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Analog Devices Inc./Maxim Integrated MAX6455UT23S
- Part No.:
- MAX6455UT23S
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6455UT23S.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
MAX6455UT23S from Maxim Integrated is a dual-output, low-power µP supervisor IC with separate VCC reset and manual reset outputs, factory-set 2.313V VCC reset threshold, 0.63V adjustable RSTIN input, and 3.36s extended MR setup timeout. It supports soft-system interrupt (MROUT) and hard-system reboot (RESET) in SOT23-6 packaging for embedded power monitoring in consumer electronics and industrial equipment.
For engineers reviewing the MAX6455UT23S datasheet, MAX6455UT23S pinout, MAX6455UT23S application, or MAX6455UT23S equivalent, this page delivers verified electrical parameters, confirmed dual-reset timing behavior, validated SOT23-6 terminal mapping, and real-world soft/hard reset implementation guidance - all specific to the MAX6455UT23S variant.
Technical Context
The MAX6455UT23S implements a dual-comparator architecture: one precision bandgap reference comparator monitors VCC against its fixed 2.313V threshold, while a second high-impedance comparator monitors RSTIN against 0.63V, enabling external voltage divider-based threshold adjustment down to 0.63V. Both comparators feed independent reset logic paths.
Its MR input controls both MROUT and RESET outputs: short MR pulses (<3.36s) assert only MROUT for nonmaskable interrupt signaling; sustained MR assertion (≥3.36s) additionally triggers RESET for full system reboot. Reset timeout is guaranteed ≥140ms after recovery, with valid operation down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.313V ±1.5% - factory-trimmed precision threshold for primary supply monitoring |
| RSTIN Threshold | 0.630V ±5mV - fixed internal reference enabling adjustable secondary voltage monitoring via resistor divider |
| MR Extended Setup Period | 3.36s typical - minimum MR low duration required to assert RESET output alongside MROUT |
| Reset Timeout Period | 140ms minimum - guaranteed minimum assertion time for both RESET and MROUT after recovery |
| Supply Current | 6µA typical at 3.6V - ultra-low quiescent current enabling battery-backed or always-on supervision |
| Operating Voltage Range | 1.0V to 5.5V - ensures valid RESET output state even during deep brownout conditions |
| Output Type | Active-low push-pull - eliminates need for external pullup resistors on RESET and MROUT |
Pinout & Package
MAX6455UT23S is housed in a 6-pin SOT23 package (package code U6-1), measuring 2.9mm × 1.6mm × 1.1mm, fully specified over -40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts when VCC < 2.313V or RSTIN < 0.63V, or when MR held low ≥3.36s; deasserts ≥140ms after recovery |
| 2 | GND | Ground reference for all internal circuitry and comparator inputs |
| 3 | MROUT | Active-low push-pull manual reset output; asserts immediately on MR low; remains asserted ≥140ms after MR high |
| 4 | VCC | Main power supply input and primary voltage monitor source; powers internal circuitry and enables reset assertion down to 1.0V |
| 5 | RSTIN | High-impedance adjustable reset input; referenced to 0.63V internal threshold; used with external resistor divider to monitor secondary voltages |
| 6 | MR | Manual reset input with internal 50kΩ pullup to VCC; controls both MROUT (immediate) and RESET (after 3.36s min) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Separate MROUT (soft-interrupt) and RESET (hard-reboot) signals enable staged system recovery without firmware intervention |
| Extended MR setup timeout | 3.36s MR low duration required to trigger RESET allows single pushbutton to serve both NMI and full reset functions |
| Adjustable secondary voltage monitoring | RSTIN input with 0.63V reference supports monitoring of any voltage ≥0.63V using two high-value resistors, minimizing current draw |
| Guaranteed reset validity down to VCC = 1.0V | Ensures reliable processor reset initiation even during severe brownout, before most µPs lose functional operation |
| Transient immunity | Immune to VCC glitches ≤20µs when falling 100mV below threshold, preventing spurious resets in noisy environments |
Applications
| Set-Top Box Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
Use Scenario: Monitors 3.3V core and 1.2V I/O rails in a cable set-top box during cold start and brownout events. IC Role / Device Role / Timing Role: MAX6455UT23S provides independent reset assertion for main SoC (via RESET) and peripheral FPGA (via MROUT) based on rail status and user button press duration. Use Value: Enables graceful data save on MROUT interrupt before forced reboot via RESET, reducing firmware corruption risk during unstable power. |
Use Scenario: Supervises 24V DC-DC converter output and isolated 5V logic supply in an industrial programmable logic controller. IC Role / Device Role / Timing Role: MAX6455UT23S uses RSTIN to monitor the 24V rail (via resistor divider) and VCC to monitor 5V logic, asserting MROUT for watchdog-triggered diagnostics and RESET for full controller restart. Use Value: Dual-threshold capability eliminates need for discrete comparators, reducing BOM count while supporting both fault logging and safe shutdown sequences. |
| Medical Infusion Pump Safety Monitoring | Automotive Telematics ECU Boot Integrity |
Use Scenario: Ensures deterministic startup and fault response in a battery-powered infusion pump with dual-voltage microcontroller subsystem. IC Role / Device Role / Timing Role: MAX6455UT23S monitors main 3.6V Li-ion supply (VCC) and backup 3.0V supercap rail (RSTIN) to guarantee reset assertion if either falls below safe operating level. Use Value: Push-pull outputs drive safety-critical reset lines directly without pullups, meeting IEC 62304 Class C reliability requirements for fail-safe behavior. |
Use Scenario: Validates stable 5V and 1.8V supplies during boot of a cellular-connected automotive telematics unit exposed to load-dump transients. IC Role / Device Role / Timing Role: MAX6455UT23S leverages its 140ms minimum reset timeout and transient immunity to ignore <20µs supply dips while ensuring clean boot after sustained undervoltage. Use Value: Factory-trimmed 2.313V threshold matches common 2.5V nominal rail tolerances, eliminating calibration effort in production test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6455UT23D | Same 2.313V VCC threshold and 3.36s MR setup, but open-drain outputs requiring external pullups | Suitable where level-shifting to higher-voltage logic (e.g., 5V µP reset input) is needed | Select MAX6455UT23D only if interfacing to non-3.3V logic families; otherwise MAX6455UT23S reduces component count |
| MAX6453UT23S | Identical 2.313V VCC threshold and SOT23-6 package, but MR input controls only MROUT - RESET is VCC/RSTIN-only | Appropriate for designs requiring independent manual interrupt without affecting main reset path | Choose MAX6453UT23S when soft-reset and hard-reset must be decoupled; MAX6455UT23S is required for combined pushbutton control. |
Compared with MAX6455UT23D, MAX6455UT23S eliminates external pullup resistors and simplifies layout; compared with MAX6453UT23S, it adds MR-gated RESET functionality essential for unified front-panel reset design - making it the only choice for interrupt-before-reboot architectures.
Availability
MAX6455UT23S is available at Aetrix Electronics and suitable for set-top box manufacturing, industrial PLC development, medical device production, and automotive telematics programs requiring stable component supply across long product lifecycles.
Supply support for MAX6455UT23S 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 MAX6453–MAX6456 family was designed specifically for dual-rail microprocessor supervision with independent soft/hard reset control, targeting space-constrained embedded systems needing reliable power-up, brownout, and user-initiated recovery.
FAQ
What is the exact VCC reset threshold voltage for MAX6455UT23S?
The MAX6455UT23S has a factory-trimmed VCC reset threshold of 2.313V, with ±1.5% tolerance over temperature. This value is permanently laser-trimmed during wafer sort and is not adjustable. The "23" suffix in MAX6455UT23S directly references this 2.313V threshold per Table 1 of the datasheet, and the parameter is guaranteed across the full -40°C to +85°C operating range.
How does the MR input of MAX6455UT23S differ from MAX6453UT23S?
The MR input of MAX6455UT23S controls both MROUT and RESET outputs: brief MR assertion triggers only MROUT, while sustained MR low ≥3.36s also asserts RESET. In contrast, MAX6453UT23S MR affects only MROUT - its RESET output responds exclusively to VCC or RSTIN faults. This makes MAX6455UT23S uniquely suited for single-button interrupt-and-reboot functionality.
Can MAX6455UT23S monitor a 1.2V supply using the RSTIN pin?
Yes. The MAX6455UT23S RSTIN pin has a fixed 0.63V internal threshold. To monitor a 1.2V supply, connect it to RSTIN through a resistor divider where R1/R2 = (1.2V / 0.63V) − 1 ≈ 0.905. For example, use R2 = 250kΩ and R1 = 226kΩ. This configuration maintains high input impedance (>100MΩ) and draws <50nA, preserving system efficiency.
What is the minimum VCC voltage at which MAX6455UT23S guarantees valid RESET output operation?
The MAX6455UT23S guarantees correct RESET output logic state down to VCC = 1.0V, as specified in the Electrical Characteristics table. Below 1.0V, output sinking capability degrades rapidly. This feature ensures reliable reset assertion during deep brownout conditions before the microprocessor loses functional integrity, a critical requirement for fail-safe embedded systems.
Is MAX6455UT23S pin-compatible with other devices in the MAX6453–MAX6456 family?
Yes, all MAX6453–MAX6456 variants, including MAX6455UT23S, share identical SOT23-6 pinouts and footprint. Pin 1 is RESET, Pin 2 is GND, Pin 3 is MROUT, Pin 4 is VCC, Pin 5 is RSTIN, and Pin 6 is MR. This allows direct substitution within the family for different threshold or output-type requirements without PCB redesign.
MAX6455UT23S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.313V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6455UT23S FAQ
1.How can I place an order for MAX6455UT23S through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6455UT23S 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 MAX6455UT23S reliable?
The price and inventory of MAX6455UT23S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6455UT23S is usually 5 days.
3.What payment methods are accepted for MAX6455UT23S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6455UT23S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6455UT23S?
MAX6455UT23S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6455UT23S 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 MAX6455UT23S?
For technical support, including MAX6455UT23S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6455UT23S requirements.
6.How does Aetrix verify that MAX6455UT23S is sourced from the original manufacturer or authorized distributors?
All MAX6455UT23S 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 MAX6455UT23S meets industry standards.
7.What is the process for return or replacement of MAX6455UT23S?
All MAX6455UT23S units undergo pre-shipment inspection (PSI). If there is an issue with MAX6455UT23S, 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 MAX6455UT23S part is unused and in its original packaging.
Return procedure for MAX6455UT23S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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