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Analog Devices Inc./Maxim Integrated MAX6353SZUK+
- Part No.:
- MAX6353SZUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6353SZUK+.pdf
- Description:
- MAX6353 DUAL-VOLTAGE MICROPROCES
- Quantity:
- Payment:
- Shipping:
Inventory:7,127
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Product details
Overview
MAX6353SZUK+ from Maxim Integrated is a dual-voltage microprocessor supervisory IC with precision reset thresholds of 2.93V on VCC1 and 2.32V on VCC2, 20µA supply current, 100ms minimum reset pulse width, and active-low push-pull reset output referenced to VCC1 - used in multivoltage embedded systems to ensure reliable power-on and brownout reset sequencing.
For engineers reviewing the MAX6353SZUK+ datasheet, MAX6353SZUK+ pinout, MAX6353SZUK+ application, or MAX6353SZUK+ equivalent, this page delivers verified electrical parameters, SOT23-5 package mapping, watchdog-free supervision architecture, and direct alternative part comparisons for industrial power monitoring designs.
Technical Context
The MAX6353SZUK+ monitors two independent supply rails (VCC1 and VCC2) and asserts its single active-low push-pull RESET output when either falls below its factory-trimmed threshold - 2.93V for VCC1 and 2.32V for VCC2 - with guaranteed validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. It includes a debounced TTL/CMOS-compatible manual reset input (MR) and supports no external components in dual-rail configurations.
This variant lacks watchdog timer and third-voltage monitor functionality (excluded from MAX6358–MAX6360 and MAX6355–MAX6357 families), and does not support open-drain or VCC2-referenced reset outputs - distinguishing it from MAX6352, MAX6354, and MAX6355 series members.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V over -40°C to +85°C - ensures precise reset assertion during +3.3V rail brownout |
| VCC2 Threshold | 2.32V ±0.03V over -40°C to +85°C - enables accurate monitoring of +2.5V or +2.3V auxiliary supplies |
| Supply Current | 20µA typical at +5.5V - supports ultra-low-power battery-backed systems without compromising supervision integrity |
| Reset Pulse Width | 100ms minimum - meets µP reset timing requirements for reliable firmware initialization |
| RESET Output Type | Active-low push-pull referenced to VCC1 - drives logic directly without pull-up resistor, reducing BOM count |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded control and instrumentation environments |
| Reset Validity | Guaranteed while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - maintains reset state during deep undervoltage conditions |
Pinout & Package
MAX6353SZUK+ is housed in a 5-pin SOT23-5 package with 1.6mm × 2.9mm footprint, 0.95mm height, and gull-wing leads - compatible with standard reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC1; sinks 1.2mA at VCC1 ≥ 2.7V; valid as long as VCC1 ≥ 1.0V or VCC2 ≥ 1.0V |
| 2 - GND | Ground reference | Common return path for internal comparators and output stage; must be low-impedance |
| 3 - MR | Debounced manual reset input | Active-low; internally pulled up ~63.5kΩ; requires <0.8V for assertion; rejects <100ns glitches |
| 4 - VCC2 | Secondary supply input | Monitors second voltage rail; powers internal circuitry when VCC2 > VCC1; threshold = 2.32V |
| 5 - VCC1 | Primary supply input | Monitors primary voltage rail; powers internal circuitry when VCC1 > VCC2; threshold = 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage precision monitoring | Factory-trimmed 2.93V/2.32V thresholds with 20ppm/°C tempco - eliminates calibration overhead in multirail systems |
| No external components required | Integrated comparators, glitch filter, and push-pull driver - reduces PCB area and design validation effort for dual-supply reset |
| Low quiescent current | 20µA max supply current - extends battery life in portable equipment without sacrificing supervision reliability |
| Robust reset timing | 100ms min reset pulse width with 20µs VCC-to-reset delay - ensures µP reset meets JEDEC JESD84-B41 spec |
| Transient immunity | Immune to VCC transients ≤100µs at 0.5V overdrive - prevents false resets in noisy industrial power environments |
Applications
| Industrial PLC Power Sequencing | Medical Sensor Node Supervision |
|---|---|
Use Scenario: A programmable logic controller uses separate +3.3V I/O and +2.5V core rails; brownout on either must halt operation before data corruption occurs. IC Role / Device Role / Timing Role: MAX6353SZUK+ continuously monitors both rails and asserts active-low RST within 20µs of threshold breach, holding reset for ≥100ms. Use Value: Prevents firmware execution during unstable power by guaranteeing reset validity down to VCC1 = 1.0V or VCC2 = 1.0V. | Use Scenario: A battery-powered wearable sensor node integrates a low-power MCU and analog front-end powered from distinct regulated rails. IC Role / Device Role / Timing Role: MAX6353SZUK+ provides synchronized reset initiation across both domains using a single push-pull output referenced to the primary rail. Use Value: Eliminates need for discrete reset ICs or RC networks - reduces component count and improves startup repeatability. |
| Automotive Body Control Module | Industrial HMI Display Controller |
Use Scenario: A body control module derives +3.3V from main battery via DC/DC and +2.5V from LDO; voltage sags must trigger immediate safe shutdown. IC Role / Device Role / Timing Role: MAX6353SZUK+ detects sag on either rail and forces MCU reset via RST pin, while MR allows service-mode forced reset. Use Value: Guarantees deterministic reset behavior under load dump or cold-crank conditions due to 1.0V reset validity floor. | Use Scenario: An industrial human-machine interface uses +3.3V for display logic and +2.3V for touch controller; simultaneous reset ensures coordinated boot. IC Role / Device Role / Timing Role: MAX6353SZUK+ serves as centralized reset arbiter, asserting one RST signal that fans out to both subsystems. Use Value: Enables single-point reset control without level-shifting or timing skew between domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353LTUK+ | VCC1 threshold = 4.63V, VCC2 = 3.08V - higher thresholds for +5V/+3.3V systems | Suitable for legacy 5V logic systems requiring tighter margin against 4.75V dropout | Select when monitoring +5V and +3.3V rails instead of +3.3V and +2.5V |
| TLV803EC29DBVR | Single-supply supervisor (2.93V only); SOT23-3; no VCC2 monitoring or MR input | Limited to single-rail applications; lacks dual-threshold and manual reset capability | Choose only if system has one critical rail and space constraints prohibit 5-pin solution |
Compared with MAX6353LTUK+, MAX6353SZUK+ targets lower-voltage dual-rail systems (e.g., +3.3V/+2.5V) with tighter threshold spacing; versus TLV803EC29DBVR, it adds essential dual-monitoring, MR, and guaranteed reset validity below 1.2V - making it irreplaceable in multivoltage embedded control where coordinated reset integrity is mandatory.
Availability
MAX6353SZUK+ is available at Aetrix Electronics and suitable for industrial PLCs, medical sensor nodes, automotive body controllers, and industrial HMI displays requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6353SZUK+ 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 consumer applications - emphasizing precision, low power, and integration.
The MAX6351–MAX6360 family delivers dual/triple-voltage µP supervisors optimized for reliability-critical embedded systems where simultaneous multi-rail monitoring and deterministic reset behavior are non-negotiable.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6353SZUK+?
The MAX6353SZUK+ features factory-trimmed reset thresholds of 2.93V on VCC1 and 2.32V on VCC2, specified over the full -40°C to +85°C operating range with ±0.05V and ±0.03V tolerances respectively. These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official MAX6351–MAX6360 datasheet. The 'SZ' suffix explicitly denotes this threshold pair, and the MAX6353SZUK+ implements them without external adjustment.
Does the MAX6353SZUK+ include a watchdog timer function?
No, the MAX6353SZUK+ does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358, MAX6359, and MAX6360 variants per the Selector Guide and Pin Description table. The MAX6353SZUK+ belongs to the base supervisory group (MAX6351–MAX6357) and provides only dual-voltage monitoring, manual reset input, and a single active-low push-pull reset output - with no WDI pin or timeout circuitry present.
What package type and pin count does the MAX6353SZUK+ use?
The MAX6353SZUK+ uses a 5-pin SOT23-5 package, as confirmed in the Ordering Information table and Pin Configurations section. Pin 1 is RST (active-low push-pull), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, and Pin 5 is VCC1. This matches the MAX6352/MAX6353/MAX6354 grouping in the device matrix and excludes the 6-pin SOT23-6 variants used by watchdog or triple-monitor versions.
Can the MAX6353SZUK+ operate with supply voltages below 1.2V?
The MAX6353SZUK+ guarantees RESET output validity as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - confirmed in the Absolute Maximum Ratings and Detailed Description sections. However, functional operation (i.e., accurate threshold detection and reset assertion) requires VCC1 and VCC2 to be within 1.2V to 5.5V per Electrical Characteristics. Below 1.2V, the device may hold reset but cannot reliably monitor or respond to new threshold breaches.
Is the reset output of the MAX6353SZUK+ open-drain or push-pull?
The MAX6353SZUK+ features an active-low push-pull reset output (RST pin), referenced to VCC1 - explicitly stated in the General Description, Pin Description, and Functional Diagram sections. Unlike the MAX6352/MAX6355/MAX6358 open-drain variants, this configuration drives both high and low states actively, eliminating the need for an external pull-up resistor and enabling direct interfacing with CMOS inputs.
MAX6353SZUK+ 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:
- 2.32V, 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
MAX6353SZUK+ FAQ
1.How can I place an order for MAX6353SZUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6353SZUK+ 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 MAX6353SZUK+ reliable?
The price and inventory of MAX6353SZUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6353SZUK+ is usually 5 days.
3.What payment methods are accepted for MAX6353SZUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6353SZUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6353SZUK+?
MAX6353SZUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6353SZUK+ 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 MAX6353SZUK+?
For technical support, including MAX6353SZUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6353SZUK+ requirements.
6.How does Aetrix verify that MAX6353SZUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6353SZUK+ 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 MAX6353SZUK+ meets industry standards.
7.What is the process for return or replacement of MAX6353SZUK+?
All MAX6353SZUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6353SZUK+, 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 MAX6353SZUK+ part is unused and in its original packaging.
Return procedure for MAX6353SZUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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