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Analog Devices Inc./Maxim Integrated MAX6336US18D3+T
- Part No.:
- MAX6336US18D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6336US18D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,746
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Product details
Overview
MAX6336US18D3+T from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit designed for 1.8V power supply monitoring in space-constrained embedded systems. It asserts reset when VCC drops below 1.80V (±1.8% at +25°C, ±3% over -40°C to +125°C), provides 100ms minimum reset timeout, operates down to 0.7V supply, and draws only 3.3µA at 2.5V - enabling reliable brownout detection in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6336US18D3+T datasheet, MAX6336US18D3+T pinout, MAX6336US18D3+T application, or MAX6336US18D3+T equivalent, key selection criteria include guaranteed RESET validity to VCC = 0.7V, factory-trimmed 1.8V threshold with 100mV increment options, SOT143 pin compatibility with MAX811/MAX812, and manual-reset debouncing without external components.
Technical Context
The MAX6336US18D3+T implements a precision bandgap-based voltage comparator with factory-trimmed 1.80V reset threshold and built-in hysteresis to reject fast transients on VCC. Its internal timing circuit generates a fixed 100ms minimum reset pulse width after VCC recovery or MR deassertion, independent of supply voltage variation.
It features a debounced manual-reset input (MR) with 20kΩ internal pull-up, allowing direct connection of a momentary switch to GND. The push/pull RESET output drives low actively and high via internal transistor, ensuring defined logic levels across the full 0.7V–5.5V VCC range without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.80V ±1.8% (25°C), ±3% (-40°C to +125°C); ensures accurate 1.8V rail supervision with minimal false triggers |
| Reset Timeout Period | 100ms minimum; guarantees sufficient processor initialization time after power recovery or manual reset |
| Supply Voltage Range | 0.7V to 5.5V; supports operation during deep brownout and enables use with ultra-low-voltage logic |
| Supply Current | 3.3µA typical at 2.5V; minimizes quiescent drain in always-on battery-backed monitoring circuits |
| RESET Output Type | Push/pull active-low; eliminates need for external pull-up resistor and ensures valid logic levels at VCC ≥ 0.7V |
| MR Input Threshold | 0.5V max (VIL), 0.8VCC min (VIH); compatible with 1.8V CMOS logic and tolerant of slow-rising reset signals |
| Operating Temperature | -40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6336US18D3+T is housed in a 4-pin SOT143 package (3.0mm × 1.6mm × 1.1mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane for stable reset threshold accuracy |
| 2: RESET | Active-low reset output | Push/pull driver asserts low during VCC undervoltage or MR assertion; remains low for ≥100ms after recovery |
| 3: MR | Manual reset input | Logic-low signal (≤0.5V) initiates reset; internally pulled up to VCC (20kΩ); requires no external debounce circuitry |
| 4: VCC | Power supply input | Monitored supply rail; device functions correctly down to 0.7V, enabling early brownout detection before µP fails |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V threshold | 1.80V ±1.8% at +25°C ensures precise match to 1.8V core supplies without calibration |
| 100ms reset timeout | Guaranteed minimum pulse width meets boot-time requirements of ARM Cortex-M0/M3 and similar MCUs |
| 0.7V operating minimum | Enables supervision during severe brownout conditions where other supervisors cease operation |
| Debounced MR input | Eliminates need for RC filter or firmware debounce, reducing BOM count and layout area |
| SOT143 footprint | 4-pin, 3.0×1.6mm package saves >60% board space vs. SO-8 alternatives while maintaining thermal reliability |
Applications
| Industrial PLC I/O Modules | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Remote sensor nodes powered by Li-SOCl₂ cells experience gradual voltage decay over years; supervisor must detect 1.8V rail collapse before MCU data corruption occurs. IC Role / Device Role / Timing Role: Primary brownout detector asserting active-low RESET to halt CPU execution and preserve SRAM integrity until safe shutdown. Use Value: 0.7V operational floor allows detection 1.1V earlier than 1.8V-threshold competitors, extending usable battery life by up to 12% in field deployments. |
Use Scenario: Portable environmental monitors operate intermittently on coin-cell batteries; µP wakes every 10 minutes but must reset reliably if supply sags during RF transmission. IC Role / Device Role / Timing Role: Standby-mode supervisor providing deterministic 100ms reset hold time after wake-up supply dip, preventing partial instruction execution. Use Value: 3.3µA supply current reduces average system quiescent draw by 40% versus legacy 10µA supervisors, extending log interval from 6 to 10 months. |
| Automotive Body Control Units | Medical Handheld Diagnostics |
|
Use Scenario: BCMs endure load-dump transients and cold-crank voltage dips; reset circuit must distinguish true brownout from sub-10µs noise spikes on 1.8V domain. IC Role / Device Role / Timing Role: Immune voltage monitor rejecting <20µs transients at 100mV overdrive, ensuring no spurious resets during engine start. Use Value: Built-in transient immunity eliminates need for external RC filtering, reducing component count and qualification testing effort. |
Use Scenario: FDA-cleared handheld analyzers require fail-safe power sequencing: µP must not execute code unless 1.8V LDO output is fully regulated and stable. IC Role / Device Role / Timing Role: Power-on reset generator with 100ms timeout guaranteeing LDO output settling before bootloader activation. Use Value: Factory-trimmed 1.80V threshold matches LDO tolerance band exactly, avoiding marginal reset assertion that could cause field-reported boot failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS+T | 1.6V reset threshold, 20ms timeout, same SOT143 package and push/pull output | Shorter timeout limits use in MCUs requiring >50ms initialization; better suited for simple 8-bit controllers | Select when 1.6V threshold aligns with 1.6–1.7V supply rails and faster reset release is acceptable |
| TPS3808G18DBVR | 1.8V threshold, 200ms timeout, open-drain output, higher 8µA ICC | Open-drain output requires external pull-up; longer timeout suits complex SoCs but increases boot latency | Choose when interfacing with bidirectional µP reset pins or when extended reset hold improves system robustness |
Compared with MAX811TEUS+T and TPS3808G18DBVR, the MAX6336US18D3+T uniquely combines 1.8V precision threshold, 100ms timeout, push/pull drive, and 0.7V operation - making it optimal for 1.8V-core MCUs in battery-critical and automotive-grade designs where both accuracy and ultra-low-voltage functionality are mandatory.
Availability
MAX6336US18D3+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered data loggers, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6336US18D3+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 expertise in power management and supervisory circuits.
The MAX633x family delivers ultra-low-voltage, low-power µP reset solutions targeting space-constrained, battery-operated, and high-reliability embedded systems requiring guaranteed operation down to 0.7V.
FAQ
What is the exact reset threshold voltage for MAX6336US18D3+T and how does it vary with temperature?
The MAX6336US18D3+T has a factory-trimmed nominal reset threshold of 1.80V. At +25°C, this is specified as 1.80V ±1.8% (1.766V to 1.834V). Over the full operating temperature range of -40°C to +125°C, the threshold varies by ±3%, resulting in a worst-case range of 1.746V to 1.854V. This tight tolerance ensures consistent 1.8V rail supervision without calibration.
Does MAX6336US18D3+T require an external pull-up resistor on the RESET pin?
No, MAX6336US18D3+T does not require an external pull-up resistor because it features a push/pull output stage. The internal driver actively pulls RESET high when deasserted, maintaining a valid logic-high level across the entire 0.7V–5.5V VCC range. This eliminates BOM cost and layout area associated with external resistors.
What is the minimum VCC voltage at which MAX6336US18D3+T guarantees correct RESET output behavior?
MAX6336US18D3+T guarantees correct RESET output behavior down to VCC = 0.7V. Both RESET assertion (low) and deassertion (high) are fully functional at this voltage, enabling reliable brownout detection earlier than most competing supervisors - a critical advantage in battery-powered systems approaching end-of-life.
How is the 100ms reset timeout period implemented in MAX6336US18D3+T?
The 100ms reset timeout in MAX6336US18D3+T is generated by an internal factory-programmed RC timing circuit. It is guaranteed to be ≥100ms after VCC rises above the 1.80V threshold or after the MR input is released. This fixed timeout is temperature-stable and supply-independent, ensuring predictable MCU initialization timing across all operating conditions.
Is MAX6336US18D3+T pin-compatible with other Maxim reset ICs?
Yes, MAX6336US18D3+T is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 in the SOT143 package. Pin 1 is GND, Pin 2 is RESET, Pin 3 is MR, and Pin 4 is VCC across all these devices - enabling drop-in replacement in existing designs without PCB modification, provided the reset threshold and timeout requirements align.
MAX6336US18D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.8V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6336US18D3+T FAQ
1.How can I place an order for MAX6336US18D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6336US18D3+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 MAX6336US18D3+T reliable?
The price and inventory of MAX6336US18D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6336US18D3+T is usually 5 days.
3.What payment methods are accepted for MAX6336US18D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6336US18D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6336US18D3+T?
MAX6336US18D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6336US18D3+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 MAX6336US18D3+T?
For technical support, including MAX6336US18D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6336US18D3+T requirements.
6.How does Aetrix verify that MAX6336US18D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6336US18D3+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 MAX6336US18D3+T meets industry standards.
7.What is the process for return or replacement of MAX6336US18D3+T?
All MAX6336US18D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6336US18D3+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 MAX6336US18D3+T part is unused and in its original packaging.
Return procedure for MAX6336US18D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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