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Analog Devices Inc./Maxim Integrated MAX6335US23D3+
- Part No.:
- MAX6335US23D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US23D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
MAX6335US23D3+ 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 2.30V (±3% over temperature), provides 100ms minimum reset timeout, operates down to 0.7V supply, and draws only 3.3µA at 2.5V - used for reliable power-on/brownout reset in portable and automotive microcontroller systems.
For engineers reviewing the MAX6335US23D3+ datasheet, MAX6335US23D3+ pinout, MAX6335US23D3+ application, or MAX6335US23D3+ equivalent, key selection criteria include guaranteed RESET validity to VCC = 0.7V, factory-trimmed 2.30V threshold with ±3% tolerance over –40°C to +125°C, 100ms reset timeout, active-high push/pull output structure, and SOT143 footprint compatibility with MAX811/MAX812 and MAX6314/MAX6315.
Technical Context
The MAX6335US23D3+ implements a precision bandgap-based reset comparator with factory-trimmed 2.30V threshold (±1.8% at +25°C, ±3% over full temperature range) and built-in immunity to fast VCC transients (e.g., ≤24µs glitch rejection at 100mV overdrive). Its internal timing circuit delivers a guaranteed minimum 100ms reset pulse width after VCC recovery or MR deassertion.
It features a debounced manual-reset input (MR) with 20kΩ internal pull-up, requiring only a momentary switch to GND; no external RC network is needed. The push/pull RESET output sources up to 200µA at VCC ≥1.8V while asserted and sinks 500µA while deasserted, ensuring clean logic-level signaling into high-impedance µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V ±3% over –40°C to +125°C - ensures reliable brownout detection for 2.5V systems with margin |
| Reset Timeout | 100ms minimum - guarantees sufficient hold time for µP initialization and peripheral stabilization |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and enables use in 1.8V/2.5V/3.3V systems |
| Quiescent Current | 3.3µA at VCC = 2.5V - minimizes battery drain in always-on portable equipment |
| Output Type | Active-high push/pull - drives RESET high without external pull-up, simplifies interface to µP reset pins |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
| MR Input | Debounced with 20kΩ internal pull-up - eliminates need for external debounce components or firmware filtering |
Pinout & Package
Package: 4-pin SOT143 (1.3mm × 2.1mm, 0.95mm height), tape-and-reel compatible, available in lead-free (+T) variant.
| 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 < 2.30V or MR low); remains high for ≥100ms after recovery |
| 3 - MR | Manual reset input | Logic-low pulse ≥160µs asserts reset; internally pulled up to VCC (20kΩ), so open-circuit = inactive |
| 4 - VCC | Power supply input | Accepts 0.7V–5.5V; powers internal comparator, timer, and output stage; threshold sensing derived from this rail |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.30V threshold | Eliminates external resistor divider calibration and improves system voltage-monitoring accuracy across temperature |
| 100ms minimum reset timeout | Ensures µP and peripherals fully initialize before release, preventing race conditions in boot sequence |
| 0.7V minimum operating voltage | Guarantees valid RESET output even during severe brownout, enabling fail-safe shutdown sequencing |
| Debounced MR with internal pull-up | Reduces BOM count by removing external RC network and avoids firmware debounce overhead |
| Push/pull active-high output | Simplifies PCB layout by removing external pull-up resistor and ensures deterministic logic level at µP reset pin |
Applications
| Battery-Powered Portable Devices | Automotive Engine Control Units |
|---|---|
Use Scenario: Smart sensors and wearables powered by single-cell Li-ion batteries experiencing voltage sag during peak load. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-high RESET if voltage drops below 2.30V, holding reset for ≥100ms after recovery to prevent erratic MCU behavior. Use Value: Prevents corrupted memory writes and state machine lockup during transient brownout, extending device field reliability. | Use Scenario: ECU power rails exposed to load-dump and cold-crank transients in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Supervises 2.5V or 3.3V domain regulators; asserts RESET on undervoltage and maintains it for 100ms to ensure safe processor restart after cranking recovery. Use Value: Meets AEC-Q100 Grade 0 thermal requirements and prevents unsafe actuator activation during power instability. |
| Industrial Programmable Logic Controllers | Medical Diagnostic Handhelds |
Use Scenario: PLC I/O modules subjected to wide ambient temperature swings (–40°C to +85°C) and noisy 24V DC supplies. IC Role / Device Role / Timing Role: Provides precise 2.30V reset threshold with ±3% tolerance over full temperature range and immune to sub-24µs supply glitches. Use Value: Eliminates false resets caused by EMI or switching noise, improving system uptime and diagnostic integrity. | Use Scenario: Portable ultrasound or glucose meters using coin-cell batteries where quiescent current directly impacts battery life. IC Role / Device Role / Timing Role: Delivers 3.3µA supply current at 2.5V while guaranteeing 2.30V monitoring accuracy and 100ms reset hold time. Use Value: Extends battery service life beyond 12 months in standby mode without compromising reset reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS23+T | Same 2.3V threshold, 140ms reset timeout, active-low push/pull output, operates down to 0.8V | Requires level-shifting or µP with active-low reset input; not drop-in due to inverted output polarity | Select when active-low reset signaling is required and 140ms timeout is acceptable |
| MAX6315US23D3+ | Same 2.3V threshold, 100ms timeout, active-high push/pull, but rated only to +85°C (not +125°C) | Limited to commercial/industrial ambient; unsuitable for under-hood automotive or extended-temperature industrial use | Select for cost-sensitive consumer applications where full –40°C to +125°C qualification is unnecessary |
Compared with MAX811TEUS23+T and MAX6315US23D3+, the MAX6335US23D3+ uniquely combines active-high output, 100ms timeout, 0.7V operation, and full automotive-grade temperature range - making it optimal for space-constrained, high-reliability µP reset in harsh environments.
Availability
MAX6335US23D3+ is available at Aetrix Electronics and suitable for battery-powered portable devices, automotive engine control units, and industrial programmable logic controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned performance.
Supply support for MAX6335US23D3+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, communications, and computing applications.
The MAX6335 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for ultra-low-voltage, low-power reset supervision in space-constrained and thermally aggressive embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6335US23D3+ and how does it vary with temperature?
The MAX6335US23D3+ has a factory-trimmed nominal reset threshold of 2.30V, with ±1.8% variation at +25°C and ±3% over the full –40°C to +125°C operating range. This specification ensures consistent brownout detection across automotive and industrial temperature extremes without external calibration.
Does the MAX6335US23D3+ require external components to function as a complete reset supervisor?
No - the MAX6335US23D3+ requires zero external components. Its debounced MR input includes a 20kΩ internal pull-up, the reset timeout is factory-programmed to 100ms, and the active-high push/pull output drives directly into µP reset pins. Only VCC, GND, MR (optional), and RESET connections are needed.
Can the MAX6335US23D3+ operate reliably when the supply voltage drops below 1.0V?
Yes - the MAX6335US23D3+ is fully specified down to 0.7V VCC and guarantees valid RESET output (active-high) throughout that range. At VCC < 1.0V, its push/pull output maintains defined logic levels, unlike open-drain alternatives that drift indeterminate.
What is the purpose of the MR pin on the MAX6335US23D3+ and how should it be used?
The MR pin on the MAX6335US23D3+ is a debounced manual-reset input. A logic-low pulse ≥160µs asserts RESET; the pin has a 20kΩ internal pull-up, so it may be left unconnected if unused. For physical reset, connect a normally open momentary switch between MR and GND - no external RC network is required.
Is the MAX6335US23D3+ pin-compatible with other Maxim supervisory ICs?
Yes - the MAX6335US23D3+ uses the standard 4-pin SOT143 footprint and is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 families. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. However, output polarity (active-high) and timeout differ, so verify system-level reset logic compatibility.
MAX6335US23D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Strip
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.3V
- 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
MAX6335US23D3+ FAQ
1.How can I place an order for MAX6335US23D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US23D3+ 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 MAX6335US23D3+ reliable?
The price and inventory of MAX6335US23D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US23D3+ is usually 5 days.
3.What payment methods are accepted for MAX6335US23D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US23D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6335US23D3+?
MAX6335US23D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US23D3+ 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 MAX6335US23D3+?
For technical support, including MAX6335US23D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US23D3+ requirements.
6.How does Aetrix verify that MAX6335US23D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6335US23D3+ 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 MAX6335US23D3+ meets industry standards.
7.What is the process for return or replacement of MAX6335US23D3+?
All MAX6335US23D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US23D3+, 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 MAX6335US23D3+ part is unused and in its original packaging.
Return procedure for MAX6335US23D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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