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Analog Devices Inc./Maxim Integrated MAX6388XS46D3+
- Part No.:
- MAX6388XS46D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS46D3+.pdf
- Description:
- MAX6388 SC70, SINGLE LOW-VOLTAGE
- Quantity:
- Payment:
- Shipping:
Inventory:822
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Product details
Overview
MAX6388XS46D3+ from Maxim Integrated is a low-power, single-supply microprocessor supervisory circuit with active-high push-pull reset output, factory-set 4.63V reset threshold (±2.5% over –40°C to +125°C), 140ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring in portable battery-powered systems.
For engineers reviewing the MAX6388XS46D3+ datasheet, MAX6388XS46D3+ pinout, MAX6388XS46D3+ application, or MAX6388XS46D3+ equivalent, this page delivers verified electrical parameters, SC70-4 package mapping, dual-monitoring capability, and direct alternatives for brownout protection in embedded controllers and intelligent instruments.
Technical Context
The MAX6388XS46D3+ integrates a precision voltage comparator referenced to an internal 1.27V bandgap, monitoring both VCC and an external RESET IN node via resistor-divider configuration. Its reset assertion logic guarantees valid output down to VCC = 1V and provides immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
It features a dedicated auxiliary reset comparator with 4.5µs propagation delay from RESET IN fall to RESET assertion, ±50nA input leakage, and supports user-defined secondary threshold setting using R1/R2 networks - enabling independent monitoring of core and I/O supply rails in dual-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (nominal), ±2.5% tolerance over –40°C to +125°C - ensures reliable brownout detection across industrial temperature range |
| Reset Timeout | 140ms (minimum) - holds µP in reset long enough for stable power-up of 3.3V/5V logic and memory subsystems |
| Supply Current | 3µA at +1.8V, 6µA at +3.6V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up resistor and reduces BOM count |
| Auxiliary Input | RESET IN with 1.27V internal reference - allows precise secondary voltage monitoring (e.g., VCORE or I/O rail) via external resistor divider |
| Operating Voltage | 1.0V to 5.5V - supports operation during deep brownout and ensures reset validity down to near-dead-battery conditions |
| Tempco | 60ppm/°C - maintains threshold stability across wide ambient and junction temperature swings |
Pinout & Package
MAX6388XS46D3+ is housed in a lead-free 4-pin SC70 package (X4-1, 1.0mm × 1.3mm × 0.6mm), optimized for space-constrained portable designs. Pin 1 = VCC, Pin 2 = RESET (active-high push-pull), Pin 3 = RESET IN, Pin 4 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers internal circuitry and sets fixed reset threshold |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; no external pull-up required |
| 3 | RESET IN | Auxiliary voltage monitor input - compared against 1.27V internal reference for secondary rail supervision |
| 4 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold tracking |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN - enables robust power sequencing in SoC-based systems with split-core/I/O supplies |
| Factory-trimmed threshold | 4.63V ±2.5% over full temperature range - eliminates calibration overhead and improves yield in high-volume manufacturing |
| Low-power operation | 3µA supply current at 1.8V - extends battery life in always-on edge nodes without compromising supervision integrity |
| Negative transient immunity | Withstands VCC glitches ≤35µs at 100mV overdrive - prevents spurious resets in noisy automotive or industrial environments |
| Valid reset down to 1V | Guaranteed correct logic state at VCC ≥1V - ensures deterministic behavior during deep undervoltage recovery |
Applications
| Battery-Powered Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 2.0–3.0V operating range and strict low-power requirements. IC Role / Device Role / Timing Role: Supervises main supply and analog front-end rail; asserts active-high RESET for MCU initialization on power-up and brownout. Use Value: 3µA quiescent current extends sensor runtime beyond 2 years; 140ms timeout ensures ADC and RF transceiver stabilize before firmware execution. | Use Scenario: DIN-rail mounted I/O module with separate 5V logic and 24V field-side supplies requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Monitors 5V VCC and 24V-derived 3.3V I/O rail via RESET IN divider; triggers unified reset event when either drops below threshold. Use Value: Dual-input architecture eliminates need for two discrete supervisors, reducing PCB area and component count while ensuring synchronized system restart. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: Revenue-grade electricity meter with backup supercapacitor and isolated RS-485 interface operating across –25°C to +70°C. IC Role / Device Role / Timing Role: Provides VCC brownout detection and RESET IN supervision of isolated power domain; guarantees clean boot after capacitor discharge events. Use Value: ±2.5% threshold accuracy and 60ppm/°C tempco maintain timing integrity across temperature extremes without recalibration. | Use Scenario: BCM controlling door locks, lighting, and window motors with 12V battery input subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Detects VCC dips during cranking and monitors 5V regulator output via RESET IN; asserts reset only on sustained undervoltage, not short glitches. Use Value: 35µs glitch rejection prevents false resets during engine start, improving system reliability and user experience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT46D3+ | Same electrical specs but in 6-pin µDFN-6 (L611-1) package - 1.5mm × 1.0mm footprint, better thermal performance | Preferred for thermally demanding industrial PCBs where SC70-4 thermal resistance is marginal | Select MAX6388LT46D3+ when board layout allows larger package and higher power dissipation margin is needed. |
| TPS3808G33DBVR | 3.3V fixed threshold (not adjustable), 200ms timeout, 1.6µA ICC at 3.3V - lower current but no auxiliary input | Suitable for single-rail 3.3V systems without secondary voltage monitoring requirement | Choose TPS3808G33DBVR only if dual-supply supervision is unnecessary and ultra-low ICC (<2µA) is critical. |
Compared with MAX6388LT46D3+, the MAX6388XS46D3+ saves 0.5mm² board area and suits ultra-compact designs; versus TPS3808G33DBVR, it offers flexible 4.63V threshold and dual-rail capability at the cost of slightly higher supply current - making it optimal for space-constrained dual-voltage applications.
Availability
MAX6388XS46D3+ is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply and guaranteed long-term manufacturability.
Supply support for MAX6388XS46D3+ 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, communications, and computing markets, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family was engineered specifically for microprocessor reset supervision in space- and power-constrained embedded systems, delivering factory-trimmed thresholds, dual-rail monitoring, and ultra-low ICC in miniature SC70 and µDFN packages.
FAQ
What is the exact reset threshold voltage of MAX6388XS46D3+ and how tightly is it specified?
The MAX6388XS46D3+ has a nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full industrial temperature range (–40°C to +125°C). This specification is factory-trimmed and tested, not derived from typical values - ensuring consistent brownout detection across all units and operating conditions without calibration.
Does MAX6388XS46D3+ support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6388XS46D3+ supports dual-voltage supervision via its RESET IN pin, which connects to an internal 1.27V comparator. To monitor a second rail (e.g., 3.3V or 2.5V), apply the target voltage through a resistor divider network to RESET IN so that the divided voltage equals 1.27V at the desired trip point - enabling independent supervision of core and I/O supplies.
What is the function of the RESET output on MAX6388XS46D3+, and does it require an external pull-up resistor?
The RESET output of MAX6388XS46D3+ is an active-high push-pull driver, meaning it actively drives high during reset assertion and low when deasserted. Because it is push-pull, no external pull-up resistor is required - simplifying design, reducing component count, and eliminating potential weak-state issues common with open-drain configurations.
What is the minimum supply voltage at which MAX6388XS46D3+ guarantees valid reset output behavior?
MAX6388XS46D3+ guarantees correct RESET output logic state for VCC ≥ 1.0V. Below this level, the internal circuitry may not operate reliably; however, the device remains functional down to VCC = 1.0V, ensuring deterministic reset assertion during deep brownout recovery - a key requirement for battery-backed systems approaching end-of-life voltage.
How does MAX6388XS46D3+ handle short-duration voltage transients on the VCC line?
MAX6388XS46D3+ provides built-in immunity to negative-going VCC transients: it will not assert reset for glitches shorter than 35µs when the overdrive (VTH – VCC) is 100mV. This is achieved through internal filtering and comparator hysteresis, preventing spurious resets in electrically noisy environments such as automotive or industrial motor-control applications.
MAX6388XS46D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.63V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS46D3+ FAQ
1.How can I place an order for MAX6388XS46D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS46D3+ 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 MAX6388XS46D3+ reliable?
The price and inventory of MAX6388XS46D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS46D3+ is usually 5 days.
3.What payment methods are accepted for MAX6388XS46D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS46D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS46D3+?
MAX6388XS46D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS46D3+ 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 MAX6388XS46D3+?
For technical support, including MAX6388XS46D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS46D3+ requirements.
6.How does Aetrix verify that MAX6388XS46D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6388XS46D3+ 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 MAX6388XS46D3+ meets industry standards.
7.What is the process for return or replacement of MAX6388XS46D3+?
All MAX6388XS46D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS46D3+, 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 MAX6388XS46D3+ part is unused and in its original packaging.
Return procedure for MAX6388XS46D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS46D3+ Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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