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Analog Devices Inc./Maxim Integrated MAX6355LTUT+
- Part No.:
- MAX6355LTUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355LTUT+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,280
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Product details
Overview
MAX6355LTUT+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with open-drain active-low reset output, 4.63V VCC1 threshold, 3.08V VCC2 threshold, and adjustable third-voltage monitoring input (RSTIN) with 1.22V internal reference-designed for multivoltage embedded systems requiring guaranteed reset validity down to VCC1 = 1V or VCC2 = 1V.
For engineers reviewing the MAX6355LTUT+ datasheet, MAX6355LTUT+ pinout, MAX6355LTUT+ application, or MAX6355LTUT+ equivalent, this page delivers verified specifications, SOT23-6 package mapping, RSTIN-based third-supply monitoring capability, and design-critical timing parameters including 100ms min reset timeout and 20µA supply current.
Technical Context
The MAX6355LTUT+ monitors three independent supply rails: VCC1 (4.63V threshold), VCC2 (3.08V threshold), and an external voltage via RSTIN with factory-trimmed 1.22V comparator reference. Reset assertion occurs if any monitored rail falls below its threshold, and the open-drain RST output remains valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V.
It features debounced TTL/CMOS-compatible manual-reset input (MR), supports resistive-divider configuration for third-rail thresholds above 1.22V, and guarantees operation across –40°C to +85°C with ±20ppm/°C reset threshold tempco and 100ms–280ms reset timeout period.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V (±0.09V at +25°C); precise factory-set trip point for primary supply monitoring |
| VCC2 Threshold | 3.08V (±0.05V at +25°C); independent secondary supply detection level |
| RSTIN Threshold | 1.22V (±0.03V at +25°C); internal reference enabling third-rail monitoring via external resistor divider |
| Reset Timeout | 100–280ms; ensures reliable processor initialization before release |
| Supply Current | 20µA typical; 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 Output Type | Active-low open-drain; allows wired-OR configuration and flexible pull-up voltage selection |
Pinout & Package
MAX6355LTUT+ is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), RoHS-compliant with lead(Pb)-free termination (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pull-up; asserted when any monitored supply drops below threshold |
| 2 | GND | Ground reference for all internal circuitry and comparator inputs |
| 3 | MR | Debounced manual-reset input; low pulse forces reset regardless of supply status |
| 4 | VCC2 | Secondary supply input and monitor rail; powers device when VCC2 > VCC1; threshold = 3.08V |
| 5 | RSTIN | Adjustable third-voltage monitor input; referenced to VCC1; internal 1.22V comparator enables external rail monitoring |
| 6 | VCC1 | Primary supply input and monitor rail; powers device when VCC1 > VCC2; threshold = 4.63V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous supervision of VCC1 (4.63V), VCC2 (3.08V), and third rail via RSTIN with 1.22V reference |
| Open-drain RST output | Enables shared reset bus with multiple devices and flexible pull-up voltage selection up to 5.5V |
| Guaranteed reset validity | RESET remains functional even if one supply collapses to 1.0V-critical for brownout resilience |
| Low-power operation | 20µA typical ICC ensures minimal impact on battery life in portable equipment |
| Temperature-stable thresholds | ±20ppm/°C tempco ensures <±0.5% drift over –40°C to +85°C |
Applications
| Industrial PLCs | Medical Diagnostic Devices |
|---|---|
Use Scenario: Monitoring dual-core processor supplies (5V I/O, 3.3V core) plus auxiliary sensor rail (2.5V) in programmable logic controllers. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting system-wide reset on any rail undervoltage, with 100ms minimum pulse width ensuring firmware boot integrity. Use Value: Eliminates need for discrete comparators and RC timers, reducing BOM count and PCB area while guaranteeing coordinated reset across heterogeneous power domains. | Use Scenario: Supervising main 5V supply, isolated 3.3V analog front-end, and 1.8V FPGA configuration rail in portable ultrasound units. IC Role / Device Role / Timing Role: RSTIN input configured via resistor divider to monitor 1.8V rail at exact 1.8V threshold; open-drain RST interfaces cleanly with mixed-voltage reset tree. Use Value: Enables single-chip supervision of three non-standard rails without external components-reducing risk of reset timing skew and improving diagnostic reliability. |
| Battery-Powered IoT Gateways | Automotive Infotainment Modules |
Use Scenario: Managing Li-ion backup (3.6V), main 3.3V SoC supply, and 1.2V DDR memory rail in edge-node gateways. IC Role / Device Role / Timing Role: Uses RSTIN to monitor DDR rail via 1.22V reference + resistor network; MR input supports hardware-initiated recovery during deep-sleep wake events. Use Value: 20µA supply current extends battery runtime; guaranteed reset validity down to 1.0V per rail prevents spurious resets during battery sag. | Use Scenario: Supervising 5V MCU supply, 3.3V CAN transceiver rail, and 2.8V display controller supply in head-unit designs. IC Role / Device Role / Timing Role: Dual-threshold detection (4.63V/3.08V) covers nominal 5V/3.3V rails; RSTIN monitors 2.8V rail using 1.22V reference + precision divider. Use Value: Meets AEC-Q100 stress requirements via –40°C to +85°C full-spec operation and power-supply transient immunity up to 100µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356LTUT+ | Same package and thresholds, but push-pull RST1 output referenced to VCC1 instead of open-drain | Requires VCC1-referenced pull-up; incompatible with wired-OR reset buses | Select MAX6356LTUT+ only when push-pull drive into dedicated MCU reset pin is required |
| TPS3808G33DBVR | Dual-supply monitor (no RSTIN); fixed 3.3V threshold; 1.25V enable input instead of adjustable third rail | Lacks third-voltage monitoring capability; cannot replace RSTIN functionality without added circuitry | Choose TPS3808G33DBVR only for dual-rail systems where third-rail supervision is handled separately |
Compared with MAX6355LTUT+, MAX6356LTUT+ offers stronger drive but sacrifices bus-sharing flexibility, while TPS3808G33DBVR reduces cost and size in dual-rail applications but omits the critical RSTIN feature needed for true triple-voltage supervision.
Availability
MAX6355LTUT+ is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic devices, battery-powered IoT gateways, and automotive infotainment modules requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6355LTUT+ 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, communications, and consumer applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage embedded systems needing coordinated reset generation across three independent supply rails-with emphasis on low power, wide temperature operation, and minimal external components.
FAQ
What is the function of the RSTIN pin on the MAX6355LTUT+?
The RSTIN pin on the MAX6355LTUT+ is an adjustable third-voltage monitor input with a factory-trimmed 1.22V internal reference comparator. It allows supervision of a third supply rail (e.g., 1.8V or 2.5V) by connecting an external resistive divider between that rail and ground, with the divider's midpoint fed to RSTIN. The pin is powered from VCC1 and must not exceed VCC1 in voltage. This feature enables true triple-supply monitoring without additional ICs.
Does the MAX6355LTUT+ provide watchdog timer functionality?
No, the MAX6355LTUT+ does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355LTUT+ is a triple-voltage supervisor with manual reset (MR) and RSTIN-based third-rail monitoring, but no WDI input or timeout logic. Its reset behavior is purely voltage-threshold-driven.
What are the exact voltage thresholds for the MAX6355LTUT+?
The MAX6355LTUT+ has a VCC1 threshold of 4.63V (±0.09V at +25°C) and a VCC2 threshold of 3.08V (±0.05V at +25°C). These values are factory-trimmed and guaranteed over –40°C to +85°C. The RSTIN input uses a fixed 1.22V (±0.03V at +25°C) internal reference, enabling precise third-rail monitoring via external resistor divider.
Is the MAX6355LTUT+ pin-compatible with other devices in the MAX6351–MAX6360 family?
Yes, the MAX6355LTUT+ shares the same 6-pin SOT23 (U6-1) package and pinout as MAX6351, MAX6356, MAX6357, MAX6358, MAX6359, and MAX6360. Pin 1 is RST, Pin 5 is RSTIN (not WDI or RST2), and Pin 6 is VCC1-matching the documented MAX6355 pin configuration. However, functional differences (e.g., open-drain vs. push-pull output, presence/absence of WDI) mean electrical compatibility must be verified per application.
What is the minimum supply voltage required for the MAX6355LTUT+ to maintain valid reset output?
The MAX6355LTUT+ guarantees valid reset output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V-enabling robust operation during brownout conditions. This specification is fully tested and guaranteed over the –40°C to +85°C temperature range. Below 1.0V on both rails, reset behavior is undefined, and the device enters undervoltage lockout.
MAX6355LTUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 3.08V, 4.63V, 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
MAX6355LTUT+ FAQ
1.How can I place an order for MAX6355LTUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355LTUT+ 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 MAX6355LTUT+ reliable?
The price and inventory of MAX6355LTUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355LTUT+ is usually 5 days.
3.What payment methods are accepted for MAX6355LTUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355LTUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355LTUT+?
MAX6355LTUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355LTUT+ 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 MAX6355LTUT+?
For technical support, including MAX6355LTUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355LTUT+ requirements.
6.How does Aetrix verify that MAX6355LTUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6355LTUT+ 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 MAX6355LTUT+ meets industry standards.
7.What is the process for return or replacement of MAX6355LTUT+?
All MAX6355LTUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355LTUT+, 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 MAX6355LTUT+ part is unused and in its original packaging.
Return procedure for MAX6355LTUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6355LTUT+ Tags
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MIC826SYMT-TR
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