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Analog Devices Inc./Maxim Integrated MAX6388XS20D5-T
- Part No.:
- MAX6388XS20D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS20D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,173
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Product details
Overview
MAX6388XS20D5-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, 2.0V factory-set VCC reset threshold (±2.5% over -40°C to +125°C), 280ms minimum VCC reset timeout, and auxiliary RESET IN input for monitoring a second voltage source. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered instrumentation and dual-rail embedded controllers.
For engineers reviewing the MAX6388XS20D5-T datasheet, MAX6388XS20D5-T pinout, MAX6388XS20D5-T application, or MAX6388XS20D5-T equivalent, key selection criteria include its 2.0V reset threshold accuracy, 280ms timeout, 4-pin SC70 package, auxiliary voltage monitoring capability, and compatibility with systems requiring guaranteed reset assertion during brownout and transient immunity.
Technical Context
The MAX6388XS20D5-T integrates a precision bandgap reference and comparator for VCC monitoring plus a dedicated auxiliary comparator referenced to +1.27V on the RESET IN pin. Its internal timer ensures reset remains asserted for exactly 280ms after VCC or RESET IN recovers above their respective thresholds.
It features an active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8×VCC, and supports manual reset initiation via external signal - though MAX6388 lacks MR input (confirmed by selector guide and pin configuration diagrams).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.00V (nominal), ±2.5% over -40°C to +125°C - ensures reliable power-fail detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 280ms (min) - provides sufficient hold time for μP initialization and peripheral stabilization after power recovery |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instruments |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance μP reset inputs directly |
| Auxiliary Input | RESET IN pin with +1.27V internal reference - allows user-defined secondary voltage monitoring via external resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1V supply |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6388XS20D5-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 rail - powers internal circuitry and triggers reset when falling below 2.00V threshold |
| 2 | RESET | Active-high push-pull output - asserts high during fault condition and holds for 280ms after recovery; sinks 80µA at VCC ≥ 1.0V |
| 3 | GND | Ground reference for all internal comparators and output stage - must be low-impedance connection to avoid noise-induced false resets |
| 4 | RESET IN | Auxiliary voltage monitor input - compared against +1.27V internal reference; reset asserts if voltage falls below threshold set by external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC and external voltage via RESET IN - enables single-chip protection for core/I/O dual-rail systems |
| Negative-going VCC transient immunity | Rejects glitches ≤ 100ns at 100mV overdrive - prevents spurious resets in electrically noisy environments like motor drives |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic μP behavior during deep undervoltage events without external level-shifting circuitry |
| Low quiescent current | 3μA at +1.8V - extends battery life in always-on portable medical and sensor nodes |
| Factory-trimmed threshold accuracy | ±2.5% over full temperature range - eliminates need for external calibration in production test |
Applications
| Industrial PLC I/O Modules | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Monitoring both 3.3V I/O supply and 1.8V core voltage in programmable logic controller field modules exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high reset to ARM Cortex-M microcontroller upon either rail collapse, with 280ms timeout ensuring firmware reload stability. Use Value: Eliminates separate reset ICs for each rail, reducing BOM count and PCB area while maintaining AEC-Q100–level reliability. |
Use Scenario: Long-term environmental monitoring using CR2032 coin cell powering an ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary supervisor detecting 2.0V brownout on main supply and secondary threshold on backup LDO output via RESET IN pin. Use Value: 3μA supply current extends operational lifetime beyond 5 years; guaranteed reset down to 1V prevents corrupted flash writes during final battery depletion. |
| Automotive Body Control Units | Dual-Rail FPGA Configuration Circuits |
Use Scenario: Power sequencing and fault detection in 12V-to-5V/3.3V distributed power architecture for door module ECUs. IC Role / Device Role / Timing Role: Supervises main 5V rail and auxiliary 3.3V communication bus voltage; asserts reset on first fault with 280ms hold time. Use Value: AEC-Q100 qualified variant available; ±2.5% threshold accuracy avoids false resets during cold-cranking transients. |
Use Scenario: Ensuring clean configuration of Xilinx Spartan-7 FPGA requiring coordinated 1.0V core and 1.8V I/O supply ramp-up. IC Role / Device Role / Timing Role: Monitors 1.8V I/O rail directly on VCC pin and 1.0V core via RESET IN with custom divider; generates synchronized active-high reset pulse. Use Value: Push-pull output drives FPGA PROG_B pin directly without pullup; 280ms timeout exceeds Spartan-7's required TPROG minimum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT20D5-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70 - larger footprint, better thermal dissipation (θJA = 477°C/W vs. 322.6°C/W) | Suitable for thermally demanding environments where SC70 self-heating may affect long-term threshold drift | Select when board layout allows larger package and thermal margin is prioritized over size |
| MAX6387XS20D5-T | Identical package and pinout, but open-drain active-low RESET output - requires external pullup resistor and inverted logic interface | Used where system-level reset bus is shared among multiple devices with wired-OR topology | Choose only if existing design uses active-low reset signaling or requires bus arbitration capability |
Compared with MAX6388XS20D5-T, the LT version trades compactness for thermal robustness in μDFN, while MAX6387XS20D5-T replaces push-pull drive with open-drain for bus-sharing - neither offers pin-compatible replacement without schematic or firmware changes.
Availability
MAX6388XS20D5-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered data loggers, automotive body control units, and dual-rail FPGA configuration circuits requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS20D5-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 integration.
The MAX6381–MAX6390 family delivers single/dual-voltage microprocessor supervisory functions with ultra-low quiescent current and AEC-Q100 qualification options - engineered for mission-critical power monitoring in harsh environments.
FAQ
What is the exact reset threshold voltage of MAX6388XS20D5-T and how stable is it over temperature?
The MAX6388XS20D5-T has a factory-set nominal VCC reset threshold of 2.00V, with guaranteed accuracy of ±2.5% across the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimmed internal resistors and a precision bandgap reference, eliminating need for external calibration in production. The MAX6388XS20D5-T maintains this tolerance without derating or additional compensation circuitry.
Does MAX6388XS20D5-T include a manual reset input (MR) pin?
No, MAX6388XS20D5-T does not feature a manual reset input. According to the selector guide and pin configuration diagrams, MR functionality is exclusive to MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6388XS20D5-T has only four pins: VCC, RESET, GND, and RESET IN - no MR terminal is present or internally connected.
What is the function of the RESET IN pin on MAX6388XS20D5-T and how is its threshold set?
The RESET IN pin on MAX6388XS20D5-T connects to an internal +1.27V reference comparator, enabling user-defined monitoring of a second voltage rail. Threshold is set externally using a resistor divider: VINTH = 1.27V × (R1/R2 + 1). For example, to detect 3.3V failure, use R2 = 100kΩ and R1 ≈ 158kΩ. Input leakage is ≤ ±50nA, allowing high-value resistors without accuracy loss.
Can MAX6388XS20D5-T operate reliably at VCC = 1.0V, and what happens to the RESET output below that?
Yes, MAX6388XS20D5-T guarantees correct RESET output logic state down to VCC = 1.0V - it will assert high during undervoltage and deassert cleanly upon recovery. Below 1.0V, the device ceases functional operation and RESET output becomes undefined. For applications requiring valid reset down to 0V, external pulldown resistors are needed - but this scheme is incompatible with MAX6388XS20D5-T's push-pull output per datasheet guidance.
Is MAX6388XS20D5-T pin-compatible with legacy Maxim reset ICs like MAX809?
MAX6388XS20D5-T is not pin-compatible with MAX809 or similar 3-pin reset ICs due to its 4-pin SC70 configuration and inclusion of RESET IN. While the datasheet notes "pin compatible with MAX809/MAX810…" for the broader family, this refers only to the 3-pin variants (e.g., MAX6381XRxxDx-T). The MAX6388XS20D5-T requires a unique 4-pin layout and cannot substitute into existing 3-pin footprints without PCB revision.
MAX6388XS20D5-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:
- 2V, 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
MAX6388XS20D5-T FAQ
1.How can I place an order for MAX6388XS20D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS20D5-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 MAX6388XS20D5-T reliable?
The price and inventory of MAX6388XS20D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS20D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS20D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS20D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS20D5-T?
MAX6388XS20D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS20D5-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 MAX6388XS20D5-T?
For technical support, including MAX6388XS20D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS20D5-T requirements.
6.How does Aetrix verify that MAX6388XS20D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS20D5-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 MAX6388XS20D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS20D5-T?
All MAX6388XS20D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS20D5-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 MAX6388XS20D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS20D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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