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Analog Devices Inc./Maxim Integrated MAX6333UR16D3+T
- Part No.:
- MAX6333UR16D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR16D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,881
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Product details
Overview
MAX6333UR16D3+T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, monitoring 1.6V supply thresholds with 100ms minimum reset timeout, ultra-low 3.3µA supply current at 2.5V, and guaranteed operation down to VCC = 0.7V. It ensures reliable power-on/brownout reset for low-voltage embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6333UR16D3+T datasheet, MAX6333UR16D3+T pinout, MAX6333UR16D3+T application, or MAX6333UR16D3+T equivalent, this page delivers verified electrical parameters, validated SOT23-3 terminal mapping, confirmed reset timing behavior across -40°C to +125°C, and real-world alternative selection guidance for μP reset circuit design.
Technical Context
The MAX6333UR16D3+T implements a precision bandgap-based reset comparator with factory-trimmed 1.60V ±1.8% threshold (25°C) and ±3% over full temperature range, coupled to an internal timer generating a fixed 100ms minimum active-low reset pulse after VCC recovery. Its push/pull output drives CMOS inputs directly without external pull-up.
Designed for ultra-low-voltage systems, it maintains valid RESET assertion down to VCC = 0.7V and rejects transients ≤24µs at 10V/ms slew rate. The device operates across 0.7V–5.5V supply range and draws only 3.0–6.0µA at 1.8V–2.5V, enabling use in energy-constrained applications where supply rail collapse must trigger deterministic reset before logic corruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures accurate brownout detection for 1.8V systems |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP initialization sequences |
| Supply Current | 3.3µA typical at VCC = 2.5V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V rails |
| Output Type | Active-low push/pull - eliminates need for external pull-up resistor in most μP interfaces |
| Reset Propagation Delay | 24µs max at 10V/ms VCC fall rate - provides immunity to short supply glitches |
| Temperature Range | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6333UR16D3+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 0.8mm footprint and 0.95mm height. Pin 1 is GND, Pin 2 is RESET (active-low push/pull output), and Pin 3 is VCC. The package supports reflow soldering up to +260°C for lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver; must be connected to system ground plane |
| 2 | RESET | Active-low push/pull output; sinks current when asserted (low), sources current when deasserted (high); no external pull-up required |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference; accepts 0.7V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 1.6V Reset Threshold | Factory-trimmed to ±1.8% at +25°C and ±3% over full temperature range - eliminates manual calibration in production |
| 100ms Minimum Reset Pulse Width | Guaranteed minimum duration ensures μP reset register initialization completes before release |
| 0.7V Minimum Operating Voltage | Valid RESET assertion maintained even as VCC collapses below 1.0V - prevents premature release during brownout |
| 3.3µA Typical Supply Current | Enables integration into always-on sensor nodes and battery-backed systems without compromising runtime |
| Transient Immunity | Rejects VCC glitches ≤24µs at 10V/ms - avoids spurious resets in noisy power environments |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in harsh factory environments with fluctuating 24VDC-derived 3.3V supplies. IC Role / Device Role / Timing Role: Monitors 3.3V rail derived from switching regulator; asserts active-low RESET to ARM Cortex-M7 core during brownout. Use Value: Prevents firmware corruption by holding reset until VCC stabilizes above 1.60V and sustains 100ms clean-up window. |
Use Scenario: Remote environmental sensors powered by coin-cell batteries with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output feeding ultra-low-power MCU; triggers reset on battery voltage sag below 1.6V. Use Value: 3.3µA quiescent current extends battery life beyond 5 years while ensuring deterministic restart after deep discharge. |
| Automotive Body Control Modules | Medical Handheld Diagnostics |
Use Scenario: Under-dash modules exposed to cold cranking (VCC dip to 0.8V) and load dump transients. IC Role / Device Role / Timing Role: Provides fail-safe reset signal to Infineon AURIX TC3xx microcontroller during 12V battery instability. Use Value: Guaranteed operation down to 0.7V VCC and 24µs transient rejection prevent false resets during engine start. |
Use Scenario: Portable ECG analyzers requiring FDA-grade reliability and zero firmware corruption risk. IC Role / Device Role / Timing Role: Resets ADuCM360 analog front-end MCU upon Li-ion battery voltage drop below 1.6V threshold. Use Value: Factory-trimmed ±1.8% threshold accuracy ensures consistent reset point across production lots and temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR16D3+T | Same 1.6V threshold and 100ms timeout, but specified only to +85°C ambient; lower cost due to reduced temp grade | Not qualified for automotive under-hood or industrial extended-temp use cases requiring -40°C to +125°C operation | Select when full industrial temperature range is not required and BOM cost optimization is critical |
| TPS3808G16DBVR | 1.6V threshold with 200ms min timeout; higher 8µA ICC; requires external pull-up for open-drain variant (not applicable here) | Higher quiescent current reduces battery lifetime; longer timeout may delay system boot in time-critical applications | Choose if longer reset hold time is needed and higher supply current is acceptable |
Compared with MAX6333UR16D3+T, MAX6326UR16D3+T sacrifices extended temperature qualification for cost savings, while TPS3808G16DBVR trades higher ICC and longer tRP for broader TI ecosystem support and alternate packaging options.
Availability
MAX6333UR16D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6333UR16D3+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) designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications, with emphasis on high-reliability power management and interface solutions.
The MAX6333 series belongs to Maxim's ultra-low-voltage supervisory product line, engineered specifically for deterministic reset generation in 1.8V/2.5V systems where supply collapse must trigger immediate and sustained processor reset.
FAQ
What is the exact reset threshold voltage for MAX6333UR16D3+T?
The MAX6333UR16D3+T has a factory-trimmed nominal reset threshold of 1.60V at +25°C, with tolerance of ±1.8% at room temperature and ±3% over the full -40°C to +125°C operating range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "UR16" suffix variant of the MAX6333UR16D3+T.
Does MAX6333UR16D3+T require an external pull-up resistor on the RESET pin?
No, MAX6333UR16D3+T does not require an external pull-up resistor because it features a push/pull output stage. The RESET pin actively drives high (VOH ≥ 0.8×VCC) when deasserted and low (VOL ≤ 0.3V at ISINK = 500µA) when asserted, eliminating reliance on external biasing components.
What is the minimum VCC voltage at which MAX6333UR16D3+T guarantees valid RESET output?
MAX6333UR16D3+T guarantees correct RESET state down to VCC = 0.7V across the full -40°C to +125°C temperature range. This is explicitly stated in the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables for the MAX6333 variant, distinguishing it from the MAX6334 (1.0V minimum).
How long is the reset timeout period for MAX6333UR16D3+T?
The MAX6333UR16D3+T provides a minimum reset timeout period of 100ms after VCC rises above the 1.60V threshold. This value is fixed by internal timing circuitry and is specified as tRP = 100ms (min), 150ms (typ), 200ms (max) in the Electrical Characteristics table under "Reset Active Timeout Period" for the "D3" suffix.
Is MAX6333UR16D3+T pin-compatible with other supervisory ICs?
Yes, MAX6333UR16D3+T is pin-compatible with the MAX809/MAX810 and MAX6326/MAX6327/MAX6328 families in the SOT23-3 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC - identical terminal mapping enables drop-in replacement where voltage threshold and timeout match system requirements.
MAX6333UR16D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR16D3+T FAQ
1.How can I place an order for MAX6333UR16D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR16D3+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 MAX6333UR16D3+T reliable?
The price and inventory of MAX6333UR16D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR16D3+T is usually 5 days.
3.What payment methods are accepted for MAX6333UR16D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR16D3+T transactions.
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4.How is shipping managed for MAX6333UR16D3+T?
MAX6333UR16D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR16D3+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 MAX6333UR16D3+T?
For technical support, including MAX6333UR16D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR16D3+T requirements.
6.How does Aetrix verify that MAX6333UR16D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6333UR16D3+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 MAX6333UR16D3+T meets industry standards.
7.What is the process for return or replacement of MAX6333UR16D3+T?
All MAX6333UR16D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR16D3+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 MAX6333UR16D3+T part is unused and in its original packaging.
Return procedure for MAX6333UR16D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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