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Analog Devices Inc./Maxim Integrated MAX6335US22D3+
- Part No.:
- MAX6335US22D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US22D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,042
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Product details
Overview
MAX6335US22D3+ 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 2.20V reset threshold, asserts RESET high during brownout or manual reset, and maintains reset for 100ms minimum after recovery. It operates down to 0.7V supply and draws only 3.3µA at 2.5V - ideal for battery-powered instrumentation and embedded controllers requiring reliable power-on reset.
For engineers reviewing the MAX6335US22D3+ datasheet, MAX6335US22D3+ pinout, MAX6335US22D3+ application, or MAX6335US22D3+ equivalent, key selection criteria include its active-high output structure, guaranteed RESET validity to VCC = 0.7V, 100ms timeout, SOT143 package compatibility, and precise 2.20V threshold tolerance (±1.8% at +25°C, ±3% over –40°C to +125°C).
Technical Context
The MAX6335US22D3+ implements a precision bandgap-based voltage comparator with factory-trimmed hysteresis to detect VCC falling below 2.20V. Its internal timing circuit generates a fixed 100ms minimum reset pulse width after VCC recovery or MR deassertion, independent of supply voltage variation across temperature.
It features a debounced manual-reset input (MR) with 20kΩ internal pull-up and glitch immunity up to 30ns. The push/pull output drives high (VOH ≥ 0.8VCC at ISOURCE = 200µA, VCC ≥ 1.8V) and low (VOL ≤ 0.3V at ISINK = 500µA, VCC ≥ 1.8V), ensuring robust interfacing with CMOS µP reset inputs without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±1.8% (25°C), ±3% (–40°C to +125°C); ensures accurate brownout detection for 2.5V/1.8V rails |
| Reset Timeout Period | 100ms minimum; guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V; supports ultra-low-voltage operation during deep brownout and battery depletion |
| Quiescent Current | 3.3µA typical at 2.5V, 25°C; enables multi-year operation in coin-cell–powered devices |
| Output Type | Push/pull, active-high RESET; eliminates need for external pull-up resistor on µP reset input |
| MR Input Threshold | 0.5V max (VIL), 0.42V typical; compatible with 1.8V logic levels and tolerant of noise on manual switch lines |
| Operating Temperature | –40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6335US22D3+ is housed in a 4-pin SOT143 package (JEDEC TO-236AB), measuring 2.9mm × 1.3mm × 1.0mm, with gull-wing leads and lead-free +T suffix indicating RoHS-compliant termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for all internal circuitry; must be connected directly to system ground plane |
| 2 - RESET | Active-high reset output | Drives high during fault condition (VCC < 2.20V or MR asserted); remains high for ≥100ms post-recovery |
| 3 - MR | Manual reset input | Logic-low assertion (≤0.5V) forces RESET high; internally pulled up to VCC (20kΩ); debounced internally |
| 4 - VCC | Power supply input | Supplies internal regulator and comparator; valid from 0.7V to 5.5V; powers RESET output stage |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low operating voltage | Functional RESET assertion down to VCC = 0.7V - critical for fail-safe behavior in deep brownout |
| Factory-trimmed precision threshold | 2.20V ±1.8% at 25°C enables direct replacement of discrete resistor-divider supervisors |
| Debounced manual reset | Eliminates need for external RC filter or Schmitt trigger; supports momentary switch to GND |
| Transient-immune comparator | Rejects VCC glitches ≤30ns at 100mV overdrive - prevents spurious resets in noisy power environments |
| No external components required | Reduces BOM count and PCB area vs. discrete supervisor solutions; simplifies layout and qualification |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Wearable ECG patch powered by single Li-MnO₂ cell with voltage decay from 3.0V to 1.8V over service life. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-high RESET to ARM Cortex-M0+ MCU when voltage drops below 2.20V, preventing corrupted memory writes during brownout. Use Value: 0.7V minimum operating voltage ensures reset remains valid even as battery nears end-of-life, avoiding unsafe operation. |
Use Scenario: Door module with LIN transceiver and flash-based microcontroller exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Provides 100ms power-on reset pulse and brownout detection at 2.20V to guarantee deterministic boot sequence after ignition cycling. Use Value: Guaranteed operation from –40°C to +125°C and transient immunity prevent false resets during engine compartment thermal stress. |
| Industrial PLC I/O Submodules | Smart Energy Meters |
|
Use Scenario: DIN-rail mounted analog input card powered from isolated 3.3V DC-DC converter with ±5% regulation tolerance. IC Role / Device Role / Timing Role: Supervises 3.3V rail and triggers active-high RESET on host FPGA if supply sags below 2.20V due to overload or transformer saturation. Use Value: Push/pull output eliminates external pull-up, reducing component count and improving noise margin on long PCB traces. |
Use Scenario: Revenue-grade meter with real-time clock and metrology ASIC operating from supercapacitor backup during AC mains failure. IC Role / Device Role / Timing Role: Detects 1.8V backup rail collapse and asserts RESET to halt measurement cycles before data corruption occurs. Use Value: 3.3µA quiescent current extends supercapacitor hold-up time by >15% versus higher-current alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US22D3+ | Same 2.20V threshold and 100ms timeout, but rated only to +85°C (vs. +125°C); lower ICC (2.5µA) | Not qualified for under-hood automotive or extended-temperature industrial use | Select MAX6335US22D3+ when full –40°C to +125°C operation is required |
| TPS3808G125DBVR | 2.5V threshold (not 2.20V); 200ms timeout; 1.4µA ICC; open-drain output (requires pull-up) | Lacks active-high output and exact 2.20V match; requires board-level redesign for RESET interface | Choose MAX6335US22D3+ when active-high drive and precise 2.20V detection are mandatory |
Compared with MAX6315US22D3+, the MAX6335US22D3+ adds extended temperature range and slightly higher supply current for enhanced reliability; versus TPS3808G125DBVR, it provides exact threshold matching, active-high output, and no external pull-up dependency - reducing design risk in safety-critical brownout response.
Availability
MAX6335US22D3+ is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial PLC I/O submodules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6335US22D3+ 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, and computing applications.
The MAX6335 series belongs to Maxim's µP supervisory product line, engineered specifically for fail-safe power monitoring in space-constrained, low-power systems where deterministic reset behavior under brownout is non-negotiable.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6335US22D3+?
The MAX6335US22D3+ has a factory-trimmed reset threshold of 2.20V, with a tolerance of ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This value is laser-trimmed during production and verified per Table 1 in the datasheet; it enables precise supervision of 2.5V rails while accommodating typical voltage tolerances in DC-DC converters.
Does MAX6335US22D3+ require an external pull-up resistor on the RESET pin?
No, MAX6335US22D3+ does not require an external pull-up resistor because it features a push/pull output stage that actively drives RESET high during fault conditions and low when deasserted. This eliminates passive components, reduces PCB area, and improves noise immunity compared to open-drain alternatives like the MAX6337US22D3+.
What is the minimum supply voltage at which MAX6335US22D3+ guarantees correct RESET output state?
MAX6335US22D3+ guarantees correct RESET output state down to VCC = 0.7V - meaning it will assert RESET high reliably even as the supply collapses during deep brownout. This specification is validated across temperature and ensures safe shutdown behavior in battery-powered systems approaching end-of-life voltage.
How is the 100ms reset timeout period implemented in MAX6335US22D3+?
The 100ms reset timeout period in MAX6335US22D3+ is generated by an internal RC timing circuit factory-programmed during wafer test. It is specified as minimum 100ms (typical 150ms, max 200ms) and remains stable across –40°C to +125°C, with normalized variation ≤±15% over temperature - ensuring consistent processor initialization time regardless of ambient conditions.
Is MAX6335US22D3+ pin-compatible with legacy Maxim supervisors like MAX812?
Yes, MAX6335US22D3+ is pin-compatible with MAX812 and MAX6314/MAX6315 in the same SOT143 package. Pin 1 (GND), Pin 2 (RESET), Pin 3 (MR), and Pin 4 (VCC) align functionally and physically, enabling drop-in replacement in existing layouts - provided the application requires active-high RESET and the same 2.20V threshold.
MAX6335US22D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.2V
- 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
MAX6335US22D3+ FAQ
1.How can I place an order for MAX6335US22D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US22D3+ 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 MAX6335US22D3+ reliable?
The price and inventory of MAX6335US22D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US22D3+ is usually 5 days.
3.What payment methods are accepted for MAX6335US22D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US22D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6335US22D3+?
MAX6335US22D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US22D3+ 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 MAX6335US22D3+?
For technical support, including MAX6335US22D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US22D3+ requirements.
6.How does Aetrix verify that MAX6335US22D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6335US22D3+ 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 MAX6335US22D3+ meets industry standards.
7.What is the process for return or replacement of MAX6335US22D3+?
All MAX6335US22D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US22D3+, 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 MAX6335US22D3+ part is unused and in its original packaging.
Return procedure for MAX6335US22D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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