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Analog Devices Inc./Maxim Integrated MAX6354LSUK-T
- Part No.:
- MAX6354LSUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6354LSUK-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6354LSUK-T 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 4.63V (VCC1) and 2.93V (VCC2), 20µA supply current, and guaranteed RESET validity down to VCC2 = 1.0V. It monitors two independent power rails in multivoltage embedded systems to ensure reliable boot and fault detection.
For engineers reviewing the MAX6354LSUK-T datasheet, MAX6354LSUK-T pinout, MAX6354LSUK-T application, or MAX6354LSUK-T equivalent, key selection criteria include dual-supply threshold accuracy, reset output referencing scheme (VCC2), manual-reset debouncing, temperature-stable hysteresis, and compatibility with 5-pin SOT23 layout constraints.
Technical Context
The MAX6354LSUK-T implements dual independent voltage comparators with ±0.04V threshold tolerance at +25°C and ±0.15V over -40°C to +85°C, each feeding a glitch-filtered reset generator. Its single active-low push-pull RST output is driven from VCC2, enabling direct interface to logic referenced to the lower rail.
No watchdog timer or third-voltage monitor is present-this variant belongs to the MAX6354 subgroup (5-pin SOT23, VCC2-referenced RST, no WDI/RSTIN), distinguishing it from MAX6358–MAX6360 (watchdog) and MAX6355–MAX6357 (RSTIN). Reset assertion occurs if either VCC1 < 4.50V or VCC2 < 2.85V across full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±0.09V at +25°C; ensures reliable reset assertion when primary 5V/4.5V rail drops below safe operating level |
| VCC2 Threshold | 2.93V ±0.05V at +25°C; precisely monitors secondary 3.3V/3.0V rail without external components |
| Supply Current | 20µA typical; enables use in battery-backed or ultra-low-power systems without significant quiescent drain |
| Reset Pulse Width | 100ms minimum; guarantees sufficient duration for microprocessor initialization and state clearing |
| RESET Validity Range | Valid down to VCC2 = 1.0V; maintains asserted reset state during brownout until backup supply collapses |
| Operating Temp | -40°C to +85°C; fully specified for industrial-grade embedded applications without derating |
| Reset Hysteresis | Typical 500mV; prevents chatter during slow supply recovery by requiring ~0.5V rise before deassertion |
Pinout & Package
MAX6354LSUK-T is housed in a 5-pin SOT23 package (U5-1 outline, 21-0057), footprint-compatible with industry-standard 5-pin supervisory ICs and optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC2; drives low to 0.3V @ 1.2mA; requires no external pull-up; directly interfaces to VCC2-domain logic |
| 2 - GND | Ground reference | Common return path for both supply monitors and reset driver; must be low-impedance for noise immunity |
| 3 - MR | Debounced manual-reset input | TTL/CMOS-compatible; asserted low forces reset; internal 32–100kΩ pull-up eliminates need for external resistor |
| 4 - VCC2 | Secondary supply input & monitor | Powers device when VCC2 > VCC1; sets RST output reference; monitored at 2.93V threshold |
| 5 - VCC1 | Primary supply input & monitor | Powers device when VCC1 > VCC2; monitored at 4.63V threshold; enables reset if either rail fails |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously tracks VCC1 (4.63V) and VCC2 (2.93V) with separate comparators-no shared reference or calibration drift |
| VCC2-referenced push-pull RST | Eliminates level-shifting requirements when driving reset inputs tied to the 3.3V/2.93V domain |
| Guaranteed operation down to 1.0V VCC2 | Ensures fail-safe reset assertion even during deep brownout of secondary supply-critical for nonvolatile memory protection |
| 20µA ultra-low supply current | Reduces system standby power by >95% vs. discrete resistor-zener solutions; extends battery life in portable equipment |
| 100ms min reset pulse width | Meets JEDEC JESD78 reliability requirements for microprocessor reset timing across voltage and temperature extremes |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Monitoring 5V main logic rail and 3.3V I/O rail in programmable logic controller modules subject to EMI and thermal cycling. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-low reset to ARM Cortex-M7 MCU when either rail dips below specification during field operation. Use Value: Prevents firmware corruption and undefined state by guaranteeing 100ms reset pulse even during 1.2V VCC2 brownout-enabling certified functional safety compliance. | Use Scenario: Power sequencing and fault detection in battery-powered ultrasound probe electronics with strict low-power budget. IC Role / Device Role / Timing Role: Supervises 4.5V analog front-end supply and 2.93V digital core supply, triggering reset on undervoltage before ADC/DAC lockup. Use Value: 20µA quiescent current extends single-charge battery life by >300 hours versus discrete solutions-meeting IEC 62304 Class C runtime requirements. |
| Automotive Body Control Modules | Industrial IoT Edge Gateways |
Use Scenario: Monitoring 5V CAN transceiver supply and 3.3V microcontroller supply in under-hood ECUs exposed to -40°C to +105°C ambient. IC Role / Device Role / Timing Role: Dual-threshold supervisor providing reset signal referenced to 3.3V domain to ensure correct logic-level compatibility with MCU reset pin. Use Value: Guaranteed -40°C to +85°C operation with ±0.15V threshold stability eliminates need for external calibration-reducing BOM count and qualification effort. | Use Scenario: Ensuring clean boot and runtime supervision of dual-rail SoC (5V PCIe switch + 3.3V application processor) in fanless edge servers. IC Role / Device Role / Timing Role: Fault-detection circuit asserting reset to SoC's POR pin when either supply violates its threshold during thermal throttling events. Use Value: Push-pull RST referenced to VCC2 avoids weak-pull issues seen with open-drain alternatives-ensuring robust reset drive into 10pF+ load capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353LSUK-T | RST output referenced to VCC1 instead of VCC2; identical thresholds and package | Suitable when reset must be referenced to primary (higher) rail rather than secondary rail | Select MAX6353LSUK-T only if interfacing to VCC1-domain logic; MAX6354LSUK-T is required for VCC2-referenced reset loads |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no dual-threshold capability; 350ms reset timeout | Lacks VCC1 monitoring-requires separate IC for 4.63V rail, increasing board area and cost | Use only in single-rail systems; not a functional substitute for dual-monitoring requirement of MAX6354LSUK-T |
Compared with MAX6353LSUK-T, MAX6354LSUK-T provides VCC2-referenced reset drive essential for interfacing with low-voltage peripherals; compared with TPS3808G33DBVR, it delivers integrated dual-rail monitoring with matched temperature coefficients-reducing design risk and component count in multivoltage systems.
Availability
MAX6354LSUK-T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, and industrial IoT edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6354LSUK-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, communications, and computing applications, with emphasis on high-reliability power management and interface solutions.
The MAX6351–MAX6360 family was engineered specifically for multivoltage microprocessor systems requiring simultaneous, independent monitoring of two or three supply rails with minimal external components and guaranteed operation across harsh environments.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6354LSUK-T?
The MAX6354LSUK-T has a factory-set VCC1 threshold of 4.63V (±0.09V at +25°C, ±0.13V over -40°C to +85°C) and a VCC2 threshold of 2.93V (±0.05V at +25°C, ±0.08V over temperature). These values are confirmed in the Voltage-Threshold Levels table and Electrical Characteristics section of the official datasheet, and correspond to the "LS" suffix in the MAX6354_ _UK-T ordering code.
Does the MAX6354LSUK-T include a watchdog timer function?
No, the MAX6354LSUK-T does not include a watchdog timer. It belongs to the MAX6354 subgroup (5-pin SOT23, VCC2-referenced RST), which lacks WDI functionality. Watchdog capability is exclusive to the MAX6358/MAX6359/MAX6360 variants (6-pin SOT23, WDI pin present). The MAX6354LSUK-T provides only dual-voltage monitoring and manual reset.
What is the output type and drive capability of the RST pin on MAX6354LSUK-T?
The RST pin on MAX6354LSUK-T is an active-low push-pull output referenced to VCC2. It sinks up to 1.2mA while maintaining VOL ≤ 0.3V (at VCC2 ≥ 2.7V) and sources negligible current. This eliminates the need for an external pull-up resistor and ensures direct compatibility with VCC2-domain logic inputs without level shifting.
Can MAX6354LSUK-T operate with VCC1 and VCC2 supplied from different voltage sources?
Yes, MAX6354LSUK-T is explicitly designed for independent dual-supply monitoring: VCC1 and VCC2 may be derived from separate regulators (e.g., 5V and 3.3V rails), and the device remains functional as long as at least one supply exceeds 1.0V. The reset output is asserted if either supply falls below its respective threshold-enabling robust fault detection in distributed power architectures.
Is the MAX6354LSUK-T RoHS-compliant and what package variant does "-T" denote?
Yes, MAX6354LSUK-T is RoHS-compliant. The "-T" suffix indicates tape-and-reel packaging in the 5-pin SOT23 (U5-1) outline. Lead-free versions are designated with "+T" per Maxim's ordering convention. Both variants meet JEDEC standards and are qualified for industrial temperature operation (-40°C to +85°C).
MAX6354LSUK-T 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:
- 2.93V, 4.63V
- 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
MAX6354LSUK-T FAQ
1.How can I place an order for MAX6354LSUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6354LSUK-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 MAX6354LSUK-T reliable?
The price and inventory of MAX6354LSUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6354LSUK-T is usually 5 days.
3.What payment methods are accepted for MAX6354LSUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6354LSUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6354LSUK-T?
MAX6354LSUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6354LSUK-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 MAX6354LSUK-T?
For technical support, including MAX6354LSUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6354LSUK-T requirements.
6.How does Aetrix verify that MAX6354LSUK-T is sourced from the original manufacturer or authorized distributors?
All MAX6354LSUK-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 MAX6354LSUK-T meets industry standards.
7.What is the process for return or replacement of MAX6354LSUK-T?
All MAX6354LSUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6354LSUK-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 MAX6354LSUK-T part is unused and in its original packaging.
Return procedure for MAX6354LSUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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