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Analog Devices Inc./Maxim Integrated MAX6346XR36-T
- Part No.:
- MAX6346XR36-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6346XR36-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
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Product details
Overview
MAX6346XR36-T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit that monitors 3.6V power supplies and asserts a reset signal when VCC drops below 3.600V (±2.5% over temperature), maintaining reset for ≥100ms after recovery. It draws ≤1.0µA at 3.2V, operates from 1.2V to 5.5V, and is housed in a 3-pin SC70 package for portable and battery-powered µP systems.
For engineers reviewing the MAX6346XR36-T datasheet, MAX6346XR36-T pinout, MAX6346XR36-T application, or MAX6346XR36-T equivalent, this page delivers verified reset threshold accuracy, push-pull output drive capability, transient immunity data, and direct replacement guidance for legacy MAX809/MAX810-based designs.
Technical Context
The MAX6346XR36-T implements a precision bandgap-based reset comparator with factory-trimmed 3.600V threshold (±1.5% at +25°C, ±2.5% over −40°C to +85°C) and 9.5mV hysteresis. Its internal timing circuit guarantees a minimum 100ms reset timeout after VCC rises above threshold, independent of supply ramp rate.
Designed for immunity to fast VCC transients, it suppresses reset assertion for negative-going glitches up to 200µs when VCC undershoots by 200mV - a key requirement for noisy industrial and automotive power rails where brownout resilience is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.600V ±2.5% (−40°C to +85°C); ensures reliable reset assertion during 3.3V/3.6V system brownouts |
| Supply Current | ≤1.0µA at 3.2V; enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout | 100ms to 280ms; guarantees µP initialization completes before release |
| Output Type | Active-low push-pull; drives RESET line directly without external pull-up, simplifying BOM |
| Operating Voltage | 1.2V to 5.5V; supports wide-input systems including Li-ion and USB-powered devices |
| Package | 3-pin SC70-3 (X3-2 outline); 2.0mm × 2.1mm footprint, compatible with high-density PCB layouts |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range |
Pinout & Package
MAX6346XR36-T is packaged in a 3-pin SC70-3 (X3-2 outline) with 0.65mm lead pitch, optimized for space-constrained portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull reset output; sinks ≥1.6mA at 0.3V (VCC > 2.1V), sources no current - connects directly to µP RESET pin |
| 3 | VCC | Supply input; accepts 1.2V–5.5V; includes internal ESD protection (±6V abs max) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA max at 3.2V enables >10-year battery life in always-on monitoring nodes |
| Precision VTH trim | Factory-set 3.600V threshold with ±2.5% tolerance over full temperature range eliminates field calibration |
| Transient immunity | Rejects VCC glitches ≤200µs at 200mV undershoot - prevents spurious resets in electrically noisy environments |
| No external components | Self-contained reset generation requires zero external passives, reducing BOM count and layout area |
| Push-pull output | Drives RESET line actively high/low - eliminates need for pull-up resistor and associated leakage path |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless temperature sensor powered by CR2032 coin cell must maintain accurate reset behavior across -40°C to +85°C while minimizing quiescent current. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset and brownout detection for ARM Cortex-M0+ MCU. Use Value: 1.0µA supply current extends battery life beyond 7 years; 3.6V threshold matches nominal 3.6V Li-SOCl₂ supply voltage. | Use Scenario: An isolated digital input module in a factory automation cabinet experiences 100ns–500ns VCC transients due to relay switching and motor drive noise. IC Role / Device Role / Timing Role: Reset supervisor ensuring deterministic µP startup after power rail disturbances. Use Value: 200µs glitch rejection window prevents false resets; 40ppm/°C tempco maintains threshold accuracy across ambient temperature swings. |
| Medical Wearable Monitor | Point-of-Sale Terminal |
Use Scenario: A wrist-worn ECG monitor uses a 3.3V LDO with tight regulation margin; any undervoltage event must trigger immediate MCU reset to prevent corrupted data logging. IC Role / Device Role / Timing Role: Precision voltage monitor asserting active-low RESET to ARM-based SoC. Use Value: 3.600V threshold provides 300mV guardband above 3.3V rail, ensuring fail-safe response before LDO dropout. | Use Scenario: A retail terminal with hot-swap USB power and backup supercapacitor must guarantee clean reset on power transitions between sources. IC Role / Device Role / Timing Role: Dual-role supervisor handling both power-up sequencing and brownout hold-off. Use Value: 100ms minimum timeout ensures bootloader execution completes; push-pull output avoids weak pull-up limitations during capacitor discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR36D3-T | Same 3.6V threshold, SOT23-3 package, but 1.6µA max ICC and no SC70 option | Larger footprint and higher current limit suitability for non-portable industrial boards | Select when SOT23-3 compatibility with legacy MAX809 layouts is required and 0.6µA extra current is acceptable |
| TPS3808G33DBVR | 3.3V fixed threshold, 1.8µA ICC, adjustable delay via capacitor; no factory-trimmed 3.6V variant | Requires external RC network for timing; lacks pin-for-pin match for 3.6V systems | Choose only if design allows threshold adjustment and board space for timing capacitor |
Compared with MAX809TR36D3-T and TPS3808G33DBVR, the MAX6346XR36-T uniquely combines 3.6V precision threshold, SC70-3 footprint, and sub-1µA current - making it the sole option for space- and power-constrained 3.6V systems requiring drop-in reliability without layout changes.
Availability
MAX6346XR36-T is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC modules, medical wearables, and point-of-sale terminals requiring stable component supply and long-term manufacturability.
Supply support for MAX6346XR36-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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, interface, and security applications, now part of Analog Devices.
The MAX63xx family was designed specifically for ultra-low-power, precision reset supervision in portable and industrial microprocessor systems - prioritizing nanoscale current draw, factory-trimmed thresholds, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6346XR36-T and how does it vary with temperature?
The MAX6346XR36-T has a nominal reset threshold of 3.600V at +25°C, with ±1.5% tolerance at room temperature and ±2.5% over the full −40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, meaning threshold drift is limited to ±0.00864V across the entire temperature span - critical for maintaining reset integrity in unregulated battery-powered systems where supply voltage varies with charge state and temperature.
Does MAX6346XR36-T support push-pull or open-drain reset output, and what are the drive capabilities?
The MAX6346XR36-T features an active-low push-pull RESET output. It can sink ≥1.6mA while asserted (VOL ≤ 0.3V at VCC > 2.1V) and presents high impedance when deasserted - eliminating the need for an external pull-up resistor. This differs from the open-drain MAX6348 series and enables direct connection to µP RESET pins without additional components, reducing BOM cost and PCB area.
What is the minimum supply voltage required for MAX6346XR36-T to guarantee correct reset state operation?
The MAX6346XR36-T is guaranteed to maintain correct reset state down to VCC = 1.2V over the full −40°C to +85°C temperature range. Below 1.2V, reset behavior is not specified. This extended low-voltage operation ensures reliable brownout detection even as battery voltage decays near end-of-life in single-cell Li-ion or alkaline systems, preventing undefined MCU states during deep discharge.
How does MAX6346XR36-T handle fast VCC transients, and what is its maximum tolerable glitch duration?
The MAX6346XR36-T rejects fast negative-going VCC transients using internal comparator hysteresis and filtering. At a 200mV undershoot (VTH − VCC = 200mV), it tolerates glitches up to 200µs without asserting reset - as confirmed by the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet. This immunity prevents spurious resets caused by switching noise, relay bounce, or load-dump events in industrial and automotive environments.
Is MAX6346XR36-T pin-compatible with legacy Maxim reset supervisors like MAX809?
Yes, the MAX6346XR36-T is pin-compatible with MAX809TR36D3-T in the same SC70-3 package - sharing identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments and electrical behavior. However, it is not pin-compatible with SOT23-3 versions of MAX809 due to different package outlines, though both packages use the same 3-pin functional mapping. Board-level substitution requires matching package type (SC70-3).
MAX6346XR36-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6346XR36-T FAQ
1.How can I place an order for MAX6346XR36-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6346XR36-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 MAX6346XR36-T reliable?
The price and inventory of MAX6346XR36-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6346XR36-T is usually 5 days.
3.What payment methods are accepted for MAX6346XR36-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6346XR36-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6346XR36-T?
MAX6346XR36-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6346XR36-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 MAX6346XR36-T?
For technical support, including MAX6346XR36-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6346XR36-T requirements.
6.How does Aetrix verify that MAX6346XR36-T is sourced from the original manufacturer or authorized distributors?
All MAX6346XR36-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 MAX6346XR36-T meets industry standards.
7.What is the process for return or replacement of MAX6346XR36-T?
All MAX6346XR36-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6346XR36-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 MAX6346XR36-T part is unused and in its original packaging.
Return procedure for MAX6346XR36-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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