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Analog Devices Inc./Maxim Integrated MAX6332UR18D3+
- Part No.:
- MAX6332UR18D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6332UR18D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,659
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Product details
Overview
The MAX6332UR18D3+ from Maxim Integrated is a push/pull, active-high microprocessor supervisory circuit designed for 1.8V power supply monitoring in space-constrained embedded systems. It asserts a high-level RESET signal when VCC drops below 1.80V (±1.8% at +25°C), maintains reset for ≥100ms after VCC recovers, operates down to 0.7V supply, draws only 3.0–6.0µA at 1.8V, and is housed in a 3-pin SOT23 package.
For engineers reviewing the MAX6332UR18D3+ datasheet, MAX6332UR18D3+ pinout, MAX6332UR18D3+ application, or MAX6332UR18D3+ equivalent, this device is selected for ultra-low-voltage brownout detection, battery-powered system initialization, and reliable reset assertion in automotive-grade temperature ranges (−40°C to +125°C) without external components.
Technical Context
The MAX6332UR18D3+ implements a precision bandgap-based reset comparator with factory-trimmed 1.80V threshold (±3% over −40°C to +125°C), immune to fast VCC transients ≤24µs at 10V/ms slew rate. Its push/pull output drives high (≥0.8×VCC) during reset assertion and low (≤0.3V at 500µA sink) when inactive.
Reset timeout is fixed at ≥100ms (nominal 150ms), guaranteed across full temperature range and supply voltage (0.7V–5.5V). The device remains functional and guarantees valid RESET/RESET states down to VCC = 0.7V - critical for low-power wake-up sequencing in portable equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.80V ±1.8% at +25°C; ±3% over −40°C to +125°C - ensures accurate 1.8V rail monitoring without calibration |
| Reset Timeout Period | ≥100ms (typ. 150ms) - provides sufficient hold time for microprocessor core and peripheral stabilization |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V/5V systems |
| Supply Current | 3.0–6.0µA 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 resistor and simplifies interface to CMOS inputs |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial control, and extended-range embedded use |
| VCC Propagation Delay | 24µs (VCC falling at 10V/ms) - rejects short-duration supply glitches without false resets |
Pinout & Package
Package: 3-pin SOT23 (U3+1 outline), footprint-compatible with industry-standard 3-pin supervisory ICs; RoHS-compliant, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output driver; must be connected directly to system ground plane |
| 2 | RESET | Active-high push/pull reset output; drives high during VCC undervoltage and ≥100ms recovery window |
| 3 | VCC | Power supply input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables reset assertion even during severe brownout - critical for fail-safe shutdown in battery-depleted systems |
| Factory-trimmed 1.80V threshold | Eliminates external resistor networks and reduces BOM count while maintaining ±3% accuracy over full temperature range |
| 100ms minimum reset timeout | Guarantees processor core and memory initialization completes before release - prevents boot failure in complex SoCs |
| 3.3µA typical supply current | Reduces quiescent power in always-on monitoring paths - extends shelf life of sealed portable instrumentation |
| Transient-immune reset comparator | Rejects VCC glitches up to 24µs duration - avoids spurious resets in electrically noisy environments (e.g., motor drives) |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power-up sequencing and brownout recovery in DIN-rail mounted programmable logic controllers exposed to 24V DC supply fluctuations. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring deterministic µP startup and watchdog reset coordination after line sag. Use Value: Guaranteed 0.7V operation and 100ms timeout prevent lockup during factory floor voltage dips; SOT23 saves PCB area in dense I/O modules. |
Use Scenario: Battery-backed vital signs monitor requiring reliable cold-start and low-power sleep/wake cycles. IC Role / Device Role / Timing Role: Primary reset source asserting high-level RESET to ARM Cortex-M0+ during Li-ion discharge from 3.6V to 1.8V. Use Value: 3.3µA ICC extends battery runtime; 1.80V threshold aligns precisely with MCU's minimum operating voltage specification. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Reset management in BCMs subjected to load-dump and cold-crank conditions per ISO 16750-2. IC Role / Device Role / Timing Role: Brownout detector interfacing directly to 1.8V domain of automotive microcontroller with no level-shifting. Use Value: −40°C to +125°C rating and transient immunity ensure compliance with AEC-Q100 Grade 2; push/pull output avoids pull-up leakage in high-temperature enclosures. |
Use Scenario: Tamper-resistant electricity meter with nonvolatile memory and real-time clock requiring glitch-free power-on reset. IC Role / Device Role / Timing Role: Primary supervisor for 1.8V RTC and secure element, asserting RESET until main 3.3V rail stabilizes. Use Value: Factory-trimmed 1.80V threshold eliminates calibration drift over 15-year field life; SOT23 footprint allows placement near sensitive analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR18D3+ | Same 1.80V threshold and 100ms timeout, but push/pull active-low output; requires logic inversion or MCU pin reassignment | Compatible where µP reset pin expects active-low assertion; not drop-in due to polarity mismatch | Select MAX6326UR18D3+ only if target microcontroller has dedicated active-low reset input and board layout permits polarity alignment |
| TPS3123E18DBVR | 1.80V threshold, 200ms timeout, 3.5µA ICC, but rated only to +85°C; no guaranteed operation below 1.0V supply | Suitable for commercial-grade consumer electronics, not automotive or extended-temperature industrial use | Choose TPS3123E18DBVR only for cost-sensitive, non-automotive designs where 125°C operation and sub-1.0V functionality are unnecessary |
Compared with MAX6332UR18D3+, MAX6326UR18D3+ offers identical timing and threshold but inverted logic, while TPS3123E18DBVR trades extended temperature and ultra-low-voltage operation for lower unit cost in benign environments.
Availability
MAX6332UR18D3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across long production lifecycles.
Supply support for MAX6332UR18D3+ 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 MAX6332 series belongs to Maxim's ultra-low-voltage supervisory product line, engineered specifically for reliable reset generation in battery-powered and wide-temperature embedded systems using 1.8V–3.3V rails.
FAQ
What is the exact reset threshold voltage of the MAX6332UR18D3+?
The MAX6332UR18D3+ has a factory-trimmed nominal reset threshold of 1.80V, with tolerance of ±1.8% at +25°C and ±3% over the full operating temperature range (−40°C to +125°C). This value is verified per Table 1 in the official datasheet and applies specifically to the "UR18" suffix variant of the MAX6332UR18D3+.
Does the MAX6332UR18D3+ support operation below 1.0V supply voltage?
Yes, the MAX6332UR18D3+ is guaranteed to function correctly down to VCC = 0.7V, including valid RESET output assertion and timing. This capability is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables for the MAX6332/MAX6333 variants, and confirmed for the MAX6332UR18D3+ in the Ordering Information section.
What is the reset timeout period of the MAX6332UR18D3+ and how is it implemented?
The MAX6332UR18D3+ provides a minimum reset timeout period of 100ms (typical 150ms, maximum 200ms), factory-programmed via the "D3" suffix. This is an internal, temperature-compensated delay generated by an on-chip RC network - no external capacitor is required, and the timing remains stable across −40°C to +125°C.
Is the MAX6332UR18D3+ pin-compatible with other Maxim supervisory ICs?
The MAX6332UR18D3+ uses the standard 3-pin SOT23 package and shares identical pinout (GND, RESET, VCC) with MAX809/MAX810 and MAX6326/MAX6327/MAX6328. However, output polarity differs: MAX6332UR18D3+ is active-high, whereas MAX6326 is active-low - direct replacement requires verification of µP reset pin logic level requirements.
What is the supply current consumption of the MAX6332UR18D3+ at 1.8V?
At VCC = 1.8V and TA = +25°C, the MAX6332UR18D3+ draws 3.0µA (minimum), 3.3µA (typical), and 6.0µA (maximum) supply current, as specified in the Electrical Characteristics table. This ultra-low ICC enables multi-year operation in battery-powered applications such as portable instrumentation and remote sensors.
MAX6332UR18D3+ 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:
- 1.8V
- 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
MAX6332UR18D3+ FAQ
1.How can I place an order for MAX6332UR18D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6332UR18D3+ 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 MAX6332UR18D3+ reliable?
The price and inventory of MAX6332UR18D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6332UR18D3+ is usually 5 days.
3.What payment methods are accepted for MAX6332UR18D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6332UR18D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6332UR18D3+?
MAX6332UR18D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6332UR18D3+ 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 MAX6332UR18D3+?
For technical support, including MAX6332UR18D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6332UR18D3+ requirements.
6.How does Aetrix verify that MAX6332UR18D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6332UR18D3+ 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 MAX6332UR18D3+ meets industry standards.
7.What is the process for return or replacement of MAX6332UR18D3+?
All MAX6332UR18D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6332UR18D3+, 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 MAX6332UR18D3+ part is unused and in its original packaging.
Return procedure for MAX6332UR18D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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