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Analog Devices Inc./Maxim Integrated MAX6388XS18D5-T
- Part No.:
- MAX6388XS18D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS18D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,030
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Product details
Overview
MAX6388XS18D5-T from Maxim Integrated is a low-power, single-supply microprocessor supervisory circuit with active-high push-pull reset output, 1.8V factory-set reset threshold (±2.5% over -40°C to +125°C), 280ms minimum VCC 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 brownout detection.
For engineers reviewing the MAX6388XS18D5-T datasheet, MAX6388XS18D5-T pinout, MAX6388XS18D5-T application, or MAX6388XS18D5-T equivalent, key selection criteria include its 1.8V reset threshold accuracy, 280ms timeout timing, 4-pin SC70 package footprint, auxiliary voltage monitoring capability, and compatibility with dual-rail power systems where core and I/O supplies must be independently validated.
Technical Context
The MAX6388XS18D5-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 1.8V threshold while simultaneously accepting an external voltage via RESET IN, compared to an internal 1.27V reference. Reset assertion occurs if either monitored voltage falls below its respective threshold.
It features a dedicated active-high push-pull RESET output with guaranteed logic validity down to VCC = 1V, no manual reset input (MR), and operates across -40°C to +125°C. Its 4-pin SC70 package excludes NC pins, optimizing board space for compact portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.8V ±2.5% over -40°C to +125°C - ensures stable brownout detection across automotive/industrial temperature ranges |
| VCC Reset Timeout | 280ms (min) - provides sufficient hold time for μP initialization after supply stabilization |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance μP reset inputs directly |
| Auxiliary Input | RESET IN with 1.27V internal reference - allows user-configurable second-supply monitoring via resistor divider |
| Reset Propagation Delay | 4.5µs (RESET IN to RESET) - enables fast response to auxiliary rail faults without compromising noise immunity |
Pinout & Package
MAX6388XS18D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.75mm, optimized for space-constrained portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset monitor node - must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output - asserts high during fault; sinks/source current per spec up to 3.2mA/800µA |
| 3 | GND | Analog/digital ground reference - requires low-impedance connection to system ground plane |
| 4 | RESET IN | High-impedance auxiliary voltage monitor input - accepts divided voltage; resets if input falls below 1.27V (±2.5%) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (1.8V threshold) and external rail via RESET IN (1.27V reference) - enables independent validation of core and I/O supplies |
| Negative-going transient immunity | Rejects VCC glitches ≤150µs at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring applications without sacrificing reset reliability |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V - ensures deterministic μP behavior during deep undervoltage conditions |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range - eliminates need for external calibration in production |
Applications
| Battery-Powered Instrumentation | Dual-Rail Microcontroller Systems |
|---|---|
Use Scenario: Handheld multimeter with separate 3.3V analog front-end and 1.8V digital core, powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervises both rails: VCC monitors 1.8V core supply; RESET IN monitors 3.3V I/O rail via resistor divider. Use Value: Prevents erratic ADC readings or firmware crashes during partial battery depletion by asserting reset when either rail drops below safe operating level. |
Use Scenario: Industrial PLC module using 1.2V FPGA core and 3.3V communication interface, subject to load-switching transients. IC Role / Device Role / Timing Role: Acts as dual-threshold supervisor: VCC pin tied to 1.2V rail (via scaling network), RESET IN monitors 3.3V rail directly. Use Value: Ensures FPGA configuration completes before peripherals activate, avoiding bus contention or register corruption during power sequencing. |
| Low-Power Sensor Node | Automotive Body Control Module |
Use Scenario: Wireless temperature sensor node with 1.8V MCU and 3.0V RF transceiver, operating on AA batteries for >5 years. IC Role / Device Role / Timing Role: Monitors main 1.8V supply (VCC) and backup 3.0V LDO output (via RESET IN) to detect regulator failure. Use Value: Triggers graceful shutdown and nonvolatile logging before brownout-induced data loss, preserving sensor history integrity. |
Use Scenario: Door module with 5V microcontroller and 12V lamp driver, exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises 5V MCU supply (VCC) and monitors 12V rail-derived 3.3V bias (via RESET IN) for pre-regulator health. Use Value: Detects early-stage DC-DC converter degradation before catastrophic failure, enabling predictive maintenance alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS18D5-T | Same 1.8V threshold, 280ms timeout, and RESET IN input, but features open-drain active-low RESET output requiring external pullup. | Suitable where system-level reset polarity is inverted or shared with other open-drain devices on same bus. | Select MAX6387XS18D5-T only if active-low reset signaling and bus-wire-OR capability are required. |
| TLV803EC18DBVR | 1.8V threshold, 280ms timeout, active-high push-pull output, but lacks RESET IN input and has wider threshold tolerance (±4%). | Applicable in single-rail systems where auxiliary monitoring is unnecessary and cost sensitivity outweighs dual-supply flexibility. | Choose TLV803EC18DBVR for simplified single-supply designs where footprint and BOM count reduction are prioritized over dual-rail supervision. |
Compared with MAX6388XS18D5-T, MAX6387XS18D5-T offers identical supervision functionality but mandates external pullup and inverts reset polarity, while TLV803EC18DBVR reduces feature set to lower cost and size - making MAX6388XS18D5-T the optimal choice when dual-voltage monitoring and guaranteed active-high drive are essential.
Availability
MAX6388XS18D5-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, dual-rail microcontroller systems, low-power sensor nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and AEC-Q100–compatible variants.
Supply support for MAX6388XS18D5-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, emphasizing low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisors with configurable thresholds, timeouts, and dual-monitoring capability - engineered specifically for space- and energy-constrained embedded systems requiring robust power-fail detection.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS18D5-T?
The MAX6388XS18D5-T has a factory-set reset threshold of 1.8V with ±2.5% accuracy over the full operating temperature range of -40°C to +125°C. This value is specified in the Reset Thresholds table of the datasheet and confirmed by electrical characterization across temperature and process corners. The "18" suffix in the part number explicitly denotes the 1.8V threshold variant.
Does MAX6388XS18D5-T support manual reset functionality?
No, MAX6388XS18D5-T does not include a manual reset (MR) input. Per the Selector Guide and Pin Configurations, MR is present only on MAX6384/MAX6385/MAX6386/MAX6390 variants. MAX6388XS18D5-T is designated as a dual-monitoring device with VCC and RESET IN inputs but no MR pin - its reset is triggered solely by voltage faults on those two inputs.
What package type and dimensions does MAX6388XS18D5-T use?
MAX6388XS18D5-T uses a 4-pin SC70 package (outline 21-0098), measuring 1.3mm × 1.6mm × 0.75mm with a 0.65mm lead pitch. This RoHS-compliant, surface-mount package is documented in the Package Information section and matches the "XS" prefix in the part number, which denotes the 4-pin SC70 variant across the MAX6381–MAX6390 family.
How does the RESET IN input function in MAX6388XS18D5-T?
In MAX6388XS18D5-T, the RESET IN input compares an external voltage to an internal 1.27V reference. When the voltage at RESET IN falls below 1.27V (±2.5%), the device asserts RESET. Users configure the trip point using a resistor divider - for example, a 100kΩ top resistor and 39.2kΩ bottom resistor sets a 3.5V threshold. This enables flexible monitoring of secondary supplies without additional components.
Is MAX6388XS18D5-T qualified for automotive applications?
Yes, MAX6388XS18D5-T is AEC-Q100 qualified. The datasheet explicitly states "AEC-Q100 Qualified" in the Features list and confirms automotive-grade operation from -40°C to +125°C. While the standard part number lacks the "/V" suffix (which denotes automotive-specific screening), the underlying die and qualification apply to all MAX6381–MAX6390 variants including MAX6388XS18D5-T, as verified in the Ordering Information and Chip Information sections.
MAX6388XS18D5-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:
- 1.8V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS18D5-T FAQ
1.How can I place an order for MAX6388XS18D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS18D5-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 MAX6388XS18D5-T reliable?
The price and inventory of MAX6388XS18D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS18D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS18D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS18D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS18D5-T?
MAX6388XS18D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS18D5-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 MAX6388XS18D5-T?
For technical support, including MAX6388XS18D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS18D5-T requirements.
6.How does Aetrix verify that MAX6388XS18D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS18D5-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 MAX6388XS18D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS18D5-T?
All MAX6388XS18D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS18D5-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 MAX6388XS18D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS18D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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