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Analog Devices Inc./Maxim Integrated MAX6354TWUK+
- Part No.:
- MAX6354TWUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6354TWUK+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,780
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Product details
Overview
MAX6354TWUK+ 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 3.08V (VCC1) and 1.67V (VCC2), 20µA supply current, and guaranteed RESET validity down to VCC2 = 1V. It monitors two independent power rails in multivoltage embedded systems to ensure reliable power-on reset and brownout detection.
For engineers reviewing the MAX6354TWUK+ datasheet, MAX6354TWUK+ pinout, MAX6354TWUK+ application, or MAX6354TWUK+ equivalent, key selection criteria include dual-supply threshold accuracy, VCC2-referenced reset assertion, manual-reset debouncing, temperature-stable 100ms min reset pulse width, and compatibility with 5-pin SOT23 PCB layouts.
Technical Context
The MAX6354TWUK+ implements dual independent voltage comparators with hysteresis, each monitoring one supply rail (VCC1 and VCC2) against fixed precision thresholds. Reset is asserted whenever either supply drops below its respective trip point, and remains valid as long as at least one supply exceeds +1.0V.
It features a debounced TTL/CMOS-compatible manual-reset input (MR), no watchdog timer (distinguishing it from MAX6358/59/60), and no third-voltage monitor (unlike MAX6355/56/57). Its push-pull RST output is referenced solely to VCC2, enabling direct interface with logic tied to that rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.05V at +25°C; ensures accurate +3.3V rail monitoring with 3.00V to 3.15V tolerance over -40°C to +85°C |
| VCC2 Threshold | 1.67V ±0.03V at +25°C; enables precise supervision of +1.8V or +1.65V logic supplies |
| Supply Current | 20µA typical; supports ultra-low-power battery-backed or energy-constrained systems |
| Reset Pulse Width | 100ms minimum; guarantees sufficient duration for microprocessor initialization sequences |
| RESET Validity Range | Valid down to VCC2 = 1.0V; maintains functional reset state during deep brownout conditions on monitored rail |
| Reset Output Type | Active-low push-pull referenced to VCC2; eliminates need for external pull-up and ensures rail-consistent logic levels |
| Operating Temp | -40°C to +85°C extended range; qualified for industrial and automotive-adjacent embedded applications |
Pinout & Package
MAX6354TWUK+ is housed in a 5-pin SOT23 package (U5-1 outline), surface-mount, RoHS-compliant, with 0.95mm pitch and 2.9mm × 1.6mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC2; drives low during fault or MR assertion; compatible with VCC2-tied logic without level-shifting |
| 2 - GND | Ground reference | Common return path for both supply inputs and internal comparators; must be low-impedance |
| 3 - MR | Debounced manual-reset input | Active-low; forces reset when pulled ≤0.8V (for L/M suffixes) or ≤0.3×VCC1 (Y suffix); internally debounced |
| 4 - VCC2 | Secondary supply input & monitor rail | Power source and monitored voltage; sets RST output reference; must be ≥1.2V for full operation |
| 5 - VCC1 | Primary supply input & monitor rail | Power source and monitored voltage; defines first threshold (3.08V); powers internal circuitry when > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual precision voltage monitoring | Independent 3.08V and 1.67V thresholds with <20ppm/°C tempco enable stable multi-rail supervision across temperature |
| VCC2-referenced push-pull RST | Eliminates external pull-up resistor and ensures clean, rail-matched reset signaling for peripherals powered by VCC2 |
| Guaranteed RESET down to VCC2 = 1V | Ensures fail-safe reset assertion even during severe brownout on the monitored VCC2 rail |
| 20µA ultra-low quiescent current | Minimizes standby power draw in always-on or battery-operated systems without compromising supervision integrity |
| 100ms min power-on reset pulse | Meets or exceeds typical microprocessor reset timing requirements for reliable boot initialization |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising dual-rail power domains (e.g., +3.3V I/O and +1.8V core) in programmable logic controllers exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting active-low reset to ARM Cortex-M7 MCU upon drop below 3.08V or 1.67V, with 100ms pulse ensuring full register initialization. Use Value: Prevents erratic firmware execution during line transients or cold-start voltage ramp-up by guaranteeing deterministic reset until both rails stabilize. | Use Scenario: Power sequencing and brownout protection in handheld ECG devices using lithium coin-cell backup and low-noise analog front-end. IC Role / Device Role / Timing Role: Monitoring main +3.3V system rail and +1.8V ADC/DAC supply; asserting VCC2-referenced RST to MSP430F6779 during battery sag below 1.67V. Use Value: Enables graceful shutdown and data retention before critical supply collapse, leveraging guaranteed RESET validity down to VCC2 = 1.0V. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Ensuring robust startup and fault recovery in BCMs with separate +5V sensor interface and +3.3V microcontroller rails. IC Role / Device Role / Timing Role: Supervising +3.08V (VCC1) and +1.67V (VCC2) rails; generating rail-consistent reset to Infineon AURIX TC275 via VCC2-referenced push-pull output. Use Value: Avoids metastability in mixed-voltage domains by eliminating level-shifters and reducing BOM count versus discrete solutions. | Use Scenario: Power-fail detection and secure reset in ANSI C12.22-compliant meters with isolated +3.3V communication and +1.8V metrology ASIC supplies. IC Role / Device Role / Timing Role: Dual-threshold supervision triggering immediate reset to Renesas RL78/I1C when either rail dips-critical for tamper-proof flash write abort. Use Value: Meets IEC 62056-21 reset timing requirements while maintaining sub-20µA quiescent current for >10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6354TWUT+ | 6-pin SOT23 package; identical electrical specs but adds unused pin 6 (NC) and different land pattern | Requires PCB redesign; suitable only when legacy 6-pin layout exists or future pin expansion is planned | Select MAX6354TWUK+ for space-constrained 5-pin designs; choose MAX6354TWUT+ only if board already uses 6-pin footprint |
| TPS3808G30DBVR | Single-supply supervisor (3.0V threshold only); no VCC2 monitoring or dual-threshold capability | Limited to single-rail systems; cannot replace dual-monitoring function without adding second IC | Use only in simplified applications where only one rail requires supervision; not a functional substitute for MAX6354TWUK+ |
Compared with MAX6354TWUK+, the MAX6354TWUT+ offers identical supervision functionality but demands larger PCB area and different assembly tooling, while the TPS3808G30DBVR lacks VCC2 monitoring entirely-making MAX6354TWUK+ the sole fit for true dual-rail brownout detection in compact industrial designs.
Availability
MAX6354TWUK+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6354TWUK+ 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 high-performance analog and mixed-signal semiconductor solutions for industrial, communications, and computing markets.
The MAX6351–MAX6360 product line delivers precision dual- and triple-voltage supervisors optimized for reliability-critical embedded systems where simultaneous multi-rail power integrity verification is mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6354TWUK+?
The MAX6354TWUK+ has a factory-set VCC1 threshold of 3.08V (±0.05V at +25°C, 3.00V to 3.15V over -40°C to +85°C) and a VCC2 threshold of 1.67V (±0.03V at +25°C, 1.62V to 1.71V over temperature). These values are confirmed in the Voltage-Threshold Levels table and Electrical Characteristics section of the official datasheet. The "TW" suffix explicitly denotes this 3.08V/1.67V combination.
Does the MAX6354TWUK+ include a watchdog timer function?
No, the MAX6354TWUK+ does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358, MAX6359, and MAX6360 variants within the family. The MAX6354TWUK+ is a dual-voltage supervisor with manual reset (MR) input and dual-threshold monitoring only-no WDI pin or timeout circuitry is present.
What is the output configuration of the reset pin on the MAX6354TWUK+?
The MAX6354TWUK+ features an active-low push-pull reset output (RST) referenced to VCC2. This means the output actively drives low during reset and high (to VCC2) otherwise-eliminating the need for an external pull-up resistor and ensuring rail-consistent logic levels for devices powered by VCC2.
Can the MAX6354TWUK+ operate with supply voltages below 1.8V on VCC2?
Yes-the MAX6354TWUK+ guarantees functional reset assertion down to VCC2 = 1.0V, and its specified operating range for VCC2 is +1.2V to +5.5V. The 1.67V threshold remains valid across this range, enabling use with modern low-voltage rails such as +1.65V or +1.8V, provided VCC2 stays within the absolute maximum rating of -0.3V to +6V.
Is the MAX6354TWUK+ pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6354TWUK+ uses a 5-pin SOT23 package and shares pinout compatibility with other 5-pin variants (MAX6352, MAX6353, MAX6354), but differs from 6-pin versions (e.g., MAX6351, MAX6355–MAX6360). Pin 1 is RST, pin 2 is GND, pin 3 is MR, pin 4 is VCC2, and pin 5 is VCC1-identical across all 5-pin family members regardless of suffix or threshold.
MAX6354TWUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, 3.08V
- 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
MAX6354TWUK+ FAQ
1.How can I place an order for MAX6354TWUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6354TWUK+ 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 MAX6354TWUK+ reliable?
The price and inventory of MAX6354TWUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6354TWUK+ is usually 5 days.
3.What payment methods are accepted for MAX6354TWUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6354TWUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6354TWUK+?
MAX6354TWUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6354TWUK+ 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 MAX6354TWUK+?
For technical support, including MAX6354TWUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6354TWUK+ requirements.
6.How does Aetrix verify that MAX6354TWUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6354TWUK+ 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 MAX6354TWUK+ meets industry standards.
7.What is the process for return or replacement of MAX6354TWUK+?
All MAX6354TWUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6354TWUK+, 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 MAX6354TWUK+ part is unused and in its original packaging.
Return procedure for MAX6354TWUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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