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Analog Devices Inc./Maxim Integrated MAX6354SWUK-T
- Part No.:
- MAX6354SWUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6354SWUK-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6354SWUK-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 2.93V and VCC2 threshold of 1.67V, 100ms minimum reset timeout, 20µA supply current, and operation over –40°C to +85°C - used to ensure reliable power-on reset and supply monitoring in multivoltage embedded systems.
For engineers reviewing the MAX6354SWUK-T datasheet, MAX6354SWUK-T pinout, MAX6354SWUK-T application, or MAX6354SWUK-T equivalent, key selection considerations include its VCC2-referenced RST output, dual-supply undervoltage detection with ±0.05V threshold accuracy over temperature, manual reset debouncing, and compatibility with 1.2V–5.5V supply rails.
Technical Context
The MAX6354SWUK-T monitors two independent supply rails (VCC1 and VCC2), asserting reset when either drops below its precision factory-trimmed threshold (2.93V for VCC1, 1.67V for VCC2). Its reset output is push-pull and referenced to VCC2, ensuring valid logic levels even as VCC2 decays down to 1.0V.
It features a debounced TTL/CMOS-compatible manual-reset input (MR) and guarantees RESET validity as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. No watchdog timer or third-voltage monitor is included - confirmed by part number suffix "SW" and device family mapping (MAX6354 lacks WDI and RSTIN pins).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; guaranteed 2.85V–3.00V over –40°C to +85°C - sets precise brownout point for primary supply |
| VCC2 Threshold | 1.67V ±0.03V at +25°C; guaranteed 1.62V–1.71V over –40°C to +85°C - enables robust low-voltage rail supervision |
| Reset Timeout | 100–280ms - ensures sufficient hold time for CPU initialization after power stabilization |
| Supply Current | 20µA typical (VCC1=5.5V, VCC2=3.6V) - supports ultra-low-power battery-backed systems |
| 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 external pull-up and drives directly into CMOS inputs |
| MR Input | Debounced TTL/CMOS-compatible; min pulse width 1µs - tolerates noisy board-level reset switches |
Pinout & Package
MAX6354SWUK-T is housed in a 5-pin SOT23 package (U5-1 outline, 21-0057), 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; sinks 1.2mA @ VCC2 ≥ 2.7V (VOL ≤ 0.3V); valid down to VCC2 = 1.0V |
| 2 - GND | Ground reference | Common return for all internal circuitry and reset output; must be low-impedance |
| 3 - MR | Manual reset input | Active-low, debounced; forces RST low while asserted and for full timeout period after release |
| 4 - VCC2 | Secondary supply input & monitor rail | Powers device when VCC2 > VCC1; monitored at 1.67V threshold; output referenced to this rail |
| 5 - VCC1 | Primary supply input & monitor rail | Powers device when VCC1 > VCC2; monitored at 2.93V threshold; no output referenced to this rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage monitoring | Independent, precision thresholds on VCC1 (2.93V) and VCC2 (1.67V) eliminate need for discrete comparators or resistor dividers |
| VCC2-referenced push-pull RST | Drives reset signal directly without external pull-up; maintains valid logic levels down to VCC2 = 1.0V |
| Guaranteed reset validity | RST remains asserted and electrically valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for graceful power-down sequencing |
| Low quiescent current | 20µA typical supply current enables use in always-on, battery-powered subsystems without significant drain |
| Industrial temperature range | –40°C to +85°C operation with fully specified parameters - suitable for automotive body electronics and industrial controllers |
Applications
| Computers | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Monitoring core and I/O supply rails in compact x86 or ARM-based single-board computers during cold start and brownout events. IC Role / Device Role / Timing Role: Dual-voltage supervisor generating synchronized reset pulse to CPU and peripheral logic upon VCC1 or VCC2 undervoltage. Use Value: Prevents erratic boot behavior by enforcing 100ms minimum reset assertion, matching typical CPU POR requirements. | Use Scenario: Supervising main Li-ion battery rail (VCC1 = 3.3V) and low-power backup rail (VCC2 = 1.8V) in medical wearables. IC Role / Device Role / Timing Role: Asserting active-low reset to MCU when either rail falls below threshold - especially critical for VCC2 decay during battery depletion. Use Value: 20µA supply current extends battery life; VCC2-referenced RST ensures clean reset even as backup rail sags to 1.0V. |
| Controllers | Multivoltage Systems |
Use Scenario: Power sequencing and fault detection in PLC I/O modules with mixed 5V, 3.3V, and 1.8V domains. IC Role / Device Role / Timing Role: Providing fail-safe reset initiation triggered independently by any monitored supply failure - no software dependency. Use Value: Precision thresholds (±0.05V) prevent nuisance resets during transient load steps; -40°C to +85°C rating ensures field reliability. | Use Scenario: Ensuring deterministic startup in FPGA-based systems with separate core (VCCINT), I/O (VCCIO), and auxiliary (VCCAUX) supplies. IC Role / Device Role / Timing Role: Monitoring two critical rails (e.g., VCCIO = 2.93V, VCCAUX = 1.67V) and asserting unified reset to FPGA configuration logic. Use Value: Eliminates need for external level-shifting or multiple supervisors - reduces BOM count and PCB area in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6354SUW-T | VCC1 threshold = 2.78V (vs. 2.93V); VCC2 threshold = 1.67V identical; same pinout, package, and timing | Suitable where primary rail is 2.8V instead of 3.0V - e.g., newer low-VDD SoCs | Select MAX6354SUW-T only if system VCC1 nominal is 2.8V; otherwise MAX6354SWUK-T matches 3.0V/1.8V or 3.3V/1.8V systems. |
| TPS3808G33DBVR | Single-supply (3.3V only), no VCC2 monitoring; fixed 3.08V threshold; 350ms reset timeout; SOT23-5 package | Lacks dual-rail capability - requires separate supervisor for second rail or external divider | Use only when monitoring one rail; MAX6354SWUK-T is required for true independent dual-voltage supervision without design compromise. |
Compared with MAX6354SUW-T and TPS3808G33DBVR, the MAX6354SWUK-T uniquely delivers matched 2.93V/1.67V thresholds in a single 5-pin SOT23, enabling compact, accurate supervision of asymmetric supply pairs without external components or timing trade-offs.
Availability
MAX6354SWUK-T is available at Aetrix Electronics and suitable for computers, portable/battery-powered equipment, and multivoltage systems requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6354SWUK-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6351–MAX6360 family was designed specifically for reliable, low-power dual- and triple-voltage microprocessor supervision in space-constrained embedded systems - emphasizing precision thresholds, wide supply range, and guaranteed operation down to 1.0V.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6354SWUK-T?
The MAX6354SWUK-T has a factory-set VCC1 threshold of 2.93V (guaranteed 2.85V–3.00V over –40°C to +85°C) and a VCC2 threshold of 1.67V (guaranteed 1.62V–1.71V over temperature). These values are defined by the "SW" suffix per Maxim's Voltage Threshold Levels table and are laser-trimmed during production.
Does the MAX6354SWUK-T include a watchdog timer or third-voltage monitor?
No. The MAX6354SWUK-T is a dual-voltage supervisor only. It does not include a watchdog timer (WDI pin) or adjustable third-voltage monitor (RSTIN pin) - confirmed by its 5-pin SOT23 package and MAX6354 device designation in the Selector Guide, which excludes WDI and RSTIN functionality.
What is the function and voltage reference of the RST output on the MAX6354SWUK-T?
The RST output of the MAX6354SWUK-T is an active-low, push-pull signal referenced to VCC2. It drives low to ≤0.3V (at ISINK = 50µA) and remains valid as long as VCC2 ≥ 1.0V - enabling direct interfacing with VCC2-domain logic without external pull-ups or level shifters.
Can the MAX6354SWUK-T operate with supply voltages below 2.0V?
Yes. The MAX6354SWUK-T operates with VCC1 and VCC2 as low as 1.2V over temperature (1.0V minimum for RESET validity). Its 1.67V VCC2 threshold and 2.93V VCC1 threshold allow supervision of modern low-voltage rails such as 1.8V I/O and 3.0V core supplies, with full specification down to –40°C.
Is the MAX6354SWUK-T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6354SWUK-T shares the same 5-pin SOT23 pinout (U5-1) with MAX6352, MAX6353, and MAX6354 variants, but differs functionally: MAX6352 has open-drain RST, MAX6353 has VCC1-referenced RST, while MAX6354SWUK-T provides VCC2-referenced push-pull RST - requiring schematic review before substitution.
MAX6354SWUK-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, 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
MAX6354SWUK-T FAQ
1.How can I place an order for MAX6354SWUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6354SWUK-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 MAX6354SWUK-T reliable?
The price and inventory of MAX6354SWUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6354SWUK-T is usually 5 days.
3.What payment methods are accepted for MAX6354SWUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6354SWUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6354SWUK-T?
MAX6354SWUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6354SWUK-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 MAX6354SWUK-T?
For technical support, including MAX6354SWUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6354SWUK-T requirements.
6.How does Aetrix verify that MAX6354SWUK-T is sourced from the original manufacturer or authorized distributors?
All MAX6354SWUK-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 MAX6354SWUK-T meets industry standards.
7.What is the process for return or replacement of MAX6354SWUK-T?
All MAX6354SWUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6354SWUK-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 MAX6354SWUK-T part is unused and in its original packaging.
Return procedure for MAX6354SWUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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