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Analog Devices Inc./Maxim Integrated MAX6353TZUK+T
- Part No.:
- MAX6353TZUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6353TZUK+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
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Product details
Overview
MAX6353TZUK+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC1, precision factory-set thresholds of 3.08V (VCC1) and 2.32V (VCC2), 20µA supply current, and operation over –40°C to +85°C. It monitors two independent power rails in multivoltage embedded systems to ensure reliable power-on reset and fault detection.
For engineers reviewing the MAX6353TZUK+T datasheet, MAX6353TZUK+T pinout, MAX6353TZUK+T application, or MAX6353TZUK+T equivalent, key selection criteria include dual-supply threshold accuracy, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, manual-reset debouncing, and compatibility with 5-pin SOT23 PCB layouts.
Technical Context
The MAX6353TZUK+T implements dual independent voltage comparators with hysteresis, each monitoring one supply rail against its factory-trimmed threshold. Its reset generator asserts an active-low push-pull output referenced solely to VCC1 when either VCC1 drops below 3.08V or VCC2 falls below 2.32V.
No watchdog timer or third-voltage monitor is present - this variant belongs to the base dual-supply group (MAX6353 series) without WDI or RSTIN functionality. It uses BiCMOS process technology and guarantees reset timeout of 100–280ms with full temperature coverage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V (–40°C to +85°C); ensures reliable reset assertion when primary 3.3V rail sags below specification |
| VCC2 Threshold | 2.32V ±0.07V (–40°C to +85°C); monitors secondary 2.5V or 2.3V domain with tight tolerance |
| Supply Current | 20µA typical at +25°C; enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Reset Timeout | 100–280ms; provides sufficient pulse width for microprocessor initialization across voltage and temperature |
| RESET Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; guarantees functional reset state even during deep brownout conditions |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Package | 5-pin SOT23; compact footprint compatible with high-density PCB layouts and automated assembly |
Pinout & Package
MAX6353TZUK+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5-1), with 0.95mm pitch, 2.9mm × 1.6mm body, and thermal pad omitted. Pin 1 is RST (active-low push-pull output referenced to VCC1), Pin 2 is GND, Pin 3 is MR (debounced manual-reset input), Pin 4 is VCC2, and Pin 5 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (RST) | Active-low reset output | Push-pull CMOS driver referenced to VCC1; sinks 1.2mA at ≤0.3V, no external pull-up required |
| Pin 2 (GND) | Ground reference | Common return path for both supply inputs and internal comparators; must be low-impedance |
| Pin 3 (MR) | Manual-reset input | Debounced TTL/CMOS-compatible input; pulling low forces reset for duration plus timeout period |
| Pin 4 (VCC2) | Secondary supply input | Monitors second rail (2.32V threshold); powers internal circuitry when VCC2 > VCC1 |
| Pin 5 (VCC1) | Primary supply input | Monitors main rail (3.08V threshold); powers device and defines RST logic high level |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously tracks 3.08V and 2.32V rails with separate comparators and hysteresis, eliminating need for discrete supervisor ICs |
| Guaranteed reset validity to 1V | Ensures RST remains asserted and logically valid even as either supply collapses to 1.0V, supporting robust brownout recovery |
| 20µA ultra-low quiescent current | Reduces standby power in always-on systems; enables >10-year battery life in coin-cell-powered applications |
| 100ms minimum POR pulse width | Meets or exceeds microprocessor reset timing requirements across voltage and temperature extremes |
| Debounced manual-reset input | Rejects <100ns glitches and eliminates need for external RC filtering on MR line |
Applications
| Industrial PLC Controller | Medical Point-of-Care Device |
|---|---|
Use Scenario: Dual-rail power system with 3.3V MCU core and 2.3V sensor interface ASIC. IC Role / Device Role / Timing Role: Supervises both rails and asserts synchronized reset to prevent firmware corruption during asymmetric brownout. Use Value: Prevents partial initialization by guaranteeing reset remains active until both supplies stabilize above 3.08V and 2.32V respectively. |
Use Scenario: Portable diagnostic instrument powered by Li-ion battery with regulated 3.3V and LDO-derived 2.3V supplies. IC Role / Device Role / Timing Role: Provides fail-safe power-on reset and undervoltage lockout for safety-critical boot sequence. Use Value: Enables reliable cold-start under low-battery conditions where VCC1 may dip to 1.2V while VCC2 stays >1.0V. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Microcontroller-based BCM with 3.3V logic and 2.3V CAN transceiver supply. IC Role / Device Role / Timing Role: Monitors both domains and triggers hardware reset if either rail fails during ignition cycling. Use Value: Eliminates need for separate reset ICs per rail, reducing BOM count and board space in constrained ECU designs. |
Use Scenario: Revenue-grade meter with isolated 3.3V MCU and 2.3V metrology ADC supply. IC Role / Device Role / Timing Role: Ensures deterministic reset behavior during AC mains dropout or backup capacitor discharge. Use Value: Maintains reset assertion down to VCC1 = 1.0V or VCC2 = 1.0V, enabling graceful shutdown before data loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353SZUK+T | VCC1 threshold = 2.93V, VCC2 threshold = 2.32V; otherwise identical pinout, timing, and features | Better suited for systems with nominal 2.8V or 2.9V primary rail instead of 3.08V | Select when primary supply nominal is closer to 2.9V than 3.08V; same PCB layout and firmware integration |
| TPS3808G33DBVR | Single-supply (3.3V only), no VCC2 monitoring; 3% threshold accuracy vs. MAX6353's 2.6% typical; 1.8µA IQ | Lacks dual-rail capability; requires separate supervision for secondary rail | Choose only if monitoring one rail suffices and ultra-low IQ (<2µA) is critical; not drop-in compatible |
Compared with MAX6353TZUK+T, MAX6353SZUK+T offers identical functionality with a lower VCC1 threshold for tighter 2.9V-system alignment, while TPS3808G33DBVR reduces quiescent current but sacrifices dual-supply monitoring - requiring additional components for multivoltage integrity.
Availability
MAX6353TZUK+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6353TZUK+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 multivoltage microprocessor systems requiring precise, low-power, dual-rail supervision with guaranteed operation down to 1V supply - targeting reliability-critical embedded platforms.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6353TZUK+T?
The MAX6353TZUK+T has a factory-trimmed VCC1 threshold of 3.08V (±0.08V over –40°C to +85°C) and VCC2 threshold of 2.32V (±0.07V over temperature). These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet. The "TZ" suffix directly encodes these thresholds, and the MAX6353TZUK+T does not support user-adjustable thresholds.
Does the MAX6353TZUK+T include a watchdog timer or third-voltage monitor?
No, the MAX6353TZUK+T does not include a watchdog timer or third-voltage monitor. It belongs to the base MAX6353 subgroup, which provides only dual-supply monitoring and a single active-low push-pull RST output referenced to VCC1. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants, and third-voltage monitoring is limited to MAX6355/MAX6356/MAX6357.
What is the recommended PCB footprint and land pattern for the MAX6353TZUK+T?
The MAX6353TZUK+T uses a standard 5-pin SOT23 package (outline 21-0057, land pattern 90-0174). Recommended footprint dimensions are 0.95mm pin pitch, 1.27mm pad length, 0.55mm pad width, and 2.9mm × 1.6mm body outline. Thermal pad is not present. This matches industry-standard SOT23-5 placements used for automated reflow assembly.
Can the MAX6353TZUK+T operate with VCC1 and VCC2 supplied from different voltage sources?
Yes, the MAX6353TZUK+T is explicitly designed for independent dual-supply operation: VCC1 and VCC2 may be derived from separate regulators or power domains. The device remains functional as long as at least one supply is ≥1.0V, and reset asserts if either drops below its respective threshold - enabling robust supervision in heterogeneous power architectures.
What is the maximum sink current capability of the RST output on the MAX6353TZUK+T?
The RST output of the MAX6353TZUK+T can sink up to 1.2mA while maintaining VOL ≤ 0.3V (at VCC1 or VCC2 ≥ 2.7V), and up to 3.2mA with VOL ≤ 0.4V (at VCC1 or VCC2 ≥ 4.5V). This push-pull drive eliminates external pull-up resistors and supports direct interfacing with most microcontroller reset inputs without signal conditioning.
MAX6353TZUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.32V, 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
MAX6353TZUK+T FAQ
1.How can I place an order for MAX6353TZUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6353TZUK+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 MAX6353TZUK+T reliable?
The price and inventory of MAX6353TZUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6353TZUK+T is usually 5 days.
3.What payment methods are accepted for MAX6353TZUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6353TZUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6353TZUK+T?
MAX6353TZUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6353TZUK+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 MAX6353TZUK+T?
For technical support, including MAX6353TZUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6353TZUK+T requirements.
6.How does Aetrix verify that MAX6353TZUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6353TZUK+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 MAX6353TZUK+T meets industry standards.
7.What is the process for return or replacement of MAX6353TZUK+T?
All MAX6353TZUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6353TZUK+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 MAX6353TZUK+T part is unused and in its original packaging.
Return procedure for MAX6353TZUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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