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Analog Devices Inc./Maxim Integrated MAX6388XS19D5-T
- Part No.:
- MAX6388XS19D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS19D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,667
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Product details
Overview
MAX6388XS19D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.9V 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 operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, enabling reliable power-up/brownout detection in space-constrained battery-powered systems.
For engineers reviewing the MAX6388XS19D5-T datasheet, MAX6388XS19D5-T pinout, MAX6388XS19D5-T application, or MAX6388XS19D5-T equivalent, key selection criteria include its 1.9V fixed reset threshold, 280ms timeout, 4-pin SC70 package, auxiliary voltage monitoring capability, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS19D5-T integrates a precision bandgap reference and comparator to monitor VCC against a factory-trimmed 1.9V threshold, asserting reset when VCC falls below that level. Its internal timer enforces a minimum 280ms reset pulse width after VCC recovers above threshold.
A dedicated high-impedance RESET IN input compares external voltage to an internal 1.27V reference, enabling user-configurable secondary voltage supervision via resistor divider. The active-high push-pull RESET output drives directly without external pullup and remains valid down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.90V ±2.5% (–40°C to +125°C); ensures accurate brownout detection across automotive/industrial temperature range |
| VCC Reset Timeout | 280ms min; guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V; supports single-supply operation down to ultra-low-voltage logic domains |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor and reduces BOM count |
| Auxiliary Input | RESET IN pin with 1.27V internal reference; allows monitoring of second rail (e.g., I/O voltage) using external resistor divider |
| Reset Validity Range | Guaranteed correct logic state down to VCC = 1V; prevents spurious resets during deep brownout |
Pinout & Package
MAX6388XS19D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor; powers internal circuitry and sets reset threshold reference point |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low after timeout completes |
| 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 internal 1.27V reference to enable dual-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.9V reset threshold | Eliminates external resistor network and calibration effort while maintaining ±2.5% accuracy over full industrial temperature range |
| 280ms minimum reset timeout | Ensures adequate μP initialization window for complex boot sequences in embedded controllers |
| RESET IN auxiliary monitor input | Enables independent supervision of secondary supply (e.g., core vs. I/O voltage) without adding discrete comparators |
| Active-high push-pull RESET output | Directly interfaces with μP reset inputs requiring active-high assertion, reducing component count and layout complexity |
| 1.0V to 5.5V operating range | Supports legacy 5V, modern 3.3V/2.5V, and emerging 1.8V/1.2V logic families in single device |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: Long-life wireless sensor node powered by CR2032 coin cell, requiring reliable power-on reset and brownout protection during intermittent RF transmission. IC Role / Device Role / Timing Role: Supervises main 3.0V supply and monitors backup 1.8V RTC rail via RESET IN to prevent firmware corruption during voltage sag. Use Value: 3μA quiescent current extends battery life beyond 5 years; 280ms timeout accommodates slow LDO startup; 1.9V threshold matches Li-ion discharge profile. | Use Scenario: Modular I/O card in programmable logic controller with separate 5V logic and 24V field-side supplies. IC Role / Device Role / Timing Role: Monitors 5V logic rail with 1.9V threshold and uses RESET IN to supervise isolated 3.3V auxiliary supply derived from 24V bus. Use Value: Dual-rail supervision prevents partial initialization; push-pull output drives multiple μP reset inputs without fanout limitations; AEC-Q100–qualified variant available for harsh environments. |
| Medical Wearable ECG Monitor | Automotive Body Control Module (BCM) |
Use Scenario: Ultra-low-power wearable ECG device using 1.8V MCU and analog front-end, where supply transients from motion-induced battery contact loss must trigger clean reset. IC Role / Device Role / Timing Role: Primary VCC supervisor with 1.9V threshold aligned to MCU VDDMIN, plus RESET IN monitoring 2.8V analog supply to ensure signal chain integrity. Use Value: Negative-going transient immunity prevents false resets; 280ms timeout exceeds ADC calibration duration; SC70 footprint saves critical board area. | Use Scenario: BCM subassembly requiring robust reset behavior across wide temperature (-40°C to +125°C) and load-dump conditions. IC Role / Device Role / Timing Role: Supervises 5V domain and uses RESET IN to monitor 3.3V CAN transceiver supply, ensuring coordinated reset of communication peripherals. Use Value: ±2.5% threshold accuracy over full automotive temp range eliminates margining overhead; guaranteed operation down to VCC = 1V prevents latch-up during cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388XS26D5-T | 2.63V reset threshold (vs. 1.90V); same 280ms timeout, 4-pin SC70, RESET IN, active-high push-pull | Suitable for 2.5V/3.3V systems where higher threshold avoids nuisance resets during nominal ripple | Select when supervising rails ≥2.5V; retains identical timing, package, and auxiliary monitoring capability |
| TLV809K29DBZR | 2.93V fixed threshold, 200ms timeout, SOT-23-3, no RESET IN, active-low open-drain output | Limited to single-rail supervision; requires external pullup; lower integration than MAX6388XS19D5-T | Choose for cost-sensitive, single-supply designs where auxiliary monitoring is unnecessary and active-low reset is acceptable |
Compared with MAX6388XS26D5-T and TLV809K29DBZR, the MAX6388XS19D5-T uniquely combines 1.9V threshold precision, dual-rail monitoring, and active-high push-pull drive in a 4-pin SC70-enabling compact, low-power designs requiring tight brownout control on sub-2V supplies.
Availability
MAX6388XS19D5-T is available at Aetrix Electronics and suitable for battery-powered IoT sensors, medical wearables, industrial PLC modules, and automotive body control units requiring stable component supply with long-term lifecycle support.
Supply support for MAX6388XS19D5-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy μP supervisory circuits with configurable thresholds, timeouts, and dual-rail monitoring-targeting space- and power-constrained embedded systems requiring robust power sequencing and fault detection.
FAQ
What is the exact reset threshold voltage of the MAX6388XS19D5-T and how stable is it over temperature?
The MAX6388XS19D5-T has a factory-set reset threshold of 1.90V with ±2.5% accuracy over the full –40°C to +125°C operating range. This stability is achieved through laser-trimmed internal resistors and a precision bandgap reference, ensuring reliable brownout detection without external calibration. The MAX6388XS19D5-T maintains this specification across all production lots and temperature extremes.
Does the MAX6388XS19D5-T support monitoring of a second voltage rail, and if so, how is it implemented?
Yes, the MAX6388XS19D5-T includes a dedicated RESET IN pin that compares an external voltage to an internal 1.27V reference. To monitor a second rail, connect a resistor divider between that rail and ground, with the midpoint fed to RESET IN. The MAX6388XS19D5-T asserts reset if either VCC drops below 1.90V or the voltage at RESET IN falls below 1.27V-enabling true dual-supply supervision in a single 4-pin device.
What is the function of the RESET output on the MAX6388XS19D5-T, and what are its drive capabilities?
The RESET output of the MAX6388XS19D5-T is an active-high push-pull driver. It asserts high during reset (when VCC < 1.90V or RESET IN < 1.27V) and deasserts low after the 280ms timeout. It can sink 1.2mA at 2.5V (VOL ≤ 0.3V) and source 500µA at 2.5V (VOH ≥ 0.8×VCC), eliminating the need for external pullup resistors and supporting direct interface with most microprocessor reset inputs.
How does the MAX6388XS19D5-T behave during severe supply transients, and what design features improve its noise immunity?
The MAX6388XS19D5-T incorporates negative-going VCC transient immunity: it ignores short-duration glitches below the reset threshold, with maximum allowable pulse width decreasing as overdrive increases (per datasheet Figure 7). Adding a 0.1µF ceramic capacitor close to the VCC pin further enhances immunity. The MAX6388XS19D5-T's internal comparator architecture and hysteresis prevent false resets caused by typical power rail noise.
Is the MAX6388XS19D5-T suitable for automotive applications, and what qualification does it hold?
The MAX6388XS19D5-T is available in an AEC-Q100 qualified version denoted by the "/V" suffix (e.g., MAX6388XS19D5/V+T). While the base MAX6388XS19D5-T is rated for –40°C to +125°C operation and meets industrial reliability standards, the /V variant undergoes additional stress testing per AEC-Q100 Rev G for automotive under-hood and cabin applications. Always verify the specific orderable part number includes "/V" for automotive use.
MAX6388XS19D5-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:
- 1.9V, 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
MAX6388XS19D5-T FAQ
1.How can I place an order for MAX6388XS19D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS19D5-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 MAX6388XS19D5-T reliable?
The price and inventory of MAX6388XS19D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS19D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS19D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS19D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS19D5-T?
MAX6388XS19D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS19D5-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 MAX6388XS19D5-T?
For technical support, including MAX6388XS19D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS19D5-T requirements.
6.How does Aetrix verify that MAX6388XS19D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS19D5-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 MAX6388XS19D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS19D5-T?
All MAX6388XS19D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS19D5-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 MAX6388XS19D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS19D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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