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Analog Devices Inc./Maxim Integrated MAX6332UR20D3
- Part No.:
- MAX6332UR20D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6332UR20D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:243
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Product details
Overview
The MAX6332UR20D3 from Maxim Integrated is a push/pull, active-high microprocessor supervisory circuit in a 3-pin SOT23 package, designed for reliable power-on reset generation in ultra-low-voltage systems. It monitors VCC (0.7V to 5.5V), asserts RESET high when VCC falls below 2.00V ±1.8% at +25°C (±3% over -40°C to +125°C), and maintains the signal for ≥100ms after VCC recovers - enabling robust brownout protection in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6332UR20D3 datasheet, MAX6332UR20D3 pinout, MAX6332UR20D3 application, or MAX6332UR20D3 equivalent, key selection criteria include its guaranteed 0.7V operating supply, 3.3µA typical supply current at 1.8V, factory-trimmed 2.0V reset threshold, 100ms minimum timeout, and push/pull active-high output compatible with high-impedance μP reset inputs requiring asserted-high logic during fault conditions.
Technical Context
The MAX6332UR20D3 implements a precision bandgap-based voltage comparator with hysteresis and an internal timer for fixed reset timeout. Its reset assertion logic is tied directly to VCC monitoring without external RC components, and the push/pull output stage sources up to 200µA while sinking up to 1.2mA, ensuring valid logic levels across 1.0V–5.5V VCC range.
Reset propagation delay is specified at 24µs for VCC falling at 10V/ms, and the device rejects transients ≤24µs at 20mV overdrive - critical for noise-immune operation in switching-power-supply environments. The comparator's temperature coefficient is fully characterized from -40°C to +125°C, with reset timeout period variation normalized to <±25% over that range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures precise brownout detection for 2.0V nominal rails |
| Reset Timeout Period | ≥100ms - guarantees sufficient hold time for full μP initialization after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - supports operation down to near-dead-battery conditions in portable equipment |
| Supply Current | 3.3µA typical at VCC = 1.8V - enables multi-year battery life in always-on monitoring applications |
| Output Type | Push/pull, active-high RESET - eliminates need for external pull-up and drives high-impedance μP reset pins directly |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VCC Propagation Delay | 24µs (VCC falling at 10V/ms) - enables fast response to rapid supply collapse |
Pinout & Package
MAX6332UR20D3 is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for space-constrained portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-high push/pull output; remains high during VCC undervoltage and for ≥100ms post-recovery - directly interfaces μP reset input without external components |
| 3 | VCC | Power supply input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference - requires local 0.1µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables supervision of deeply discharged Li-ion cells (e.g., 1-cell packs down to 2.5V total) without auxiliary bias rails |
| Factory-trimmed 2.0V reset threshold | Eliminates external resistor divider calibration and reduces BOM count in 2.0V I/O domain systems |
| 100ms minimum reset timeout | Meets JEDEC JESD76 requirements for μP reset hold time in embedded controllers with slow clock startup |
| 3.3µA supply current at 1.8V | Reduces quiescent power by >90% versus discrete supervisor solutions using comparators and timers |
| Transient immunity to 24µs glitches | Prevents false resets caused by switching regulator ripple or ESD-induced supply dips |
Applications
| Battery-Powered Portable Instruments | Industrial Microcontroller Supervision |
|---|---|
|
Use Scenario: Handheld multimeters and data loggers powered by single-cell Li-ion batteries experiencing voltage sag during measurement bursts. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-high RESET to halt μC execution until battery voltage recovers above 2.00V, then holds reset for ≥100ms to ensure stable clock lock. Use Value: Prevents corrupted EEPROM writes and firmware crashes during transient brownouts, extending field reliability without adding discrete components. |
Use Scenario: PLC I/O modules operating in harsh factory environments with wide ambient temperature swings (-40°C to +125°C). IC Role / Device Role / Timing Role: Provides temperature-stable power-on reset and brownout detection for ARM Cortex-M4-based controllers, with guaranteed functionality down to 0.7V VCC. Use Value: Eliminates need for external watchdog ICs or RC timing networks, reducing board area and qualification effort for industrial safety-critical designs. |
| Medical Wearable Sensors | Automotive Body Control Modules |
|
Use Scenario: Continuous glucose monitors powered by coin-cell batteries where every nanoamp impacts service life. IC Role / Device Role / Timing Role: Delivers ultra-low-current (3.3µA typ.) supervision with active-high RESET to wake μP only when VCC exceeds 2.00V, synchronizing with sensor initialization sequence. Use Value: Extends battery runtime beyond 2 years while maintaining AEC-Q100-equivalent functional safety margins via guaranteed reset behavior over full temperature range. |
Use Scenario: Door module ECUs exposed to load-dump transients and cold-cranking voltage drops. IC Role / Device Role / Timing Role: Detects VCC collapse below 2.00V during cranking and asserts RESET high for ≥100ms after recovery, preventing spurious CAN frame transmission during power instability. Use Value: Ensures deterministic μP reset sequencing without external filtering, meeting ISO 7637-2 pulse 4 immunity requirements for body electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT20D3-T | Same 2.0V threshold and 100ms timeout, but open-drain active-low output; requires external pull-up resistor | Suitable for systems with bidirectional μP reset pins (e.g., legacy 68HC11) or wired-OR reset buses | Select MAX6327UT20D3-T only if active-low or open-drain interface is required; MAX6332UR20D3 avoids pull-up and simplifies layout |
| TLV803EB20DBZR | 2.0V threshold, 140ms timeout, active-low open-drain output; higher 8µA supply current; rated only to +85°C | Limited to commercial-temperature applications; lacks guaranteed operation below 1.0V VCC | Choose TLV803EB20DBZR only for cost-sensitive consumer designs where extended temperature and ultra-low-VCC operation are not required |
Compared with MAX6327UT20D3-T and TLV803EB20DBZR, the MAX6332UR20D3 uniquely delivers active-high push/pull output with 0.7V operational capability and full -40°C to +125°C qualification - making it the only option for space-constrained, battery-critical, and automotive-grade systems requiring no external components and deterministic high-level reset assertion.
Availability
MAX6332UR20D3 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial microcontroller supervision, and automotive body control modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6332UR20D3 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing markets.
The MAX6332UR20D3 belongs to Maxim's ultra-low-voltage μP supervisory family, engineered specifically for reliable reset generation in energy-constrained and thermally demanding embedded systems where precision, low quiescent current, and guaranteed sub-1V operation are mandatory.
FAQ
What is the exact reset threshold voltage of the MAX6332UR20D3 and how does it vary with temperature?
The MAX6332UR20D3 has a factory-trimmed nominal reset threshold of 2.00V at +25°C, with tolerance of ±1.8%. Over the full operating temperature range of -40°C to +125°C, the threshold shifts to ±3%, meaning the actual trip point stays within 1.94V to 2.06V. This tight specification ensures consistent brownout detection across automotive and industrial thermal profiles without recalibration.
Does the MAX6332UR20D3 require any external components to function as a reset supervisor?
No, the MAX6332UR20D3 operates autonomously with no external resistors, capacitors, or diodes required. Its internal voltage reference, comparator, and timer eliminate the need for RC networks used in discrete reset circuits. Only a 0.1µF ceramic capacitor on VCC is recommended for local decoupling - a standard practice, not a functional requirement.
How does the active-high push/pull output of the MAX6332UR20D3 differ from open-drain alternatives like the MAX6334UR20D3?
The MAX6332UR20D3 actively drives RESET high during fault conditions and low during normal operation, eliminating reliance on external pull-up resistors. In contrast, the MAX6334UR20D3 uses an open-drain output requiring a pull-up, which introduces leakage paths and slower rise times. This makes the MAX6332UR20D3 preferable for high-impedance μP inputs and noise-sensitive applications where deterministic logic levels are critical.
What is the minimum supply voltage at which the MAX6332UR20D3 guarantees correct reset behavior?
The MAX6332UR20D3 guarantees correct reset assertion and deassertion down to VCC = 0.7V across the full -40°C to +125°C temperature range. At voltages below 0.7V, the device may not maintain valid output states; however, this limit aligns with the operational floor of most 1.8V/2.5V μPs, ensuring synchronized shutdown before logic corruption occurs.
Can the MAX6332UR20D3 be used in automotive applications, and what qualifications support this use?
Yes, the MAX6332UR20D3 is suitable for automotive body electronics applications. It is specified over -40°C to +125°C, features guaranteed operation down to 0.7V VCC (critical during cold-cranking), and exhibits transient immunity to 24µs supply glitches - characteristics aligned with ISO 7637-2 pulse 4 requirements. While not AEC-Q200 certified as a standalone component, its electrical behavior meets functional safety needs for non-safety-critical ECUs.
MAX6332UR20D3 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:
- 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
MAX6332UR20D3 FAQ
1.How can I place an order for MAX6332UR20D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6332UR20D3 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 MAX6332UR20D3 reliable?
The price and inventory of MAX6332UR20D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6332UR20D3 is usually 5 days.
3.What payment methods are accepted for MAX6332UR20D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6332UR20D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6332UR20D3?
MAX6332UR20D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6332UR20D3 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 MAX6332UR20D3?
For technical support, including MAX6332UR20D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6332UR20D3 requirements.
6.How does Aetrix verify that MAX6332UR20D3 is sourced from the original manufacturer or authorized distributors?
All MAX6332UR20D3 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 MAX6332UR20D3 meets industry standards.
7.What is the process for return or replacement of MAX6332UR20D3?
All MAX6332UR20D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6332UR20D3, 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 MAX6332UR20D3 part is unused and in its original packaging.
Return procedure for MAX6332UR20D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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