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Analog Devices Inc./Maxim Integrated MAX6335US18D3-T
- Part No.:
- MAX6335US18D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US18D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,457
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Product details
Overview
The MAX6335US18D3-T from Maxim Integrated is a push/pull, active-high microprocessor supervisory circuit designed for 1.8V power supply monitoring in space-constrained embedded systems. It asserts a high-level RESET signal when VCC drops below 1.80V (±3% over temperature) or during manual reset, with a guaranteed 100ms minimum timeout and valid operation down to VCC = 0.7V. Used in portable equipment and automotive controllers for reliable brownout detection.
For engineers reviewing the MAX6335US18D3-T datasheet, MAX6335US18D3-T pinout, MAX6335US18D3-T application, or MAX6335US18D3-T equivalent, key selection criteria include its 1.8V reset threshold, 100ms timeout, SOT143-4 package, ultra-low 3.3µA supply current, and guaranteed RESET validity at VCC ≥ 0.7V.
Technical Context
This IC implements a precision voltage comparator with factory-trimmed 1.80V reset threshold (±1.8% at +25°C, ±3% over –40°C to +125°C), internal debounced manual-reset input (MR), and fixed 100ms reset timeout. The push/pull output drives high actively without external pull-up.
It features transient immunity up to 24µs at 10V/ms VCC fall rate, operates across –40°C to +125°C, and maintains functional RESET/RESET logic states down to 0.7V VCC-enabling robust reset assertion during deep brownout conditions before system collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.80V ±3% over –40°C to +125°C - ensures accurate 1.8V rail supervision with minimal false triggers |
| Reset Timeout | 100ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3.3µA typical at 1.8V - enables multi-year battery life in portable instrumentation |
| Operating VCC Range | 0.7V to 5.5V - supports operation through deep undervoltage events and wide-input systems |
| Output Type | Push/pull active-high - eliminates need for external pull-up resistor and simplifies µP interface |
| MR Glitch Immunity | 12ns - rejects noise on manual reset line without external filtering |
| Package | SOT143-4 - 1.3mm × 2.1mm footprint ideal for compact PCB layouts |
Pinout & Package
Supplied in a 4-pin SOT143 surface-mount package (1.3mm × 2.1mm, 0.95mm height), optimized for high-density PCBs and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for all internal circuitry; must be low-impedance connection to system ground plane |
| 2 - RESET | Active-high reset output | Drives high during reset assertion (VCC < 1.80V or MR low); sinks current when deasserted |
| 3 - MR | Manual reset input | Logic-low active; internally pulled up to VCC (20kΩ); accepts momentary switch to GND |
| 4 - VCC | Power supply input | Accepts 0.7V–5.5V; powers internal comparator, timer, and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.80V threshold | Eliminates external resistor dividers and calibration, reducing BOM count and layout area |
| 100ms fixed reset timeout | Meets boot-time requirements of ARM Cortex-M0/M3 and legacy 8-bit µCs without timing component variation |
| Debounced MR input | Removes need for RC filter or firmware debounce, saving board space and firmware cycles |
| 0.7V minimum operating voltage | Ensures deterministic reset behavior during severe brownout, preventing undefined µP state |
| 4-pin SOT143 package | Reduces PCB real estate by >50% vs. SO-8 alternatives while maintaining thermal performance |
Applications
| Battery-Powered Data Loggers | Automotive Body Control Modules |
|---|---|
Use Scenario: Long-term environmental sensor nodes powered by coin-cell batteries with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output supplying MCU and sensors; asserts RESET if battery sags below 1.8V during cold start. Use Value: Prevents corrupted flash writes and RAM corruption during undervoltage, extending field reliability beyond 10 years. | Use Scenario: Central body controller managing door locks, lighting, and window motors in 12V vehicle architecture. IC Role / Device Role / Timing Role: Supervises 1.8V domain powering CAN transceiver and microcontroller core logic during ignition cycling. Use Value: Guarantees clean reset at VCC = 0.7V during cranking-induced dips, avoiding CAN bus lockup or phantom module activation. |
| Industrial PLC I/O Modules | Medical Point-of-Care Devices |
Use Scenario: DIN-rail mounted analog input modules exposed to wide ambient temperatures (–40°C to +85°C). IC Role / Device Role / Timing Role: Provides temperature-stable 1.8V supply supervision for FPGA configuration memory and ADC reference buffers. Use Value: Maintains ±3% reset threshold accuracy across full industrial range, eliminating false resets during thermal cycling. | Use Scenario: Portable glucose meters and pulse oximeters requiring FDA-compliant power sequencing. IC Role / Device Role / Timing Role: Ensures deterministic MCU reset during battery insertion/removal and low-battery shutdown sequences. Use Value: Meets IEC 62304 Class B software safety requirements via hardware-enforced 100ms reset hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US18D3-T | Same 1.8V threshold and 100ms timeout, but uses SOT23-5 package with separate VCC and GND pins | Requires PCB redesign due to 5-pin layout and different pinout; lacks MR debounce circuitry | Select only if SOT23-5 footprint is already standardized and manual reset filtering is handled externally |
| TPS3808G18DBVR | 1.8V threshold, 200ms timeout, 1.8V–6V VCC range, but active-low open-drain output | Requires external pull-up and level-shifting for active-high µP interfaces; higher 8µA quiescent current | Prefer when longer timeout or wider VCC range is needed, and system design accommodates active-low signaling |
Compared with MAX6315US18D3-T and TPS3808G18DBVR, the MAX6335US18D3-T delivers active-high push/pull drive in a smaller 4-pin SOT143, lower 3.3µA supply current, and integrated MR debounce-reducing external components and PCB area without compromising industrial temperature support or reset accuracy.
Availability
MAX6335US18D3-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive body electronics, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6335US18D3-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 industrial, automotive, communications, and computing applications.
The MAX6335 series belongs to Maxim's µP supervisory product line, engineered specifically for ultra-low-voltage, low-power reset monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6335US18D3-T?
The MAX6335US18D3-T has a factory-trimmed nominal reset threshold of 1.80V, with tolerance of ±1.8% at +25°C and ±3% over the full operating temperature range of –40°C to +125°C. This value is verified per Table 1 in the official datasheet and applies specifically to the "US18" suffix variant of the MAX6335US18D3-T.
Does the MAX6335US18D3-T require an external pull-up resistor on the RESET pin?
No, the MAX6335US18D3-T does not require an external pull-up resistor because it features a push/pull output stage. Its active-high RESET pin drives high during assertion and actively pulls low when deasserted, eliminating reliance on external biasing components and simplifying interface to µPs with high-impedance reset inputs.
What is the minimum supply voltage at which the MAX6335US18D3-T guarantees correct RESET logic states?
The MAX6335US18D3-T guarantees correct RESET/RESET logic states down to VCC = 0.7V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during severe brownout conditions before the host µP loses functionality, a critical capability for fail-safe embedded systems.
How is manual reset implemented on the MAX6335US18D3-T, and is external debouncing needed?
The MAX6335US18D3-T includes an integrated debounced manual-reset input (MR) with a 20kΩ internal pull-up. A normally open momentary switch connected between MR and GND provides fully hardware-debounced reset initiation-no external RC network or firmware polling is required, reducing both component count and software complexity in the final design.
What package type and dimensions does the MAX6335US18D3-T use?
The MAX6335US18D3-T is packaged in a 4-pin SOT143 (also referenced as SOT-143 or SOT143-4), measuring 1.3mm × 2.1mm with 0.95mm height and 0.95mm pitch. This compact surface-mount outline is optimized for high-density PCB layouts and compatible with standard reflow soldering processes.
MAX6335US18D3-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:
- Obsolete
- 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 High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6335US18D3-T FAQ
1.How can I place an order for MAX6335US18D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US18D3-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 MAX6335US18D3-T reliable?
The price and inventory of MAX6335US18D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US18D3-T is usually 5 days.
3.What payment methods are accepted for MAX6335US18D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US18D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6335US18D3-T?
MAX6335US18D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US18D3-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 MAX6335US18D3-T?
For technical support, including MAX6335US18D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US18D3-T requirements.
6.How does Aetrix verify that MAX6335US18D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6335US18D3-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 MAX6335US18D3-T meets industry standards.
7.What is the process for return or replacement of MAX6335US18D3-T?
All MAX6335US18D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US18D3-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 MAX6335US18D3-T part is unused and in its original packaging.
Return procedure for MAX6335US18D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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