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Analog Devices Inc./Maxim Integrated MAX6388XS27D1-T
- Part No.:
- MAX6388XS27D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS27D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,653
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Product details
Overview
MAX6388XS27D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.70V 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 consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered instrumentation and dual-rail embedded systems.
For engineers reviewing the MAX6388XS27D1-T datasheet, MAX6388XS27D1-T pinout, MAX6388XS27D1-T application, or MAX6388XS27D1-T equivalent, key selection criteria include its 2.70V threshold accuracy, 1ms timeout, 4-pin SC70 package, RESET IN comparator interface, and compatibility with dual-supply brownout detection in portable industrial controllers.
Technical Context
The MAX6388XS27D1-T integrates a precision voltage comparator monitoring VCC against a trimmed 2.70V threshold and a second comparator monitoring RESET IN against an internal 1.27V reference. Its reset assertion logic triggers on either VCC < 2.70V or RESET IN < 1.27V, with independent timing control via a monolithic timer.
It features an active-high push-pull RESET output capable of sourcing 150µA at VCC ≥ 1.8V while maintaining VOH ≥ 0.8×VCC, and supports external resistor-divider configuration on RESET IN to monitor secondary supply rails - enabling flexible dual-threshold supervision without external comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.70V ±2.5% (–40°C to +125°C); ensures reliable power-on reset for 2.8V/3.3V core supplies |
| RESET Timeout Period | 1ms minimum; provides sufficient hold time for μP initialization after power stabilization |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup and drives high-impedance μP reset inputs directly |
| RESET IN Threshold | 1.27V ±2.5% (–40°C to +125°C); allows precise secondary rail monitoring via resistor divider |
| Operating Voltage Range | 1.0V to 5.5V; guarantees functional reset assertion even during deep brownout conditions |
| Reset Propagation Delay | 35µs (VCC falling); fast response to transient dips avoids spurious resets in noisy environments |
Pinout & Package
MAX6388XS27D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.2mm × 1.6mm × 0.75mm, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset threshold monitor; accepts 1.0V–5.5V; powers internal comparators and timer |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition; sinks 80µA at VCC ≥ 1.0V with VOL ≤ 0.3V |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | Auxiliary voltage monitor input; high-impedance (≤50nA leakage); compared to 1.27V internal reference for dual-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables single-chip brownout protection for I/O + core dual-supply systems |
| Factory-trimmed threshold | 2.70V reset point with ±2.5% tolerance over full temperature range eliminates external calibration components |
| Ultra-low quiescent current | 3μA at 1.8V extends battery life in always-on sensor nodes without compromising reset reliability |
| Guaranteed operation down to VCC = 1V | Ensures deterministic reset behavior during severe undervoltage events before power collapse |
| Negative-going transient immunity | Rejects sub-100ns VCC glitches up to 100mV below threshold, reducing false triggers in electrically noisy environments |
Applications
| Battery-Powered Data Loggers | Dual-Rail Industrial Controllers |
|---|---|
Use Scenario: Long-term environmental monitoring using coin-cell power and flash memory storage. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and backup 1.8V RTC rail; asserts reset if either drops below threshold during cold-start or battery sag. Use Value: Prevents corrupted writes to nonvolatile memory by holding μP in reset until both rails stabilize within 1ms. | Use Scenario: PLC I/O module with separate 24V field-side and 3.3V logic-side supplies. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail (VCC) and scaled-down 24V field rail (via RESET IN divider); initiates system-wide reset on either fault. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area by 35%. |
| Portable Medical Sensors | Low-Power Edge AI Nodes |
Use Scenario: Wearable ECG patch powered by rechargeable Li-ion with variable voltage (3.0V–4.2V). IC Role / Device Role / Timing Role: Detects brownout during discharge cycle using 2.70V VCC threshold; uses RESET IN to verify analog front-end bias stability. Use Value: Ensures clinical-grade data integrity by preventing ADC sampling during unstable supply conditions. | Use Scenario: Wireless vibration sensor with ultra-low-power MCU and wake-on-event accelerator. IC Role / Device Role / Timing Role: Provides 1ms reset pulse synchronized to power-up sequence; RESET IN monitors LDO output feeding AI accelerator core. Use Value: Guarantees deterministic boot state for neural inference engine, avoiding undefined memory access on first clock cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT27D1-T | Same electrical specs but in 6-pin μDFN (1.5mm × 1.5mm) instead of 4-pin SC70; higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for thermally demanding industrial environments where μDFN's larger pad improves heat dissipation | Select when board layout allows larger footprint and thermal management is prioritized over size |
| TPS3808G125DBVR | 2.5V fixed threshold (not 2.70V); 20ms min timeout (not 1ms); no RESET IN input; SOT-23-5 package | Lacks dual-supply monitoring capability and offers longer minimum timeout, limiting use in fast-boot systems | Choose only if 2.5V threshold suffices and auxiliary rail monitoring is unnecessary |
Compared with MAX6388LT27D1-T, the MAX6388XS27D1-T saves 40% board area in compact wearables; versus TPS3808G125DBVR, it delivers precise 2.70V detection, 1ms timing, and dual-rail supervision - critical for deterministic boot in resource-constrained edge devices.
Availability
MAX6388XS27D1-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, dual-rail industrial controllers, and portable medical sensors requiring stable component supply across automotive-grade temperature ranges (–40°C to +125°C).
Supply support for MAX6388XS27D1-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 power, sensing, and interface applications, with emphasis on low-power, high-reliability solutions for industrial and automotive markets.
The MAX6381–MAX6390 family was engineered specifically for microprocessor reset supervision in space- and power-constrained systems, delivering factory-trimmed thresholds, multiple timeout options, and dual-supply monitoring in miniature packages.
FAQ
What is the exact reset threshold voltage of the MAX6388XS27D1-T and how stable is it over temperature?
The MAX6388XS27D1-T has a factory-set VCC reset threshold of 2.70V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This stability is achieved through laser trimming during production and is confirmed in the Electrical Characteristics table under "VCC Reset Threshold" with min/nom/max values of 2.63V/2.70V/2.77V at +25°C and maintained across temperature via low tempco design (60ppm/°C). The MAX6388XS27D1-T meets this spec without external calibration.
Does the MAX6388XS27D1-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6388XS27D1-T supports dual-voltage supervision via its dedicated RESET IN pin, which connects to an internal comparator referenced to a precise 1.27V bandgap. To monitor a secondary rail (e.g., 5V or 12V), users configure a resistor divider between that rail and GND, connecting the midpoint to RESET IN. The MAX6388XS27D1-T asserts reset if either VCC falls below 2.70V or the divided voltage at RESET IN drops below 1.27V - enabling single-chip protection for I/O + core supply pairs.
What is the minimum reset timeout period of the MAX6388XS27D1-T, and why is it important for microcontroller startup?
The MAX6388XS27D1-T provides a minimum reset timeout period of 1ms, as indicated by the "D1" suffix in its part number. This duration ensures the microcontroller remains held in reset long enough for internal oscillators to stabilize, PLLs to lock, and power supplies to settle - preventing erratic execution during early boot. The 1ms timeout is especially valuable in fast-boot applications like edge AI nodes, where the MAX6388XS27D1-T guarantees deterministic initialization without over-provisioning delay.
Can the MAX6388XS27D1-T operate reliably at very low supply voltages, and what is its lower limit?
Yes, the MAX6388XS27D1-T is guaranteed to operate correctly down to VCC = 1.0V, with its reset output remaining logically valid (VOH ≥ 0.8×VCC and VOL ≤ 0.3V) across this entire range. This capability ensures robust brownout detection even during deep discharge of lithium batteries or sudden load transients. Unlike many supervisors that fail below 1.6V, the MAX6388XS27D1-T maintains functional reset assertion until VCC reaches 1.0V - a critical feature for safety-critical portable medical sensors relying on the MAX6388XS27D1-T.
What package type and dimensions does the MAX6388XS27D1-T use, and is it RoHS-compliant?
The MAX6388XS27D1-T is packaged in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 1.2mm × 1.6mm × 0.75mm with a standard pitch of 0.65mm. The "+T" suffix in the part number explicitly denotes RoHS compliance. This ultra-compact footprint enables high-density layouts in wearable electronics and miniaturized industrial modules where board space is constrained - a key advantage of the MAX6388XS27D1-T over larger alternatives like μDFN or SOIC packages.
MAX6388XS27D1-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:
- 2.7V, 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
MAX6388XS27D1-T FAQ
1.How can I place an order for MAX6388XS27D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS27D1-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 MAX6388XS27D1-T reliable?
The price and inventory of MAX6388XS27D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS27D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS27D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS27D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS27D1-T?
MAX6388XS27D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS27D1-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 MAX6388XS27D1-T?
For technical support, including MAX6388XS27D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS27D1-T requirements.
6.How does Aetrix verify that MAX6388XS27D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS27D1-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 MAX6388XS27D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS27D1-T?
All MAX6388XS27D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS27D1-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 MAX6388XS27D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS27D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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