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Analog Devices Inc./Maxim Integrated MAX6353TZUK+
- Part No.:
- MAX6353TZUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6353TZUK+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,256
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Product details
Overview
MAX6353TZUK+ 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 guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V - used in multivoltage embedded systems requiring reliable power-on and brownout detection.
For engineers reviewing the MAX6353TZUK+ datasheet, MAX6353TZUK+ pinout, MAX6353TZUK+ application, or MAX6353TZUK+ equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and validated alternative options for dual-supply monitoring in industrial controllers and portable equipment.
Technical Context
The MAX6353TZUK+ monitors two independent supply rails (VCC1 and VCC2) and asserts its single active-low push-pull RST output when either falls below its respective threshold (3.08V/2.32V). Its reset logic guarantees valid output as long as at least one supply remains ≥1.0V, enabling robust operation during asymmetric rail collapse.
It includes a debounced TTL/CMOS-compatible manual-reset input (MR), supports no external components for dual-voltage supervision, and operates across –40°C to +85°C. Unlike watchdog-equipped variants (e.g., MAX6359), MAX6353TZUK+ lacks WDI functionality and third-voltage monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V (–40°C to +85°C); precise trip point for primary 3.3V rail monitoring |
| VCC2 Threshold | 2.32V ±0.07V (–40°C to +85°C); accurate detection of secondary 2.5V or 2.3V rail collapse |
| Supply Current | 20µA typical; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Reset Timeout | 100ms minimum pulse width; ensures sufficient duration for μP initialization and peripheral stabilization |
| RESET Output Type | Active-low push-pull referenced to VCC1; eliminates need for external pull-up and drives directly into CMOS inputs |
| Operating Temp | –40°C to +85°C extended range; qualified for industrial and automotive-adjacent embedded environments |
| Package | 5-pin SOT23; compact footprint compatible with high-density PCB layouts and automated assembly |
Pinout & Package
MAX6353TZUK+ is housed in a 5-pin SOT23 package (U5-1 outline, land pattern 90-0174), with pins arranged in standard top-view configuration: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Push-pull driver referenced to VCC1; sinks 1.2mA @ VCC1 ≥2.7V; valid down to VCC1 = 1V |
| 2 (GND) | Ground reference | Common return path for internal comparators, reset generator, and MR input; must be low-impedance |
| 3 (MR) | Manual-reset input | Debounced active-low control; forces RST low while asserted and holds for timeout after release |
| 4 (VCC2) | Secondary supply input | Monitors second rail (2.32V threshold); powers internal circuitry when VCC2 > VCC1; must be ≤6V |
| 5 (VCC1) | Primary supply input | Monitors main rail (3.08V threshold); powers device when VCC1 > VCC2; defines RST output voltage domain |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage precision monitoring | Simultaneously tracks 3.08V and 2.32V rails with ±0.08V/±0.07V tolerance over temperature - eliminates discrete resistor-divider supervision |
| Low-quiescent-current operation | 20µA typical ICC ensures minimal impact on system standby power budget, critical for portable/battery-powered designs |
| Guaranteed reset validity to 1V | RST remains functional even if VCC1 or VCC2 drops to 1.0V - supports graceful shutdown during deep brownout conditions |
| Integrated MR debounce | Hardware-filtered manual-reset input rejects <100ns glitches and requires no external RC network or firmware handling |
| No external components required | Self-contained dual-rail supervision without external resistors, capacitors, or pull-ups - reduces BOM count and layout area |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered by separate 3.3V logic and 2.4V analog rails must detect independent rail failures without false resets. IC Role / Device Role / Timing Role: MAX6353TZUK+ continuously monitors both rails and asserts a single synchronized RST signal only when either drops below its threshold. Use Value: Prevents spurious reboots during transient load-induced dips on one rail while the other remains stable - improves system uptime and deterministic behavior. |
Use Scenario: Handheld glucose meters use 3.3V MCU and 2.3V sensor bias rail; battery voltage decay must trigger controlled shutdown before data corruption occurs. IC Role / Device Role / Timing Role: MAX6353TZUK+ detects VCC1 (3.08V) and VCC2 (2.32V) collapse and initiates 100ms+ reset pulse to halt firmware execution safely. Use Value: Enables clean state save and display blanking prior to power loss - preserves calibration integrity and user safety compliance. |
| Network Edge Gateways | Smart Energy Meters |
Use Scenario: Dual-rail PoE-powered gateways require coordinated reset of Ethernet PHY (3.3V) and ARM core (2.5V) during input undervoltage events. IC Role / Device Role / Timing Role: MAX6353TZUK+ serves as centralized reset arbiter, asserting RST when either rail falls - ensuring atomic restart of interdependent subsystems. Use Value: Avoids partial initialization where PHY boots before core or vice versa - eliminates link flapping and firmware lockup. |
Use Scenario: Revenue-grade meters monitor 3.3V MCU supply and 2.3V RTC/sensor rail; long-term reliability demands immunity to brief transients during grid switching. IC Role / Device Role / Timing Role: MAX6353TZUK+ provides 100ms reset pulse with built-in glitch rejection on MR and transient immunity on VCC pins. Use Value: Rejects sub-100ns noise spikes and sustains reset during 100µs–1ms grid transients - meets IEC 62053-21 EMC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353TUT+ | 6-pin SOT23 package; identical electrical specs but adds unused RST2 pin (no second output) | Requires PCB redesign due to extra pin; suitable only if footprint compatibility or future upgrade path is needed | Select MAX6353TUT+ only when board layout allows 6-pin variant or when pin 1 routing benefits from larger pitch |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no VCC2 monitoring; 35µA supply current; open-drain RST | Lacks dual-rail capability - cannot replace MAX6353TZUK+ without adding external comparator for second rail | Choose TPS3808G33DBVR only for single-rail systems or when paired with discrete voltage detector for VCC2 |
Compared with MAX6353TZUK+, MAX6353TUT+ offers identical supervision functionality in a larger package with no functional advantage, while TPS3808G33DBVR provides lower-cost single-rail supervision but requires external circuitry to replicate dual-voltage monitoring - making MAX6353TZUK+ the optimal choice for space-constrained, true dual-rail applications.
Availability
MAX6353TZUK+ is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6353TZUK+ 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, communications, and consumer applications - emphasizing reliability, low power, and integration.
The MAX6351–MAX6360 family delivers dual- and triple-voltage µP supervisors optimized for multirail embedded systems where simultaneous rail monitoring and fail-safe reset generation are critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6353TZUK+?
The MAX6353TZUK+ has a factory-set 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 laser-trimmed during production and documented in the Voltage Threshold Levels table of the MAX6351–MAX6360 datasheet. The "TZ" suffix explicitly denotes this 3.08V/2.32V combination.
Does the MAX6353TZUK+ include a watchdog timer function?
No, the MAX6353TZUK+ does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants (identified by "U", "W", or "V" suffixes in the WDI-capable group). The MAX6353TZUK+ provides only dual-voltage monitoring and manual reset - confirmed by its pinout (no WDI pin) and absence of watchdog timing specs in its electrical characteristics.
What is the output drive capability of the RST pin on the MAX6353TZUK+?
The RST pin on the MAX6353TZUK+ is an active-low push-pull output referenced to VCC1, capable of sinking 1.2mA while maintaining VOL ≤0.3V (at VCC1 ≥2.7V) and 3.2mA with VOL ≤0.4V (at VCC1 ≥4.5V). It can also source limited current (VOH ≥0.8×VCC1 at 350µA for _W/_V versions), though MAX6353TZUK+ is not a _W or _V variant and relies on sink-only drive per its datasheet specifications.
Can the MAX6353TZUK+ operate with supply voltages below 2.0V?
Yes - the MAX6353TZUK+ guarantees full functionality down to VCC1 = 1.2V and VCC2 = 1.2V over temperature, with RESET output remaining valid as long as either supply stays ≥1.0V. This enables use in low-voltage systems such as 1.8V/1.2V dual-rail MCUs, provided thresholds (3.08V/2.32V) are applied to appropriately scaled rails via external divider networks - though the device itself is not rated for direct sub-1.2V operation.
Is the MAX6353TZUK+ pin-compatible with other members of the MAX6351–MAX6360 family?
The MAX6353TZUK+ uses a 5-pin SOT23 package and shares pinout compatibility with MAX6352/MAX6353/MAX6354 (all 5-pin variants), but is not pin-compatible with 6-pin parts like MAX6351 or MAX6355. Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1 - consistent across all 5-pin family members regardless of suffix or supervision mode.
MAX6353TZUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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+ FAQ
1.How can I place an order for MAX6353TZUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6353TZUK+ 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+ reliable?
The price and inventory of MAX6353TZUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6353TZUK+ is usually 5 days.
3.What payment methods are accepted for MAX6353TZUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6353TZUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6353TZUK+?
MAX6353TZUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6353TZUK+ 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+?
For technical support, including MAX6353TZUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6353TZUK+ requirements.
6.How does Aetrix verify that MAX6353TZUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6353TZUK+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6353TZUK+?
All MAX6353TZUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6353TZUK+, 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+ part is unused and in its original packaging.
Return procedure for MAX6353TZUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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