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Analog Devices Inc./Maxim Integrated MAX6335US20D3+T
- Part No.:
- MAX6335US20D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US20D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
MAX6335US20D3+T from Maxim Integrated is an ultra-low-voltage, push/pull active-high microprocessor supervisory circuit in a 4-pin SOT143 package. It monitors 1.8V–3.3V power supplies, asserts reset when VCC falls below 2.00V (±2% over temperature), and maintains reset for ≥100ms after recovery. It features 0.7V minimum operating voltage, 3.3µA supply current, and debounced manual-reset input - used in portable equipment and automotive controllers requiring reliable brownout detection.
For engineers reviewing the MAX6335US20D3+T datasheet, MAX6335US20D3+T pinout, MAX6335US20D3+T application, or MAX6335US20D3+T equivalent, key selection criteria include its active-high RESET output, factory-trimmed 2.00V threshold, guaranteed operation down to VCC = 0.7V, 100ms reset timeout, and compatibility with space-constrained embedded systems.
Technical Context
The MAX6335US20D3+T implements a precision bandgap-based reset comparator with ±1.8% room-temperature accuracy and ±3% tolerance over –40°C to +125°C. Its internal 20kΩ MR pull-up enables direct switch connection without external components, and reset propagation delay is ≤24µs during VCC fall at 10V/ms.
It uses a fixed 100ms minimum reset timeout period (D3 suffix) and guarantees valid RESET output down to VCC = 0.7V. The push/pull output drives high with VOH ≥0.8VCC (ISOURCE = 200µA, VCC ≥1.8V) and low with VOL ≤0.3V (ISINK = 500µA, VCC ≥1.8V), eliminating need for external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±2% (typical), factory-trimmed for 1.8V system monitoring with tight tolerance |
| Reset Timeout Period | ≥100ms - ensures full µP initialization before release in battery-powered systems |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and enables use with Li-ion or coin-cell backup |
| Supply Current | 3.3µA at VCC = 2.5V - minimizes quiescent drain in always-on monitoring applications |
| Output Type | Push/pull active-high RESET - eliminates external pull-up resistor and simplifies interface to CMOS inputs |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| MR Input Threshold | 0.5V (max) - ensures reliable assertion with mechanical switches or logic-level signals |
Pinout & Package
MAX6335US20D3+T is housed in a lead-free 4-pin SOT143 package (3.0mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts. Pin 1 is VCC, Pin 2 is RESET (active-high push/pull), Pin 3 is MR (manual reset input), and Pin 4 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VCC | Power supply input | Accepts 0.7V–5.5V; powers internal comparator and output stage; must be decoupled near pin |
| 2: RESET | Active-high reset output | Drives high during reset assertion; sinks current when deasserted; interfaces directly to µP reset input |
| 3: MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pull-up allows floating if unused; debounced internally |
| 4: GND | Ground reference | Return path for VCC, RESET, and MR; requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating voltage | Enables reset assertion even during severe brownout, ensuring µP remains held until stable VCC returns |
| Factory-trimmed 2.00V reset threshold | Matches 1.8V core supply with margin; eliminates external resistor network and calibration effort |
| 100ms minimum reset timeout (D3) | Guarantees sufficient hold time for slow-starting peripherals and flash memory initialization sequences |
| Debounced manual-reset input | Removes need for RC filter or firmware debounce, reducing BOM count and board area |
| 4-pin SOT143 footprint | Pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 - enables drop-in replacement in legacy designs |
Applications
| Portable Medical Devices | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters require reliable reset during Li-ion voltage sag. IC Role / Device Role / Timing Role: Supervises main 1.8V rail and asserts active-high RESET to hold MCU until VCC recovers above 2.00V. Use Value: 0.7V minimum operating voltage ensures reset remains asserted through deep discharge; 3.3µA ICC extends battery life. |
Use Scenario: Under-hood ECUs monitor 2.5V sensor supply rails subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides brownout detection and 100ms reset hold to prevent MCU corruption during engine start. Use Value: –40°C to +125°C rating and ±3% threshold stability ensure consistent behavior across automotive temperature extremes. |
| Industrial PLC I/O Modules | Smart Energy Meters |
|
Use Scenario: DIN-rail mounted I/O modules operate from unregulated 3.3V DC-DC outputs with ripple and step-load variation. IC Role / Device Role / Timing Role: Monitors VCC and generates clean, glitch-immune reset signal using internal comparator with transient immunity. Use Value: 24µs max propagation delay and built-in noise rejection prevent false resets from switching regulator noise. |
Use Scenario: Meters with real-time clocks and metrology ICs require deterministic reset timing during AC power loss and capacitor hold-up decay. IC Role / Device Role / Timing Role: Active-high RESET output directly drives µP reset pin while maintaining validity down to 0.7V VCC. Use Value: Push/pull output eliminates external pull-up, reducing component count and improving reliability in long-life meter deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6336US20D3+T | Active-low push/pull RESET output; identical threshold, timeout, and supply specs | Requires inverted reset logic on µP side or level-shifting; not suitable for direct replacement where active-high is mandated | Select when target µP accepts active-low reset and board layout already accommodates pull-down or open-drain topology |
| MAX6315US20D3+T | Same 2.00V threshold and 100ms timeout, but operates down to 1.0V VCC and lacks 0.7V guarantee | Not rated for sub-1.0V brownout hold; unsuitable for ultra-low-voltage backup scenarios | Choose only if system VCC never drops below 1.0V and cost sensitivity outweighs extended low-VCC coverage |
Compared with MAX6335US20D3+T, MAX6336US20D3+T offers identical supervision accuracy and timing but requires µP-level logic inversion, while MAX6315US20D3+T sacrifices 0.7V operation for lower cost - making MAX6335US20D3+T optimal for deep-brownout resilience in portable and automotive systems.
Availability
MAX6335US20D3+T is available at Aetrix Electronics and suitable for portable medical devices, automotive body control modules, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MAX6335US20D3+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 interface applications, with emphasis on high-reliability industrial and automotive markets.
The MAX6335 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for ultra-low-voltage, low-power reset monitoring in battery-backed and harsh-environment systems.
FAQ
What is the exact reset threshold voltage of MAX6335US20D3+T?
The MAX6335US20D3+T has a factory-trimmed nominal reset threshold of 2.00V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "US20" suffix variant of MAX6335US20D3+T.
Does MAX6335US20D3+T support operation below 1.0V VCC?
Yes, MAX6335US20D3+T is guaranteed to function correctly down to VCC = 0.7V, including valid RESET output assertion and deassertion. This capability is explicitly specified for MAX6335/MAX6336 variants and distinguishes them from MAX6337 (1.0V min) and MAX6315 (1.0V min).
What is the reset timeout period for MAX6335US20D3+T?
The "D3" suffix in MAX6335US20D3+T indicates a factory-programmed minimum reset timeout period of 100ms. Electrical Characteristics table confirms tRP = 100ms (min), 150ms (typ), and 200ms (max) across temperature, ensuring robust hold time for complex µP boot sequences.
Is MAX6335US20D3+T pin-compatible with other supervisory ICs?
Yes, MAX6335US20D3+T uses the standard 4-pin SOT143 package and is explicitly stated as pin compatible with MAX811/MAX812 and MAX6314/MAX6315. Pin 1 (VCC), Pin 2 (RESET), Pin 3 (MR), and Pin 4 (GND) match these families, enabling direct PCB replacement where functional requirements align.
What is the supply current consumption of MAX6335US20D3+T at 1.8V VCC?
At VCC = 1.8V and TA = +25°C, MAX6335US20D3+T draws 3.0µA (min) to 6.0µA (max) supply current, with typical ICC = 3.3µA. This ultra-low quiescent current is measured with no load and RESET not asserted, supporting multi-year battery life in always-on monitoring applications.
MAX6335US20D3+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:
- 2V
- 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
MAX6335US20D3+T FAQ
1.How can I place an order for MAX6335US20D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US20D3+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 MAX6335US20D3+T reliable?
The price and inventory of MAX6335US20D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US20D3+T is usually 5 days.
3.What payment methods are accepted for MAX6335US20D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US20D3+T transactions.
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4.How is shipping managed for MAX6335US20D3+T?
MAX6335US20D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US20D3+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 MAX6335US20D3+T?
For technical support, including MAX6335US20D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US20D3+T requirements.
6.How does Aetrix verify that MAX6335US20D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6335US20D3+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 MAX6335US20D3+T meets industry standards.
7.What is the process for return or replacement of MAX6335US20D3+T?
All MAX6335US20D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US20D3+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 MAX6335US20D3+T part is unused and in its original packaging.
Return procedure for MAX6335US20D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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