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Analog Devices Inc./Maxim Integrated MAX6388XS25D1-T
- Part No.:
- MAX6388XS25D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS25D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,304
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Product details
Overview
MAX6388XS25D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.50V 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 systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6388XS25D1-T datasheet, MAX6388XS25D1-T pinout, MAX6388XS25D1-T application, or MAX6388XS25D1-T equivalent, this device supports dual-supply monitoring (VCC + external resistor-divider on RESET IN), guarantees valid reset state down to VCC = 1V, and delivers precise timing with ±2.5% threshold accuracy across automotive temperature range.
Technical Context
The MAX6388XS25D1-T integrates a precision bandgap reference and comparator for VCC monitoring plus a separate +1.27V internal reference for the high-impedance RESET IN input. Its reset assertion logic triggers when either VCC falls below 2.50V or RESET IN drops below its derived threshold - enabling independent monitoring of core and I/O rails.
It features a fixed 1ms reset timeout after VCC recovery or RESET IN recovery, with no manual reset input (MR) - distinguishing it from MAX6384–MAX6386 and MAX6390 variants. The active-high push-pull output drives directly without external pullup, and output voltage is guaranteed to remain valid down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.50V (nominal), ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive temperature range |
| Reset Timeout Period | 1ms (minimum) - provides fast, deterministic reset release after supply stabilization |
| Supply Current | 3µA at VCC = 1.8V - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout or ultra-low-VCC startup |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and reduces BOM count |
| RESET IN Input Reference | +1.27V internal reference (±1.5% at +25°C) - allows user-defined secondary threshold via external resistor divider |
| Input Leakage (RESET IN) | ±1nA max - permits use of high-value resistors (>1MΩ) without threshold error |
Pinout & Package
MAX6388XS25D1-T is packaged in a RoHS-compliant 4-pin SC70 (package code X4+1, outline 21-0098), footprint-compatible with industry-standard 4-pin SC70 layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset monitor rail; powers internal circuitry and sets VCC-based reset threshold |
| 2 | RESET | Active-high push-pull reset output; asserts high during fault and remains high for ≥1ms after recovery |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for stable threshold accuracy |
| 4 | RESET IN | Auxiliary high-impedance input referenced to +1.27V; used to monitor second voltage rail via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC and external rail via RESET IN - enables robust dual-supply sequencing in SoC/FPGA systems |
| Factory-trimmed 2.50V threshold | ±2.5% accuracy over full –40°C to +125°C range - eliminates need for external calibration in automotive/industrial designs |
| 1ms minimum reset timeout | Guaranteed deassertion delay ensures μP clocks stabilize before release - prevents premature code execution |
| Valid reset down to VCC = 1V | Output logic state remains defined even during severe brownout - avoids floating reset line and undefined processor state |
| Low 3µA supply current at 1.8V | Enables integration into always-on subsystems without compromising battery life in portable equipment |
Applications
| Industrial PLC Power Sequencing | Automotive ADAS Camera Module |
|---|---|
Use Scenario: Monitoring both 3.3V I/O and 1.2V core supplies in programmable logic controllers during cold-start and load-dump conditions. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high RESET to FPGA and microcontroller only when both rails exceed thresholds, with 1ms hold time ensuring clock stability. Use Value: Prevents configuration corruption by guaranteeing synchronized release of two independent reset domains under transient stress. | Use Scenario: Supervising 5V camera sensor bias and 1.8V image signal processor core in automotive surround-view systems operating at –40°C to +105°C. IC Role / Device Role / Timing Role: Using VCC for main 5V rail and RESET IN (with R1/R2 divider) for 1.8V core - triggering unified reset on either rail failure. Use Value: Eliminates need for two discrete supervisors, reducing PCB area and BOM cost while maintaining AEC-Q100–compliant reliability. |
| Medical Wearable Battery Management | IoT Edge Node with Dual-Supply MCU |
Use Scenario: Ensuring safe boot of ultra-low-power ARM Cortex-M0+ in glucose monitor using CR2032 battery (2.0V–3.0V range). IC Role / Device Role / Timing Role: VCC monitored at 2.50V threshold; RESET IN unused or tied to VCC - providing early brownout warning before battery sag disables RF transmission. Use Value: 3µA quiescent current extends usable battery life by >15% versus higher-current alternatives, critical for FDA-cleared wearables. | Use Scenario: Supervising 3.3V wireless transceiver and 1.1V MCU core in LoRaWAN node powered by energy-harvesting source. IC Role / Device Role / Timing Role: RESET IN configured for 1.1V core via 1.27V reference and precision resistors; VCC monitors 3.3V rail - generating single active-high reset pulse on first fault. Use Value: Enables deterministic wake-from-reset behavior across variable input sources, avoiding race conditions during intermittent power availability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS25D1-T | Same 2.50V threshold, 1ms timeout, and RESET IN input, but features open-drain active-low RESET output requiring external pullup | Suitable where system-level reset bus is shared and pulled up externally; incompatible with direct-drive active-high logic | Select MAX6387XS25D1-T only if legacy board design uses open-drain reset topology or requires wired-OR capability |
| TLV803EB25DBZR | 2.5V threshold, 140ms timeout (not 1ms), no RESET IN input, SOT-23-3 package | Limited to single-rail monitoring; longer timeout may delay system boot unnecessarily in fast-start applications | Choose TLV803EB25DBZR only for cost-sensitive, single-supply designs where 140ms reset hold is acceptable and space constraints favor SOT-23 |
Compared with MAX6387XS25D1-T, MAX6388XS25D1-T eliminates external pullup components and simplifies layout; compared with TLV803EB25DBZR, it adds dual-rail monitoring and offers 140× shorter reset timeout - critical for responsive embedded boot sequences.
Availability
MAX6388XS25D1-T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, automotive ADAS camera modules, medical wearable battery management, and IoT edge nodes requiring stable component supply with AEC-Q100–compatible performance.
Supply support for MAX6388XS25D1-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 extended temperature operation.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-powered and automotive systems where accurate, low-quiescent-current reset functionality is essential.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS25D1-T?
The MAX6388XS25D1-T has a factory-set nominal VCC reset threshold of 2.50V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official datasheet (Rev 7, 8/20), and applies specifically to the "25" suffix variant. The threshold is trimmed during production and does not require external calibration.
Does MAX6388XS25D1-T include a manual reset input (MR)?
No, MAX6388XS25D1-T does not feature a manual reset input. According to the Selector Guide and Pin Configurations section, MR is present only on MAX6384/MAX6385/MAX6386 and MAX6390 variants. The MAX6388XS25D1-T pinout consists solely of VCC, RESET, GND, and RESET IN - with no MR terminal. This distinguishes it from functionally similar parts like MAX6385XS25D1-T.
How is the RESET IN input used, and what reference voltage does it employ?
The RESET IN input on MAX6388XS25D1-T compares the applied voltage against an internal +1.27V reference (±1.5% at +25°C, ±2.5% over temperature). To monitor a second supply rail, connect RESET IN to the center tap of an external resistor divider referenced to that rail. The threshold is calculated as VTH = 1.27V × (R1/R2 + 1), where R2 connects to GND and R1 to the monitored voltage. Input leakage is ≤±1nA, enabling high-precision divider design.
What is the guaranteed minimum reset timeout period for MAX6388XS25D1-T?
The guaranteed minimum reset timeout period for MAX6388XS25D1-T is 1ms, as specified by the "D1" suffix in the part number and confirmed in the Reset Timeout Delay table (page 8). This is the duration RESET remains asserted high after VCC or RESET IN recovers above their respective thresholds. The actual timeout may vary slightly with temperature and supply, but will never fall below 1ms under any operating condition.
Is MAX6388XS25D1-T qualified for automotive applications?
MAX6388XS25D1-T is not explicitly marked with the "/V" automotive qualification suffix in its ordering code, and the standard version is rated for –40°C to +125°C operation. While its temperature range meets AEC-Q100 Grade 2 requirements, official AEC-Q100 qualification applies only to parts ordered with the "/V" suffix (e.g., MAX6388XS25D1/V+T). For automotive production, confirm qualification status via Maxim's official automotive product list or contact Analog Devices support.
MAX6388XS25D1-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:
- 2.5V, 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
MAX6388XS25D1-T FAQ
1.How can I place an order for MAX6388XS25D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS25D1-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 MAX6388XS25D1-T reliable?
The price and inventory of MAX6388XS25D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS25D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS25D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS25D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS25D1-T?
MAX6388XS25D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS25D1-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 MAX6388XS25D1-T?
For technical support, including MAX6388XS25D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS25D1-T requirements.
6.How does Aetrix verify that MAX6388XS25D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS25D1-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 MAX6388XS25D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS25D1-T?
All MAX6388XS25D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS25D1-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 MAX6388XS25D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS25D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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