My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6388XS31D4-T
- Part No.:
- MAX6388XS31D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS31D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,187
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6388XS31D4-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.08V VCC reset threshold (±2.5% over -40°C to +125°C), 1120ms 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 power-critical embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS31D4-T datasheet, MAX6388XS31D4-T pinout, MAX6388XS31D4-T application, or MAX6388XS31D4-T equivalent, this device delivers guaranteed reset assertion down to VCC = 1V, negative-going transient immunity, and dual-supply monitoring capability in a space-constrained 4-pin SC70 package - critical for portable, automotive, and industrial control designs.
Technical Context
The MAX6388XS31D4-T integrates a precision voltage comparator for VCC monitoring against a fixed 3.08V threshold and a separate high-impedance RESET IN comparator referenced to 1.27V, enabling user-defined secondary voltage supervision via external resistor divider. Its internal timer guarantees ≥1120ms reset assertion after VCC recovery.
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 only in sibling parts (not this variant). The device is AEC-Q100 qualified and specified for operation from -40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.00V (min) / 3.08V (nom) / 3.15V (max) - factory-trimmed for precise 3.08V brownout detection with ±2.5% accuracy across full temperature range |
| Reset Timeout Period | 1120ms (min) - ensures μP remains held in reset long enough for stable power rail recovery before code execution resumes |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in always-on sensor nodes and portable equipment |
| Operating Voltage Range | 1.0V to 5.5V - supports direct interface with 1.2V/1.8V/2.5V/3.3V/5V logic and power domains without level-shifting |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and provides robust drive strength (VOH ≥ 0.8×VCC, VOL ≤ 0.3V) |
| Auxiliary Input | RESET IN pin with 1.27V internal reference - allows monitoring of second voltage rail (e.g., I/O supply) using external resistor divider |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial PLC, and harsh-environment applications |
Pinout & Package
MAX6388XS31D4-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, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node; powers internal circuitry and sets reset threshold reference point |
| 2 | RESET | Active-high push-pull reset output; drives high during fault condition (VCC < 3.08V or RESET IN < 1.27V) and holds for ≥1120ms post-recovery |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing and noise immunity |
| 4 | RESET IN | High-impedance auxiliary input monitored against 1.27V internal reference; used to supervise secondary voltage (e.g., core vs. I/O rail) via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (3.08V threshold) and external rail via RESET IN (1.27V reference), enabling fail-safe dual-rail power sequencing |
| Ultra-low quiescent current | 3μA at 1.8V ensures minimal battery drain in always-on IoT edge nodes and wearables operating for years on coin cells |
| Guaranteed reset validity | RESET output state remains valid down to VCC = 1.0V - prevents spurious release during deep brownout conditions |
| Negative transient immunity | Withstands VCC glitches up to 35µs duration when overdrive is ≤100mV below threshold - reduces false resets in noisy automotive environments |
| AEC-Q100 qualification | Qualified for automotive applications per AEC-Q100 Rev G, supporting use in engine control units, ADAS sensors, and infotainment power management |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors both main 5V logic supply and 3.3V microcontroller core voltage in engine ECU to prevent erratic behavior during cranking or load dump. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high RESET until both supplies stabilize above thresholds, with 1120ms hold time ensuring firmware integrity. Use Value: Eliminates need for two discrete supervisors; RESET IN pin enables precise 3.3V core monitoring without external reference IC. |
Use Scenario: Ensures deterministic startup of ARM-based PLC CPU by validating 2.5V I/O rail and 1.2V core rail before boot sequence begins. IC Role / Device Role / Timing Role: Primary reset generator with factory-trimmed 3.08V threshold on VCC and user-configurable secondary threshold on RESET IN. Use Value: 1120ms timeout exceeds typical FPGA configuration time; push-pull output drives reset bus directly without pullup. |
| Portable Medical Sensor Node | Battery-Powered Smart Meter |
Use Scenario: Supervises 1.8V MCU supply and 3.0V sensor bias rail in wearable ECG patch, triggering reset if either drops during battery depletion. IC Role / Device Role / Timing Role: Low-power supervisor consuming only 3μA at 1.8V, extending coin-cell lifetime while guaranteeing reset down to VCC = 1V. Use Value: Enables single-chip dual-rail monitoring in <2mm² footprint - critical for miniaturized medical devices. |
Use Scenario: Validates 3.3V communication module supply and 1.8V metrology ADC supply in AMI smart meter exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisor operating reliably from -40°C to +125°C with ±2.5% threshold accuracy over full range. Use Value: RESET IN pin allows independent adjustment of secondary threshold to match aging Li-SOCl₂ battery discharge profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT31D4-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70; includes NC pins and different thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Better thermal performance in high-power density layouts; requires larger PCB footprint and different land pattern (90-0080 vs. 90-0187) | Select when board layout allows μDFN and higher power dissipation margin is needed. |
| TLV809E30DBZR | Single-supply 3.0V supervisor (±2% threshold), 140ms timeout, SOT-23-3 package; no RESET IN pin, no AEC-Q100 qualification | Lacks dual-voltage monitoring and automotive qualification; lower cost for basic single-rail applications | Choose only for cost-sensitive, non-automotive, single-rail designs where auxiliary monitoring is unnecessary. |
Compared with MAX6388XS31D4-T, the LT31D4-T variant offers identical functionality in a smaller 4-pin SC70 footprint ideal for space-constrained designs, while TLV809E30DBZR provides a lower-cost alternative for simple single-supply supervision but sacrifices dual-rail capability, automotive qualification, and extended timeout.
Availability
MAX6388XS31D4-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, portable medical sensor nodes, and battery-powered smart meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS31D4-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 communications applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessors in harsh environments, emphasizing dual-rail monitoring, AEC-Q100 compliance, and miniature packaging for next-generation embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6388XS31D4-T?
The MAX6388XS31D4-T has a factory-set VCC reset threshold of 3.08V nominal, with guaranteed minimum of 3.00V and maximum of 3.15V at +25°C. Over the full operating temperature range (-40°C to +125°C), the threshold remains within ±2.5% of 3.08V, i.e., 3.00V to 3.15V. This value is encoded in the "31" suffix per the Reset Threshold table in the datasheet.
Does MAX6388XS31D4-T support manual reset functionality?
No, MAX6388XS31D4-T does not include a manual reset (MR) input. According to the Selector Guide and Pin Configurations, MR is only present on MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6388XS31D4-T pinout consists solely of VCC, RESET, GND, and RESET IN - confirming absence of MR functionality.
What is the purpose of the RESET IN pin on MAX6388XS31D4-T?
The RESET IN pin on MAX6388XS31D4-T connects to an internal 1.27V comparator reference, enabling supervision of a second voltage rail. By applying a resistor divider to RESET IN, users can set a custom reset threshold (e.g., 2.5V or 1.8V) for auxiliary power domains. Reset asserts if either VCC falls below 3.08V or RESET IN falls below its configured threshold.
What package type and dimensions does MAX6388XS31D4-T use?
MAX6388XS31D4-T uses a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This compact footprint supports high-density PCB layouts in space-constrained applications such as portable medical devices and automotive sensors.
Is MAX6388XS31D4-T qualified for automotive applications?
Yes, MAX6388XS31D4-T is AEC-Q100 qualified for automotive applications. The "/V" designation is optional in ordering codes (e.g., MAX6388XS31D4/V+T), but the base MAX6388XS31D4-T part meets AEC-Q100 Rev G requirements per the datasheet's Ordering Information and Features sections, supporting use in engine control, ADAS, and infotainment systems.
MAX6388XS31D4-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:
- 3.08V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS31D4-T FAQ
1.How can I place an order for MAX6388XS31D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS31D4-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 MAX6388XS31D4-T reliable?
The price and inventory of MAX6388XS31D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS31D4-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS31D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS31D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS31D4-T?
MAX6388XS31D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS31D4-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 MAX6388XS31D4-T?
For technical support, including MAX6388XS31D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS31D4-T requirements.
6.How does Aetrix verify that MAX6388XS31D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS31D4-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 MAX6388XS31D4-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS31D4-T?
All MAX6388XS31D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS31D4-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 MAX6388XS31D4-T part is unused and in its original packaging.
Return procedure for MAX6388XS31D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS31D4-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
