger package and thermal performance is less critical than SC70 |
| TLV809E32DBZR | 3.2V reset threshold, 140ms timeout, but no RESET IN input; SOT-23-3 package; ±1.5% threshold accuracy | Limited to single-rail monitoring; lacks dual-supply capability and automotive temp range (–40°C to +125°C) | Choose for cost-sensitive, single-rail applications where auxiliary monitoring is unnecessary |
Compared with MAX6388XS32D3-T, the μDFN variant offers identical functionality in a larger package better suited for high-reliability thermal environments, while TLV809E32DBZR trades dual-monitoring capability and extended temperature support for lower cost and smaller pin count in simpler designs.
Availability
MAX6388XS32D3-T is available at Aetrix Electronics and suitable for dual-voltage systems, battery-powered instrumentation, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS32D3-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 computing applications.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits optimized for reliable power-on reset and brownout protection in space- and energy-constrained systems.
FAQ
What is the exact reset threshold voltage of MAX6388XS32D3-T and how is it specified?
The MAX6388XS32D3-T has a factory-set nominal reset threshold of 3.20V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This means the actual threshold falls between 3.12V and 3.28V at +25°C, and between 3.12V and 3.28V across temperature. The "32" suffix in the part number explicitly denotes the 3.20V threshold per Maxim's ordering guide.
Does MAX6388XS32D3-T support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6388XS32D3-T supports dual-voltage monitoring via its dedicated RESET IN pin. This pin connects to an internal comparator referenced to +1.27V. To monitor a second rail (e.g., 1.8V), a resistor divider is placed between that rail and ground, with the midpoint connected to RESET IN. The divider ratio sets the effective threshold using VTH = 1.27V × (R1/R2 + 1), enabling precise user-defined supervision of auxiliary supplies.
What is the function and timing behavior of the RESET output on MAX6388XS32D3-T?
The RESET output of MAX6388XS32D3-T is an active-high push-pull driver. It asserts high when VCC falls below 3.20V or when the voltage at RESET IN drops below +1.27V, and remains high for a minimum of 140ms after both monitored voltages recover above their thresholds. This ensures the connected microprocessor receives a clean, glitch-free reset pulse of guaranteed duration, eliminating need for external RC timing components.
Can MAX6388XS32D3-T operate reliably during deep brownout conditions, and what is its minimum functional VCC?
Yes, MAX6388XS32D3-T guarantees correct RESET output logic state down to VCC = 1.0V, as confirmed in its Absolute Maximum Ratings and Electrical Characteristics tables. This ensures fail-safe behavior during severe brownout events where supply voltage collapses well below nominal levels, allowing the host system to enter safe states before complete power loss.
Is MAX6388XS32D3-T qualified for automotive applications, and what package options support AEC-Q100?
The MAX6388XS32D3-T itself is not automotive-qualified; only versions with the "/V" suffix (e.g., MAX6388XS32D3/V+T) are AEC-Q100 qualified. The "+T" in the part number indicates RoHS-compliant packaging, but automotive qualification requires explicit /V marking in the ordering code. For automotive use, select MAX6388XS32D3/V+T - same electrical specs, certified for –40°C to +125°C operation in vehicle environments.
MAX6388XS32D3-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:
- 3.2V, 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
MAX6388XS32D3-T FAQ
1.How can I place an order for MAX6388XS32D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS32D3-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 MAX6388XS32D3-T reliable?
The price and inventory of MAX6388XS32D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS32D3-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS32D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS32D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS32D3-T?
MAX6388XS32D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS32D3-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 MAX6388XS32D3-T?
For technical support, including MAX6388XS32D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS32D3-T requirements.
6.How does Aetrix verify that MAX6388XS32D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS32D3-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 MAX6388XS32D3-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS32D3-T?
All MAX6388XS32D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS32D3-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 MAX6388XS32D3-T part is unused and in its original packaging.
Return procedure for MAX6388XS32D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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