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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:2,500
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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, 20µA supply current, and guaranteed RESET validity down to VCC1 or VCC2 ≥ 1.0V - used in multivoltage embedded systems requiring reliable power-on and brownout detection.
For engineers reviewing the MAX6354TWUK-T datasheet, MAX6354TWUK-T pinout, MAX6354TWUK-T application, or MAX6354TWUK-T equivalent, this page delivers verified electrical specs, SOT23-5 package mapping, reset timing behavior, watchdog-free supervision architecture, and direct alternatives for dual-supply monitoring in portable and industrial controllers.
Technical Context
The MAX6354TWUK-T monitors two independent supply rails (VCC1 and VCC2) and asserts its single active-low push-pull RST output when either falls below its precision factory-trimmed threshold - 3.08V for VCC1 and 1.67V for VCC2. It guarantees valid reset assertion as long as at least one supply remains ≥ 1.0V, enabling robust operation during asymmetric rail collapse.
This device lacks watchdog timer and third-voltage monitor inputs - distinguishing it from MAX6358–MAX6360 and MAX6355–MAX6357 variants. Its manual-reset input (MR) is debounced and TTL/CMOS-compatible, with reset timeout period fixed at 100ms minimum after power-up or MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.05V at +25°C; ensures precise +3.3V rail supervision with 3.00V to 3.15V range over -40°C to +85°C |
| VCC2 Threshold | 1.67V ±0.03V at +25°C; enables accurate monitoring of +1.8V or +1.65V logic supplies |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; supports ultra-low-power battery-backed systems |
| Reset Pulse Width | 100ms minimum; meets μP reset hold-time requirements without external timing components |
| RESET Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; maintains deterministic reset state during deep brownout conditions |
| Operating Temp | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Package | 5-pin SOT23; footprint-compatible with industry-standard low-profile PCB layouts |
Pinout & Package
MAX6354TWUK-T is housed in a 5-pin SOT23 package (package code U5-1), with 1.6mm × 2.9mm body size, 0.95mm height, and gull-wing leads. Pin 1 is RST (active-low push-pull, referenced to VCC2), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC2, and Pin 5 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC2; drives low to reset μP when either VCC1 or VCC2 drops below threshold |
| 2 - GND | Ground reference | Common return path for internal comparators and output stage; must be low-impedance |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internally pulled up (~63.5kΩ); glitch rejection >100ns |
| 4 - VCC2 | Secondary supply input & voltage monitor | Monitors VCC2 rail (threshold = 1.67V); powers internal circuitry when VCC2 > VCC1 |
| 5 - VCC1 | Primary supply input & voltage monitor | Monitors VCC1 rail (threshold = 3.08V); powers internal circuitry when VCC1 > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail precision monitoring | Independent 3.08V (VCC1) and 1.67V (VCC2) thresholds with <20ppm/°C tempco ensure stable trip points across temperature |
| No external components required | Integrated comparators, reference, and push-pull driver eliminate need for pull-ups, RC networks, or discrete supervisors in dual-supply systems |
| Low-power operation | 20µA quiescent current enables use in always-on subsystems and battery-powered instrumentation |
| Brownout resilience | RESET remains valid down to VCC1 = 1.0V or VCC2 = 1.0V - critical for graceful shutdown in asymmetric rail failure scenarios |
| Transient immunity | Immune to VCC transients ≤200µs at 100mV overdrive - prevents false resets during switching noise or load dumps |
Applications
| Industrial PLC I/O Modules | Portable Medical Sensors |
|---|---|
|
Use Scenario: Dual-rail microcontroller (e.g., +3.3V core, +1.8V I/O) in DIN-rail mounted I/O module subject to 24V field bus transients and thermal cycling. IC Role / Device Role / Timing Role: Supervises both VCC rails and asserts active-low RST to hold MCU in reset until both supplies stabilize post-power-up or brownout recovery. Use Value: Prevents firmware corruption during partial rail collapse by guaranteeing reset assertion while either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - no external supervision logic needed. |
Use Scenario: Battery-powered ECG sensor with separate analog front-end (+3.3V) and digital processing (+1.8V) rails operating in cold ambient environments. IC Role / Device Role / Timing Role: Monitors both rails simultaneously; triggers reset if either drops below factory-set threshold during battery depletion or cold-start conditions. Use Value: Eliminates need for discrete voltage detectors and OR-gate logic, reducing BOM count and PCB area while maintaining 100ms minimum reset pulse width. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: Revenue-grade meter with isolated +3.3V communication interface and +1.8V metrology SoC, exposed to wide temperature swings and grid sags. IC Role / Device Role / Timing Role: Provides rail-failure detection and reset generation referenced to VCC2, ensuring clean boot sequence even when VCC1 collapses first. Use Value: Factory-trimmed 3.08V/1.67V thresholds match common LDO outputs; eliminates calibration effort and improves production yield. |
Use Scenario: Low-power BCM sub-module powered by vehicle battery (VCC2) and regulated +3.3V domain (VCC1), requiring fail-safe reset during ignition cycling. IC Role / Device Role / Timing Role: Detects undervoltage on either rail and holds MCU in reset until both are within spec - critical for CAN node initialization integrity. Use Value: 20µA supply current extends sleep-mode battery life; SOT23-5 package fits tight space constraints near microcontroller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353TWUK-T | Same package and thresholds, but RST output referenced to VCC1 instead of VCC2 | Required when reset signal must track primary supply (VCC1) rather than secondary (VCC2) | Select MAX6353TWUK-T only if system reset logic is tied to VCC1 domain and requires VCC1-referenced drive strength |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no VCC2 monitoring or dual-rail capability | Suitable only for single-rail systems; lacks dual-threshold functionality and VCC2 validity guarantee | Use TPS3808G33DBVR only when monitoring one rail and board space allows adding second supervisor for VCC2 |
Compared with MAX6354TWUK-T, MAX6353TWUK-T provides identical dual-threshold supervision but references RST to VCC1 - making it unsuitable where reset load is referenced to VCC2. TPS3808G33DBVR offers lower cost and higher accuracy for single-rail use but cannot replace MAX6354TWUK-T in true dual-supply monitoring without architectural redesign.
Availability
MAX6354TWUK-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical sensors, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
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 high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The MAX6351–MAX6360 family delivers integrated dual- and triple-voltage supervision for microprocessor-based systems where reliability, low power, and small footprint are essential - targeting multivoltage embedded control and instrumentation.
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 (range 3.00V to 3.15V over -40°C to +85°C) and VCC2 threshold of 1.67V (range 1.62V to 1.71V over temperature). These values are laser-trimmed and specified in the Voltage Threshold Levels table of the MAX6351–MAX6360 datasheet - the "TW" suffix directly encodes these thresholds.
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. The MAX6354TWUK-T is a dedicated dual-voltage supervisor with manual reset and precision threshold monitoring only - confirmed by its pinout (no WDI pin) and absence of watchdog timing specs in its electrical characteristics.
What is the output type and voltage reference of the RST pin on the MAX6354TWUK-T?
The RST pin on the MAX6354TWUK-T is an active-low push-pull output referenced to VCC2. It drives low (≤0.3V at 50µA sink) when asserted and high (≥0.8 × VCC2 at 350µA source) when deasserted - matching the "push-pull with respect to VCC2" specification for MAX6354/MAX6357/MAX6360 in the Pin Description section.
Can the MAX6354TWUK-T operate with supply voltages below 1.8V on either rail?
Yes - the MAX6354TWUK-T guarantees valid reset operation as long as either VCC1 or VCC2 remains ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. Its VCC2 threshold is 1.67V, making it compatible with +1.8V and +1.65V rails; operation down to 1.2V is supported across the full -40°C to +85°C range.
Is the MAX6354TWUK-T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6354TWUK-T uses the 5-pin SOT23 package and shares pinout with MAX6352/MAX6353/MAX6354 variants: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1. However, it is not pin-compatible with 6-pin variants (e.g., MAX6351, MAX6355) due to missing RSTIN/WDI pins - confirmed by Pin Configurations diagrams on page 9 of the datasheet.
MAX6354TWUK-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:
- 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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