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Analog Devices Inc./Maxim Integrated MAX6385XS19D5-T
- Part No.:
- MAX6385XS19D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS19D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,604
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Product details
Overview
The MAX6385XS19D5-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit designed to monitor +1.9V supply rails in space-constrained embedded systems. It features a factory-set 1.9V reset threshold (±2.5% over −40°C to +125°C), 280ms minimum VCC reset timeout, and consumes only 3μA at +1.8V. It is used in battery-powered controllers and portable instrumentation to ensure reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS19D5-T datasheet, MAX6385XS19D5-T pinout, MAX6385XS19D5-T application, or MAX6385XS19D5-T equivalent, key selection criteria include its 4-pin SC70 package, manual reset input with internal pullup, guaranteed reset validity down to VCC = 1V, and compatibility with dual-voltage monitoring architectures requiring auxiliary reset capability.
Technical Context
This device implements a precision bandgap-based voltage comparator for VCC monitoring, paired with a digital timeout counter that holds the active-high RESET output asserted for ≥280ms after VCC rises above 1.9V. The internal MR input includes a 63kΩ pullup resistor and supports TTL/CMOS logic levels, enabling direct connection to momentary switches without external debounce.
Unlike open-drain variants, the MAX6385XS19D5-T uses a push-pull output stage capable of sourcing ≥500µA at VCC ≥ 2.5V and sinking ≥1.2mA - eliminating need for external pullups while ensuring fast, rail-to-rail reset signaling in mixed-voltage microcontroller interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.90V nominal (±2.5% over −40°C to +125°C); ensures accurate detection of 1.8V system rail brownout |
| VCC Reset Timeout | 280ms minimum; guarantees μP remains held in reset long enough for stable clock and supply settling |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V; allows valid reset assertion even during deep brownout down to 1V VCC |
| Reset Output Type | Active-high push-pull; drives high without external components, compatible with most μP reset inputs |
| Manual Reset Input | MR with 63kΩ internal pullup; supports direct switch-to-GND interface with no external parts |
| Package | 4-pin SC70 (X4+1 outline); occupies <0.8 mm² PCB area, suitable for ultra-compact wearables |
Pinout & Package
MAX6385XS19D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for high-density PCB layouts with thermal resistance θJA = 322.6°C/W on multilayer boards.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and monitored voltage rail; must be decoupled with 0.1µF capacitor near pin |
| 2 | RESET | Active-high push-pull reset output; asserts high during fault and remains high for 280ms post-recovery |
| 3 | GND | Ground reference for all internal comparators and output driver; requires low-impedance connection to system ground plane |
| 4 | MR | Active-low manual reset input; pulling low forces immediate reset; internally pulled up to VCC (63kΩ) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.9V threshold | Eliminates external resistor divider, reducing BOM count and layout area in 1.8V systems |
| 280ms guaranteed reset timeout | Meets JEDEC JESD8-12E timing requirements for 32-bit ARM Cortex-M boot sequences |
| 3μA supply current at 1.8V | Extends battery life in always-on sensor nodes beyond 10 years with CR2032 cell |
| MR input with 63kΩ internal pullup | Enables single-switch reset implementation without pullup resistor or debounce RC network |
| Valid reset output down to VCC = 1V | Prevents spurious release during slow power-down, critical for nonvolatile memory write integrity |
Applications
| Battery-Powered Portable Instruments | Industrial Controller Power Monitoring |
|---|---|
Use Scenario: Handheld multimeter with Li-ion battery and 1.8V MCU core. IC Role / Device Role / Timing Role: Monitors main 1.8V rail and asserts active-high RESET during battery sag or cold-start. Use Value: Prevents firmware corruption by holding MCU in reset until regulated 1.8V rail stabilizes for ≥280ms. | Use Scenario: PLC I/O module with isolated 1.8V logic supply and field-side 24V bus. IC Role / Device Role / Timing Role: Supervises 1.8V VCC and provides manual reset via front-panel button. Use Value: Ensures deterministic restart after watchdog timeout or operator-initiated recovery without PCB redesign. |
| Dual-Voltage Embedded Systems | Low-Power IoT Edge Node |
Use Scenario: Wearable health monitor with separate 1.8V core and 3.3V sensor interface rails. IC Role / Device Role / Timing Role: Primary VCC supervisor for 1.8V domain; MR input synchronized with system-level reset controller. Use Value: Guarantees coordinated reset sequencing between voltage domains using single compact SC70 device. | Use Scenario: Wireless temperature node powered by coin cell, transmitting every 5 minutes. IC Role / Device Role / Timing Role: Low-current supervisor enabling >10-year battery life while maintaining reset reliability. Use Value: 3μA quiescent current directly extends operational lifetime without compromising brownout immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar μP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS19D3-T | Same 1.9V threshold and MR input, but 140ms reset timeout (vs. 280ms) | Suitable for faster-booting MCUs with shorter initialization sequences | Select when system boot time requires shorter reset hold duration |
| TPS3123QDBVRQ1 | Automotive-grade 1.9V supervisor with 200ms timeout; 1.8V–6V operating range; AEC-Q100 qualified | Designed for automotive body electronics where qualification and extended temp range are mandatory | Choose for automotive applications requiring AEC-Q100 compliance and higher ESD robustness |
Compared with MAX6385XS19D3-T, the MAX6385XS19D5-T provides double the reset timeout for systems needing longer stabilization periods; versus TPS3123QDBVRQ1, it offers lower quiescent current (3μA vs. 8μA) and smaller SC70 footprint but lacks automotive qualification.
Availability
MAX6385XS19D5-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial controllers, and low-power IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS19D5-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 power, sensing, and connectivity in demanding industrial, medical, and consumer applications.
The MAX6381–MAX6390 family delivers ultra-low-power, pin-compatible μP reset supervisors targeting battery-operated and space-constrained embedded systems requiring high accuracy and guaranteed timing behavior.
FAQ
What is the exact reset threshold voltage of the MAX6385XS19D5-T?
The MAX6385XS19D5-T has a factory-set nominal reset threshold of 1.90V, with tolerance of ±2.5% over the full operating temperature range (−40°C to +125°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table under "VCC Reset Threshold (VTH)". It is designed specifically for reliable supervision of 1.8V logic rails.
Does the MAX6385XS19D5-T support manual reset functionality?
Yes, the MAX6385XS19D5-T includes an active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, and the device holds RESET high for the full 280ms timeout after MR is released. No external components are required for basic switch-based reset implementation.
What package type and footprint does the MAX6385XS19D5-T use?
The MAX6385XS19D5-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), designated by package code X4+1. It measures 1.3mm × 1.1mm with 0.65mm pitch, offering minimal PCB area consumption ideal for wearables and miniature sensors.
Is the MAX6385XS19D5-T compatible with 1.0V supply operation?
Yes, the MAX6385XS19D5-T operates over an input voltage range of 1.0V to 5.5V and guarantees correct reset output logic state down to VCC = 1.0V. This ensures robust behavior during deep brownout conditions, preserving system integrity in ultra-low-voltage applications such as energy-harvesting nodes.
How does the reset timeout of the MAX6385XS19D5-T compare to other members of the MAX6381–MAX6390 family?
The MAX6385XS19D5-T provides a 280ms minimum reset timeout (suffix D5), distinct from shorter options like D3 (140ms) or longer ones like D4 (1120ms) and D7 (1200ms). This value is fixed per part number and selected at order time - D5 is optimized for mid-range boot sequences in 1.8V microcontroller systems.
MAX6385XS19D5-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:
- 1.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS19D5-T FAQ
1.How can I place an order for MAX6385XS19D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS19D5-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 MAX6385XS19D5-T reliable?
The price and inventory of MAX6385XS19D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS19D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS19D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS19D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS19D5-T?
MAX6385XS19D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS19D5-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 MAX6385XS19D5-T?
For technical support, including MAX6385XS19D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS19D5-T requirements.
6.How does Aetrix verify that MAX6385XS19D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS19D5-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 MAX6385XS19D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS19D5-T?
All MAX6385XS19D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS19D5-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 MAX6385XS19D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS19D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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