My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6390XS46D4+T
- Part No.:
- MAX6390XS46D4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS46D4+T.pdf
- Description:
- IC MPU/RESET CIRC 4.63V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6390XS46D4+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.63V reset threshold (±2.5% over –40°C to +125°C), 1120ms VCC reset timeout, and 140ms manual reset timeout. It monitors single supply voltage in battery-powered or industrial embedded systems where reliable power-up sequencing and brownout protection are critical.
For engineers reviewing the MAX6390XS46D4+T datasheet, MAX6390XS46D4+T pinout, MAX6390XS46D4+T application, or MAX6390XS46D4+T equivalent, key selection considerations include its 4-pin SC70 package, 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, and dedicated MR input with 1.56kΩ internal pullup resistor.
Technical Context
The MAX6390XS46D4+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across temperature, coupled to a digital timeout counter that enforces minimum 1120ms assertion after VCC recovery and 140ms after MR release. Its open-drain RESET output requires an external pullup and remains valid down to VCC = 1V.
Unlike earlier family members, MAX6390XS46D4+T features a significantly lower MR internal pullup resistance (1.56kΩ vs. 63kΩ in MAX6384–MAX6386), enabling faster MR edge response and improved noise immunity in high-impedance environments - confirmed by 100ns MR glitch rejection and 200ns MR-to-RESET delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (nominal), ±2.5% over –40°C to +125°C - ensures stable reset assertion across automotive and industrial temperature ranges |
| VCC Reset Timeout | 1120ms (min) - guarantees μP remains held in reset long enough for full power stabilization after brownout recovery |
| Manual Reset Timeout | 140ms (min) - provides short, deterministic reset pulse for operator-initiated recovery without system lockup |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instrumentation |
| MR Pullup Resistance | 1.56kΩ (typical) - supports direct connection to open-drain logic or long traces without external biasing |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration with other reset sources and flexible voltage-level translation |
| Operating Voltage Range | 1.0V to 5.5V - ensures valid reset state even during deep brownout conditions before full system shutdown |
Pinout & Package
MAX6390XS46D4+T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.1mm × 0.6mm, optimized for space-constrained portable and wearable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and monitored voltage source; powers internal circuitry and reset comparator |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; sinks up to 3.2mA at VCC ≥ 4.5V |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 1.56kΩ resistor; asserts reset when pulled ≤ 0.3×VCC |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor divider and calibration effort for +5V rail monitoring |
| 1120ms/140ms dual timeout architecture | Separates power-recovery hold time from user-initiated reset duration, preventing spurious reboots |
| 1.56kΩ MR internal pullup | Reduces susceptibility to EMI on manual reset lines and enables direct switch-to-GND interface without external components |
| Valid reset output down to VCC = 1V | Ensures deterministic μP state during deep undervoltage events, avoiding undefined instruction execution |
| Negative-going VCC transient immunity | Withstands <100µs glitches up to 200mV below threshold - critical for noisy DC-DC converter outputs |
Applications
| Industrial PLC Power Monitoring | Battery-Powered Medical Sensor Node |
|---|---|
Use Scenario: Monitors 5V auxiliary supply in programmable logic controller I/O modules during AC line sags or backup battery switchover. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 MCU until 5V rail stabilizes above 4.63V for ≥1120ms. Use Value: Prevents firmware corruption during 100–500ms brownouts common in factory floor power distribution. | Use Scenario: Powers continuous glucose monitor with CR2032 coin cell; detects end-of-life voltage drop below 4.63V. IC Role / Device Role / Timing Role: Open-drain RESET drives shared reset bus across BLE SoC and analog front-end; MR pin enables clinical staff to force recalibration. Use Value: 3μA quiescent current extends usable battery life to >2 years; 140ms MR timeout avoids accidental double-press resets. |
| Automotive Body Control Module | Point-of-Sale Terminal Power Sequencing |
Use Scenario: Validates 5V domain in AEC-Q100 qualified body control unit after cold crank (battery dip to 6V). IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx microcontroller only after VCC exceeds 4.63V and remains stable for 1120ms - matching CAN FD initialization timing. Use Value: Meets ISO 16750-2 pulse 4a requirements for undervoltage immunity; ±2.5% threshold accuracy ensures consistent behavior across -40°C to +125°C. | Use Scenario: Controls power-up sequence of dual-rail (3.3V/5V) payment terminal with EMV L2 certification. IC Role / Device Role / Timing Role: First-stage supervisor for 5V rail; RESET output enables secondary LDO for 3.3V logic; MR pin tied to hardware watchdog signal. Use Value: 1120ms timeout aligns with PCIe slot power-good timing; open-drain output allows OR-ing with security IC's fault signal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR46D4+T | Same 4.63V threshold and 1120ms timeout, but push-pull active-low output and no MR input | Lacks manual reset capability; requires external pullup not needed for push-pull | Select when board layout prohibits external pullup or MR function is unnecessary |
| TLV803EB46DBZR | 4.63V threshold, 140ms timeout, SOT-23-3 package; no MR input; 0.5μA supply current at 1.8V | Lower power but no manual reset; smaller footprint but higher thermal resistance (θJA = 274°C/W) | Select for ultra-low-power sensor nodes where MR is unused and space is constrained |
Compared with MAX6326XR46D4+T and TLV803EB46DBZR, MAX6390XS46D4+T uniquely combines factory-trimmed 4.63V detection, dual-timing architecture (1120ms VCC + 140ms MR), and integrated 1.56kΩ MR pullup in a 4-pin SC70 - enabling compact, robust reset control without external components in battery-backed or automotive systems.
Availability
MAX6390XS46D4+T is available at Aetrix Electronics and suitable for industrial PLC power monitoring, battery-powered medical sensor nodes, automotive body control modules, and point-of-sale terminal power sequencing requiring stable component supply and AEC-Q100-aligned reliability.
Supply support for MAX6390XS46D4+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 small form factor.
The MAX6381–MAX6390 product line delivers single/dual low-voltage microprocessor supervisory circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6390XS46D4+T and how stable is it over temperature?
The MAX6390XS46D4+T has a nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating range of –40°C to +125°C. This stability is achieved through laser-trimmed bandgap reference circuitry and is documented in the Electrical Characteristics table under "VCC Reset Threshold" with min/typ/max values of 4.51V/4.63V/4.74V at +25°C and ±2.5% drift across temperature. The MAX6390XS46D4+T maintains this accuracy without external calibration.
Does MAX6390XS46D4+T support manual reset functionality, and what are the electrical characteristics of its MR pin?
Yes, MAX6390XS46D4+T includes a dedicated active-low manual reset (MR) input. Its MR pin features an internal 1.56kΩ pullup resistor to VCC (significantly lower than the 63kΩ in earlier MAX6384–MAX6386 variants), enabling robust noise immunity and fast edge response. MR asserts reset when driven ≤0.3×VCC and rejects glitches as short as 100ns. The MAX6390XS46D4+T datasheet specifies MR-to-RESET delay as 200ns, confirming deterministic timing for system-level reset coordination.
What package type and pin count does MAX6390XS46D4+T use, and is it RoHS-compliant?
MAX6390XS46D4+T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.1mm × 0.6mm. The "+T" suffix explicitly denotes lead(Pb)-free and RoHS-compliant construction per Maxim Integrated's ordering conventions. This package is optimized for high-density PCB layouts in portable and automotive applications where thermal performance and footprint size are critical.
How does the reset timeout behavior differ between VCC recovery and manual reset release in MAX6390XS46D4+T?
MAX6390XS46D4+T implements asymmetric timeout periods: a 1120ms (min) reset assertion period after VCC rises above 4.63V, and a shorter 140ms (min) assertion period after MR is released. This dual-timing architecture prevents unnecessary system downtime during user-triggered resets while ensuring sufficient hold time for full power rail stabilization after brownout. Both timeouts are guaranteed minimum values per the datasheet's "Reset Timeout Period" table for MAX6390.
Can MAX6390XS46D4+T operate reliably at very low supply voltages, and what is its minimum functional VCC?
Yes, MAX6390XS46D4+T guarantees correct reset output logic state down to VCC = 1.0V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Its internal circuitry remains fully functional across the 1.0V to 5.5V operating range, and the reset comparator continues to assert correctly even during deep brownout conditions. This ensures deterministic μP behavior in failing-power scenarios where other supervisors may enter undefined states - a key requirement validated in the "Ensuring a Valid RESET Output Down to VCC = 0V" application note section of the MAX6390XS46D4+T datasheet.
MAX6390XS46D4+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6390XS46D4+T FAQ
1.How can I place an order for MAX6390XS46D4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS46D4+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 MAX6390XS46D4+T reliable?
The price and inventory of MAX6390XS46D4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS46D4+T is usually 5 days.
3.What payment methods are accepted for MAX6390XS46D4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS46D4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS46D4+T?
MAX6390XS46D4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS46D4+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 MAX6390XS46D4+T?
For technical support, including MAX6390XS46D4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS46D4+T requirements.
6.How does Aetrix verify that MAX6390XS46D4+T is sourced from the original manufacturer or authorized distributors?
All MAX6390XS46D4+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 MAX6390XS46D4+T meets industry standards.
7.What is the process for return or replacement of MAX6390XS46D4+T?
All MAX6390XS46D4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS46D4+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 MAX6390XS46D4+T part is unused and in its original packaging.
Return procedure for MAX6390XS46D4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6390XS46D4+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…
