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Analog Devices Inc./Maxim Integrated MAX6355MSUT
- Part No.:
- MAX6355MSUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355MSUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,048
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Product details
Overview
The MAX6355MSUT from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with open-drain reset output, precision VCC1/VCC2 threshold monitoring (4.38V/2.93V), 100ms min reset pulse width, and an adjustable third-voltage input (RSTIN) referenced to VCC1. It operates over –40°C to +85°C in a 6-pin SOT23 package and is used in multivoltage embedded systems requiring reliable power-on and brownout detection.
For engineers reviewing the MAX6355MSUT datasheet, MAX6355MSUT pinout, MAX6355MSUT application, or MAX6355MSUT equivalent, key selection criteria include its dual-supply monitoring capability, RSTIN-based third-voltage sensing, open-drain reset architecture, and guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V.
Technical Context
The MAX6355MSUT monitors two independent supply rails (VCC1 and VCC2) using factory-trimmed voltage thresholds (4.38V and 2.93V respectively) and asserts an active-low open-drain RST output when either drops below its trip point. Its RSTIN pin provides a 1.22V ±30mV comparator input for monitoring a third voltage via external resistive divider.
It features debounced TTL/CMOS-compatible manual reset (MR) with 1µs minimum pulse width and glitch rejection, and guarantees functional reset operation as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V - enabling robust supervision during deep brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.08V - precise factory-set trip point for primary supply monitoring |
| VCC2 Threshold | 2.93V ±0.08V - precise factory-set trip point for secondary supply monitoring |
| RSTIN Threshold | 1.22V ±0.03V - fixed internal reference for third-voltage sensing via external divider |
| Reset Pulse Width | 100–280ms - ensures sufficient duration for µP initialization after power-up or fault |
| Supply Current | 20µA typical - ultra-low quiescent current enables use in battery-backed systems |
| Operating Temp | –40°C to +85°C - fully specified across industrial temperature range |
| Reset Validity | Valid down to VCC1 = 1V or VCC2 = 1V - maintains supervision during severe undervoltage |
Pinout & Package
MAX6355MSUT is housed in a 6-pin SOT23 package (JEDEC MO-178AA), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm max height. Pin 1 is RST (open-drain), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, Pin 5 is RSTIN, and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Pulled low when VCC1 < 4.38V or VCC2 < 2.93V; requires external pullup for logic-high state |
| 2 - GND | Ground reference | Common return path for all internal circuitry and monitored supplies |
| 3 - MR | Debounced manual reset input | Pull low to force reset; internally pulled up (32–100kΩ); 1µs minimum pulse width required |
| 4 - VCC2 | Secondary supply input & monitor rail | Power source and monitored voltage; trip at 2.93V; must be ≥1.2V for valid operation |
| 5 - RSTIN | Third-voltage comparator input | Monitors external voltage via resistive divider; threshold = 1.22V; powered by VCC1 |
| 6 - VCC1 | Primary supply input & monitor rail | Power source and monitored voltage; trip at 4.38V; must be ≥1.2V for valid operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC1 (4.38V) and VCC2 (2.93V) with separate trip points and hysteresis |
| Adjustable third-voltage input (RSTIN) | Enables monitoring of any voltage >1.22V using external resistor divider; no additional IC needed |
| Open-drain RST output | Allows wired-OR configuration with other reset sources and compatibility with µPs requiring open-drain reset signaling |
| Guaranteed reset validity to 1V | Ensures functional reset assertion even during deep brownout conditions on either supply rail |
| Low 20µA supply current | Minimizes system standby power draw - critical for portable/battery-powered applications |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Supervising dual-rail power (5V logic + 3.3V I/O) in programmable logic controllers where firmware corruption must be prevented during AC line sags. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting open-drain reset to halt CPU execution until both rails stabilize above 4.38V and 2.93V. Use Value: Prevents erratic behavior during partial power loss by guaranteeing reset remains asserted until both supplies meet precision thresholds. | Use Scenario: Monitoring battery-backed 3.3V main supply and 1.8V sensor interface rail in portable ultrasound devices with real-time data acquisition. IC Role / Device Role / Timing Role: Primary supervisor for two rails plus RSTIN used to monitor backup battery voltage (via divider) to trigger graceful shutdown before depletion. Use Value: Enables single-chip triple-rail supervision without adding discrete comparators or increasing BOM count. |
| Automotive Infotainment Modules | IoT Edge Gateways |
Use Scenario: Ensuring clean boot sequencing in head-unit modules powered by switched 5V and always-on 3.3V rails subject to load dump transients. IC Role / Device Role / Timing Role: Detects undershoot on either rail and holds reset active; leverages transient immunity design to avoid false triggers during ISO 7637-2 pulses. Use Value: Eliminates need for external RC filters or Schmitt triggers while maintaining robustness against automotive electrical noise. | Use Scenario: Supervising 3.3V MCU core, 1.2V DDR memory, and 5V PoE interface in compact edge gateways deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Uses RSTIN to monitor PoE-derived 5V rail (via 4.1:1 divider) while VCC1/VCC2 supervise core/memory rails - all within one 6-pin SOT23. Use Value: Reduces PCB area and component count versus discrete solutions, accelerating time-to-market for space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356MSUT | Same pinout and thresholds, but push-pull RST output referenced to VCC1 instead of open-drain | Requires no external pullup; incompatible with wired-OR reset buses or µPs needing open-drain drive | Select MAX6356MSUT only if push-pull drive is preferred and no shared reset bus exists |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN or dual-rail monitoring; 200ms reset timeout | Lacks VCC2 monitoring and third-voltage input; suitable only for single-rail systems | Use TPS3808G33DBVR only when supervising one rail and board space allows larger SOT23-6 footprint |
Compared with MAX6356MSUT, the MAX6355MSUT offers open-drain flexibility for multi-source reset arbitration; compared with TPS3808G33DBVR, it delivers true dual-rail supervision plus RSTIN expandability - making it uniquely suited for compact multivoltage systems where pin count and feature integration are critical.
Availability
MAX6355MSUT is available at Aetrix Electronics and suitable for industrial control systems, portable medical instrumentation, automotive infotainment modules, and IoT edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6355MSUT 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, mixed-signal, and power management ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family was engineered to replace discrete reset circuits in multivoltage systems, delivering integrated dual/triple-supply monitoring, manual reset, and optional watchdog functionality in minimal SOT23 footprints.
FAQ
What is the function of the RSTIN pin on the MAX6355MSUT?
The RSTIN pin on the MAX6355MSUT is a dedicated comparator input with a fixed 1.22V threshold, enabling monitoring of a third voltage rail via an external resistive divider. It is powered by VCC1 and must remain ≤ VCC1. When the divided voltage falls below 1.22V, the device asserts the RST output. This eliminates the need for an external comparator in triple-rail supervision designs.
Does the MAX6355MSUT provide watchdog timer functionality?
No, the MAX6355MSUT does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355MSUT is specifically configured for dual-voltage supervision plus RSTIN-based third-voltage monitoring, with no WDI pin or associated timing circuitry.
What are the absolute maximum ratings for VCC1 and VCC2 on the MAX6355MSUT?
The absolute maximum ratings for VCC1 and VCC2 on the MAX6355MSUT are –0.3V to +6V relative to GND. Exceeding these limits may cause permanent damage. For reliable operation, VCC1 and VCC2 must each remain within 1.2V to 5.5V, as specified in the operating conditions section of the MAX6355MSUT datasheet.
Can the MAX6355MSUT operate with only one supply connected?
Yes, the MAX6355MSUT can operate with only VCC1 or only VCC2 powered, provided the active supply is ≥1.2V. Its reset output remains valid as long as either VCC1 ≥1V or VCC2 ≥1V, and the RSTIN input is powered by VCC1 - so VCC1 must be present to use RSTIN functionality. This supports partial-power scenarios common in hot-swap or modular systems.
What is the reset timeout period specification for the MAX6355MSUT?
The MAX6355MSUT specifies a minimum reset timeout period of 100ms, with typical and maximum values of 180ms and 280ms respectively, measured from the moment VCC1 or VCC2 rises above its respective threshold. This guaranteed minimum ensures sufficient reset assertion time for reliable microprocessor initialization across the full –40°C to +85°C temperature range.
MAX6355MSUT 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:
- 2.93V, 4.38V, 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
MAX6355MSUT FAQ
1.How can I place an order for MAX6355MSUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355MSUT 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 MAX6355MSUT reliable?
The price and inventory of MAX6355MSUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355MSUT is usually 5 days.
3.What payment methods are accepted for MAX6355MSUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355MSUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355MSUT?
MAX6355MSUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355MSUT 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 MAX6355MSUT?
For technical support, including MAX6355MSUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355MSUT requirements.
6.How does Aetrix verify that MAX6355MSUT is sourced from the original manufacturer or authorized distributors?
All MAX6355MSUT 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 MAX6355MSUT meets industry standards.
7.What is the process for return or replacement of MAX6355MSUT?
All MAX6355MSUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355MSUT, 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 MAX6355MSUT part is unused and in its original packaging.
Return procedure for MAX6355MSUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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