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Analog Devices Inc./Maxim Integrated MAX6332UR22D3+T
- Part No.:
- MAX6332UR22D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6332UR22D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,156
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Product details
Overview
MAX6332UR22D3+T from Maxim Integrated is an ultra-low-voltage, push/pull active-high microprocessor supervisory circuit in a 3-pin SOT23 package. It monitors 1.8V–3.3V power supplies, asserts a high-level RESET signal when VCC falls below 2.20V (±1.8% at +25°C), and holds it for ≥100ms after VCC recovers-ensuring reliable boot sequencing in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6332UR22D3+T datasheet, MAX6332UR22D3+T pinout, MAX6332UR22D3+T application, or MAX6332UR22D3+T equivalent, key selection criteria include its 0.7V minimum operating voltage, 3.3µA supply current, factory-trimmed 2.20V reset threshold, and guaranteed RESET validity down to VCC = 0.7V-critical for low-power embedded systems with brownout resilience requirements.
Technical Context
The MAX6332UR22D3+T implements a precision bandgap-based reset comparator with hysteresis, immune to fast VCC transients up to 24µs at 10V/ms slew rate. Its internal timeout generator delivers a fixed ≥100ms reset pulse width, independent of external components.
This device operates across –40°C to +125°C with full electrical specification, including ±3% reset threshold tolerance over temperature and guaranteed push/pull output drive (VOH = 0.8×VCC at ISOURCE = 200µA, VOL = 0.3V at ISINK = 1.2mA) down to VCC = 1.8V.
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 2.2V nominal rails |
| Reset Timeout Period | ≥100ms - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V systems |
| Supply Current | 3.3µA typical at VCC = 2.5V - enables multi-year battery life in always-on monitoring applications |
| Output Type | Active-high push/pull RESET - eliminates need for external pull-up resistor and simplifies interface to CMOS inputs |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VCC Propagation Delay | 24µs max at 10V/ms VCC fall rate - rejects short-duration supply glitches without false resets |
Pinout & Package
MAX6332UR22D3+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051), with 0.95mm pitch, 1.3mm × 2.9mm footprint, and thermal pad omitted. The package supports reflow soldering at +260°C (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-high push/pull output; drives high during reset assertion (VCC < VTH) and for ≥100ms post-recovery; sinks up to 1.2mA |
| 3 | VCC | Power input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables reset assertion even during severe brownout conditions where most µPs are nonfunctional |
| Factory-trimmed 2.20V reset threshold | Eliminates external resistor networks and calibration; reduces BOM count and board space in space-constrained designs |
| Guaranteed RESET validity to VCC = 0.7V | Ensures deterministic logic state at µP reset input during power collapse-no external pull-up needed |
| No external components required | Reduces design risk, qualification effort, and long-term field failure modes associated with discrete timing elements |
| Transient-immune reset comparator | Rejects ≤24µs negative VCC glitches at 10V/ms, preventing spurious resets in noisy power environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and ECG patch sensors requiring reliable startup after cold-temperature storage or partial discharge. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to ARM Cortex-M0+ MCU until regulated 2.2V rail stabilizes post-battery insertion. Use Value: 3.3µA quiescent current extends single-CR2032 battery life beyond 5 years; 0.7V operation ensures reset remains valid during battery voltage sag to 0.9V. |
Use Scenario: DIN-rail mounted programmable logic controller modules exposed to 40V load-dump transients and wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary power-on reset generator for dual-core RISC-V SoC, coordinating firmware initialization after 24V-to-3.3V DC/DC stabilization. Use Value: ±3% reset threshold tolerance over –40°C to +125°C prevents false resets during thermal cycling; 24µs glitch immunity avoids lockup during relay switching noise. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Door module ECUs powered from vehicle battery with stop-start operation causing frequent 6V–12V supply dips. IC Role / Device Role / Timing Role: Brownout detector triggering active-high RESET to Infineon AURIX TC2xx MCU when 3.3V domain drops below 2.2V during cranking. Use Value: Guaranteed operation down to 0.7V allows reset assertion even as 3.3V LDO collapses; push/pull output eliminates external pull-up, reducing component count in ASIL-B designs. |
Use Scenario: ANSI C12.20-certified electricity meters with supercapacitor backup and tamper-detection circuitry. IC Role / Device Role / Timing Role: Power-fail supervisor holding active-high RESET to TI MSP430FR5994 during AC mains loss, enabling secure flash write completion before shutdown. Use Value: ≥100ms timeout provides ample time for EEPROM commit and cryptographic key sealing; 2.20V threshold matches meter's 2.2V LDO output for precise undervoltage detection. |
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 | Active-low push/pull output; identical 2.20V threshold and 100ms timeout; same SOT23-3 package | Requires µP with active-low reset input; incompatible with active-high-only reset pins | Select when interfacing with legacy microcontrollers expecting inverted reset polarity |
| TPS3123E18DBVR | 2.18V threshold (±0.5%), 200ms timeout, 1.2µA ICC; SOT23-3 but different pinout (GND/RESET/VCC) | Higher accuracy threshold but longer timeout; pin 1 is GND vs. MAX6332's pin 1 GND - requires PCB redesign | Choose for ultra-low-power designs needing tighter threshold tolerance, accepting layout change and longer reset hold time |
Compared with MAX6332UR22D3+T, MAX6327UR22D3+T offers identical timing and threshold but inverted logic-requiring no PCB changes if µP accepts active-low reset. TPS3123E18DBVR improves threshold accuracy and reduces current but mandates board revision due to non-pin-compatible pinout and longer reset duration.
Availability
MAX6332UR22D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6332UR22D3+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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.
The MAX6332 series belongs to Maxim's ultra-low-voltage supervisory product line, designed specifically for reliable power-monitoring in battery-critical and wide-temperature embedded systems where traditional reset ICs fail to operate.
FAQ
What is the exact reset threshold voltage of MAX6332UR22D3+T and how does it vary with temperature?
The MAX6332UR22D3+T has a factory-trimmed nominal reset threshold of 2.20V at +25°C, with ±1.8% tolerance at room temperature and ±3% over the full –40°C to +125°C range. This means the actual trip point stays between 2.13V and 2.27V at +25°C, and between 2.13V and 2.27V across the entire operating temperature span-ensuring consistent brownout detection in thermally demanding environments without recalibration.
Does MAX6332UR22D3+T require any external components to function?
No, MAX6332UR22D3+T requires no external resistors, capacitors, or timing components. Its 2.20V threshold is factory-laser-trimmed, and its ≥100ms reset timeout is generated internally. Only a standard 0.1µF ceramic decoupling capacitor on the VCC pin is recommended for noise suppression-making MAX6332UR22D3+T a true single-component solution for µP reset generation.
Can MAX6332UR22D3+T operate reliably when VCC drops below 1.0V?
Yes, MAX6332UR22D3+T is fully specified down to VCC = 0.7V and guarantees correct reset assertion and output state integrity at that level. Unlike many supervisory ICs that cease functioning below 1.0V, MAX6332UR22D3+T maintains active-high RESET validity through deep brownout-critical for preserving system state during catastrophic power collapse in portable and automotive applications.
What is the maximum VCC slew rate that MAX6332UR22D3+T can reject without issuing a false reset?
MAX6332UR22D3+T rejects negative-going VCC transients up to 24µs in duration when the supply falls at 10V/ms. This transient immunity is confirmed by the "Maximum Transient Duration vs. Reset Comparator Overdrive" curve in the datasheet. At slower slew rates (e.g., 1V/ms), the allowable glitch width increases-enabling robust operation in electrically noisy environments like motor drives or relay-controlled systems.
Is MAX6332UR22D3+T pin-compatible with other common reset ICs?
MAX6332UR22D3+T is pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the SOT23-3 package (pin 1 = GND, pin 2 = RESET, pin 3 = VCC). However, output polarity differs: MAX6332UR22D3+T is active-high, while MAX809/MAX6327 are active-low. Direct substitution requires verification of µP reset input polarity and may necessitate firmware or schematic updates.
MAX6332UR22D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- 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-23-3
MAX6332UR22D3+T FAQ
1.How can I place an order for MAX6332UR22D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6332UR22D3+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 MAX6332UR22D3+T reliable?
The price and inventory of MAX6332UR22D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6332UR22D3+T is usually 5 days.
3.What payment methods are accepted for MAX6332UR22D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6332UR22D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6332UR22D3+T?
MAX6332UR22D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6332UR22D3+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 MAX6332UR22D3+T?
For technical support, including MAX6332UR22D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6332UR22D3+T requirements.
6.How does Aetrix verify that MAX6332UR22D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6332UR22D3+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 MAX6332UR22D3+T meets industry standards.
7.What is the process for return or replacement of MAX6332UR22D3+T?
All MAX6332UR22D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6332UR22D3+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 MAX6332UR22D3+T part is unused and in its original packaging.
Return procedure for MAX6332UR22D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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