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Analog Devices Inc./Maxim Integrated MAX6353UWUK+
- Part No.:
- MAX6353UWUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6353UWUK+.pdf
- Description:
- MAX6353 DUAL-VOLTAGE MICROPROCES
- Quantity:
- Payment:
- Shipping:
Inventory:4,015
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Product details
Overview
MAX6353UWUK+ from Maxim Integrated is a dual-voltage microprocessor supervisory IC with precision reset thresholds of 2.78V on VCC1 and 1.67V on VCC2, active-low push-pull reset output referenced to VCC1, 20µA supply current, and guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V - used in multivoltage embedded systems to ensure reliable power-on and brownout reset sequencing.
For engineers reviewing the MAX6353UWUK+ datasheet, MAX6353UWUK+ pinout, MAX6353UWUK+ application, or MAX6353UWUK+ equivalent, this page delivers verified electrical parameters, SOT23-5 package mapping, watchdog-free supervisory behavior, reset timing compliance, and real-world use context for industrial controllers and battery-powered instrumentation.
Technical Context
The MAX6353UWUK+ monitors two independent supply rails (VCC1 and VCC2) and asserts its single active-low push-pull RST output when either falls below its factory-trimmed threshold (2.78V/1.67V). It guarantees valid reset assertion as long as at least one supply remains ≥1.0V, enabling robust operation during asymmetric brownouts.
No watchdog timer or third-voltage monitor is present - confirmed by part number suffix "UW" (not "UT", "UK-T" with WDI), absence of WDI pin in SOT23-5 configuration, and exclusion from MAX6358/MAX6359/MAX6360 and MAX6355/MAX6356/MAX6357 families. Manual reset (MR) is debounced and TTL/CMOS-compatible.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.78V ±0.08V (factory-trimmed; ensures precise 2.78V brownout detection on primary rail) |
| VCC2 Threshold | 1.67V ±0.05V (factory-trimmed; enables accurate monitoring of low-voltage auxiliary rail) |
| Supply Current | 20µA typical (ultra-low quiescent draw supports always-on battery-backed systems) |
| Reset Pulse Width | 100ms minimum (guarantees sufficient duration for µP initialization across temperature) |
| RESET Validity | Down to VCC1 = 1.0V or VCC2 = 1.0V (ensures fail-safe reset assertion during deep undervoltage) |
| Reset Output Type | Active-low push-pull referenced to VCC1 (drives directly into µP reset pin without external pull-up) |
| Operating Temp | -40°C to +85°C (fully specified for industrial-grade embedded deployment) |
Pinout & Package
MAX6353UWUK+ is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), footprint-compatible with industry-standard 5-lead SOT-23 layouts and suitable for high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; sinks ≥1.2mA at VCC1 ≥2.7V; no external pull-up required |
| 2 - GND | Ground reference | Common return path for both monitored supplies and internal circuitry |
| 3 - MR | Debounced manual reset input | TTL/CMOS-compatible; low pulse ≥1µs forces reset; internally pulled up ~63.5kΩ |
| 4 - VCC2 | Secondary supply input | Monitors 1.67V rail; powers internal circuitry when VCC2 > VCC1; must not exceed VCC1 + 0.3V |
| 5 - VCC1 | Primary supply input | Monitors 2.78V rail; powers internal circuitry when VCC1 > VCC2; defines RST output voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage precision monitoring | Simultaneously tracks 2.78V and 1.67V rails with ±0.08V/±0.05V accuracy over -40°C to +85°C |
| Guaranteed reset validity to 1.0V | Ensures deterministic reset assertion even during severe brownout where VCC1 or VCC2 drops to 1.0V |
| No external components required | Eliminates need for external resistors, capacitors, or pull-ups in dual-rail supervision applications |
| Power-supply transient immunity | Rejects short negative-going transients ≤200ns (at 0.5V overdrive), preventing false resets |
| SOT23-5 compact packaging | Enables space-constrained designs with 2.9mm × 1.6mm footprint and 1.1mm max height |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered by separate 2.78V logic and 1.67V sensor interface rails. IC Role / Device Role / Timing Role: Dual-threshold supervisor ensuring synchronized reset if either rail collapses during field operation. Use Value: Prevents partial initialization and firmware corruption by asserting reset within 20µs of threshold breach. | Use Scenario: Handheld glucose meters using 2.78V MCU core and 1.67V analog front-end. IC Role / Device Role / Timing Role: Fail-safe reset generator maintaining valid RST signal down to 1.0V on either rail during battery discharge. Use Value: Guarantees clean shutdown before data loss occurs, meeting IEC 62304 safety requirements. |
| Battery-Powered IoT Sensors | Automotive Body Control Modules |
Use Scenario: LPWAN node with 2.78V RF SoC and 1.67V environmental sensor subsystem. IC Role / Device Role / Timing Role: Low-quiescent (20µA) dual-rail monitor enabling multi-year coin-cell operation. Use Value: Extends battery life while ensuring reliable wake-from-reset behavior after cold cranking events. | Use Scenario: BCM subassembly with 2.78V microcontroller and 1.67V CAN transceiver supply. IC Role / Device Role / Timing Role: Reset coordinator validating both domains before enabling CAN communication. Use Value: Eliminates bus arbitration errors caused by asynchronous power-up of controller and transceiver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353UVUK+ | VCC2 threshold = 1.58V (vs. 1.67V); same package, pinout, and timing | Preferred where tighter 1.58V brownout margin is required for 1.6V LDO outputs | Select UVUK+ when system uses 1.6V nominal rail with <100mV tolerance |
| TPS3808G18DBVR | Single-supply (1.8V threshold only); requires external resistor divider for second rail; 1.8µA IQ | Lacks native dual-threshold capability; needs additional components for VCC2 monitoring | Choose only if redesign allows adding external sensing network and ultra-low IQ is critical |
Compared with MAX6353UWUK+, MAX6353UVUK+ offers a lower VCC2 trip point for tighter 1.6V rail control, while TPS3808G18DBVR reduces quiescent current but sacrifices integrated dual-rail functionality - requiring layout changes and added BOM cost.
Availability
MAX6353UWUK+ is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and battery-powered IoT sensors requiring stable component supply, long-lifecycle support, and guaranteed -40°C to +85°C operation.
Supply support for MAX6353UWUK+ 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, automotive, and communications applications.
The MAX6351–MAX6360 family delivers dual/triple-voltage µP supervisors optimized for reliability-critical embedded systems where simultaneous multi-rail monitoring and fail-safe reset generation are mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6353UWUK+?
The MAX6353UWUK+ has a factory-trimmed VCC1 threshold of 2.78V (±0.08V) and VCC2 threshold of 1.67V (±0.05V), as defined by the "UW" suffix in the Voltage Threshold Levels table. These values are fully guaranteed over the -40°C to +85°C operating range and enable precise supervision of common 2.8V and 1.7V supply rails.
Does the MAX6353UWUK+ include a watchdog timer function?
No, the MAX6353UWUK+ does not include a watchdog timer. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants (suffix "UT" or "UK-T" with WDI pin), while MAX6353UWUK+ is a dedicated dual-voltage supervisor with only MR input and RST output. Its pinout lacks WDI, confirming absence of watchdog circuitry.
What is the reset output type and drive capability of the MAX6353UWUK+?
The MAX6353UWUK+ features an active-low push-pull reset output (RST pin) referenced to VCC1. It sinks ≥1.2mA when VCC1 ≥2.7V and VCC2 ≥1.0V, and maintains valid logic-low state down to VCC1 = 1.0V - eliminating need for external pull-up resistors in most µP interface configurations.
Can the MAX6353UWUK+ monitor a third voltage rail?
No, the MAX6353UWUK+ cannot monitor a third voltage. Third-rail monitoring (via RSTIN pin) is only available on MAX6355/MAX6356/MAX6357 variants (suffix "UT" in 6-pin SOT23-6). The MAX6353UWUK+ is a 5-pin device with fixed dual-rail architecture and no RSTIN terminal.
What package type and pin count does the MAX6353UWUK+ use?
The MAX6353UWUK+ uses a 5-pin SOT23-5 package (JEDEC MO-178AA), with pin 1 = RST, pin 2 = GND, pin 3 = MR, pin 4 = VCC2, and pin 5 = VCC1. This compact 2.9mm × 1.6mm footprint is compatible with standard SOT-23 pick-and-place equipment and high-density PCB layouts.
MAX6353UWUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, 2.78V
- 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
MAX6353UWUK+ FAQ
1.How can I place an order for MAX6353UWUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6353UWUK+ 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 MAX6353UWUK+ reliable?
The price and inventory of MAX6353UWUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6353UWUK+ is usually 5 days.
3.What payment methods are accepted for MAX6353UWUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6353UWUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6353UWUK+?
MAX6353UWUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6353UWUK+ 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 MAX6353UWUK+?
For technical support, including MAX6353UWUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6353UWUK+ requirements.
6.How does Aetrix verify that MAX6353UWUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6353UWUK+ 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 MAX6353UWUK+ meets industry standards.
7.What is the process for return or replacement of MAX6353UWUK+?
All MAX6353UWUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6353UWUK+, 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 MAX6353UWUK+ part is unused and in its original packaging.
Return procedure for MAX6353UWUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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