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Analog Devices Inc./Maxim Integrated MAX6388XS28D5-T
- Part No.:
- MAX6388XS28D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS28D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,702
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Product details
Overview
MAX6388XS28D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.80V VCC reset threshold (±2.5% over -40°C to +125°C), 280ms minimum 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 controllers and intelligent instrumentation requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6388XS28D5-T datasheet, MAX6388XS28D5-T pinout, MAX6388XS28D5-T application, or MAX6388XS28D5-T equivalent, key selection criteria include its 2.80V threshold accuracy, 280ms timeout, 4-pin SC70 package, RESET IN capability for secondary voltage monitoring, and compatibility with dual-rail systems where core and I/O supplies require independent supervision.
Technical Context
The MAX6388XS28D5-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.80V threshold, while its auxiliary RESET IN pin compares an external voltage to an internal 1.27V reference-enabling user-defined second-supply monitoring via resistor divider. Reset assertion is latched and held for exactly 280ms after VCC or RESET IN recovers above their respective thresholds.
It features an active-high push-pull RESET output that drives high during fault conditions and returns low after timeout, eliminating need for external pullup. The device includes negative-going VCC transient immunity up to 35µs at 100mV overdrive and operates across -40°C to +125°C with guaranteed functionality down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.80V ±2.5% (–40°C to +125°C); ensures reliable detection of 2.8V supply brownout |
| Reset Timeout Period | 280ms minimum; provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered portable devices |
| RESET Output Type | Active-high push-pull; eliminates external pullup and supports direct connection to μP reset input |
| Auxiliary Input | RESET IN pin referenced to 1.27V; allows monitoring of second supply (e.g., VCORE) via resistor divider |
| Operating Voltage Range | +1.0V to +5.5V; supports valid reset assertion even during deep brownout recovery |
| Temperature Range | –40°C to +125°C; qualified for industrial and automotive under-hood applications |
Pinout & Package
MAX6388XS28D5-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 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; drives high during reset condition and low otherwise; no external pullup required |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for stable threshold accuracy |
| 4 | RESET IN | Auxiliary voltage monitor input; compared to internal 1.27V reference; enables dual-supply supervision without additional IC |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous supervision of VCC and secondary supply via RESET IN pin and 1.27V internal reference |
| Precision reset threshold | 2.80V ±2.5% over full temperature range ensures consistent brownout detection across environments |
| Low quiescent current | 3μA at 1.8V extends battery life in always-on portable instrumentation and remote sensors |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1V, preventing undefined states during deep undervoltage |
| Negative transient immunity | Rejects VCC glitches ≤35µs wide at 100mV overdrive, reducing false resets in noisy power systems |
Applications
| Battery-Powered Controllers | Industrial Sensor Nodes |
|---|---|
Use Scenario: A programmable logic controller (PLC) module powered by a Li-ion cell experiences gradual discharge and intermittent load spikes causing VCC dips. IC Role / Device Role / Timing Role: MAX6388XS28D5-T monitors main 3.3V rail and secondary 1.8V core supply, asserting active-high RESET until both stabilize for ≥280ms. Use Value: Prevents firmware corruption during brownout by holding μP in reset until both rails meet timing and voltage criteria. | Use Scenario: A wireless environmental sensor node uses separate 3.3V I/O and 1.2V analog front-end supplies, requiring coordinated reset on either rail failure. IC Role / Device Role / Timing Role: MAX6388XS28D5-T supervises VCC (3.3V) and RESET IN (divided 1.2V rail), triggering unified reset if either drops below threshold. Use Value: Eliminates need for two discrete supervisors, saving board area and BOM cost while ensuring deterministic startup sequence. |
| Automotive Body Control Modules | Medical Diagnostic Handhelds |
Use Scenario: Under-hood body control unit endures wide temperature swings and load dump transients on 5V supply. IC Role / Device Role / Timing Role: MAX6388XS28D5-T provides AEC-Q100–qualified supervision with 280ms timeout and 35µs glitch rejection on VCC. Use Value: Meets automotive reset timing requirements while rejecting engine cranking noise without external filtering. | Use Scenario: Portable ultrasound device powered by rechargeable battery must maintain safe shutdown and restart behavior during voltage sag. IC Role / Device Role / Timing Role: MAX6388XS28D5-T monitors main 3.3V supply and backup 1.8V real-time clock rail, asserting RESET until both recover. Use Value: Ensures diagnostic data integrity by preventing partial execution during marginal power conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT28D5-T | Same electrical specs but in 6-pin µDFN package; higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for thermally demanding layouts where µDFN soldering is established; less suitable for ultra-dense SC70 designs | Select when board assembly process favors µDFN or when GND pad thermal relief is needed |
| TLV809M28DBZR | 2.8V threshold, 280ms timeout, but no RESET IN pin; open-drain active-low output; 3-pin SOT-23 package | Lacks dual-supply monitoring; requires external pullup; not suitable for applications needing auxiliary voltage supervision | Choose only for single-rail systems where footprint and cost outweigh dual-monitoring requirement |
Compared with MAX6388XS28D5-T, the LT28D5-T variant offers identical supervision performance in a larger µDFN package with different thermal characteristics, while TLV809M28DBZR provides basic single-rail reset at lower cost but omits the critical RESET IN function required for dual-voltage coordination.
Availability
MAX6388XS28D5-T is available at Aetrix Electronics and suitable for battery-powered controllers, industrial sensor nodes, automotive body control modules, and medical handheld devices requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS28D5-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 industrial, automotive, and computing applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for space-constrained, battery-sensitive systems requiring accurate brownout detection and dual-rail supervision.
FAQ
What is the exact reset threshold voltage of the MAX6388XS28D5-T?
The MAX6388XS28D5-T has a factory-set VCC reset threshold of 2.80V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet and applies specifically to the "28" suffix in the part number. The MAX6388XS28D5-T uses this threshold to detect brownout conditions on the main supply rail.
Does the MAX6388XS28D5-T support monitoring of a second voltage supply?
Yes, the MAX6388XS28D5-T includes a dedicated RESET IN pin that compares an external voltage to an internal 1.27V reference. By connecting a resistor divider to RESET IN, users can configure supervision of a second supply (e.g., VCORE or analog rail). This feature is explicitly documented for MAX6387/MAX6388/MAX6389 variants and is functional in the MAX6388XS28D5-T.
What is the reset output configuration of the MAX6388XS28D5-T?
The MAX6388XS28D5-T features an active-high push-pull RESET output, meaning it drives high during reset assertion and low otherwise. This eliminates the need for an external pullup resistor and allows direct interfacing with microprocessors expecting active-high reset signals. The output is guaranteed valid down to VCC = 1V, as specified in the Electrical Characteristics table.
What package type and dimensions does the MAX6388XS28D5-T use?
The MAX6388XS28D5-T is packaged in a 4-pin SC70 (SOT-323) outline with package code X4+1, outline number 21-0098, and land pattern 90-0187. Its dimensions are 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is optimized for high-density PCB layouts and reflow-compatible assembly.
How does the MAX6388XS28D5-T handle short VCC transients?
The MAX6388XS28D5-T provides built-in immunity to negative-going VCC transients, rejecting glitches up to 35µs wide when the overdrive (VTH – VCC) is 100mV. This is measured per the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph in the datasheet. The device maintains correct reset behavior without false triggering during typical power rail noise events.
MAX6388XS28D5-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:
- 2.8V, 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
MAX6388XS28D5-T FAQ
1.How can I place an order for MAX6388XS28D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS28D5-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 MAX6388XS28D5-T reliable?
The price and inventory of MAX6388XS28D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS28D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS28D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS28D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS28D5-T?
MAX6388XS28D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS28D5-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 MAX6388XS28D5-T?
For technical support, including MAX6388XS28D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS28D5-T requirements.
6.How does Aetrix verify that MAX6388XS28D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS28D5-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 MAX6388XS28D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS28D5-T?
All MAX6388XS28D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS28D5-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 MAX6388XS28D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS28D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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