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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 MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,115
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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, 3.08V VCC1 threshold, 2.32V VCC2 threshold, and adjustable third-voltage monitoring input (RSTIN) with 1.22V internal reference. It operates over –40°C to +85°C in a 6-pin SOT23 package and supports systems requiring reliable power-on reset, manual reset debouncing, and supply fault detection across three rails.
For engineers reviewing the MAX6355TZUT+T datasheet, MAX6355TZUT+T pinout, MAX6355TZUT+T application, or MAX6355TZUT+T equivalent, this page delivers verified electrical parameters, exact pin functions, confirmed triple-supply monitoring capability, RSTIN design implementation guidance, and validated alternatives for multivoltage embedded control and industrial instrumentation.
Technical Context
The MAX6355TZUT+T integrates dual fixed-threshold comparators for VCC1 (3.08V) and VCC2 (2.32V), plus a precision 1.22V reference for external resistive-divider-based monitoring of a third voltage via RSTIN. Reset assertion occurs if either VCC1 or VCC2 falls below its trip point, or if RSTIN drops below 1.22V.
It features an open-drain RST output with guaranteed validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, a debounced TTL/CMOS-compatible manual-reset input (MR), and no watchdog timer - distinguishing it from MAX6358/MAX6359/MAX6360 variants. Supply current is 20µA typical at full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V (–40°C to +85°C); precise factory-trimmed trip point for primary supply monitoring |
| VCC2 Threshold | 2.32V ±0.07V (–40°C to +85°C); independent secondary supply fault detection |
| RSTIN Threshold | 1.22V ±0.03V (–40°C to +85°C); enables monitoring of third voltage via external resistor divider |
| Reset Timeout Period | 100ms to 280ms; ensures stable processor initialization after power-up or fault recovery |
| Supply Current | 20µA typical (VCC1=5.5V, VCC2=3.6V); ultra-low quiescent draw for battery-backed or energy-sensitive systems |
| Operating Temperature | –40°C to +85°C; fully specified for industrial and extended-environment applications |
| Reset Output Type | Active-low open-drain; allows wired-OR configuration and flexible pull-up voltage selection |
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, 2.9mm × 1.6mm footprint, and 1.1mm max height. Pin 1 is RST (open-drain reset output), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC2, Pin 5 is RSTIN (third-voltage monitor input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (RST) | Active-low open-drain reset output | Asserts low during fault conditions; requires external pull-up; compatible with 1.8V–5.5V logic domains |
| Pin 2 (GND) | Ground reference | Common return path for all internal comparators and logic; must be low-impedance |
| Pin 3 (MR) | Debounced manual-reset input | Pull low to force reset; internally debounced; valid for VCC1 ≥ 1.0V; no external RC needed |
| Pin 4 (VCC2) | Secondary supply input & monitor rail | Provides power when > VCC1; monitored against 2.32V threshold; supports 1.2V–5.5V operation |
| Pin 5 (RSTIN) | Adjustable third-voltage monitor input | Accepts divided-down external voltage; trips at 1.22V; powered by VCC1; max VRSTIN = VCC1 |
| Pin 6 (VCC1) | Primary supply input & monitor rail | Primary power source when > VCC2; monitored against 3.08V threshold; supports 1.2V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (3.08V), VCC2 (2.32V), and third voltage via RSTIN (1.22V ref) - eliminates need for discrete comparators in multirail systems |
| Open-drain RST with wide VCC validity | RST remains functional as long as VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - ensures reset integrity during brownout or partial power loss |
| No external components required | Factory-trimmed thresholds, integrated glitch filter, and debounced MR eliminate capacitors, resistors, and timing ICs typically needed in discrete supervisor designs |
| Low 20µA supply current | Enables use in always-on, battery-powered, or energy-harvesting subsystems without compromising supervision reliability |
| Guaranteed operation over full temperature range | All electrical specs - including thresholds, reset delay, and supply current - are production-tested from –40°C to +85°C |
Applications
| Industrial PLC I/O Modules | Medical Diagnostic Handhelds |
|---|---|
|
Use Scenario: Monitoring 3.3V logic, 2.5V analog, and 1.8V sensor rails in compact field-deployable controllers. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting open-drain reset to ARM Cortex-M7 MCU and FPGA configuration logic upon any rail undervoltage. Use Value: Prevents corrupted firmware execution or misconfigured peripherals by guaranteeing synchronized reset across all voltage domains before boot. |
Use Scenario: Power sequencing and fault detection in portable ultrasound units with battery-backed real-time processing. IC Role / Device Role / Timing Role: Supervises main 3.08V system rail, 2.32V ADC reference rail, and 1.22V-derived LDO enable signal using RSTIN divider. Use Value: Enables safe shutdown and diagnostic flagging when battery voltage sags below critical thresholds - extending usable runtime while preserving data integrity. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Ensuring robust startup and brownout recovery in LIN gateway modules operating across 5V, 3.3V, and 1.2V domains. IC Role / Device Role / Timing Role: Monitors 5V supply (via RSTIN divider), 3.08V microcontroller rail, and 2.32V CAN transceiver rail; asserts shared reset line. Use Value: Eliminates need for three separate supervisors - reducing BOM count, PCB area, and qualification effort while meeting AEC-Q100 Class 2 thermal requirements. |
Use Scenario: Supervising isolated 3.3V communication interface, 2.32V metrology ADC, and 1.22V RTC backup supply in revenue-grade meters. IC Role / Device Role / Timing Role: Provides deterministic 100ms+ reset pulse on any rail failure, with RSTIN enabling precise 1.8V RTC monitoring via 2-resistor divider. Use Value: Meets IEC 62056-21 and ANSI C12.20 reset timing mandates while supporting tamper-detection logic through MR-triggered event logging. |
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 (not open-drain); identical VCC1/VCC2 thresholds and RSTIN spec | Requires direct connection to CMOS input without pull-up; unsuitable for wired-OR or mixed-voltage reset buses | Select when driving single-load MCU reset pin directly and board layout prohibits external pull-up resistor |
| TPS3808G30DBVR | Dual-voltage supervisor only (no RSTIN); 3.0V VDD1/VDD2 thresholds; 350nA quiescent current; no third-rail monitoring capability | Lacks adjustable third-voltage monitoring - cannot replace MAX6355TZUT+T in designs requiring RSTIN functionality | Consider only if system uses only two rails and ultra-low IQ (<1µA) is mandatory; RSTIN functionality must be implemented externally |
Compared with MAX6355TZUT+T, MAX6356TZUT+T offers push-pull drive for simpler MCU interfacing but forfeits wired-OR flexibility, while TPS3808G30DBVR reduces power consumption by >98% yet omits the critical third-voltage monitoring feature - making it non-substitutable where RSTIN is architecturally required.
Availability
MAX6355TZUT+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical handheld diagnostics, automotive body control units, smart energy meters, and multivoltage embedded controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
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) designs high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing applications.
The MAX6351–MAX6360 family delivers precision multivoltage supervision for systems where simultaneous monitoring of ≥2 supply rails and deterministic reset timing are essential to system-level reliability.
FAQ
What is the function of Pin 5 (RSTIN) on the MAX6355TZUT+T?
Pin 5 (RSTIN) is a precision 1.22V threshold input that enables monitoring of a third voltage rail using an external resistive divider. When the divided voltage at RSTIN falls below 1.22V, the MAX6355TZUT+T asserts its open-drain RST output. The input is powered by VCC1, and VRSTIN must not exceed VCC1. This feature allows the MAX6355TZUT+T to supervise three independent supplies without additional components.
Does the MAX6355TZUT+T include a watchdog timer?
No, the MAX6355TZUT+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355TZUT+T provides triple-voltage supervision (VCC1, VCC2, and RSTIN), manual reset debouncing, and open-drain reset output - but no WDI pin or timeout logic. Its pin 5 is RSTIN, not WDI.
What are the exact voltage thresholds for the MAX6355TZUT+T?
The MAX6355TZUT+T has a VCC1 threshold of 3.08V (±0.08V over –40°C to +85°C) and a VCC2 threshold of 2.32V (±0.07V over –40°C to +85°C). Its RSTIN input has a fixed internal reference of 1.22V (±0.03V), used to set the trip point for a third voltage via external resistor divider. These values are factory-trimmed and fully guaranteed across temperature.
Can the MAX6355TZUT+T operate with supply voltages below 3.08V on VCC1?
Yes, the MAX6355TZUT+T operates with VCC1 as low as 1.2V (minimum specified), though its VCC1 threshold remains fixed at 3.08V. Below 3.08V, the device asserts RST. Valid operation - including RST output state and MR functionality - is guaranteed as long as VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. The 3.08V threshold applies only to the trip point, not the operating range.
Is the MAX6355TZUT+T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6355TZUT+T shares the same 6-pin SOT23 (U6-1) package and pinout with MAX6356TZUT+T, MAX6357TZUT+T, MAX6358TZUT+T, MAX6359TZUT+T, and MAX6360TZUT+T. However, pin functions differ: Pin 1 is RST (open-drain) for MAX6355TZUT+T but push-pull for MAX6356/MAX6359, and Pin 5 is RSTIN (not WDI or VCC1). Direct replacement requires functional verification per variant.
MAX6355TZUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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-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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