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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:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,219
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Product details
Overview
MAX6353UWUK from Maxim Integrated is a dual-voltage microprocessor supervisory IC with precision reset threshold monitoring for VCC1 (2.78V) and VCC2 (1.67V), active-low push-pull RESET output referenced to VCC1, debounced manual reset input, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - used in multivoltage embedded systems requiring reliable power-on and brownout detection.
For engineers reviewing the MAX6353UWUK datasheet, MAX6353UWUK pinout, MAX6353UWUK application, or MAX6353UWUK equivalent, this page delivers verified electrical parameters, SOT23-5 package mapping, functional role in voltage supervision, and validated alternative options for dual-supply reset management.
Technical Context
The MAX6353UWUK monitors two independent supply rails (VCC1 and VCC2) using factory-trimmed comparators with ±1.5% threshold accuracy over –40°C to +85°C. Its RESET output asserts when either supply falls below its respective threshold and remains valid as long as at least one supply stays ≥1.0V.
It features a debounced TTL/CMOS-compatible MR input with internal 63.5kΩ pullup and <1µs glitch rejection, plus 100ms minimum power-on reset pulse width. Unlike MAX6358–MAX6360 variants, it does not include watchdog timer functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.78V ±1.5% - precise brownout detection for primary 2.8V rail |
| VCC2 Threshold | 1.67V ±1.5% - accurate monitoring of secondary 1.7V logic or I/O supply |
| Supply Current | 20µA typical - enables ultra-low-power operation in battery-backed systems |
| RESET Pulse Width | 100ms minimum - ensures sufficient duration for µP initialization |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded deployment |
| RESET Output Type | Active-low push-pull referenced to VCC1 - drives loads directly without external pullup |
| MR Input Logic | Debounced TTL/CMOS-compatible - eliminates false triggers from switch bounce or noise |
Pinout & Package
MAX6353UWUK is housed in a 5-pin SOT23-5 package with gull-wing leads, 1.27mm pitch, and JEDEC MO-178AC outline. The package supports reflow soldering and is available in both leaded and lead-free (suffix +T) versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC1; sinks 1.2mA at VCC1 ≥ 2.7V; asserts when VCC1 < 2.78V or VCC2 < 1.67V |
| 2 - GND | Ground reference | Common return path for all internal circuitry and reset output |
| 3 - MR | Manual reset input | Active-low; internally pulled up to VCC1 via 63.5kΩ; debounced with 100ns glitch rejection |
| 4 - VCC2 | Secondary supply input | Powers internal comparator for VCC2 monitoring; must be ≥1.2V for full functionality |
| 5 - VCC1 | Primary supply input | Powers device core and RST output stage; defines reset output voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous precision thresholds on VCC1 (2.78V) and VCC2 (1.67V) eliminate need for discrete supervisors |
| Guaranteed RESET validity to 1.0V | Ensures deterministic reset behavior even during deep brownout - critical for safe µP shutdown |
| No external components required | Factory-trimmed thresholds and integrated pullup eliminate resistors, capacitors, or trimming circuits |
| Power-supply transient immunity | Rejects transients ≤200ns at 0.5V overdrive - prevents spurious resets in noisy environments |
| Low quiescent current | 20µA max supply current extends battery life in portable equipment and always-on systems |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
|
Use Scenario: Dual-rail microcontroller system powered by 2.8V core and 1.7V I/O supplies operating in variable-temperature factory environments. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to halt processor execution upon undervoltage on either rail. Use Value: Prevents corrupted firmware execution or memory writes during unstable power conditions, meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Portable ultrasound device with battery-backed 2.8V analog front-end and 1.7V digital subsystem requiring fail-safe boot sequencing. IC Role / Device Role / Timing Role: Dual-threshold supervisor generating 100ms+ reset pulse to ensure complete µP initialization before sensor activation. Use Value: Eliminates need for separate reset ICs per rail, reducing BOM count and PCB area while maintaining FDA Class II safety margins. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: CAN-connected ECU with 2.8V MCU core and 1.7V transceiver supply exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Brownout detector maintaining valid RESET state down to 1.0V on either supply to survive deep voltage sags. Use Value: Meets AEC-Q100 Grade 2 temperature requirements and provides robustness against ISO 16750-2 transient profiles. |
Use Scenario: Revenue-grade meter with isolated 2.8V metrology ASIC and 1.7V communication module operating across wide ambient temperature range. IC Role / Device Role / Timing Role: Precision voltage supervisor ensuring deterministic reset during AC mains dropout or battery switchover events. Use Value: Factory-trimmed 2.78V/1.67V thresholds match exact rail tolerances, avoiding margin-based design over-engineering. |
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 | Suitable where secondary rail is nominally 1.6V instead of 1.7V | Select UVUK when system uses 1.6V I/O supply; UWUK matches 1.7V rails |
| TPS3808G18DBVR | Single-supply monitor (1.8V only); no VCC2 input; open-drain RESET; 350ms default timeout | Requires external resistor divider to monitor second rail; lacks dual-threshold integration | Use only if redesigning for single-rail supervision or adding discrete monitoring circuitry |
Compared with MAX6353UWUK, MAX6353UVUK offers tighter matching to 1.6V rails but identical architecture, while TPS3808G18DBVR requires external components to replicate dual-voltage functionality and lacks guaranteed 1.0V RESET validity.
Availability
MAX6353UWUK is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
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 high-performance analog and mixed-signal ICs for industrial, communications, and computing applications.
The MAX6351–MAX6360 family was developed specifically for multivoltage microprocessor systems needing compact, low-power, factory-calibrated supervision without external components.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6353UWUK?
The MAX6353UWUK has a factory-set VCC1 threshold of 2.78V (±1.5%) and VCC2 threshold of 1.67V (±1.5%), as defined by the "UW" suffix in the Voltage Threshold Levels table. These values are trimmed during production and guaranteed over –40°C to +85°C. The MAX6353UWUK uses these precise thresholds to assert RESET when either supply drops below its respective trip point.
Does the MAX6353UWUK include a watchdog timer function?
No, the MAX6353UWUK does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the family. The MAX6353UWUK provides only dual-voltage monitoring, manual reset input, and active-low push-pull RESET output referenced to VCC1.
What is the RESET output configuration of the MAX6353UWUK?
The MAX6353UWUK features an active-low push-pull RESET output (pin 1), referenced to VCC1. It can sink 1.2mA at VCC1 ≥ 2.7V and sources current when inactive. This eliminates the need for an external pullup resistor, unlike open-drain alternatives such as the MAX6352 series.
Can the MAX6353UWUK operate with supply voltages below 2.0V?
Yes - the MAX6353UWUK guarantees RESET validity as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, and operates with supply ranges from 1.2V to 5.5V. Its 2.78V/1.67V thresholds are designed to supervise modern low-voltage rails, and the device draws only 20µA typical current at 1.2V, enabling use in ultra-low-power systems.
Is the MAX6353UWUK pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6353UWUK uses the 5-pin SOT23-5 package and shares pinout compatibility with MAX6352/MAX6353/MAX6354 variants (RST, GND, MR, VCC2, VCC1). However, it is not pin-compatible with 6-pin variants (e.g., MAX6355–MAX6360) due to differing pin counts and added functions like WDI or RSTIN. Always verify pin mapping using the official Maxim pin description table.
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:
- Not Verified
- 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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