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Analog Devices Inc./Maxim Integrated MAX6352TWUK+T
- Part No.:
- MAX6352TWUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6352TWUK+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
The MAX6352TWUK+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, featuring active-low open-drain reset output referenced to VCC1, precision factory-set thresholds of 3.08V (VCC1) and 1.67V (VCC2), 20µA supply current, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - used for reliable power-on reset and undervoltage detection in multivoltage embedded systems.
For engineers reviewing the MAX6352TWUK+T datasheet, MAX6352TWUK+T pinout, MAX6352TWUK+T application, or MAX6352TWUK+T equivalent, key selection criteria include dual-supply threshold accuracy, open-drain reset drive capability, manual-reset debouncing, temperature-stable reset timeout (100–280ms), and compatibility with 1.2V–5.5V supply ranges across -40°C to +85°C.
Technical Context
The MAX6352TWUK+T monitors two independent supply rails (VCC1 and VCC2) and asserts its open-drain RST output when either drops below its respective factory-trimmed threshold (3.08V/1.67V). Reset remains valid as long as at least one supply exceeds +1.0V, enabling robust brownout detection during asymmetric rail collapse.
It integrates a debounced TTL/CMOS-compatible manual-reset input (MR), supports no external components for dual-rail supervision, and guarantees reset pulse width ≥100ms with ±20ppm/°C threshold tempco - ensuring deterministic timing behavior over industrial temperature range without calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V (25°C); ensures precise +3.3V rail monitoring with 3.00–3.15V tolerance over -40°C to +85°C |
| VCC2 Threshold | 1.67V ±0.05V (25°C); enables accurate supervision of low-voltage logic rails such as +1.8V or +1.65V I/O domains |
| Supply Current | 20µA typical (VCC1=5.5V, VCC2=3.6V); supports ultra-low-power battery-backed systems and always-on monitoring |
| Reset Timeout | 100–280ms; guarantees minimum 100ms reset assertion for safe microprocessor initialization across voltage and temperature |
| RESET Valid Range | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; maintains functional reset state during deep brownout conditions where one rail collapses first |
| Reset Output Type | Active-low open-drain; allows wired-OR configuration, level shifting via external pull-up, and compatibility with diverse µP reset inputs |
| Operating Temp | -40°C to +85°C; fully specified and production-tested for industrial-grade reliability without derating |
Pinout & Package
MAX6352TWUK+T is housed in a RoHS-compliant 5-pin SOT23 package (U5-1 outline, 90-0174 land pattern), with 1.27mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted - optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Asserts low when VCC1 < 3.08V or VCC2 < 1.67V; requires external pull-up to VCC1 or system reset rail; compatible with bidirectional µP reset pins via 4.7kΩ series resistor |
| 2 - GND | Ground reference | Common return path for both supply monitors and internal comparators; must be low-impedance connection to minimize noise-induced false resets |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internally debounced; remains asserted for full timeout after release; leave unconnected or tie to VCC1 if unused |
| 4 - VCC2 | Secondary supply input & monitor | Monitors 1.67V rail; powers device when VCC2 > VCC1; voltage must stay within -0.3V to +6V absolute max rating |
| 5 - VCC1 | Primary supply input & monitor | Monitors 3.08V rail; powers device when VCC1 > VCC2; supplies internal logic and RST pull-down driver; supports 1.2V–5.5V operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises 3.08V and 1.67V rails with separate trip points - eliminates need for two discrete supervisors in mixed-voltage SoC or FPGA power domains |
| Open-drain RST with wide valid range | RST remains functional even if VCC1 or VCC2 drops to 1.0V - enables fail-safe reset assertion during partial power loss scenarios |
| 20µA ultra-low quiescent current | Reduces standby power in battery-powered instruments and portable equipment without compromising reset accuracy or response time |
| 100ms min POR pulse width | Guarantees sufficient reset hold time for slow-starting microcontrollers and peripherals, eliminating race conditions during boot |
| Factory-trimmed precision thresholds | ±0.08V initial accuracy at 25°C and ±0.15V over full temperature range - removes need for external resistor dividers or calibration |
Applications
| Industrial PLC Controllers | Portable Medical Sensors |
|---|---|
Use Scenario: Monitoring dual power rails (3.3V MCU core and 1.8V sensor interface) in programmable logic controllers exposed to voltage sags and EMI. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting open-drain reset to halt CPU execution and prevent corrupted register writes during brownout. Use Value: Prevents firmware lockup by guaranteeing ≥100ms reset pulse and maintaining RST validity down to 1.0V on either rail - critical for safety-critical control loops. | Use Scenario: Power sequencing and fault detection in handheld glucose meters with lithium coin-cell backup and low-noise analog front-end. IC Role / Device Role / Timing Role: Supervising main 3.08V LDO output and 1.67V analog reference rail to ensure clean startup and detect battery depletion before measurement error occurs. Use Value: 20µA supply current extends battery life; precision 3.08V/1.67V thresholds match common LDO and ADC reference voltages - eliminating design margin guesswork. |
| FPGA Configuration Systems | Smart Energy Meters |
Use Scenario: Ensuring correct configuration sequence for Xilinx Artix-7 FPGAs requiring stable 3.3V I/O and 1.8V core supplies before bitstream loading. IC Role / Device Role / Timing Role: Dual-rail supervisor generating synchronized reset signal to FPGA PROG_B and DONE pins via open-drain wired-OR topology. Use Value: Open-drain RST allows direct interfacing with FPGA reset inputs without level-shifting; guaranteed 100ms pulse prevents premature configuration abort due to rail ripple. | Use Scenario: Supervising isolated +3.08V communication rail and +1.67V metrology ASIC supply in ANSI C12.22-compliant electricity meters operating in harsh grid environments. IC Role / Device Role / Timing Role: Detecting simultaneous or sequential undervoltage events on AC/DC converter outputs and isolated DC-DC secondaries to trigger secure shutdown and tamper logging. Use Value: -40°C to +85°C operation and ±20ppm/°C tempco ensure consistent trip points across outdoor temperature swings - meeting ANSI C12.20 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6352SWUK+T | VCC1 threshold = 2.93V (vs. 3.08V); VCC2 threshold = 1.67V unchanged | Better suited for systems using 2.8V or 2.9V main I/O rails instead of 3.3V | Select when primary supply is 2.9V nominal and tighter 2.85–3.00V threshold window is required |
| MAX6352UWUK+T | VCC1 threshold = 2.78V (vs. 3.08V); VCC2 threshold = 1.67V unchanged | Optimized for 2.7V–2.8V logic families and low-power microcontrollers with reduced VDDIO | Choose for battery-powered devices where main rail operates near 2.7V and 2.70–2.85V trip point improves margin |
Compared with MAX6352SWUK+T and MAX6352UWUK+T, the MAX6352TWUK+T provides the highest VCC1 threshold (3.08V) in the 5-pin SOT23 family - making it the preferred choice for legacy 3.3V systems, industrial interfaces, and designs requiring maximum noise immunity on the primary rail.
Availability
MAX6352TWUK+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, and FPGA configuration systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6352TWUK+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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6351–MAX6360 product line delivers dual- and triple-voltage microprocessor supervisors with factory-trimmed thresholds, ultra-low power, and industrial temperature support - targeting reliable power sequencing and fault detection in multirail embedded systems.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6352TWUK+T?
The MAX6352TWUK+T has a factory-trimmed VCC1 threshold of 3.08V (±0.08V at +25°C, ±0.15V over -40°C to +85°C) and VCC2 threshold of 1.67V (±0.05V at +25°C, ±0.09V over temperature). These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet, and correspond directly to the "TW" suffix in the part number.
Does the MAX6352TWUK+T include a watchdog timer function?
No, the MAX6352TWUK+T does not include a watchdog timer. Watchdog functionality is only present in the MAX6358/MAX6359/MAX6360 variants (6-pin SOT23). The MAX6352TWUK+T belongs to the MAX6352 subgroup - a 5-pin open-drain dual-supply supervisor with manual reset but no WDI pin or timeout circuitry.
Can the MAX6352TWUK+T operate with VCC1 = 1.2V and still assert a valid reset?
Yes, the MAX6352TWUK+T guarantees RESET output validity as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. At VCC1 = 1.2V (above the 1.0V minimum), the internal comparators remain functional and will assert RST if VCC1 falls below 3.08V or VCC2 falls below 1.67V - enabling brownout detection even during deep undervoltage conditions.
What is the recommended pull-up resistor value for the open-drain RST output of the MAX6352TWUK+T?
A 10kΩ to 100kΩ pull-up resistor to VCC1 (or system reset rail) is recommended for the MAX6352TWUK+T's open-drain RST output. The datasheet specifies VOL ≤ 0.3V at ISINK = 50µA (VCC ≥ 1.2V), supporting robust low-state drive; 47kΩ is commonly used to balance speed, power, and noise immunity in industrial designs.
Is the MAX6352TWUK+T pin-compatible with other MAX6352 variants like MAX6352SWUK+T?
Yes, all MAX6352-x variants (including MAX6352TWUK+T, MAX6352SWUK+T, and MAX6352UWUK+T) share identical 5-pin SOT23 pinout, electrical interface, and functional architecture - differing only in factory-set voltage thresholds. No PCB layout changes are required when substituting between these parts for threshold tuning.
MAX6352TWUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6352TWUK+T FAQ
1.How can I place an order for MAX6352TWUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6352TWUK+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 MAX6352TWUK+T reliable?
The price and inventory of MAX6352TWUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6352TWUK+T is usually 5 days.
3.What payment methods are accepted for MAX6352TWUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6352TWUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6352TWUK+T?
MAX6352TWUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6352TWUK+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 MAX6352TWUK+T?
For technical support, including MAX6352TWUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6352TWUK+T requirements.
6.How does Aetrix verify that MAX6352TWUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6352TWUK+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 MAX6352TWUK+T meets industry standards.
7.What is the process for return or replacement of MAX6352TWUK+T?
All MAX6352TWUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6352TWUK+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 MAX6352TWUK+T part is unused and in its original packaging.
Return procedure for MAX6352TWUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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