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Analog Devices Inc./Maxim Integrated MAX6332UR23D3+
- Part No.:
- MAX6332UR23D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6332UR23D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,191
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Product details
Overview
The MAX6332UR23D3+ 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 2.30V (±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 MAX6332UR23D3+ datasheet, MAX6332UR23D3+ pinout, MAX6332UR23D3+ application, or MAX6332UR23D3+ equivalent, key selection criteria include its 0.7V minimum operating voltage, 3.3µA supply current, factory-trimmed 2.30V reset threshold, 100ms timeout, and guaranteed RESET validity down to VCC = 0.7V-critical for low-power embedded systems with brownout resilience requirements.
Technical Context
This device implements a precision bandgap-based reset comparator with transient immunity, designed to ignore fast VCC glitches (e.g., ≤24µs negative transients at 10V/ms overdrive). Its internal timing circuit delivers a fixed, factory-set 100ms minimum reset timeout period independent of external components.
The MAX6332UR23D3+ uses a push/pull output stage that sources current during reset assertion (RESET = high) and sinks current when deasserted (RESET = low), enabling direct interface with CMOS inputs without pull-up resistors-unlike open-drain alternatives requiring external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V ±1.8% at +25°C; ensures precise 1.8V/2.5V rail monitoring without calibration |
| Reset Timeout Period | ≥100ms; guarantees sufficient hold time for μP initialization before release |
| Supply Voltage Range | 0.7V to 5.5V; supports operation during deep brownout and full-system power-up |
| Supply Current | 3.3µA typical at VCC = 2.5V; enables multi-year battery life in always-on monitoring |
| Operating Temperature | -40°C to +125°C; qualified for automotive under-hood and industrial control environments |
| Output Type | Active-high push/pull; eliminates need for external pull-up and simplifies PCB routing |
| VCC Falling Propagation Delay | 24µs; provides rapid response to supply collapse while rejecting sub-24µs noise |
Pinout & Package
Package: 3-pin SOT23 (U3+1 outline), footprint-compatible with industry-standard 3-pin supervisory ICs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be low-impedance for accurate threshold sensing |
| 2 (RESET) | Active-high push/pull reset output | Sources >1µA at VCC ≥1.0V during reset; sinks up to 1.2mA when deasserted-directly drives CMOS inputs |
| 3 (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 voltage | Enables valid reset assertion even during severe brownout-no external biasing required |
| Factory-trimmed 2.30V reset threshold | Eliminates external resistor networks and reduces BOM count in space-constrained designs |
| 100ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for microprocessor power-on reset duration |
| 3.3µA supply current at 2.5V | Reduces quiescent power by >90% vs. legacy 3-pin supervisors, extending battery runtime |
| Transient-immune reset comparator | Rejects <24µs VCC glitches-prevents spurious resets in noisy automotive or industrial power rails |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG and pulse oximeter units requiring continuous low-power supervision during sleep mode and wake-up transitions. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring deterministic μC boot after Li-ion voltage sag below 2.3V. Use Value: 0.7V operational floor and 3.3µA ICC enable >5-year shelf life; 100ms timeout satisfies FDA Class II boot validation timing. |
Use Scenario: DIN-rail mounted programmable logic controller modules exposed to 24VDC field wiring transients. IC Role / Device Role / Timing Role: Brownout detector asserting high-level RESET to ARM Cortex-M7 core during 24V rail dips. Use Value: 24µs glitch rejection prevents false resets from relay coil kickback; -40°C to +125°C rating ensures operation in uncooled enclosures. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Low-voltage subsystems (e.g., door module ECUs) powered from 5V LDOs fed by 12V battery with cold-crank dips. IC Role / Device Role / Timing Role: Primary reset generator holding MCU in reset until 5V rail stabilizes above 2.30V post-cold-crank. Use Value: Guaranteed RESET validity to 0.7V allows detection of marginal 5V LDO failure; SOT23 footprint minimizes PCB area in dense BCM layouts. |
Use Scenario: Revenue-grade electricity meters with tamper-detection circuits requiring fail-safe boot after power interruption. IC Role / Device Role / Timing Role: Supervisory watchdog ensuring secure bootloader execution only after stable 3.3V supply is confirmed. Use Value: Factory-trimmed 2.30V threshold matches 3.3V rail tolerance; 100ms timeout aligns with IEC 62053-21 power-up sequence requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR23D3+ | Same 2.30V threshold and 100ms timeout, but active-low push/pull output | Requires inverted logic handling in μP reset input; not drop-in for active-high designs | Select only if system architecture mandates active-low reset signaling |
| TPS3808G33DBVR | 2.93V reset threshold, 200ms timeout, 1.5µA ICC, same SOT23-3 package | Higher threshold unsuitable for 1.8V/2.5V rails; better for 3.3V-only systems | Choose when higher VTH and longer timeout are acceptable and lower ICC is prioritized |
Compared with MAX6332UR23D3+, MAX6327UR23D3+ offers identical timing and accuracy but requires board-level logic inversion, while TPS3808G33DBVR trades threshold precision and low-voltage operation for ultra-low current-making MAX6332UR23D3+ optimal for 1.8V–2.5V brownout-critical designs.
Availability
MAX6332UR23D3+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6332UR23D3+ 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, sensing, and connectivity in demanding industrial, automotive, and computing applications.
The MAX6332 series belongs to Maxim's ultra-low-voltage supervisory product line, engineered specifically for reliable reset generation in battery-powered and brownout-prone 1.8V–3.3V digital systems.
FAQ
What is the exact reset threshold voltage of the MAX6332UR23D3+?
The MAX6332UR23D3+ has a factory-trimmed nominal reset threshold of 2.30V, with a tolerance of ±1.8% at +25°C and ±3% over the full -40°C to +125°C temperature range. This value is specified in Table 1 of the datasheet and applies directly to the MAX6332UR23D3+ variant, ensuring consistent 2.3V rail monitoring without external adjustment.
Does the MAX6332UR23D3+ require external components to function?
No, the MAX6332UR23D3+ operates autonomously with no external components required. Its internal precision bandgap reference, comparator, and timing circuit deliver fully specified reset behavior-including 2.30V threshold detection and ≥100ms timeout-eliminating resistors, capacitors, or trimming adjustments typically needed in discrete reset solutions.
Can the MAX6332UR23D3+ operate reliably below 1.0V supply voltage?
Yes, the MAX6332UR23D3+ is guaranteed to assert and maintain a valid active-high RESET signal down to VCC = 0.7V, and remains functional over the full 0.7V–5.5V supply range. This capability is explicitly verified per the Absolute Maximum Ratings and Electrical Characteristics tables, making it suitable for deep brownout detection where other supervisors fail.
What is the purpose of the 100kΩ pull-up resistor recommended in the MAX6332UR23D3+ datasheet?
The 100kΩ pull-up resistor referenced in the MAX6332UR23D3+ Applications Information section ensures RESET remains high when VCC drops below 0.7V-extending validity beyond the IC's specified operating range. It compensates for reduced output drive strength near minimum VCC, preventing indeterminate logic states at the microprocessor's reset input.
Is the MAX6332UR23D3+ pin-compatible with the MAX809?
Yes, the MAX6332UR23D3+ is pin-compatible with the MAX809 in the SOT23-3 package, sharing identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments. However, the MAX6332UR23D3+ features an active-high output versus the MAX809's active-low output, requiring firmware or logic-level verification before substitution.
MAX6332UR23D3+ 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:
- 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-23-3
MAX6332UR23D3+ FAQ
1.How can I place an order for MAX6332UR23D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6332UR23D3+ 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 MAX6332UR23D3+ reliable?
The price and inventory of MAX6332UR23D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6332UR23D3+ is usually 5 days.
3.What payment methods are accepted for MAX6332UR23D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6332UR23D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6332UR23D3+?
MAX6332UR23D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6332UR23D3+ 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 MAX6332UR23D3+?
For technical support, including MAX6332UR23D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6332UR23D3+ requirements.
6.How does Aetrix verify that MAX6332UR23D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6332UR23D3+ 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 MAX6332UR23D3+ meets industry standards.
7.What is the process for return or replacement of MAX6332UR23D3+?
All MAX6332UR23D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6332UR23D3+, 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 MAX6332UR23D3+ part is unused and in its original packaging.
Return procedure for MAX6332UR23D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6332UR23D3+ Tags
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