My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6390XS31D7+T
- Part No.:
- MAX6390XS31D7+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS31D7+T.pdf
- Description:
- IC MPU/RESET CIRC 3.08V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:8,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6390XS31D7+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 3.08V reset threshold (±2.5% over -40°C to +125°C), 1200ms VCC reset timeout, and 150ms manual reset timeout. It monitors single supply voltage in battery-powered controllers and portable instrumentation where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6390XS31D7+T datasheet, MAX6390XS31D7+T pinout, MAX6390XS31D7+T application, or MAX6390XS31D7+T equivalent, key selection factors include its 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, 1.56kΩ internal MR pullup, and SC70-4 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6390XS31D7+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across temperature, paired with a digital timeout counter that enforces minimum 1200ms assertion after VCC recovery and 150ms after manual reset release. Its open-drain RESET output requires an external pullup and remains valid down to VCC = 1V.
It features a dedicated active-low manual reset input (MR) with internal 1.56kΩ pullup resistor-distinct from earlier family members using 63kΩ-and supports noise immunity via optional 0.1μF capacitor to GND. Unlike MAX6387–MAX6389 variants, it lacks auxiliary RESET IN functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal (suffix "31"), ±2.5% tolerance over -40°C to +125°C - ensures stable reset point across automotive and industrial temperature ranges |
| VCC Reset Timeout | 1200ms minimum - guarantees μP remains held in reset long enough for full power stabilization in systems with slow-rising rails |
| Manual Reset Timeout | 150ms minimum - provides short, deterministic reset pulse when triggered by external switch or logic, minimizing system downtime |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable medical devices |
| Reset Output Type | Open-drain active-low - allows wired-OR configuration with other reset sources and flexible voltage-level translation via external pullup |
| MR Pullup Resistance | 1.56kΩ (typical) - delivers robust noise immunity and fast MR release time compared to 63kΩ variants, reducing susceptibility to false triggers |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions, critical for fail-safe shutdown sequencing |
Pinout & Package
MAX6390XS31D7+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. This ultra-compact footprint suits high-density PCB layouts in wearables and handheld instruments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET (open-drain) | Active-low reset signal output requiring external pullup; asserts low during VCC undervoltage or MR activation and holds for timeout period |
| 3 | MR | Active-low manual reset input with internal 1.56kΩ pullup to VCC; drives reset when pulled to GND, enabling field service or test-mode resets |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers; must be connected to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% accuracy over full temperature range eliminates need for external resistor dividers or calibration |
| Dual timeout timing | Separate 1200ms VCC timeout and 150ms MR timeout enables optimized power-up sequencing and responsive manual intervention |
| Ultra-low quiescent current | 3μA at 1.8V extends battery life in always-on monitoring applications without compromising reset reliability |
| Valid reset down to VCC = 1V | Ensures deterministic μP state control during deep brownout events, preventing erratic code execution before complete power loss |
| SC70-4 package | 2.0mm × 2.1mm footprint reduces board area by >50% vs. SOT-23 alternatives, supporting miniaturized portable electronics |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous glucose monitor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output; asserts reset if battery voltage drops below 3.08V during cold start or aging. Use Value: Prevents corrupted sensor readings and firmware crashes by holding MCU in reset until stable 3.3V rail is confirmed for 1200ms. |
Use Scenario: Environmental data logger deployed in remote locations, powered by Li-SOCl₂ primary battery. IC Role / Device Role / Timing Role: Monitors main system rail and provides manual reset via pushbutton for field recalibration. Use Value: 150ms MR timeout enables rapid, non-disruptive reinitialization without extended system downtime. |
| Industrial Handheld Controllers | Automotive Body Control Modules |
|
Use Scenario: Ruggedized HMI controller used in factory floor environments with fluctuating 5V supply. IC Role / Device Role / Timing Role: Detects brownout on 3.3V logic rail and generates clean reset pulse synchronized to power recovery. Use Value: Open-drain RESET output interfaces directly with 5V-tolerant μP reset inputs via 4.7kΩ pullup, eliminating level-shifter components. |
Use Scenario: Low-voltage subsystem in BCM managing door locks and lighting, requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Provides reset supervision for 3.3V microcontroller core with guaranteed operation from -40°C to +125°C. Use Value: ±2.5% reset threshold accuracy over temperature prevents spurious resets during thermal cycling in under-hood applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6390XS31D4+T | Same 3.08V threshold and open-drain output, but 1120ms VCC timeout and 140ms MR timeout | Suitable for systems requiring slightly shorter reset hold times during power-up or manual reset | Select when tighter timing margins are needed without changing layout or BOM footprint |
| MAX6326XR31D7+T | Pin-compatible 3-pin SC70 variant with same 3.08V threshold and 1200ms timeout, but no MR input | Applicable where manual reset is unnecessary and board space is extremely constrained | Choose for cost-sensitive, minimal-feature applications where MR functionality is omitted |
Compared with MAX6390XS31D7+T, the D4 variant offers reduced reset duration for faster system recovery, while the MAX6326 provides identical threshold and timeout in a smaller 3-pin package at the expense of manual reset capability-enabling trade-offs between feature set, timing, and board area.
Availability
MAX6390XS31D7+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial handheld controllers, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6390XS31D7+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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers single-supply microprocessor reset supervision with ultra-low current consumption and factory-trimmed thresholds, targeting space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6390XS31D7+T?
The MAX6390XS31D7+T has a factory-set nominal reset threshold of 3.08V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is encoded in the "31" suffix per Maxim's reset threshold table and is measured at VCC relative to internal bandgap reference.
Does MAX6390XS31D7+T support manual reset functionality?
Yes, MAX6390XS31D7+T includes an active-low manual reset input (MR) with an internal 1.56kΩ pullup resistor to VCC. Driving MR low forces reset assertion for the manual reset timeout period (150ms min), then holds reset active for that duration after MR is released. This enables field-service or test-mode resets without external components.
What is the supply current of MAX6390XS31D7+T at 1.8V?
The MAX6390XS31D7+T draws only 3μA of supply current at VCC = 1.8V (typical), rising to 6μA at 3.6V and 13μA at 5.5V. This ultra-low quiescent current is specified over the full -40°C to +125°C temperature range and enables multi-year operation in battery-powered applications.
What package type and dimensions does MAX6390XS31D7+T use?
MAX6390XS31D7+T is supplied in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. Its compact footprint and thermal resistance (θJA = 322.6°C/W on multilayer board) make it ideal for high-density portable electronics.
Is MAX6390XS31D7+T compatible with AEC-Q100 automotive qualification?
No, MAX6390XS31D7+T is not AEC-Q100 qualified. While it operates across -40°C to +125°C and shares design heritage with automotive-grade variants (e.g., parts with "/V" suffix), the MAX6390XS31D7+T part number itself carries no automotive qualification. For AEC-Q100 applications, select MAX6390XS31D7/V+T or equivalent /V-trim versions.
MAX6390XS31D7+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6390XS31D7+T FAQ
1.How can I place an order for MAX6390XS31D7+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS31D7+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 MAX6390XS31D7+T reliable?
The price and inventory of MAX6390XS31D7+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS31D7+T is usually 5 days.
3.What payment methods are accepted for MAX6390XS31D7+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS31D7+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS31D7+T?
MAX6390XS31D7+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS31D7+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 MAX6390XS31D7+T?
For technical support, including MAX6390XS31D7+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS31D7+T requirements.
6.How does Aetrix verify that MAX6390XS31D7+T is sourced from the original manufacturer or authorized distributors?
All MAX6390XS31D7+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 MAX6390XS31D7+T meets industry standards.
7.What is the process for return or replacement of MAX6390XS31D7+T?
All MAX6390XS31D7+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS31D7+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 MAX6390XS31D7+T part is unused and in its original packaging.
Return procedure for MAX6390XS31D7+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6390XS31D7+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…
