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Analog Devices Inc./Maxim Integrated MAX6332UR20D3+T
- Part No.:
- MAX6332UR20D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6332UR20D3+T.pdf
- Description:
- IC MPU/RESET CIRC 2.00V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
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Product details
Overview
The MAX6332UR20D3+T 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 1.8V–3.3V digital systems. It monitors VCC and asserts RESET high when supply voltage falls below 2.00V (±1.8% at +25°C), holding it for ≥100ms after VCC recovers - enabling robust brownout protection in battery-powered controllers and embedded instrumentation.
For engineers reviewing the MAX6332UR20D3+T datasheet, MAX6332UR20D3+T pinout, MAX6332UR20D3+T application, or MAX6332UR20D3+T equivalent, key selection criteria include its 2.0V factory-trimmed reset threshold, 100ms minimum timeout, ultra-low 0.7V operating capability, 3.3µA supply current, and guaranteed RESET validity down to VCC = 0.7V - critical for low-voltage portable and industrial control designs.
Technical Context
The MAX6332UR20D3+T implements a precision bandgap-based reset comparator with factory-trimmed 2.00V threshold (±1.8% at +25°C, ±3% over –40°C to +125°C) and internal timeout timer generating ≥100ms active-high reset pulse. Its push/pull output drives high to VCC (≥0.8×VCC at 200µA) and low to ≤0.3V (at 500µA), ensuring clean logic-level signaling without external pull-ups.
It operates from 0.7V to 5.5V supply, draws only 3.0–6.0µA at 1.8V/2.5V, and rejects fast VCC transients via comparator hysteresis and propagation delay filtering (24µs typical at 10V/ms fall rate). The device is fully specified across –40°C to +125°C and requires no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±1.8% at +25°C; ensures reliable detection of 2.0V supply brownout before system instability |
| Reset Timeout Period | ≥100ms; guarantees sufficient hold time for μP initialization and memory stabilization |
| Supply Voltage Range | 0.7V to 5.5V; supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V rails |
| Supply Current | 3.3µA typical at 2.5V; enables multi-year battery life in always-on monitoring applications |
| 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 Falling Delay | 24µs typical; filters sub-30µs noise spikes while responding promptly to sustained undervoltage |
Pinout & Package
MAX6332UR20D3+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 = GND, Pin 2 = RESET (active-high push/pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-high reset output | Drives high (≥0.8×VCC) during reset assertion; sinks ≤0.3V when deasserted; directly interfaces μP reset input without pull-up |
| VCC (Pin 3) | Power supply input | Supplies internal circuitry and defines reset threshold reference; accepts 0.7V–5.5V; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.00V reset threshold | Eliminates external resistor network and calibration; reduces BOM count and layout area in space-constrained SOT23 designs |
| 100ms minimum reset timeout | Ensures full μP boot sequence completion, including flash initialization and peripheral configuration, even under slow-rising VCC |
| 0.7V minimum operating voltage | Guarantees valid RESET assertion during deep brownout events where VCC drops below 1.0V - critical for fail-safe shutdown |
| 3.3µA supply current at 2.5V | Enables integration into energy-harvesting and coin-cell-powered devices without compromising battery runtime |
| Transient-immune reset comparator | Rejects <30µs negative VCC glitches up to 200mV overdrive, preventing spurious resets in electrically noisy industrial environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring fail-safe reset during low-battery brownout. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output and asserts active-high RESET to ARM Cortex-M0 microcontroller upon VCC drop below 2.00V. Use Value: Prevents corrupted sensor readings or unsafe actuation by guaranteeing ≥100ms reset hold time and valid output down to 0.7V supply. |
Use Scenario: DIN-rail mounted I/O modules exposed to 24V rail transients and wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervises 3.3V FPGA configuration supply and triggers system-wide reset on undervoltage, synchronized with watchdog timeout. Use Value: Ensures deterministic recovery after power interruption with ±3% threshold stability over –40°C to +125°C and immunity to 10V/ms VCC transients. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Low-voltage subsystems (e.g., door module MCU) powered from switched 3.3V rail subject to load-dump-induced sags. IC Role / Device Role / Timing Role: Provides active-high reset signal to Infineon AURIX TC2xx microcontroller, compatible with its bidirectional reset pin architecture. Use Value: Push/pull output eliminates external pull-up, reducing component count and PCB area while maintaining reset validity during 0.7–1.0V supply collapse. |
Use Scenario: Revenue-grade electricity meters with tamper detection and real-time clock backup powered by supercapacitor during AC loss. IC Role / Device Role / Timing Role: Monitors 1.8V RTC supply and initiates controlled shutdown sequence via active-high RESET to metering SoC when voltage falls below 2.00V. Use Value: Ultra-low 3.3µA quiescent current extends supercapacitor hold-up time; 100ms timeout allows safe EEPROM write completion before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory 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 | Compatible with μPs needing active-low reset or bidirectional reset pins (e.g., Motorola 68HC11) | Select when interfacing legacy μPs with open-drain reset requirements or shared reset bus architectures |
| TPS3808G20DBVR | 2.0V threshold, 200ms timeout, push/pull active-low output; higher 8µA ICC; supports enable input | Offers programmable enable control and longer timeout, but lacks 0.7V operation and active-high output | Choose when system requires gated reset assertion or extended hold time, and active-low interface is acceptable |
Compared with MAX6332UR20D3+T, MAX6327UT20D3+T provides identical threshold/timing but mandates external pull-up and active-low polarity, while TPS3808G20DBVR adds enable functionality at the cost of higher current and no sub-1V operation - making MAX6332UR20D3+T optimal for ultra-low-voltage, active-high, minimal-BOM designs.
Availability
MAX6332UR20D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6332UR20D3+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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX6332 series belongs to Maxim's ultra-low-voltage μP supervisory product line, engineered specifically for reliable reset generation in battery-powered and harsh-environment systems where supply rails dip below 1.0V and timing precision is critical.
FAQ
What is the exact reset threshold voltage of the MAX6332UR20D3+T and how tightly is it specified?
The MAX6332UR20D3+T has a factory-trimmed nominal reset threshold of 2.00V, with a tolerance of ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This specification ensures precise brownout detection without external calibration, and the value is confirmed in Table 1 of the official datasheet under suffix "UR20D_".
Does the MAX6332UR20D3+T support operation below 1.0V, and what happens to RESET output at low VCC?
Yes, the MAX6332UR20D3+T is guaranteed to operate down to 0.7V VCC and maintains valid RESET output (high during reset, low otherwise) throughout that range. At VCC < 0.7V, output drive weakens; a 100kΩ pull-up to VCC (as recommended in the datasheet Figure 2b) ensures RESET remains high down to VCC = 0, preserving fail-safe behavior.
What is the reset timeout period of the MAX6332UR20D3+T, and is it adjustable?
The MAX6332UR20D3+T provides a fixed minimum reset timeout period of 100ms, as indicated by the "D3" suffix in its part number. This timeout is factory-programmed and non-adjustable; it begins when VCC rises above the 2.00V threshold and ensures sufficient hold time for microprocessor initialization and memory stabilization.
How does the MAX6332UR20D3+T handle fast VCC transients, and what is its immunity level?
The MAX6332UR20D3+T incorporates a transient-immune reset comparator that rejects short-duration negative-going VCC glitches. According to the Typical Operating Characteristics graph (toc04), it tolerates a 200mV overdrive transient up to ~30µs duration without asserting reset - effectively filtering common switching noise and load-dump artifacts in industrial and automotive power rails.
Is the MAX6332UR20D3+T pin-compatible with other supervisory ICs, and which ones?
Yes, the MAX6332UR20D3+T is pin-compatible with the MAX809/MAX810 and MAX6326/MAX6327/MAX6328 families in the 3-pin SOT23 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. However, output polarity and timing differ: MAX6332UR20D3+T delivers active-high RESET, whereas MAX809 is active-low, requiring schematic review before substitution.
MAX6332UR20D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Product Status:
- Obsolete
- 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+T FAQ
1.How can I place an order for MAX6332UR20D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6332UR20D3+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 MAX6332UR20D3+T reliable?
The price and inventory of MAX6332UR20D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6332UR20D3+T is usually 5 days.
3.What payment methods are accepted for MAX6332UR20D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6332UR20D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6332UR20D3+T?
MAX6332UR20D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6332UR20D3+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 MAX6332UR20D3+T?
For technical support, including MAX6332UR20D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6332UR20D3+T requirements.
6.How does Aetrix verify that MAX6332UR20D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6332UR20D3+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 MAX6332UR20D3+T meets industry standards.
7.What is the process for return or replacement of MAX6332UR20D3+T?
All MAX6332UR20D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6332UR20D3+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 MAX6332UR20D3+T part is unused and in its original packaging.
Return procedure for MAX6332UR20D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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