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Analog Devices Inc./Maxim Integrated MAX6388XS16D1-T
- Part No.:
- MAX6388XS16D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS16D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,507
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Product details
Overview
MAX6388XS16D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.58V VCC reset threshold (±2.5% over −40°C to +125°C), 1ms minimum 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 MAX6388XS16D1-T datasheet, MAX6388XS16D1-T pinout, MAX6388XS16D1-T application, or MAX6388XS16D1-T equivalent, key selection criteria include its 1.58V reset threshold accuracy, 1ms reset timeout, 4-pin SC70 package footprint, dual-supply monitoring capability via RESET IN, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS16D1-T integrates a precision voltage comparator for VCC monitoring against a fixed 1.58V threshold and a separate high-impedance RESET IN comparator referenced to an internal 1.27V bandgap. Reset assertion occurs when either VCC falls below 1.58V or RESET IN drops below 1.27V, with independent timing control ensuring deterministic behavior during power transients.
Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly after the 1ms timeout; the RESET IN pin supports user-defined thresholds via external resistor dividers, enabling flexible dual-rail supervision without additional components. Negative-going VCC transient immunity is characterized up to 35µs for 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V ±2.5% (−40°C to +125°C); ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout | 1ms minimum; provides sufficient hold time for microprocessor initialization after power stabilization |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered portable instruments |
| Operating Voltage | 1.0V to 5.5V; supports valid reset assertion even during deep brownout down to 1V VCC |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup and simplifies interface to μP reset inputs |
| RESET IN Threshold | 1.27V ±2.5% (−40°C to +125°C); allows precise secondary voltage monitoring via resistor divider |
| VCC Transient Immunity | 35µs max duration for 100mV overdrive; suppresses false resets from short power glitches |
Pinout & Package
MAX6388XS16D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained PCB layouts in portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and feeds VCC comparator |
| 2 | RESET | Active-high push-pull reset output; asserts high during VCC undervoltage or RESET IN fault, holds for 1ms timeout |
| 3 | GND | Analog/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 reference; enables dual-rail supervision with external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (1.58V threshold) and external rail via RESET IN (1.27V reference), eliminating need for second supervisor IC |
| Low-power operation | 3μA supply current at 1.8V enables integration into always-on sensor nodes without compromising battery life |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1V, ensuring deterministic behavior during deep brownout recovery |
| Transient-immune design | Characterized immunity to negative-going VCC transients up to 35µs, reducing susceptibility to noise-induced false resets |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range eliminates need for external calibration |
Applications
| Industrial Controllers | Portable Medical Instruments |
|---|---|
Use Scenario: PLC I/O modules requiring fail-safe power-up sequencing and brownout recovery in harsh factory environments. IC Role / Device Role / Timing Role: Supervises main 3.3V logic rail and auxiliary 2.5V analog supply via RESET IN; asserts active-high reset for 1ms to hold MCU in reset until both rails stabilize. Use Value: Prevents firmware corruption during unstable AC line conditions by enforcing minimum 1ms reset hold time with dual-rail validation. | Use Scenario: Handheld glucose meters powered by single CR2032 coin cell, where supply voltage decays from 3.0V to 1.8V over battery life. IC Role / Device Role / Timing Role: Monitors declining VCC against 1.58V threshold while using RESET IN to track regulated 1.8V analog rail; guarantees reset assertion down to 1.0V VCC. Use Value: Enables full battery utilization with no premature shutdown-3μA quiescent current extends operational life beyond 5 years. |
| Automotive Body Control Modules | Dual-Rail FPGA Power Management |
Use Scenario: BCM subassemblies exposed to cold-cranking (4.5V dips) and load-dump transients in 12V systems. IC Role / Device Role / Timing Role: Supervises 5.0V microcontroller supply and 3.3V CAN transceiver rail via RESET IN; rejects <35µs glitches per spec. Use Value: Maintains functional safety integrity by preventing spurious resets during engine cranking, meeting AEC-Q100 requirements. | Use Scenario: FPGA-based test equipment requiring coordinated reset of core (1.2V) and I/O (3.3V) supplies during hot-swap events. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 1.2V core rail against scaled 1.27V reference (via R-divider); VCC monitors 3.3V I/O rail at 1.58V threshold. Use Value: Ensures FPGA enters known state only after both rails exceed minimum operating voltages, avoiding configuration errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT16D1-T | Same electrical specs but in 6-pin µDFN (L611+1) instead of 4-pin SC70; higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Better suited for thermally demanding industrial PCBs with multilayer copper planes; requires different land pattern (90-0080 vs. 90-0187) | Select LT version when board layout allows larger footprint and thermal management prioritizes junction-to-ambient dissipation |
| TPS3808G15DBVR | 1.55V threshold (±0.5%), 20ms min timeout, SOT-23-5; lacks RESET IN input and dual-supply capability | Single-rail only; suitable for cost-sensitive consumer electronics where auxiliary monitoring is unnecessary | Choose TPS3808G15DBVR only if dual-voltage supervision is not required and longer reset timeout is acceptable |
Compared with MAX6388LT16D1-T, the MAX6388XS16D1-T offers identical supervision functionality in a smaller 4-pin SC70 package with lower thermal resistance on multilayer boards, while the TPS3808G15DBVR provides tighter threshold accuracy but omits the critical RESET IN feature needed for dual-rail systems.
Availability
MAX6388XS16D1-T is available at Aetrix Electronics and suitable for industrial controllers, portable medical instruments, automotive body control modules, and dual-rail FPGA power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS16D1-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, and computing applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for battery-powered and thermally constrained systems requiring guaranteed reset behavior from 1.0V VCC and immunity to power transients.
FAQ
What is the exact reset threshold voltage of MAX6388XS16D1-T and how stable is it over temperature?
The MAX6388XS16D1-T has a factory-set VCC reset threshold of 1.58V, specified with ±2.5% tolerance over the full −40°C to +125°C operating range. This stability is achieved through laser-trimmed BiCMOS process technology and is guaranteed-not typical-across temperature, ensuring consistent brownout detection without recalibration in automotive or industrial deployments.
Does MAX6388XS16D1-T support monitoring of two independent power rails simultaneously?
Yes, MAX6388XS16D1-T supports dual-rail supervision: VCC is monitored against its fixed 1.58V threshold, while the RESET IN pin compares an external voltage to an internal 1.27V reference. When either rail falls below its respective threshold, the active-high RESET output asserts for the 1ms timeout period-enabling robust power sequencing in systems with core and I/O supplies.
What is the minimum supply voltage at which MAX6388XS16D1-T guarantees correct RESET output logic state?
The MAX6388XS16D1-T guarantees valid RESET output logic levels down to VCC = 1.0V. Below this, the internal comparators and output driver may not function reliably. This 1.0V lower limit ensures deterministic reset behavior during deep brownout recovery, unlike many supervisors that require ≥1.5V to maintain output integrity.
Can MAX6388XS16D1-T replace MAX809 or MAX6326 in existing designs?
MAX6388XS16D1-T is not pin-compatible with MAX809 or MAX6326 due to differing pin count (4-pin SC70 vs. 3-pin SOT-23) and pin functions (RESET IN added). While electrically comparable for single-rail use, the MAX6388XS16D1-T requires PCB layout revision. For drop-in replacement, consider MAX6381XR16D1-T (3-pin SC70, same threshold/timing, no RESET IN).
What is the maximum allowable negative-going VCC transient duration that MAX6388XS16D1-T can reject without asserting reset?
At 100mV overdrive (i.e., VCC falling 100mV below the 1.58V threshold), MAX6388XS16D1-T rejects transients up to 35µs in duration without issuing a reset pulse. This immunity is characterized per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Comparator Overdrive" and enables reliable operation in noisy power environments such as automotive cold-cranking.
MAX6388XS16D1-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:
- 1.58V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS16D1-T FAQ
1.How can I place an order for MAX6388XS16D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS16D1-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 MAX6388XS16D1-T reliable?
The price and inventory of MAX6388XS16D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS16D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS16D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS16D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS16D1-T?
MAX6388XS16D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS16D1-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 MAX6388XS16D1-T?
For technical support, including MAX6388XS16D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS16D1-T requirements.
6.How does Aetrix verify that MAX6388XS16D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS16D1-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 MAX6388XS16D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS16D1-T?
All MAX6388XS16D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS16D1-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 MAX6388XS16D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS16D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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