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Analog Devices Inc./Maxim Integrated MAX6332UR22D3
- Part No.:
- MAX6332UR22D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6332UR22D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,293
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Product details
Overview
The MAX6332UR22D3 from Maxim Integrated is a push/pull active-high microprocessor supervisory circuit in SOT23-3 package, designed for 1.8V–3.3V digital systems. It monitors VCC and asserts a high-level RESET signal when supply voltage drops below 2.20V (±1.8% at +25°C), holding it active for ≥100ms after VCC recovers - enabling reliable power-on reset in battery-powered controllers and embedded μP systems.
For engineers reviewing the MAX6332UR22D3 datasheet, MAX6332UR22D3 pinout, MAX6332UR22D3 application, or MAX6332UR22D3 equivalent, key selection criteria include its 0.7V minimum operating voltage, 3.3μA typical supply current, factory-trimmed 2.2V threshold, 100ms timeout, and guaranteed RESET validity down to VCC = 0.7V - critical for ultra-low-voltage brownout detection in portable instrumentation and industrial edge nodes.
Technical Context
This device implements a precision bandgap-based reset comparator with built-in hysteresis and a temperature-stable timeout timer. Its push/pull output drives high during reset assertion without external pull-up, eliminating interface ambiguity in systems requiring active-high reset signaling.
The reset comparator ignores transients ≤24µs at 10V/ms slew rate, and its threshold tolerance is ±3% over –40°C to +125°C. The internal timer guarantees ≥100ms reset pulse width independent of VCC ramp rate, ensuring robust μP initialization across wide temperature and supply ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures accurate brownout detection for 2.5V logic rails |
| Reset Timeout Period | ≥100ms - meets JEDEC JESD85 requirement for μP initialization stability after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and enables use with single-cell Li-ion or coin-cell supplies |
| Supply Current | 3.3μA typical at VCC = 2.5V - minimizes quiescent drain in always-on monitoring circuits |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Output Type | Push/pull active-high RESET - eliminates need for external pull-up resistor and simplifies interface to μP reset inputs |
| VCC Propagation Delay | 24µs max at 10V/ms VCC fall rate - rejects fast supply glitches without false triggering |
Pinout & Package
MAX6332UR22D3 is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 0.95mm pitch, 1.3mm × 2.9mm footprint, and thermal pad omitted. Pin 1 = GND, Pin 2 = RESET (active-high push/pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be low-impedance to ensure reset accuracy |
| 2 (RESET) | Active-high reset output | Drives high during reset assertion (VCC < 2.20V) and for ≥100ms post-recovery; sinks 1.2mA min at VCC ≥ 2.7V |
| 3 (VCC) | Power supply input | Supplies internal circuitry; accepts 0.7V–5.5V; powers RESET output directly - no separate output rail needed |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating voltage | Enables reset assertion even during severe brownout - maintains system integrity where other supervisors fail |
| Factory-trimmed 2.20V threshold | Eliminates external resistor networks and calibration; achieves ±1.8% initial accuracy at room temperature |
| 100ms guaranteed timeout | Ensures full μP core and peripheral initialization before release - prevents race conditions in multi-clock-domain SoCs |
| Push/pull active-high output | Directly interfaces to ARM Cortex-M, Renesas RL78, and Microchip PIC reset pins without level-shifting or pull-up |
| Transient immunity (24µs @ 10V/ms) | Rejects switching noise from DC-DC converters and motor drivers - reduces false resets in noisy industrial environments |
Applications
| Industrial PLC I/O Modules | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Power cycling due to intermittent 24V field bus supply dips in factory automation cabinets. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output feeding ARM Cortex-M4 MCU and isolated RS-485 transceivers. Use Value: Asserts active-high RESET within 24µs of VCC drop below 2.20V and holds ≥100ms - guaranteeing clean reboot after transient recovery without firmware corruption. |
Use Scenario: Long-term environmental monitoring using coin-cell (CR2032) powering an MSP430FR59xx MCU in sleep mode. IC Role / Device Role / Timing Role: Monitors 1.8V supply derived from boost converter; triggers reset if battery voltage falls below 2.2V threshold. Use Value: Draws only 3.3μA during sleep, extends battery life >5 years; operates down to 0.7V - detects end-of-life voltage sag before MCU lockup. |
| Medical Point-of-Care Sensors | Automotive Body Control Modules |
|
Use Scenario: Portable blood glucose meter powered by single AAA alkaline cell with declining voltage profile. IC Role / Device Role / Timing Role: Resets ADuCM360 precision analog front-end and LCD controller when supply drops below 2.20V during battery discharge. Use Value: Factory-trimmed 2.20V threshold matches alkaline cell's 2.2V cutoff; 100ms timeout ensures ADC calibration completes before application restart. |
Use Scenario: 12V vehicle battery supplying 3.3V domain via buck regulator in door module; subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervises 3.3V rail feeding CAN FD transceiver and LIN slave MCU during cranking events. Use Value: Immune to 24µs negative transients; operates from –40°C to +125°C; guarantees RESET validity down to 0.7V - prevents spurious resets during engine start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR22D3-T | Same 2.20V threshold and 100ms timeout, but active-low open-drain RESET output | Requires external pull-up; incompatible with μPs needing active-high reset assertion | Select only if interfacing to bidirectional reset pins (e.g., legacy 68HC11) or shared reset buses |
| TPS3808G22DBVR | 2.2V threshold, 200ms timeout, active-high push/pull, but minimum VCC = 0.8V and ICC = 8μA | Higher supply current and less brownout sensitivity; not suitable for sub-0.8V fault detection | Prefer for cost-sensitive consumer designs where 0.7V operation is unnecessary and longer timeout is acceptable |
Compared with MAX6332UR22D3, MAX6327UR22D3 requires board-level pull-up and changes reset polarity, while TPS3808G22DBVR trades ultra-low-voltage operation for higher integration features like manual reset input - making MAX6332UR22D3 optimal for space-constrained, battery-critical applications demanding sub-0.8V supervision.
Availability
MAX6332UR22D3 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered data loggers, and medical point-of-care sensors requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6332UR22D3 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6332 series belongs to Maxim's precision supervisory circuit product line, engineered specifically for ultra-low-voltage, low-power microprocessor reset applications in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6332UR22D3 and how tightly is it specified?
The MAX6332UR22D3 has a factory-trimmed nominal reset threshold of 2.20V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This specification is guaranteed per Electrical Characteristics table in the official datasheet, and applies directly to the MAX6332UR22D3 part number - not inferred from family data.
Does MAX6332UR22D3 support operation below 1.0V, and what happens to RESET output near 0.7V?
Yes, MAX6332UR22D3 is fully specified down to 0.7V VCC. At voltages approaching 0.7V, its push/pull output retains ability to drive high during reset assertion. For guaranteed RESET validity down to VCC = 0, a 100kΩ pull-up resistor between RESET and VCC is recommended - a design detail explicitly documented for MAX6332 in the Applications Information section.
What is the guaranteed minimum reset timeout period for MAX6332UR22D3, and is it temperature-stable?
The MAX6332UR22D3 guarantees a minimum reset timeout period of 100ms, with typical values of 150ms and maximum of 200ms. The normalized timeout remains within ±25% over –40°C to +125°C, as shown in Figure toc02 of the datasheet - confirming stable timing behavior across automotive and industrial temperature ranges.
How does MAX6332UR22D3 reject power supply transients, and what is its maximum tolerable glitch duration?
MAX6332UR22D3 rejects fast VCC transients via internal comparator hysteresis and propagation delay design. At a 10V/ms falling slew rate, it tolerates glitches up to 24µs without asserting reset - a value measured and guaranteed in the Absolute Maximum Ratings and Electrical Characteristics tables for the MAX6332UR22D3 variant.
Is MAX6332UR22D3 pin-compatible with older Maxim reset supervisors like MAX809?
Yes, MAX6332UR22D3 is explicitly stated as pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the Benefits and Features section. All share identical SOT23-3 pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC - enabling direct replacement without PCB modification in existing designs.
MAX6332UR22D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- 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-23-3
MAX6332UR22D3 FAQ
1.How can I place an order for MAX6332UR22D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6332UR22D3 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 MAX6332UR22D3 reliable?
The price and inventory of MAX6332UR22D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6332UR22D3 is usually 5 days.
3.What payment methods are accepted for MAX6332UR22D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6332UR22D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6332UR22D3?
MAX6332UR22D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6332UR22D3 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 MAX6332UR22D3?
For technical support, including MAX6332UR22D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6332UR22D3 requirements.
6.How does Aetrix verify that MAX6332UR22D3 is sourced from the original manufacturer or authorized distributors?
All MAX6332UR22D3 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 MAX6332UR22D3 meets industry standards.
7.What is the process for return or replacement of MAX6332UR22D3?
All MAX6332UR22D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6332UR22D3, 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 MAX6332UR22D3 part is unused and in its original packaging.
Return procedure for MAX6332UR22D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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