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Analog Devices Inc./Maxim Integrated MAX6335US23D3+T
- Part No.:
- MAX6335US23D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US23D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:750
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Product details
Overview
MAX6335US23D3+T from Maxim Integrated is a push/pull, active-high microprocessor supervisory circuit designed for 1.8V–3.3V digital systems. It monitors VCC with a factory-trimmed 2.30V reset threshold, asserts RESET high during brownout or manual reset, and maintains reset for 100ms after recovery. It operates down to 0.7V supply and draws only 3.3µA at 2.5V - ideal for battery-powered instrumentation and automotive control modules.
For engineers reviewing the MAX6335US23D3+T datasheet, MAX6335US23D3+T pinout, MAX6335US23D3+T application, or MAX6335US23D3+T equivalent, key selection criteria include guaranteed RESET validity to VCC = 0.7V, 100ms timeout precision over –40°C to +125°C, SOT143 footprint compatibility with MAX811/MAX6314, and absence of external components in power-monitoring designs.
Technical Context
The MAX6335US23D3+T implements a precision bandgap-based voltage comparator with ±1.8% (25°C) and ±3% (–40°C to +125°C) threshold accuracy at 2.30V, coupled to a temperature-stable RC timer generating a minimum 100ms reset pulse. Its push/pull output drives CMOS inputs directly without pull-up resistors, and internal MR debouncing eliminates external RC networks.
It features glitch immunity against VCC transients ≤24µs at 10mV overdrive, and guarantees functional reset assertion even as VCC falls to 0.7V - enabling reliable startup sequencing in ultra-low-voltage embedded controllers where supply rails collapse rapidly during power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V ±1.8% (25°C); ensures precise brownout detection for 2.5V logic domains |
| Reset Timeout Period | 100ms min; holds µP in reset long enough for power stabilization and oscillator startup |
| Supply Voltage Range | 0.7V to 5.5V; supports operation during deep brownout and enables single-supply monitoring |
| Supply Current | 3.3µA at VCC = 2.5V; minimizes quiescent drain in always-on battery backup circuits |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Output Type | Push/pull, active-high RESET; drives high-impedance µP reset pins directly without external pull-up |
| VCC Propagation Delay | 24µs (VCC falling at 10V/ms); fast response to rapid supply collapse prevents spurious execution |
Pinout & Package
MAX6335US23D3+T is housed in a 4-pin SOT143 package (3.0mm × 1.6mm × 1.1mm), compatible with standard pick-and-place equipment and offering thermal resistance θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output driver; must be low-impedance to avoid noise-induced false resets |
| 2 - RESET | Active-high reset output | Drives high during fault conditions; sinks current when deasserted to ensure clean low-state release |
| 3 - MR | Debounced manual-reset input | Logic-low assertion triggers reset; internal 20kΩ pull-up allows NC use; no external debounce required |
| 4 - VCC | Power supply input | Monitored rail input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables valid reset assertion during deep brownout, supporting fail-safe shutdown in energy-harvesting systems |
| Factory-trimmed 2.30V threshold | Eliminates calibration overhead and matches 2.5V I/O domain requirements without external resistive dividers |
| 100ms minimum reset timeout | Guarantees µP core and PLLs achieve stable clock lock before instruction fetch begins |
| Debounced MR input | Removes need for external RC filter or firmware debouncing, reducing BOM count and PCB area |
| Transient-immune comparator | Rejects <24µs negative VCC glitches up to 10mV, preventing false resets in noisy automotive power nets |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: ECU power rail experiences rapid collapse during ignition-off or load-dump events. IC Role / Device Role / Timing Role: Monitors 2.5V microcontroller supply and asserts active-high RESET to halt CPU execution before voltage drops below functional threshold. Use Value: Prevents corrupted flash writes and register state loss by guaranteeing 100ms reset hold time while 12V system decays below 5V. |
Use Scenario: Battery-powered glucose meter wakes from sleep mode with marginal 1.8V LDO output. IC Role / Device Role / Timing Role: Acts as primary brownout detector on main 1.8V rail, asserting RESET until regulated supply stabilizes post-wake. Use Value: Draws only 3.3µA during sleep, extending battery life while ensuring deterministic restart at true 1.8V threshold - not approximated via resistor divider. |
| Industrial PLC I/O Module | Smart Energy Meter MCU |
Use Scenario: Module exposed to wide ambient temperatures (–40°C to +85°C) and conducted EMI on 3.3V logic rail. IC Role / Device Role / Timing Role: Provides temperature-compensated reset with ±3% threshold tolerance and transient immunity to maintain safe I/O isolation during grid surges. Use Value: Guarantees RESET remains asserted through 24µs VCC dips caused by relay coil switching, avoiding spurious I/O toggling. |
Use Scenario: Meter MCU requires tamper-proof power-on reset with zero external components to meet IEC 62056 certification. IC Role / Device Role / Timing Role: Delivers certified 100ms reset pulse and 2.30V threshold matching metrology ADC reference stability. Use Value: Eliminates external timing capacitor and resistor, reducing component count and improving long-term drift immunity in sealed meter housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS+T | 2.40V threshold, 140ms timeout, same SOT143 package and push/pull active-low output | Requires level-shifting or µP with active-low reset input; not drop-in due to polarity mismatch | Select when legacy design uses active-low reset and 2.4V threshold suffices for 2.5V rail margin |
| MAX6315US23D3+T | Identical 2.30V threshold and 100ms timeout, but open-drain active-low output | Needs external pull-up; incompatible with µPs requiring active-high reset without inversion logic | Choose only if interfacing with bidirectional reset pins (e.g., Motorola 68HC11) or shared reset buses |
Compared with MAX811TEUS+T and MAX6315US23D3+T, the MAX6335US23D3+T uniquely delivers active-high push/pull output with 2.30V threshold and 100ms timeout in SOT143 - eliminating level shifters, pull-ups, and layout changes required by alternatives.
Availability
MAX6335US23D3+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLC I/O modules, smart energy meters, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX6335US23D3+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 management, sensing, and interface applications in industrial, automotive, and communications systems.
The MAX6335 series belongs to Maxim's ultra-low-voltage µP supervisory product line, engineered specifically for reliable reset generation in space-constrained, battery-sensitive, and high-temperature embedded systems without external components.
FAQ
What is the exact reset threshold voltage of MAX6335US23D3+T and how tightly is it specified?
The MAX6335US23D3+T has a factory-trimmed reset threshold of 2.30V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This precision eliminates the need for external resistor dividers and ensures consistent brownout detection across temperature extremes in the MAX6335US23D3+T.
Does MAX6335US23D3+T require external components to function as a complete reset solution?
No - the MAX6335US23D3+T integrates all necessary functions: precision voltage reference, comparator, timer, and push/pull driver. It needs no external capacitors, resistors, or diodes, making it a true single-component reset solution. The MR input includes internal debouncing and a 20kΩ pull-up, further reducing BOM count for the MAX6335US23D3+T.
How does MAX6335US23D3+T behave when VCC drops below 1.0V?
The MAX6335US23D3+T guarantees correct reset assertion down to VCC = 0.7V. As VCC declines, its push/pull output maintains valid high/low states until 0.7V, ensuring µP reset integrity during deep brownout. Below 0.7V, operation is not specified - but the MAX6335US23D3+T remains functional longer than competing supervisors rated only to 1.0V.
Can MAX6335US23D3+T replace MAX811 in an existing design?
MAX6335US23D3+T is pin-compatible with MAX811 in SOT143, but differs in reset polarity (active-high vs. active-low) and threshold (2.30V vs. 2.40V or 2.93V). Direct replacement requires verifying µP reset input polarity and adjusting for 100mV lower threshold - the MAX6335US23D3+T cannot be substituted without schematic review.
What is the minimum reset timeout period guaranteed for MAX6335US23D3+T over temperature?
The MAX6335US23D3+T guarantees a minimum reset timeout of 100ms across –40°C to +125°C, with typical variation less than ±15% over temperature. This ensures sufficient hold time for oscillator stabilization and memory initialization in automotive and industrial applications using the MAX6335US23D3+T.
MAX6335US23D3+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:
- 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+T FAQ
1.How can I place an order for MAX6335US23D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US23D3+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 MAX6335US23D3+T reliable?
The price and inventory of MAX6335US23D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US23D3+T is usually 5 days.
3.What payment methods are accepted for MAX6335US23D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US23D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6335US23D3+T?
MAX6335US23D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US23D3+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 MAX6335US23D3+T?
For technical support, including MAX6335US23D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US23D3+T requirements.
6.How does Aetrix verify that MAX6335US23D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6335US23D3+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 MAX6335US23D3+T meets industry standards.
7.What is the process for return or replacement of MAX6335US23D3+T?
All MAX6335US23D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US23D3+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 MAX6335US23D3+T part is unused and in its original packaging.
Return procedure for MAX6335US23D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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