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Analog Devices Inc./Maxim Integrated MAX6388XS23D7-T
- Part No.:
- MAX6388XS23D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS23D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,511
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Product details
Overview
MAX6388XS23D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.31V VCC reset threshold (±2.5% over -40°C to +125°C), 1200ms 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, targeting battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6388XS23D7-T datasheet, MAX6388XS23D7-T pinout, MAX6388XS23D7-T application, or MAX6388XS23D7-T equivalent, key selection criteria include its 2.31V reset threshold accuracy, 1200ms timeout guarantee, 4-pin SC70 package footprint, and dual-monitoring capability via RESET IN - critical for multi-rail SoC power sequencing in portable instrumentation and industrial controllers.
Technical Context
The MAX6388XS23D7-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.31V threshold, asserting RESET when VCC drops below that level. Its internal timer guarantees a minimum 1200ms reset assertion after VCC recovers above threshold.
A dedicated high-impedance RESET IN input compares external voltage to an internal 1.27V reference, enabling user-defined secondary reset detection via resistor divider. The active-high push-pull RESET output drives logic-high during reset and is guaranteed valid down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V ±2.5% over -40°C to +125°C - ensures stable brownout detection across automotive/industrial temperature range |
| VCC Reset Timeout | 1200ms min - provides sufficient hold time for slow-ramping power supplies or complex boot sequences |
| Supply Current | 3μA at 1.8V - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage | 1.0V to 5.5V - supports wide-range rail monitoring including core and I/O supplies |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup, simplifies interface to μP reset input |
| RESET IN Threshold | 1.27V ±2.5% - allows precise secondary voltage monitoring (e.g., 3.3V or 5V rails) using two-resistor divider |
| Reset Propagation Delay | 4.5µs max (RESET IN to RESET) - ensures fast response to auxiliary rail faults |
Pinout & Package
MAX6388XS23D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and sets reset comparator reference |
| 2 | RESET | Active-high push-pull output; drives high during reset condition and remains asserted for full 1200ms timeout |
| 3 | GND | Analog/digital ground reference; must be connected directly to system ground plane for noise immunity |
| 4 | RESET IN | Auxiliary voltage monitor input; accepts divided-down voltage for secondary rail supervision (e.g., 3.3V via R1/R2 divider) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (2.31V) and external rail via RESET IN (1.27V reference) - enables robust power sequencing in multi-supply systems |
| Negative-going transient immunity | Rejects VCC glitches ≤150µs at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Low-VCC reset validity | Guaranteed RESET state integrity down to VCC = 1.0V - ensures deterministic behavior during deep brownout |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range - eliminates need for external calibration |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on sensor nodes and wearables |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meter with dual-rail MCU (1.8V core, 3.3V analog front-end) requiring fail-safe boot sequence. IC Role / Device Role / Timing Role: Supervises both VCC and auxiliary 3.3V rail via RESET IN; asserts active-high RESET for ≥1200ms until both rails stabilize. Use Value: Prevents firmware execution on marginal supplies, eliminating corrupted ADC readings or false alarms during cold-start. | Use Scenario: DIN-rail mounted controller with isolated 24V DC input converted to 5V and 3.3V rails for logic and communication ICs. IC Role / Device Role / Timing Role: Monitors 5V main rail (VCC) and 3.3V logic rail (via RESET IN); triggers reset if either falls below threshold during line transients. Use Value: Ensures deterministic recovery from 24V input dips without watchdog intervention, meeting IEC 61000-4-4 compliance. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: AEC-Q100 qualified module monitoring 5V microcontroller supply and 12V CAN transceiver bias rail. IC Role / Device Role / Timing Role: Uses RESET IN to supervise 12V rail (scaled to 1.27V via divider); asserts RESET if either rail collapses during load-dump events. Use Value: Maintains ECU functional safety integrity per ISO 26262 ASIL-B by preventing undefined MCU states during electrical stress. | Use Scenario: Tamper-resistant meter with backup supercapacitor maintaining RTC and secure memory during AC outage. IC Role / Device Role / Timing Role: Supervises main 3.3V rail (VCC) and supercap voltage (via RESET IN); holds RESET active during capacitor discharge to prevent partial writes. Use Value: Guarantees atomic EEPROM updates during brownout, preserving billing data integrity and regulatory audit trails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT23D7-T | Same electrical specs but in 6-pin µDFN package; no SC70 footprint compatibility | Requires PCB redesign due to different pin count and layout; better thermal performance (θJA = 477°C/W vs. 322.6°C/W) | Select when higher power dissipation margin or board-level thermal management is required |
| TPS3808G33DBVR | 2.93V fixed threshold (not 2.31V); 200ms timeout (not 1200ms); no RESET IN input | Lacks dual-rail monitoring; shorter timeout insufficient for slow-ramp supplies; incompatible threshold for 2.5V systems | Only suitable where 2.93V threshold and single-rail supervision meet design requirements |
Compared with MAX6388LT23D7-T, the MAX6388XS23D7-T offers identical supervision functionality in a smaller 4-pin SC70 footprint ideal for space-constrained designs, while the TPS3808G33DBVR lacks both the precise 2.31V threshold and auxiliary monitoring needed for dual-rail reliability-critical applications.
Availability
MAX6388XS23D7-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS23D7-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.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and multi-rail embedded systems, emphasizing factory-trimmed thresholds, dual-voltage monitoring, and AEC-Q100 qualification.
FAQ
What is the exact reset threshold voltage of the MAX6388XS23D7-T?
The MAX6388XS23D7-T has a factory-set VCC reset threshold of 2.31V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet (suffix "23"), and applies specifically to the MAX6388XS23D7-T - not inferred from adjacent variants.
Does the MAX6388XS23D7-T support manual reset functionality?
No, the MAX6388XS23D7-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. The MAX6388XS23D7-T features RESET IN for auxiliary voltage monitoring but no MR pin - confirmed by its 4-pin SC70 pinout (VCC, RESET, GND, RESET IN).
What is the function of the RESET IN pin on the MAX6388XS23D7-T?
The RESET IN pin on the MAX6388XS23D7-T is a high-impedance input connected to an internal 1.27V comparator reference. When used with an external resistor divider, it enables supervision of a second voltage rail (e.g., 3.3V or 5V). Reset asserts if either VCC falls below 2.31V or the voltage at RESET IN drops below 1.27V - a confirmed dual-monitoring capability unique to MAX6387/MAX6388/MAX6389 variants.
Can the MAX6388XS23D7-T operate reliably at VCC = 1.2V?
Yes, the MAX6388XS23D7-T guarantees correct RESET output logic state down to VCC = 1.0V, as stated in the Electrical Characteristics table. At 1.2V, the device fully functions: reset assertion/deassertion timing, threshold detection, and RESET IN monitoring remain valid - critical for ultra-low-voltage battery systems where supply may dip near cutoff.
Is the MAX6388XS23D7-T pin-compatible with MAX809 or MAX6326?
No, the MAX6388XS23D7-T is not pin-compatible with MAX809 or MAX6326. While the datasheet notes "pin compatible" for the broader MAX6381–MAX6390 family *with each other*, the MAX6388XS23D7-T uses a 4-pin SC70 package (pins: VCC, RESET, GND, RESET IN), whereas MAX809 is a 3-pin SC70 and MAX6326 is a 5-pin SOT23 - differing pin counts, functions, and footprints preclude direct replacement without PCB modification.
MAX6388XS23D7-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:
- 2.31V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS23D7-T FAQ
1.How can I place an order for MAX6388XS23D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS23D7-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 MAX6388XS23D7-T reliable?
The price and inventory of MAX6388XS23D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS23D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS23D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS23D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS23D7-T?
MAX6388XS23D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS23D7-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 MAX6388XS23D7-T?
For technical support, including MAX6388XS23D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS23D7-T requirements.
6.How does Aetrix verify that MAX6388XS23D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS23D7-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 MAX6388XS23D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS23D7-T?
All MAX6388XS23D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS23D7-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 MAX6388XS23D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS23D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS23D7-T Tags
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