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Analog Devices Inc./Maxim Integrated MAX6354SYUK
- Part No.:
- MAX6354SYUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6354SYUK.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,923
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Product details
Overview
MAX6354SYUK 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 2.93V (VCC1) and 2.19V (VCC2), 20µA supply current, and operation over –40°C to +85°C. It monitors two independent power rails in multivoltage embedded systems and asserts reset if either supply drops below its threshold.
For engineers reviewing the MAX6354SYUK datasheet, MAX6354SYUK pinout, MAX6354SYUK application, or MAX6354SYUK equivalent, key selection criteria include dual-supply monitoring capability, VCC2-referenced reset output, guaranteed reset validity down to VCC2 = 1.0V, watchdog timer absence (distinguishing it from MAX6359/MAX6360), and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6354SYUK implements dual independent voltage comparators with hysteresis, each tied to a dedicated supply input (VCC1 and VCC2), with reset assertion triggered when either supply falls below its precise factory-trimmed threshold. Its reset generator guarantees a minimum 100ms pulse width and remains functional as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V across the full temperature range.
No watchdog timer or third-voltage monitor is integrated - this distinguishes MAX6354SYUK from MAX6359/MAX6360 (watchdog-enabled) and MAX6356/MAX6357 (triple-monitor). The device uses BiCMOS process technology and features debounced TTL/CMOS-compatible manual-reset input with 1µs minimum pulse width and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±1.5% (–40°C to +85°C); precisely monitors +3.0V or +2.93V rail without external components |
| VCC2 Threshold | 2.19V ±1.5% (–40°C to +85°C); enables reliable supervision of +2.2V or +2.19V auxiliary rail |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; supports ultra-low-power battery-backed systems |
| Reset Pulse Width | 100ms minimum; ensures sufficient duration for microprocessor initialization and state clearing |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Reset Output Type | Active-low push-pull referenced to VCC2; eliminates need for external pull-up and drives directly into µP reset pin |
| Reset Validity | Guaranteed while VCC2 ≥ 1.0V or VCC1 ≥ 1.0V; maintains reset integrity during brownout conditions |
Pinout & Package
MAX6354SYUK is housed in a 5-pin SOT23 package (U5-1 outline, 21-0057), with 1.6mm × 2.9mm footprint and 0.95mm height - compatible with standard high-density PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC2; sinks 1.2mA at VCC2 ≥ 2.7V (VOL ≤ 0.3V); no external pull-up required |
| 2 - GND | Ground reference | Common return path for both VCC1 and VCC2 supplies and internal comparators |
| 3 - MR | Manual-reset input | Debounced TTL/CMOS-compatible; low pulse ≥ 1µs forces reset; internally pulled up (~63.5kΩ) |
| 4 - VCC2 | Secondary supply input & monitor rail | Power source and monitored voltage; reset asserted if VCC2 < 2.19V; output RST referenced to this rail |
| 5 - VCC1 | Primary supply input & monitor rail | Power source and monitored voltage; reset asserted if VCC1 < 2.93V; enables reset validity down to 1.2V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of two non-identical rails (e.g., +3.0V and +2.2V) with no shared reference or calibration drift |
| VCC2-referenced push-pull reset | Eliminates external pull-up resistor and ensures clean, rail-aligned reset signaling for µPs powered by VCC2 |
| Ultra-low quiescent current | 20µA max enables >10-year battery life in always-on supervisory applications (e.g., RTC backup circuits) |
| Guaranteed reset validity to 1.0V | Ensures deterministic reset behavior during deep brownout - critical for fail-safe shutdown in industrial controllers |
| Power-supply transient immunity | Rejects transients < 100ns at 100mV overdrive, preventing false resets in noisy power environments |
Applications
| Industrial PLC I/O Modules | Medical Diagnostic Handhelds |
|---|---|
|
Use Scenario: Supervising dual-rail power system (3.3V core, 2.2V sensor interface) in programmable logic controller modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting active-low reset to ARM Cortex-M7 MCU when either rail sags below threshold during ESD event or load surge. Use Value: Prevents firmware corruption by guaranteeing ≥100ms reset pulse even during VCC2 drop to 1.2V - meeting IEC 61000-4-2 Level 4 immunity requirements. |
Use Scenario: Power sequencing and fault detection in portable ultrasound probe with battery-backed real-time clock and analog front-end. IC Role / Device Role / Timing Role: Monitoring 2.93V main supply and 2.19V analog bias rail; generating synchronized reset to ensure ADC and FPGA initialize before signal acquisition. Use Value: 20µA supply current extends single-charge battery life by >18 months; VCC2-referenced RST avoids level-shifting circuitry in compact probe housing. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Ensuring safe startup and brownout recovery in LIN gateway module operating from 5V regulated and 3.3V microcontroller rails. IC Role / Device Role / Timing Role: Detecting undervoltage on both rails and asserting reset to prevent CAN/LIN communication lockup during cold-crank conditions. Use Value: Guaranteed operation from –40°C to +85°C and reset validity down to VCC2 = 1.0V enables robust performance during engine compartment thermal cycling. |
Use Scenario: Supervising isolated 3.3V digital domain and 2.2V metrology ADC supply in revenue-grade electricity meter with tamper detection. IC Role / Device Role / Timing Role: Providing fail-safe reset to metering SoC when either rail dips due to conducted EMI or capacitor aging. Use Value: Factory-trimmed 2.93V/2.19V thresholds eliminate calibration overhead; SOT23-5 footprint saves board space in sealed meter enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353SYUK | Active-low push-pull reset referenced to VCC1 (not VCC2); same thresholds (2.93V/2.19V) and package | Requires reset signal referenced to primary rail; unsuitable when µP reset pin is powered by VCC2 | Select MAX6353SYUK only if the target microcontroller's reset pin shares VCC1 supply |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no dual-rail monitoring; 350nA IQ; SOT23-5 | Cannot supervise two independent rails simultaneously; lacks VCC2-referenced output | Use only for single-rail systems where ultra-low IQ outweighs dual-monitoring requirement |
Compared with MAX6354SYUK, MAX6353SYUK provides identical voltage thresholds but references reset to VCC1 - making it incompatible when the host µP reset pin is powered by VCC2. TPS3808G33DBVR offers lower IQ but cannot replace dual-supply supervision, limiting its use to simpler single-rail designs.
Availability
MAX6354SYUK is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical handheld diagnostics, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6354SYUK 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, computing, and communications applications, with emphasis on reliability, low power, and integration.
The MAX6351–MAX6360 family delivers dual- and triple-voltage supervision for multirail embedded systems, targeting applications where simultaneous monitoring of non-identical power domains is essential for system-level fault tolerance.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6354SYUK?
The MAX6354SYUK has factory-set thresholds of 2.93V for VCC1 and 2.19V for VCC2, with ±1.5% tolerance over –40°C to +85°C. These values are laser-trimmed during production and documented in the Voltage Threshold Levels table of the datasheet; no external adjustment is possible.
Does the MAX6354SYUK include a watchdog timer function?
No, the MAX6354SYUK does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. MAX6354SYUK provides only dual-voltage monitoring and manual reset - confirmed by its pinout (no WDI pin) and feature set in the datasheet.
What is the maximum supply voltage the MAX6354SYUK can tolerate on VCC1 and VCC2 pins?
The MAX6354SYUK supports VCC1 and VCC2 inputs from 1.2V to 5.5V over temperature, with absolute maximum rating of –0.3V to +6V. Operation above 5.5V risks permanent damage; sustained operation at 5.5V is fully characterized and guaranteed per Electrical Characteristics table.
Can the MAX6354SYUK reset output drive a microcontroller reset pin directly without a pull-up resistor?
Yes, the MAX6354SYUK features an active-low push-pull reset output referenced to VCC2, eliminating the need for an external pull-up resistor. It sinks 1.2mA at VCC2 ≥ 2.7V with VOL ≤ 0.3V, enabling direct connection to standard CMOS µP reset inputs - verified in the "RESET Output Voltage Low" specification.
Is the MAX6354SYUK available in lead-free packaging?
Yes, MAX6354SYUK is available in lead(Pb)-free packaging. To order the RoHS-compliant version, replace the "-T" suffix with "+T" per Maxim's ordering convention (e.g., MAX6354SYUK+T), as specified in the Ordering Information section of the datasheet.
MAX6354SYUK 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:
- 2.19V, 2.93V
- 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
MAX6354SYUK FAQ
1.How can I place an order for MAX6354SYUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6354SYUK 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 MAX6354SYUK reliable?
The price and inventory of MAX6354SYUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6354SYUK is usually 5 days.
3.What payment methods are accepted for MAX6354SYUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6354SYUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6354SYUK?
MAX6354SYUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6354SYUK 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 MAX6354SYUK?
For technical support, including MAX6354SYUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6354SYUK requirements.
6.How does Aetrix verify that MAX6354SYUK is sourced from the original manufacturer or authorized distributors?
All MAX6354SYUK 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 MAX6354SYUK meets industry standards.
7.What is the process for return or replacement of MAX6354SYUK?
All MAX6354SYUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX6354SYUK, 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 MAX6354SYUK part is unused and in its original packaging.
Return procedure for MAX6354SYUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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