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Analog Devices Inc./Maxim Integrated MAX6388XS19D2-T
- Part No.:
- MAX6388XS19D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS19D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,859
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Product details
Overview
MAX6388XS19D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.90V ±2.5% VCC reset threshold, and 20ms minimum reset timeout period. It monitors single supply voltage in battery-powered or low-voltage embedded systems and guarantees valid reset state down to VCC = 1.0V. Designed for dual-voltage monitoring applications, it includes auxiliary RESET IN input for secondary voltage supervision.
For engineers reviewing the MAX6388XS19D2-T datasheet, MAX6388XS19D2-T pinout, MAX6388XS19D2-T application, or MAX6388XS19D2-T equivalent, key selection criteria include its 1.90V reset threshold accuracy over –40°C to +125°C, 4-pin SC70 package footprint, 3μA supply current at 1.8V, auxiliary voltage monitor capability, and compatibility with manual-reset–equipped systems requiring precise timing control.
Technical Context
The MAX6388XS19D2-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 20ms minimum reset assertion period after VCC rises above 1.90V or after RESET IN falls below 1.27V.
This device integrates an auxiliary high-impedance RESET IN input referenced to an internal 1.27V comparator, enabling user-configurable secondary voltage monitoring via external resistor divider. The active-high push-pull RESET output drives logic-high during reset and guarantees correct logic state down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.90V (nominal), ±2.5% over –40°C to +125°C - ensures reliable brownout detection for 1.8V-core systems |
| Reset Timeout Period | 20ms (min) - provides sufficient hold time for μP initialization after power recovery |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP RESET pin |
| Auxiliary Input | RESET IN with 1.27V internal reference - allows monitoring of second rail (e.g., I/O voltage) using external resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| Reset Propagation Delay | 35µs (VCC falling) - fast response to supply transients without false triggering |
Pinout & Package
MAX6388XS19D2-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, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node; powers internal circuitry and sets reset threshold reference |
| 2 | RESET | Active-high push-pull output; drives high during reset condition and returns low after timeout completes |
| 3 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 4 | RESET IN | Auxiliary voltage monitor input; compared against internal 1.27V reference to trigger reset if external rail drops below configured threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables robust power sequencing in dual-supply systems |
| Low-voltage operation guarantee | Valid RESET output asserted correctly down to VCC = 1.0V - critical for ultra-low-power wake-up integrity |
| Negative-going transient immunity | Rejects VCC glitches ≤35µs duration when overdrive exceeds 100mV - prevents spurious resets in noisy environments |
| Factory-trimmed precision | ±2.5% reset threshold tolerance over full temperature range eliminates need for external calibration components |
| Ultra-low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on sensor nodes with 200mAh coin cell |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 5 minutes via BLE. IC Role / Device Role / Timing Role: Supervises 1.8V core rail and 3.3V I/O rail; asserts reset on brownout to prevent corrupted BLE stack initialization. Use Value: 20ms timeout ensures full μP register initialization before firmware execution; 1.90V threshold aligns precisely with 1.8V LDO dropout margin. |
Use Scenario: Handheld ECG device with rechargeable Li-ion battery and dual-domain power management. IC Role / Device Role / Timing Role: Monitors both core (1.8V) and analog front-end (3.3V) supplies; uses RESET IN to supervise ADC reference voltage rail. Use Value: Auxiliary input enables independent fault detection on analog domain without adding discrete comparators; push-pull output drives μP RESET directly without pullup. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Low-power CAN node in door module operating from 5V vehicle bus with local 3.3V regulator. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V microcontroller supply; RESET IN monitors 5V input to detect main bus failure before regulator dropout. Use Value: Dual-monitoring capability replaces two discrete supervisors, reducing BOM count and PCB area by 30%. |
Use Scenario: Tamper-resistant electricity meter with real-time clock and secure bootloader requiring guaranteed power-fail reset. IC Role / Device Role / Timing Role: Ensures deterministic reset during AC line sag or capacitor discharge; 1.90V threshold matches supercap backup voltage profile. Use Value: 3μA supply current extends supercap hold-up time by >15% versus higher-current alternatives, improving tamper-resistance window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS19D2-T | Same 1.90V threshold and 20ms timeout, but features open-drain active-low RESET output | Requires external pullup resistor; incompatible with μP inputs expecting active-high reset signal | Select only if system design already uses active-low reset architecture and pullup is available |
| TLV803EB19DBZR | 1.93V threshold, 240ms min timeout, SOT-23-3 package, no auxiliary input | Lacks RESET IN functionality; unsuitable for dual-rail monitoring; longer timeout may delay system recovery | Choose only for single-rail, cost-sensitive applications where auxiliary monitoring is unnecessary |
Compared with MAX6387XS19D2-T, MAX6388XS19D2-T eliminates external pullup requirements and simplifies layout; versus TLV803EB19DBZR, it enables dual-supply fault detection and offers tighter timing control for fast-recovery systems.
Availability
MAX6388XS19D2-T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, automotive body control modules, smart energy meters, and dual-voltage embedded systems requiring stable component supply throughout product lifecycles.
Supply support for MAX6388XS19D2-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 reset supervision for battery-operated and safety-critical embedded systems, with variants supporting single/dual-rail monitoring, multiple reset polarities, and automotive qualification.
FAQ
What is the exact reset threshold voltage of MAX6388XS19D2-T and how accurate is it over temperature?
The MAX6388XS19D2-T has a factory-set nominal reset threshold of 1.90V, 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, and the 60ppm/°C tempco ensures minimal drift across thermal gradients encountered in automotive and industrial environments. The MAX6388XS19D2-T maintains this precision without external calibration.
Does MAX6388XS19D2-T support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6388XS19D2-T supports secondary voltage monitoring via its dedicated RESET IN pin, which connects to an internal 1.27V comparator. To configure a custom threshold, an external resistor divider is applied to RESET IN using the formula R1 = R2 × [(VINTH/1.27V) – 1]. The MAX6388XS19D2-T asserts reset if either VCC falls below 1.90V or the voltage at RESET IN drops below the derived threshold, enabling true dual-rail supervision in compact designs.
What is the supply current consumption of MAX6388XS19D2-T at different VCC levels?
The MAX6388XS19D2-T draws 3μA typical supply current at VCC = 1.8V, 4μA at 2.5V, 6μA at 3.6V, and 7μA at 5.5V - all measured under no-load conditions. These values are specified in the Electrical Characteristics table and reflect its optimized BiCMOS process. The ultra-low 3μA draw at 1.8V makes the MAX6388XS19D2-T ideal for multi-year battery operation in always-on edge devices.
Can MAX6388XS19D2-T operate reliably during deep brownout conditions?
Yes, MAX6388XS19D2-T guarantees correct RESET output logic state down to VCC = 1.0V, as explicitly stated in the Absolute Maximum Ratings and Detailed Description sections. Unlike many reset ICs that fail or float below 1.5V, the MAX6388XS19D2-T continues asserting reset until VCC recovers past 1.90V and holds for the full 20ms timeout - ensuring deterministic behavior even during severe undervoltage events.
What package type and pin configuration does MAX6388XS19D2-T use?
MAX6388XS19D2-T is supplied in a 4-pin SC70 package (outline 21-0098) with pin 1 = VCC, pin 2 = RESET (active-high push-pull), pin 3 = GND, and pin 4 = RESET IN. This compact 2.0mm × 2.1mm footprint is RoHS-compliant (+T suffix) and validated for reflow soldering up to +260°C. The pinout is confirmed in the Pin Configurations section of the datasheet and matches the MAX6384–MAX6390 4-pin SC70 variant group.
MAX6388XS19D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS19D2-T FAQ
1.How can I place an order for MAX6388XS19D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS19D2-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 MAX6388XS19D2-T reliable?
The price and inventory of MAX6388XS19D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS19D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS19D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS19D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS19D2-T?
MAX6388XS19D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS19D2-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 MAX6388XS19D2-T?
For technical support, including MAX6388XS19D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS19D2-T requirements.
6.How does Aetrix verify that MAX6388XS19D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS19D2-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 MAX6388XS19D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS19D2-T?
All MAX6388XS19D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS19D2-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 MAX6388XS19D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS19D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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