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Analog Devices Inc./Maxim Integrated MAX6354UWUK
- Part No.:
- MAX6354UWUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6354UWUK.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,522
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Product details
Overview
MAX6354UWUK from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, precision factory-set thresholds of 2.78V (VCC1) and 1.67V (VCC2), 20µA supply current, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. It enables reliable power-on reset and undervoltage detection in multivoltage embedded systems such as portable instrumentation and industrial controllers.
For engineers reviewing the MAX6354UWUK datasheet, MAX6354UWUK pinout, MAX6354UWUK application, or MAX6354UWUK equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Maxim's official specifications for the MAX6354UWUK variant.
Technical Context
The MAX6354UWUK monitors two independent supply rails (VCC1 and VCC2) and asserts its single active-low push-pull RST2 output when either falls below its respective threshold (2.78V/1.67V). Its reset timeout period is guaranteed 100–280ms, and it maintains valid reset state as long as at least one supply remains ≥1.0V.
It features a debounced TTL/CMOS-compatible manual-reset input (MR), supports no external components in dual-rail systems, and operates across –40°C to +85°C. Unlike MAX6358–MAX6360 variants, it does not include watchdog timer functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.78V ±0.08V (–40°C to +85°C); precise trip point for primary supply monitoring |
| VCC2 Threshold | 1.67V ±0.05V (–40°C to +85°C); accurate low-voltage rail supervision |
| Supply Current | 20µA typical; enables ultra-low-power operation in battery-backed systems |
| Reset Timeout | 100–280ms; ensures sufficient processor initialization time after power-up |
| RESET Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; guarantees functional reset even during deep brownout |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended-temperature environments |
| Package | 5-pin SOT23; compact footprint compatible with high-density PCB layouts |
Pinout & Package
MAX6354UWUK is housed in a 5-pin SOT23 package (U5-1 outline, land pattern 90-0174), with pins arranged in standard top-view configuration: Pin 1 = RST2 (active-low push-pull reset referenced to VCC2), Pin 2 = GND, Pin 3 = MR (manual reset input), Pin 4 = VCC2, Pin 5 = VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST2) | Active-low push-pull reset output | Referenced to VCC2; drives low without external pull-up; asserts when VCC1 < 2.78V or VCC2 < 1.67V |
| 2 (GND) | Ground reference | Common return path for internal comparators and output stage |
| 3 (MR) | Manual-reset input | Debounced TTL/CMOS-compatible; pulling low forces immediate reset assertion |
| 4 (VCC2) | Secondary supply input & monitor rail | Powers device when > VCC1; monitored at 1.67V threshold; defines RST2 reference |
| 5 (VCC1) | Primary supply input & monitor rail | Powers device when > VCC2; monitored at 2.78V threshold; enables reset validity down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage monitoring | Simultaneously supervises VCC1 (2.78V) and VCC2 (1.67V) with independent thresholds |
| Push-pull RST2 output | Eliminates need for external pull-up resistor; directly drives µP reset pin with strong low/high states |
| 1.0V minimum supply support | Guarantees valid reset assertion even if either supply sags to 1.0V - critical for brownout resilience |
| 20µA quiescent current | Enables integration into always-on, battery-powered subsystems without significant drain |
| 100ms min POR pulse width | Meets or exceeds typical microprocessor reset timing requirements for reliable boot sequencing |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered handheld glucose meters requiring stable reset during Li-ion discharge from 3.6V to 2.8V while also monitoring 1.8V logic rail. IC Role / Device Role / Timing Role: MAX6354UWUK supervises both rails (VCC1 = 2.78V, VCC2 = 1.67V), asserting RST2 to hold MCU in reset until both supplies stabilize post-power-up or brownout recovery. Use Value: Prevents erratic MCU execution during partial power loss; eliminates need for discrete reset ICs or RC networks. |
Use Scenario: DIN-rail mounted PLC modules operating from 24V DC converted to 3.3V and 1.8V rails in harsh factory environments. IC Role / Device Role / Timing Role: MAX6354UWUK acts as dual-supply guardian, detecting dips on either rail and triggering controlled system reset via RST2 before firmware corruption occurs. Use Value: Ensures deterministic restart after voltage transients; supports extended temperature range (–40°C to +85°C) without derating. |
| Smart Energy Meters | Automotive Body Control Units |
|
Use Scenario: Revenue-grade electricity meters with isolated 3.3V communication interface and 1.2V analog front-end, powered from wide-input DC-DC. IC Role / Device Role / Timing Role: MAX6354UWUK monitors main 3.3V rail (VCC1) and auxiliary 1.67V reference rail (VCC2), providing synchronized reset to meter SoC and ADC subsystems. Use Value: Guarantees simultaneous reset assertion across domains; avoids metastability in mixed-voltage data paths. |
Use Scenario: Low-power BCM modules using 5V supply stepped down to 2.8V (VCC1) and 1.65V (VCC2) for CAN transceiver and microcontroller core. IC Role / Device Role / Timing Role: MAX6354UWUK provides rail-specific supervision with tight threshold tolerances (±0.05V on VCC2), ensuring CAN bus integrity during cold-crank events. Use Value: Maintains reset validity down to 1.0V on either rail - essential for surviving automotive cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6354UVUK | VCC1 = 2.78V, VCC2 = 1.58V (vs. 1.67V); tighter VCC2 hysteresis (±0.03V vs. ±0.05V) | Better suited for systems requiring lower secondary threshold, e.g., 1.5V logic rails | Select UVUK when VCC2 nominal is 1.5V and tighter tolerance is needed; UWUK preferred for 1.65V/1.67V rails. |
| MAX6353UWUK | RST output referenced to VCC1 (not VCC2); same thresholds (2.78V/1.67V); identical pinout except RST location | Used where reset must be referenced to primary rail (e.g., driving legacy µP with VCC1-synchronized reset input) | Choose UWUK for VCC2-referenced reset drive; choose MAX6353UWUK only if system requires VCC1-referenced assertion. |
Compared with MAX6354UVUK and MAX6353UWUK, the MAX6354UWUK uniquely balances 1.67V secondary threshold accuracy, VCC2-referenced push-pull drive, and industrial temperature support - making it optimal for 1.65V–1.8V rail supervision in space-constrained designs.
Availability
MAX6354UWUK is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart energy meters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6354UWUK 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, computing, and communications markets.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor supervision in space- and power-constrained systems, delivering precision dual-rail monitoring with minimal external components.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6354UWUK?
The MAX6354UWUK has a factory-set VCC1 threshold of 2.78V (±0.08V over –40°C to +85°C) and a VCC2 threshold of 1.67V (±0.05V over the same range). These values are laser-trimmed during production and documented in Maxim's Electrical Characteristics table under "VCC1 Threshold" and "VCC2 Threshold" for suffix "UW".
Does the MAX6354UWUK include a watchdog timer function?
No, the MAX6354UWUK does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the family. The MAX6354UWUK provides only dual-voltage monitoring, manual reset, and a single VCC2-referenced push-pull reset output (RST2).
What is the pin configuration and package type of the MAX6354UWUK?
The MAX6354UWUK uses a 5-pin SOT23 package (outline U5-1, land pattern 90-0174) with pinout: Pin 1 = RST2 (active-low push-pull), Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1. This matches the MAX6352/MAX6353/MAX6354 series pin mapping shown in the Maxim datasheet Figure 9.
Can the MAX6354UWUK operate with supply voltages below 2.0V?
Yes - the MAX6354UWUK guarantees valid reset operation as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. Its specified operating range is VCC1/VCC2 = 1.2V to 5.5V (–40°C to +85°C), and it maintains correct RST2 assertion and release behavior down to 1.0V on either rail, enabling robust brownout response.
How does the manual reset (MR) input behave on the MAX6354UWUK?
The MR input on the MAX6354UWUK is debounced and TTL/CMOS-compatible. Pulling MR low forces immediate RST2 assertion; RST2 remains active for the full reset timeout period (100–280ms) after MR returns high. MR must not exceed VCC1 voltage, and it can be left unconnected or tied to VCC1 if unused.
MAX6354UWUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, 2.78V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6354UWUK FAQ
1.How can I place an order for MAX6354UWUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6354UWUK 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 MAX6354UWUK reliable?
The price and inventory of MAX6354UWUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6354UWUK is usually 5 days.
3.What payment methods are accepted for MAX6354UWUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6354UWUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6354UWUK?
MAX6354UWUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6354UWUK 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 MAX6354UWUK?
For technical support, including MAX6354UWUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6354UWUK requirements.
6.How does Aetrix verify that MAX6354UWUK is sourced from the original manufacturer or authorized distributors?
All MAX6354UWUK 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 MAX6354UWUK meets industry standards.
7.What is the process for return or replacement of MAX6354UWUK?
All MAX6354UWUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX6354UWUK, 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 MAX6354UWUK part is unused and in its original packaging.
Return procedure for MAX6354UWUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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