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Analog Devices Inc./Maxim Integrated MAX6388XS22D2-T
- Part No.:
- MAX6388XS22D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS22D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,430
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Product details
Overview
MAX6388XS22D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.19V VCC reset threshold (±2.5% over -40°C to +125°C), 20ms 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 embedded controllers requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6388XS22D2-T datasheet, MAX6388XS22D2-T pinout, MAX6388XS22D2-T application, or MAX6388XS22D2-T equivalent, key selection criteria include its 2.19V reset threshold accuracy, 20ms timeout, 4-pin SC70 package, dual-monitoring capability via RESET IN, and compatibility with systems requiring active-high reset assertion without external pullup.
Technical Context
The MAX6388XS22D2-T integrates a precision voltage comparator for VCC monitoring and a separate +1.27V reference-based comparator for the auxiliary RESET IN pin, enabling independent reset assertion when either supply falls below its threshold. Its internal timer ensures reset remains asserted for ≥20ms after recovery.
It features an active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC) and sinking 3.2mA (VOL ≤ 0.4V), with guaranteed logic validity down to VCC = 1V. The RESET IN input exhibits ≤50nA leakage and supports resistor-divider configuration for user-defined thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout | 20ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable devices |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor, reduces BOM count |
| Auxiliary Input | RESET IN with +1.27V reference - allows monitoring of second supply (e.g., I/O rail) using external resistor divider |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V VCC |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained PCBs |
Pinout & Package
MAX6388XS22D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), featuring 1.6mm × 1.6mm body size and 0.65mm lead pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers device and triggers reset when falling below 2.19V |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; no external pullup required |
| 3 | GND | Ground reference for all internal circuits and comparators |
| 4 | RESET IN | Auxiliary voltage monitor input - compared to +1.27V internal reference; asserts reset if voltage drops below threshold set by external divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring | Simultaneous VCC and RESET IN monitoring enables robust power sequencing in dual-rail systems (e.g., core/I/O) |
| Factory-trimmed threshold | 2.19V ±2.5% over full temperature range eliminates need for external calibration or trimming components |
| Low quiescent current | 3μA at 1.8V extends battery life in portable medical sensors and IoT edge nodes |
| Valid reset down to 1V VCC | Ensures deterministic μP reset behavior during severe brownout, preventing undefined states |
| Negative transient immunity | Withstands short VCC glitches (e.g., <1µs at 100mV overdrive) without spurious reset assertion |
Applications
| Battery-Powered Instrumentation | Industrial Controller Power Management |
|---|---|
Use Scenario: Handheld multimeter with Li-ion battery and dual-rail (3.3V core / 1.8V sensor) supply. IC Role / Device Role / Timing Role: Monitors both VCC and RESET IN (tapped from 1.8V rail) to assert active-high reset until both supplies stabilize post-power-up. Use Value: Prevents firmware execution before sensor bias rails are valid, eliminating measurement corruption during startup. | Use Scenario: PLC I/O module with isolated 5V and 3.3V domains powering FPGA and analog front-end. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 3.3V I/O rail while VCC tracks 5V system rail; asserts reset if either drops below threshold. Use Value: Ensures synchronized reset across mixed-voltage subsystems, avoiding bus contention or latch-up during power transitions. |
| Automotive Body Control Module | Medical Wearable Sensor Node |
Use Scenario: BCM microcontroller powered from vehicle battery (9V–16V) with LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: MAX6388XS22D2-T monitors regulated 3.3V rail and uses RESET IN to supervise backup 1.8V RTC supply. Use Value: Guarantees safe MCU reset during cold-crank (battery dip to 6V) and maintains RTC integrity during main rail dropout. | Use Scenario: ECG patch with CR2032 coin cell, ultra-low-power MCU, and analog signal chain. IC Role / Device Role / Timing Role: Supervises 1.8V supply generated by buck-boost converter; RESET IN monitors battery voltage via resistive divider. Use Value: Triggers graceful shutdown and data save before battery depletion, preserving clinical data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT22D2-T | Same electrical specs but in 6-pin µDFN (L611+1) instead of 4-pin SC70; includes NC pins not present on SC70 variant | Requires different PCB footprint and land pattern; suitable for designs needing thermal performance margin (θJA = 477°C/W vs. 322.6°C/W) | Select when board layout allows larger package or thermal dissipation is critical; not pin-compatible with MAX6388XS22D2-T |
| TLV809K22DBZR | 2.2V reset threshold, 20ms timeout, active-high push-pull, but no RESET IN input; 3-pin SOT-23 package | Lacks dual-supply monitoring capability; limited to single-rail applications | Choose only for cost-sensitive single-supply systems where auxiliary monitoring is unnecessary |
Compared with MAX6388LT22D2-T, the MAX6388XS22D2-T offers identical supervision functionality in a smaller 4-pin SC70 footprint, while TLV809K22DBZR provides basic reset capability at lower cost but omits the critical dual-monitoring feature required for complex power architectures.
Availability
MAX6388XS22D2-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controller power management, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS22D2-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 supervisory circuits optimized for space-constrained, battery-operated, and automotive systems requiring guaranteed reset behavior across wide temperature and supply ranges.
FAQ
What is the exact reset threshold voltage of MAX6388XS22D2-T and how stable is it over temperature?
The MAX6388XS22D2-T has a factory-set VCC reset threshold of 2.19V, specified with ±2.5% tolerance over the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimmed internal references and low-tempco design, ensuring consistent brownout detection without external calibration. The MAX6388XS22D2-T maintains this accuracy across automotive and industrial environments where supply rails may fluctuate under thermal stress.
Does MAX6388XS22D2-T support monitoring of two independent power supplies?
Yes, the MAX6388XS22D2-T supports dual-supply monitoring: its VCC pin monitors the main supply, while the dedicated RESET IN pin compares an external voltage against an internal +1.27V reference. By connecting a resistor divider to RESET IN, users can configure a second reset threshold for a different rail (e.g., 1.8V I/O supply). Reset asserts if either VCC falls below 2.19V or the RESET IN voltage drops below its configured threshold - a capability confirmed in the device's Pin Description and Applications Information sections.
What is the function of the RESET output on MAX6388XS22D2-T and what drive strength does it provide?
The RESET output of the MAX6388XS22D2-T is an active-high push-pull driver, meaning it actively drives high during reset assertion and actively pulls low when deasserted. It sources up to 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC) and sinks up to 3.2mA (VOL ≤ 0.4V), eliminating the need for an external pullup resistor. This design simplifies circuitry and improves noise immunity compared to open-drain alternatives, and is explicitly documented in the Electrical Characteristics table and Pin Description for MAX6388XS22D2-T.
Can MAX6388XS22D2-T operate reliably at very low supply voltages?
Yes, the MAX6388XS22D2-T guarantees correct reset output logic state down to VCC = 1.0V, as stated in the Absolute Maximum Ratings and Detailed Description sections. This ensures deterministic behavior during deep brownout conditions where other supervisors may fail or float. Its 3μA supply current at +1.8V further supports ultra-low-power operation, making the MAX6388XS22D2-T suitable for energy-harvesting and long-life battery applications where supply voltage sag is common.
What package type and footprint does MAX6388XS22D2-T use, and is it RoHS-compliant?
The MAX6388XS22D2-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm with 0.65mm lead pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact, surface-mount package enables high-density layouts in portable and wearable electronics, and its thermal resistance (θJA = 322.6°C/W on multilayer board) is validated per JEDEC JESD51-7 - all details confirmed in the official Package Information section.
MAX6388XS22D2-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:
- 2.19V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS22D2-T FAQ
1.How can I place an order for MAX6388XS22D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS22D2-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 MAX6388XS22D2-T reliable?
The price and inventory of MAX6388XS22D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS22D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS22D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS22D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS22D2-T?
MAX6388XS22D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS22D2-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 MAX6388XS22D2-T?
For technical support, including MAX6388XS22D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS22D2-T requirements.
6.How does Aetrix verify that MAX6388XS22D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS22D2-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 MAX6388XS22D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS22D2-T?
All MAX6388XS22D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS22D2-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 MAX6388XS22D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS22D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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