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Analog Devices Inc./Maxim Integrated MAX6355TZUT-T
- Part No.:
- MAX6355TZUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355TZUT-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,095
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Product details
Overview
MAX6355TZUT-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with open-drain active-low reset output, monitoring VCC1 (3.08V threshold), VCC2 (2.32V threshold), and a third voltage via RSTIN (1.22V internal reference). It operates from -40°C to +85°C in a 6-pin SOT23 package and supports systems requiring reliable power-on reset, manual reset debouncing, and supply transient immunity.
For engineers reviewing the MAX6355TZUT-T datasheet, MAX6355TZUT-T pinout, MAX6355TZUT-T application, or MAX6355TZUT-T equivalent, this device serves as a precision dual-supply monitor with configurable third-voltage detection - critical for multivoltage embedded controllers, battery-powered instrumentation, and industrial computing platforms where supply sequencing and brownout protection are essential.
Technical Context
The MAX6355TZUT-T implements a dual-threshold comparator architecture: one for VCC1 (3.08V ±0.08V over temperature), another for VCC2 (2.32V ±0.07V), plus an adjustable third-input comparator referenced to 1.22V at RSTIN. Reset assertion occurs if either monitored supply falls below its trip point, and RESET remains valid down to VCC1 = 1.0V or VCC2 = 1.0V.
It features a debounced TTL/CMOS-compatible manual-reset input (MR), guaranteed glitch rejection of 100ns, and supports system-level fault detection without external components. Unlike watchdog-equipped variants (e.g., MAX6358), MAX6355TZUT-T excludes watchdog functionality - confirmed by absence of WDI pin and omission from watchdog timing tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V (–40°C to +85°C); precise detection of 3.3V rail collapse with 50mV hysteresis |
| VCC2 Threshold | 2.32V ±0.07V (–40°C to +85°C); enables robust monitoring of 2.5V or 2.3V auxiliary supplies |
| RSTIN Reference | 1.22V ±6mV (–40°C to +85°C); allows external resistive divider to set custom third-voltage trip points |
| Reset Timeout | 100ms min (180ms typ); ensures sufficient processor initialization time after power-up or reset event |
| Supply Current | 20µA max (typ 20µA at 5.5V/3.6V); ultra-low quiescent draw for battery-backed or energy-sensitive systems |
| Operating Temp | –40°C to +85°C; fully specified performance across industrial temperature range |
| RESET Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; guarantees reset assertion integrity during deep brownout conditions |
Pinout & Package
MAX6355TZUT-T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 0.95mm pitch and 2.9mm × 1.6mm footprint. The package supports reflow soldering and is rated for extended temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST (open-drain) | Active-low reset output; requires external pullup; asserts when any monitored supply fails or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system ground plane |
| 3 | MR | Debounced manual-reset input; falling edge forces reset; internally pulled up (~63.5kΩ); compatible with TTL/CMOS |
| 4 | VCC2 | Secondary supply input and monitor rail; powers internal circuitry when VCC2 > VCC1; threshold = 2.32V |
| 5 | RSTIN | Adjustable undervoltage comparator input; referenced to 1.22V; used to monitor third voltage via external resistor divider |
| 6 | VCC1 | Primary supply input and monitor rail; powers internal circuitry when VCC1 > VCC2; threshold = 3.08V |
Key Features
| Feature | Design Value |
|---|---|
| Precision triple-voltage monitoring | Simultaneously tracks VCC1 (3.08V), VCC2 (2.32V), and third voltage via RSTIN (1.22V ref) - eliminates need for discrete supervisors in multirail systems |
| No external components required | Fully integrated comparators, hysteresis, and reset timer enable direct connection to µP reset pins without RC networks or additional ICs |
| Low-power operation | 20µA max supply current enables use in always-on, battery-critical applications such as portable medical devices and remote sensors |
| Robust reset validity | RESET remains asserted and electrically valid even as VCC1 or VCC2 drops to 1.0V - critical for controlled shutdown during brownouts |
| Transient-immune design | Rejects negative VCC transients ≤100ns at 100mV overdrive - prevents false resets in noisy industrial environments |
Applications
| Industrial Controllers | Battery-Powered Instruments |
|---|---|
|
Use Scenario: Programmable logic controllers (PLCs) with separate 3.3V I/O, 2.5V FPGA core, and 1.2V ADC reference rails. IC Role / Device Role / Timing Role: Supervises all three rails; asserts open-drain RESET to halt CPU execution until all supplies stabilize post-power-up or fault. Use Value: Prevents metastability and configuration corruption during supply sequencing - verified by 100ms min reset pulse width and 1.22V RSTIN flexibility. |
Use Scenario: Handheld gas analyzers powered by single-cell Li-ion (3.0–4.2V) with regulated 3.08V MCU rail and 2.32V sensor bias rail. IC Role / Device Role / Timing Role: Monitors main rail (VCC1), sensor rail (VCC2), and battery voltage (via RSTIN divider) to trigger graceful shutdown before cutoff. Use Value: Enables accurate low-battery warning and safe state preservation using factory-trimmed thresholds and sub-1V reset validity. |
| Embedded Computing Platforms | Intelligent Power Modules |
|
Use Scenario: Fanless edge compute modules with dual-core ARM SoC requiring coordinated 3.3V I/O, 2.5V memory, and 1.2V core voltage supervision. IC Role / Device Role / Timing Role: Provides single-chip triple-rail monitoring with MR input for firmware-initiated reset and RSTIN for optional thermal shutdown signal injection. Use Value: Reduces BOM count vs. dual-supervisor solutions while maintaining independent trip points and guaranteed reset timing. |
Use Scenario: Motor drive inverters with isolated gate drivers powered by 15V, 5V, and 3.3V rails - where failure of any rail must halt PWM immediately. IC Role / Device Role / Timing Role: Acts as safety-critical supervisor: monitors primary control rail (VCC1), isolated logic rail (VCC2), and driver enable voltage (RSTIN). Use Value: Delivers fail-safe reset within 100ms of undervoltage detection - validated over full –40°C to +85°C range with no derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356TZUT-T | Push-pull RST output referenced to VCC1 (vs. open-drain on MAX6355TZUT-T); identical VCC1/VCC2 thresholds and RSTIN specs | Eliminates need for external pullup resistor; better suited for direct µP reset pin drive without level-shifting | Select MAX6356TZUT-T when driving CMOS reset inputs directly; choose MAX6355TZUT-T when interfacing with open-collector buses or legacy designs requiring pullup flexibility |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); 3.3V fixed VDD threshold; 1.2V adjustable input via resistor divider; no third-voltage capability | Lacks dedicated third-rail monitoring - requires external comparator or second IC to replicate MAX6355TZUT-T's triple-voltage function | Use TPS3808G33DBVR only in dual-rail systems where third-voltage supervision is handled separately; MAX6355TZUT-T remains superior for true triple-monitor integration |
Compared with MAX6356TZUT-T, MAX6355TZUT-T offers open-drain flexibility for bus sharing and mixed-voltage interfaces, while TPS3808G33DBVR lacks native third-supply monitoring - making MAX6355TZUT-T the only single-package solution for applications requiring simultaneous VCC1, VCC2, and RSTIN supervision with factory-trimmed accuracy.
Availability
MAX6355TZUT-T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered instruments, and embedded computing platforms requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6355TZUT-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, automotive, and communications markets.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor systems requiring precise, low-power, and highly reliable power-supply supervision - with emphasis on factory-trimmed thresholds, wide temperature operation, and minimal external component count.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6355TZUT-T?
The MAX6355TZUT-T has a factory-trimmed VCC1 threshold of 3.08V, with tolerance of ±0.08V over the full –40°C to +85°C operating temperature range. This value is specified in the Voltage Threshold Levels table and confirmed in the Electrical Characteristics section under "VCC1 Threshold (Note 3)" for suffix "T_", where MIN = 3.00V and MAX = 3.15V at temperature extremes.
Does the MAX6355TZUT-T include a watchdog timer function?
No, the MAX6355TZUT-T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants, which feature WDI pins and corresponding timeout specifications. The MAX6355TZUT-T pinout shows Pin 5 as RSTIN (not WDI), and its Selector Guide entry confirms "WATCHDOG TIMER" is marked "-" for MAX6355.
What is the purpose of the RSTIN pin on the MAX6355TZUT-T?
The RSTIN pin on the MAX6355TZUT-T provides an adjustable undervoltage detection input referenced to an internal 1.22V comparator. When used with an external resistive divider, it enables monitoring of a third voltage rail - for example, battery voltage or thermal sensor output - with trip-point accuracy of ±6mV over temperature.
Can the MAX6355TZUT-T operate with supply voltages below 2.0V?
Yes, the MAX6355TZUT-T guarantees operation down to VCC1 = 1.2V and VCC2 = 1.2V over temperature, and its RESET output remains valid as long as either supply stays above 1.0V. However, the VCC1 and VCC2 thresholds (3.08V and 2.32V) require those rails to exceed their respective trip points to keep RESET deasserted - so functional supervision requires nominal supply levels above threshold.
Is the MAX6355TZUT-T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6355TZUT-T shares the same 6-pin SOT23 package and pinout as MAX6356TZUT-T and MAX6357TZUT-T (Pin 1=RST, Pin 2=GND, Pin 3=MR, Pin 4=VCC2, Pin 5=RSTIN, Pin 6=VCC1), but differs functionally from MAX6358–MAX6360 (which have WDI instead of RSTIN) and from 5-pin variants like MAX6352. Pin compatibility is limited to the RSTIN-series 6-pin parts.
MAX6355TZUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.32V, 3.08V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6355TZUT-T FAQ
1.How can I place an order for MAX6355TZUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355TZUT-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 MAX6355TZUT-T reliable?
The price and inventory of MAX6355TZUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355TZUT-T is usually 5 days.
3.What payment methods are accepted for MAX6355TZUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355TZUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355TZUT-T?
MAX6355TZUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355TZUT-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 MAX6355TZUT-T?
For technical support, including MAX6355TZUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355TZUT-T requirements.
6.How does Aetrix verify that MAX6355TZUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6355TZUT-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 MAX6355TZUT-T meets industry standards.
7.What is the process for return or replacement of MAX6355TZUT-T?
All MAX6355TZUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355TZUT-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 MAX6355TZUT-T part is unused and in its original packaging.
Return procedure for MAX6355TZUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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