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Analog Devices Inc./Maxim Integrated MAX6354TWUK+T
- Part No.:
- MAX6354TWUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6354TWUK+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,831
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Product details
Overview
MAX6354TWUK+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, factory-set VCC1 threshold of 3.08V and VCC2 threshold of 1.67V, 100ms minimum reset timeout, 20µA supply current, and operation over –40°C to +85°C - used in multivoltage embedded systems to ensure reliable power-on and brownout reset sequencing.
For engineers reviewing the MAX6354TWUK+T datasheet, MAX6354TWUK+T pinout, MAX6354TWUK+T application, or MAX6354TWUK+T equivalent, key selection criteria include dual-supply monitoring with independent thresholds, guaranteed RESET validity down to VCC2 = 1V, SOT23-5 package compatibility, and manual-reset debouncing without external components.
Technical Context
The MAX6354TWUK+T monitors two independent supply rails (VCC1 and VCC2), asserting its single active-low push-pull RST output when either falls below its precision threshold - 3.08V for VCC1 and 1.67V for VCC2. Its reset state remains valid as long as at least one supply exceeds +1.0V, enabling robust operation during asymmetric rail collapse.
This device implements a fixed 100ms minimum reset pulse width after threshold violation, features a debounced TTL/CMOS-compatible manual-reset input (MR), and draws only 20µA typical quiescent current. It lacks watchdog timer and third-voltage monitor functions, distinguishing it from MAX6358–MAX6360 and MAX6355–MAX6357 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.05V at +25°C; ensures precise detection of +3.3V rail undervoltage before system instability |
| VCC2 Threshold | 1.67V ±0.03V at +25°C; enables reliable monitoring of low-voltage logic rails such as +1.8V or +1.65V domains |
| Reset Timeout | 100ms min (up to 280ms); guarantees sufficient processor initialization time after power stabilization |
| Supply Current | 20µA typical; supports ultra-low-power battery-backed or always-on monitoring applications |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended-temperature embedded deployments |
| RESET Output Type | Active-low push-pull referenced to VCC2; eliminates need for external pull-up and drives directly into µP reset pin |
| MR Input | Debounced TTL/CMOS-compatible; accepts clean or noisy manual reset signals without external RC filtering |
Pinout & Package
MAX6354TWUK+T is housed in a lead(Pb)-free 5-pin SOT23 package (package code U5-1), 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; asserts low when VCC1 < 3.08V or VCC2 < 1.67V; sinks 1.2mA @ VCC2 ≥ 2.7V |
| 2 - GND | Ground reference | Common return path for internal comparators and output stage; must be low-impedance |
| 3 - MR | Manual-reset input | Active-low debounced input; forces RST low while asserted and holds reset for full timeout after release |
| 4 - VCC2 | Secondary supply input | Powers device and provides voltage reference for RST output; monitored at 1.67V threshold |
| 5 - VCC1 | Primary supply input | Monitored at 3.08V threshold; powers internal circuitry when above VCC2; not used as RST reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage thresholds | Factory-trimmed 3.08V (VCC1) and 1.67V (VCC2) enable accurate monitoring of mismatched supply rails without calibration |
| Push-pull RST referenced to VCC2 | Eliminates external pull-up resistor and ensures defined logic level even if VCC1 fails while VCC2 remains active |
| Guaranteed RESET validity to VCC2 = 1V | Ensures functional reset assertion during deep brownout conditions where VCC2 drops to 1.0V |
| 20µA supply current | Reduces standby power impact in battery-critical applications such as portable instrumentation and remote sensors |
| 100ms min reset pulse width | Meets or exceeds typical µP reset hold-time requirements across ARM, PIC, and MSP430 families |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Multirail control system with +3.3V I/O and +1.8V core logic, requiring coordinated reset on either rail failure. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low reset referenced to the lower-voltage rail (VCC2) to guarantee timing integrity during asymmetric power collapse. Use Value: Prevents partial initialization and latch-up by ensuring reset remains valid down to VCC2 = 1.0V, even if +3.3V rail collapses first. |
Use Scenario: Battery-powered ECG device using +3.3V analog front-end and +1.65V digital subsystem, needing fail-safe boot sequencing. IC Role / Device Role / Timing Role: Precision voltage monitor triggering 100ms reset pulse upon drop below 3.08V (VCC1) or 1.67V (VCC2), synchronized to MCU wake-up timing. Use Value: 20µA quiescent current extends battery life; push-pull output eliminates pull-up leakage path critical in low-power sleep modes. |
| Automotive Body Control Modules | Industrial IoT Edge Gateways |
Use Scenario: 12V-to-5V/3.3V/1.8V power tree in BCM with transient-prone environment requiring noise-immune reset generation. IC Role / Device Role / Timing Role: Supervisory IC rejecting short VCC transients (<100ns at 0.5V overdrive) while asserting reliable reset on sustained brownout. Use Value: Built-in glitch rejection and 20ppm/°C tempco ensure stable threshold performance across under-hood temperature swings. |
Use Scenario: Dual-core gateway with separate +3.3V communication SoC and +1.8V security co-processor, requiring independent but synchronized reset signaling. IC Role / Device Role / Timing Role: Single-chip dual-rail monitor replacing discrete comparator + timer solution, reducing BOM count and layout area. Use Value: SOT23-5 footprint saves board space; no external components required for basic dual-supply supervision functionality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6354TVUK+T | VCC1 threshold = 3.08V, VCC2 threshold = 1.58V (vs. 1.67V); otherwise identical pinout, package, and timing | Better suited for systems with tighter 1.6V rail tolerance or requiring earlier reset assertion on VCC2 sag | Select MAX6354TVUK+T when VCC2 nominal is ≤1.6V and margin to 1.58V threshold improves safety factor |
| TLV803EC26DBVR | Single-supply supervisor (2.63V threshold), SOT23-5, no VCC2 monitoring; 35µA ICC vs. 20µA; 200ms reset timeout | Lacks dual-rail capability - requires separate ICs or redesign to monitor both rails | Choose only if system uses single regulated rail or can accept increased component count and reduced integration |
Compared with MAX6354TVUK+T, the MAX6354TWUK+T offers higher VCC2 trip point (1.67V vs. 1.58V) for improved noise margin on 1.8V rails; versus TLV803EC26DBVR, it delivers true dual-supply supervision in one device, reducing design complexity and PCB area despite slightly higher cost.
Availability
MAX6354TWUK+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and industrial IoT edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6354TWUK+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, communications, computing, and consumer applications.
The MAX6351–MAX6360 family was engineered specifically for multivoltage embedded systems requiring coordinated reset assertion across disparate supply rails - emphasizing accuracy, low power, and guaranteed operation down to 1V supply.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6354TWUK+T?
The MAX6354TWUK+T has a factory-set VCC1 threshold of 3.08V (±0.05V at +25°C) and VCC2 threshold of 1.67V (±0.03V at +25°C), as confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet. These values are trimmed during production and guaranteed over –40°C to +85°C.
Does the MAX6354TWUK+T include a watchdog timer function?
No, the MAX6354TWUK+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6354TWUK+T is a dual-voltage supervisor only, with manual reset (MR) and dual-threshold monitoring - no WDI pin or timeout circuitry is present.
What package type and RoHS status does the MAX6354TWUK+T use?
The MAX6354TWUK+T uses a 5-pin SOT23 package (outline 21-0057, land pattern 90-0174) and is lead(Pb)-free, indicated by the "+T" suffix per Maxim's ordering convention. The "+" denotes RoHS-compliant packaging, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 requirements.
How is the reset output of the MAX6354TWUK+T referenced, and what are its drive capabilities?
The MAX6354TWUK+T features a single active-low push-pull RST output referenced to VCC2. It sinks up to 1.2mA when VCC2 ≥ 2.7V (VOL ≤ 0.3V), and up to 3.2mA when VCC2 ≥ 4.5V (VOL ≤ 0.4V). This eliminates the need for an external pull-up resistor and ensures deterministic logic levels during VCC2 brownout.
Can the MAX6354TWUK+T monitor three supply voltages?
No, the MAX6354TWUK+T monitors exactly two supply voltages: VCC1 and VCC2. Third-voltage monitoring via the RSTIN pin is available only on MAX6355/MAX6356/MAX6357 variants. The MAX6354TWUK+T has no RSTIN pin - its 5-pin SOT23 configuration includes only RST, GND, MR, VCC2, and VCC1.
MAX6354TWUK+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:
- 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+T FAQ
1.How can I place an order for MAX6354TWUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6354TWUK+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 MAX6354TWUK+T reliable?
The price and inventory of MAX6354TWUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6354TWUK+T is usually 5 days.
3.What payment methods are accepted for MAX6354TWUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6354TWUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6354TWUK+T?
MAX6354TWUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6354TWUK+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 MAX6354TWUK+T?
For technical support, including MAX6354TWUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6354TWUK+T requirements.
6.How does Aetrix verify that MAX6354TWUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6354TWUK+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 MAX6354TWUK+T meets industry standards.
7.What is the process for return or replacement of MAX6354TWUK+T?
All MAX6354TWUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6354TWUK+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 MAX6354TWUK+T part is unused and in its original packaging.
Return procedure for MAX6354TWUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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