My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6385XS45D3-T
- Part No.:
- MAX6385XS45D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS45D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,453
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6385XS45D3-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 4.50V reset threshold, 140ms minimum VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails in space-constrained applications, consumes only 3μA at +1.8V, guarantees valid reset output down to VCC = 1V, and operates across –40°C to +125°C for industrial and automotive systems.
For engineers reviewing the MAX6385XS45D3-T datasheet, MAX6385XS45D3-T pinout, MAX6385XS45D3-T application, or MAX6385XS45D3-T equivalent, key selection criteria include its 4.50V ±2.5% threshold accuracy over temperature, debounced MR input with internal 63kΩ pullup, 4-pin SC70 package footprint, and compatibility with dual-voltage monitoring architectures requiring deterministic reset timing.
Technical Context
The MAX6385XS45D3-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 140ms reset assertion after VCC rises above 4.50V or after release of the active-low MR signal.
This device features an active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8×VCC, and sinking 3.2mA while holding VOL ≤ 0.4V. The MR input accepts TTL/CMOS logic levels and includes built-in glitch rejection (100ns) and 1µs minimum pulse width requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.50V nominal, ±2.5% over –40°C to +125°C - ensures reliable brownout detection across full industrial temperature range |
| VCC Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment without compromising reset integrity |
| Reset Timeout Period | 140ms minimum - provides sufficient hold time for microprocessor initialization sequences |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup and supports direct switch-to-GND connection |
| Operating Voltage Range | +1.0V to +5.5V - guarantees functional reset assertion even during deep brownout conditions |
| RESET Output Type | Active-high push-pull - drives high-impedance loads directly without external components |
| Package | 4-pin SC70 (X4+1 outline) - occupies 1.6mm × 1.2mm PCB area, compatible with automated SMT assembly |
Pinout & Package
MAX6385XS45D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.6mm × 1.2mm × 0.9mm with gull-wing leads. Thermal resistance θJA is 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored rail - powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET | Active-high push-pull output - asserts high during fault condition and remains high for 140ms after recovery |
| 3 | GND | Analog and digital ground reference - must be connected to system ground plane for stable comparator operation |
| 4 | MR | Active-low manual reset input - forces reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.50V threshold | Eliminates external resistor networks and calibration steps in power-rail monitoring designs |
| 140ms guaranteed-minimum reset timeout | Ensures microcontroller core and peripherals fully initialize before code execution resumes |
| Debounced MR input with internal pullup | Supports direct connection of momentary switches without external RC filtering or logic gates |
| Valid reset output down to VCC = 1V | Maintains deterministic logic state during severe undervoltage events, preventing spurious resets |
| Negative-going VCC transient immunity | Rejects sub-100µs glitches below reset threshold - reduces false triggers in electrically noisy environments |
Applications
| Industrial PLC Power Monitoring | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5V system rail in programmable logic controllers during mains brownouts and hot-swap events. IC Role / Device Role / Timing Role: μP supervisory circuit asserting active-high reset to halt firmware execution until stable 5V is restored. Use Value: 140ms timeout ensures FPGA configuration and I/O driver initialization complete before resuming control loop execution. |
Use Scenario: Supervises 5V supply to microcontroller in door module ECUs exposed to load-dump transients. IC Role / Device Role / Timing Role: Reset generator with 4.50V threshold detecting battery voltage sag below safe operating level. Use Value: ±2.5% threshold accuracy over –40°C to +125°C prevents premature reset during cold cranking or under-hood thermal cycling. |
| Portable Medical Sensor Hub | Dual-Voltage IoT Edge Node |
|
Use Scenario: Powers ultra-low-power sensor fusion MCU from coin-cell battery with tight voltage regulation. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling multi-year battery life while guaranteeing clean boot sequence. Use Value: 3μA supply current at 1.8V extends operational lifetime beyond 5 years in sleep-dominated duty cycles. |
Use Scenario: Manages independent 3.3V and 1.8V rails in wireless gateway SoC subsystems. IC Role / Device Role / Timing Role: Primary VCC monitor with MR input allowing coordinated reset initiation across voltage domains. Use Value: Internal MR pullup simplifies BOM by removing discrete resistor, reducing component count in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385LT45D3-T | Same electrical specs but in 6-pin µDFN (L611+1) instead of 4-pin SC70 - larger footprint, lower thermal resistance (θJA = 477°C/W) | Preferred where board-level thermal management is critical or where µDFN placement aligns with existing layout standards | Select when higher power dissipation margin or mechanical robustness is required; not drop-in compatible due to different pin count and layout |
| TPS3808G33DBVR | 3.3V fixed threshold (not 4.50V), 200ms timeout, 1.6μA typical ICC at 3.3V - different threshold and timing binning | Suitable for 3.3V-only systems needing longer timeout; lacks MR input debounce and ±2.5% over-temp accuracy | Choose only if 3.3V monitoring suffices and extended timeout is acceptable; requires redesign of reset timing and threshold validation |
Compared with MAX6385XS45D3-T, the LT45D3-T variant offers identical functionality in a thermally superior but physically larger package, while TPS3808G33DBVR serves a different voltage tier with relaxed accuracy and no MR debouncing - neither is pin-compatible, and both require schematic and layout revision.
Availability
MAX6385XS45D3-T is available at Aetrix Electronics and suitable for industrial PLC power monitoring, automotive body control modules, portable medical sensor hubs, and dual-voltage IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS45D3-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 reliability and low-power operation.
The MAX6381–MAX6390 family delivers single/dual low-voltage μP reset circuits optimized for space-constrained, battery-sensitive, and thermally aggressive environments where deterministic power-on reset behavior is mission-critical.
FAQ
What is the exact reset threshold voltage of the MAX6385XS45D3-T?
The MAX6385XS45D3-T has a factory-set nominal reset threshold of 4.50V, with tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "45" corresponds to VTH(nom) = 4.50V, VTH(min) = 4.39V, and VTH(max) = 4.61V at +25°C.
Does the MAX6385XS45D3-T support manual reset functionality?
Yes, the MAX6385XS45D3-T includes a debounced active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces reset assertion, and the device holds RESET high for the full 140ms timeout after MR is released. No external components are needed for basic switch interfacing.
What package type and dimensions does the MAX6385XS45D3-T use?
The MAX6385XS45D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.2mm × 0.9mm with gull-wing leads. It is RoHS-compliant (+ suffix) and rated for –40°C to +125°C operation, with thermal resistance θJA = 322.6°C/W on a multilayer PCB.
How does the MAX6385XS45D3-T behave during deep brownout conditions?
The MAX6385XS45D3-T guarantees valid reset output down to VCC = 1.0V, meaning its RESET pin remains in a known active-high state even as supply voltage collapses. This prevents metastability or undefined logic states in downstream microcontrollers during severe undervoltage events.
Is the MAX6385XS45D3-T pin-compatible with older Maxim reset ICs like MAX809?
Yes, the MAX6385XS45D3-T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other legacy supervisors in the Features section of the datasheet. However, this refers to functional equivalence and shared pin assignments - physical SC70 footprint matches, but design validation is required due to differences in timing, threshold accuracy, and MR behavior.
MAX6385XS45D3-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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS45D3-T FAQ
1.How can I place an order for MAX6385XS45D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS45D3-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 MAX6385XS45D3-T reliable?
The price and inventory of MAX6385XS45D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS45D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS45D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS45D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS45D3-T?
MAX6385XS45D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS45D3-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 MAX6385XS45D3-T?
For technical support, including MAX6385XS45D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS45D3-T requirements.
6.How does Aetrix verify that MAX6385XS45D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS45D3-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 MAX6385XS45D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS45D3-T?
All MAX6385XS45D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS45D3-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 MAX6385XS45D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS45D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6385XS45D3-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…
