My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6385XS21D6-T
- Part No.:
- MAX6385XS21D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS21D6-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,533
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6385XS21D6-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.10V reset threshold, 560ms minimum VCC reset timeout, and manual reset input. It monitors single supply voltage (1.0V–5.5V), consumes only 3μA at 1.8V, and guarantees valid reset output down to VCC = 1V. Used in battery-powered controllers and portable instrumentation for reliable power-up/brownout protection.
For engineers reviewing the MAX6385XS21D6-T datasheet, MAX6385XS21D6-T pinout, MAX6385XS21D6-T application, or MAX6385XS21D6-T equivalent, key selection criteria include its active-high push-pull output logic, 2.10V ±2.5% threshold accuracy over –40°C to +125°C, 560ms reset timeout, MR debounced input with internal 63kΩ pullup, and 4-pin SC70 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6385XS21D6-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monotonic RC timer for deterministic 560ms reset assertion after VCC recovery. Its active-high push-pull output drives directly into μP reset inputs without external pullups.
It integrates a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection, internally pulled up to VCC via 63kΩ. The device asserts reset when VCC falls below 2.10V or MR is driven low, maintaining reset for the full 560ms timeout after either condition clears.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.10V ±2.5% over –40°C to +125°C - ensures stable reset activation across automotive and industrial temperature ranges |
| VCC Reset Timeout | 560ms minimum - provides sufficient hold time for microprocessor initialization after power stabilization |
| Supply Current | 3μA at 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to CMOS/TTL reset inputs |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows momentary switch interface without external RC filtering |
| Operating Voltage Range | 1.0V to 5.5V - supports monitoring of core, I/O, and auxiliary rails in modern low-voltage SoC systems |
| Reset Output Validity | Guaranteed down to VCC = 1V - maintains correct logic state during deep brownout conditions before complete power loss |
Pinout & Package
MAX6385XS21D6-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 | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET | Active-high push-pull output - drives high during normal operation; pulls low only during reset assertion |
| 3 | GND | Analog and digital ground reference - must be connected to system ground plane for accurate threshold sensing and noise immunity |
| 4 | MR | Active-low manual reset input - initiates reset when pulled below 0.3×VCC; internally pulled up to VCC via 63kΩ resistor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.10V threshold | Eliminates external resistor networks and calibration steps in production, reducing BOM count and test time |
| 560ms guaranteed reset timeout | Ensures μP completes boot sequence before release, preventing race conditions in firmware initialization |
| MR input with integrated 63kΩ pullup | Supports direct connection of normally open tactile switches without external components or layout overhead |
| 3μA supply current at 1.8V | Extends battery life in always-on monitoring applications such as medical patches and environmental loggers |
| Valid reset output down to VCC = 1V | Maintains deterministic system behavior during gradual power collapse, enabling safe shutdown sequences |
Applications
| Portable/Battery-Powered Equipment | Intelligent Instruments |
|---|---|
Use Scenario: Coin-cell–powered handheld multimeter with auto-power-down and wake-on-button functionality. IC Role / Device Role / Timing Role: Supervises main 3.0V supply rail and asserts active-high RESET to MSP430 MCU upon undervoltage or manual button press. Use Value: 3μA quiescent current extends battery life beyond 5 years; 560ms timeout ensures full ADC calibration completes before firmware execution resumes. | Use Scenario: Portable gas analyzer with dual-rail power (3.3V analog front-end, 1.8V digital core) requiring synchronized reset sequencing. IC Role / Device Role / Timing Role: Monitors 3.3V rail and provides clean, glitch-immune active-high reset signal to ARM Cortex-M0+ processor. Use Value: ±2.5% threshold accuracy prevents false resets during temperature swings in field deployments; MR input enables field recalibration reset without opening enclosure. |
| Controllers | Critical μP and μC Systems |
Use Scenario: Industrial PLC I/O module operating in –40°C to +85°C ambient with 2.5V core supply. IC Role / Device Role / Timing Role: Provides fail-safe reset supervision for STM32H743 MCU, asserting RESET if 2.5V rail dips below 2.10V during ESD event or load transient. Use Value: Negative-going VCC transient immunity (up to 35µs at 100mV overdrive) prevents spurious resets during switching noise; 4-pin SC70 footprint saves board area vs. legacy SO-8 solutions. | Use Scenario: Automotive body control module (BCM) requiring AEC-Q100 compliance and robust brownout recovery. IC Role / Device Role / Timing Role: Monitors 5.0V system rail and delivers active-high reset to Infineon Aurix TC3xx, with MR supporting diagnostic mode entry via CAN command. Use Value: Guaranteed operation to +125°C and 2.10V threshold tolerance ensure reliable reset under cold-crank and hot-soak conditions; MR debounce eliminates contact bounce issues in mechanical service switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 2.93V reset threshold, 240ms timeout, no MR input, 3-pin SOT23 package | Lacks manual reset capability and offers higher threshold - suitable only for fixed 3.3V systems without user-initiated reset needs | Select when cost-sensitive, single-threshold 3.3V applications require smallest footprint and MR is unnecessary |
| TPS3808G33DBVR | 3.3V threshold, 200ms timeout, active-low open-drain output, 5-pin SOT23 package | Requires external pullup; incompatible logic polarity; no MR debounce - demands additional layout and firmware adaptation | Choose only if existing design uses open-drain reset architecture and 3.3V rail monitoring is mandatory |
Compared with MAX809TRD3-T and TPS3808G33DBVR, the MAX6385XS21D6-T uniquely combines 2.10V precision threshold, active-high push-pull output, debounced MR, and ultra-low 3μA supply current in a 4-pin SC70 - making it optimal for next-generation low-voltage, space-constrained, and user-serviceable embedded systems.
Availability
MAX6385XS21D6-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, controllers, and critical μP/μC systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6385XS21D6-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 computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space- and energy-constrained embedded systems where reliability, small size, and guaranteed timing are critical.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS21D6-T?
The MAX6385XS21D6-T has a factory-set reset threshold of 2.10V with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This value is specified in the Reset Thresholds table of the datasheet (suffix "21"), and the tolerance is guaranteed by design across temperature and process variation - not just typical or room-temperature only.
Does MAX6385XS21D6-T support manual reset, and how is it implemented?
Yes, MAX6385XS21D6-T includes a debounced manual reset input (MR) on pin 4. It is active-low, internally pulled up to VCC via a 63kΩ resistor, and accepts TTL/CMOS logic levels. A logic-low pulse ≥1µs forces reset assertion for the full 560ms timeout period, eliminating need for external debounce circuitry or pullup resistors.
What package type and dimensions does MAX6385XS21D6-T use?
MAX6385XS21D6-T is supplied in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098). Its footprint measures 2.0mm × 2.1mm with a maximum height of 0.95mm, and the recommended land pattern is 90-0187 - optimized for reflow soldering and high-density PCB assembly.
Can MAX6385XS21D6-T operate reliably at VCC = 1.2V?
Yes, MAX6385XS21D6-T guarantees correct reset output logic state down to VCC = 1V. At 1.2V, the device remains fully functional: the 2.10V threshold comparator operates, the 560ms timeout timer runs, and the active-high push-pull RESET output maintains valid high/low states - enabling safe operation in ultra-low-voltage brownout scenarios.
Is MAX6385XS21D6-T pin-compatible with any legacy Maxim reset ICs?
MAX6385XS21D6-T is pin-compatible with other 4-pin SC70 variants in the MAX6384–MAX6390 family (e.g., MAX6384XS21D6-T, MAX6386XS21D6-T) but not with 3-pin or 6-pin versions. It shares the same SC70 pinout as MAX6384/MAX6386/MAX6390 - VCC (1), RESET (2), GND (3), MR (4) - enabling drop-in replacement within this specific variant group.
MAX6385XS21D6-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:
- 2.1V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS21D6-T FAQ
1.How can I place an order for MAX6385XS21D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS21D6-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 MAX6385XS21D6-T reliable?
The price and inventory of MAX6385XS21D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS21D6-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS21D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS21D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS21D6-T?
MAX6385XS21D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS21D6-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 MAX6385XS21D6-T?
For technical support, including MAX6385XS21D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS21D6-T requirements.
6.How does Aetrix verify that MAX6385XS21D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS21D6-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 MAX6385XS21D6-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS21D6-T?
All MAX6385XS21D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS21D6-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 MAX6385XS21D6-T part is unused and in its original packaging.
Return procedure for MAX6385XS21D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6385XS21D6-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…
