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Analog Devices Inc./Maxim Integrated MAX6455UT29S
- Part No.:
- MAX6455UT29S
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6455UT29S.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,182
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Product details
Overview
MAX6455UT29S from Maxim Integrated is a dual-output, low-power µP supervisor IC with factory-set 2.925V VCC reset threshold and adjustable secondary voltage monitoring down to 0.63V. It provides separate active-low push-pull RESET and MROUT outputs, supports soft-system interrupt (MROUT) and hard-system reboot (RESET) via a single manual reset input, and guarantees valid reset operation down to VCC = 1.0V. Used in set-top boxes and industrial equipment for reliable power-on/power-fail supervision.
For engineers reviewing the MAX6455UT29S datasheet, MAX6455UT29S pinout, MAX6455UT29S application, or MAX6455UT29S equivalent, this page delivers verified electrical parameters, SOT23-6 package details, timing behavior of the extended MR setup period (3.36s), reset timeout (140ms min), and functional distinctions between MAX6455/MAX6456 and MAX6453/MAX6454 variants.
Technical Context
The MAX6455UT29S implements a dual-comparator architecture: one precision bandgap-based comparator monitors VCC against its fixed 2.925V threshold, while a high-impedance (±25nA) comparator monitors RSTIN against a fixed 0.63V reference-enabling external resistor-divider configuration for secondary supply monitoring. Its MR input controls both outputs: short press (<3.36s) asserts only MROUT; long press (≥3.36s) asserts both MROUT and RESET.
This dual-trigger logic enables interrupt-before-reset functionality: MROUT drives an NMI for data preservation, while RESET initiates full system reboot. The device uses BiCMOS process, operates from -40°C to +85°C, and maintains guaranteed reset assertion down to VCC = 1.0V with only 6µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.925V ±1.5% - precisely sets brownout detection point for primary 3.3V rail without external components. |
| RSTIN Threshold | 0.630V ±1.6% - enables accurate monitoring of secondary supplies (e.g., 1.5V core) using external resistor divider. |
| Reset Timeout Period | 140ms minimum - ensures microprocessor completes full reset sequence before release, meeting JEDEC JESD78 requirements. |
| MR Extended Setup Period | 3.36s typical - distinguishes short-press (NMI/interrupt) from long-press (full reboot) on shared pushbutton. |
| Supply Current | 6µA typical at 3.6V - minimizes quiescent load in battery-backed or energy-sensitive systems. |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions. |
| Output Type | Active-low push-pull RESET and MROUT - eliminates need for external pull-up resistors and simplifies interface to CMOS inputs. |
Pinout & Package
MAX6455UT29S is housed in a 6-pin SOT23-6 package (package code U6-1), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant, with standard land pattern 90-0175.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low when VCC < 2.925V or RSTIN < 0.63V; remains low ≥140ms after recovery; also asserted when MR held ≥3.36s. |
| 2 - GND | Ground reference | Common return path for internal comparators, reset drivers, and bias circuitry; must be low-impedance connection. |
| 3 - MROUT | Active-low push-pull manual reset output | Asserts immediately on MR low; remains low ≥140ms after MR high; independent of VCC status for NMI use. |
| 4 - VCC | Primary supply input | Powers internal circuitry and sets reference for VCC monitor; valid operation supported from 1.0V to 5.5V. |
| 5 - RSTIN | Adjustable reset input | High-impedance (±25nA) node referenced to 0.63V; connects to center tap of external resistor divider for secondary supply monitoring. |
| 6 - MR | Manual reset input | Internally pulled up to VCC (50kΩ); falling edge initiates MROUT; sustained low ≥3.36s triggers RESET assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Separate RESET (hard reboot) and MROUT (soft interrupt) enable layered system recovery without firmware dependency. |
| Extended MR setup timeout (3.36s) | Allows single pushbutton to serve dual functions: brief press triggers NMI; long press triggers full reset-reducing BOM count. |
| Guaranteed reset down to VCC = 1.0V | Ensures deterministic processor reset state even during severe brownout, eliminating race conditions in low-VCC startup. |
| 0.63V RSTIN reference with ±25nA leakage | Permits ultra-low-power secondary supply monitoring (e.g., 1.2V/1.5V rails) with minimal divider current (sub-1µA). |
| 140ms minimum reset timeout | Meets industry-standard minimum reset pulse width for ARM Cortex-M, PIC, and other embedded microcontrollers. |
Applications
| Set-Top Box Power Supervision | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 3.3V main rail and 1.5V FPGA core rail in cable set-top box; detects brownout during ESD event or power sag. IC Role / Device Role / Timing Role: MAX6455UT29S acts as primary power supervisor-asserting MROUT for firmware-safe shutdown and RESET for cold reboot if recovery fails. Use Value: Prevents corrupted firmware writes during unstable power by enforcing 140ms reset hold time and enabling graceful NMI-driven state save. |
Use Scenario: Embedded in DIN-rail mounted PLC module to supervise 24V-to-3.3V DC/DC output and isolated 5V I/O rail. IC Role / Device Role / Timing Role: MAX6455UT29S provides dual-voltage monitoring with RSTIN configured for 5V rail via 7.93kΩ/1.07kΩ divider; MR linked to front-panel service button. Use Value: Enables field-service technicians to trigger diagnostic NMI (short press) or full controller reset (long press) without opening enclosure. |
| Medical Infusion Pump Controller | Automotive Telematics Unit |
|
Use Scenario: Supervises 3.3V MCU supply and 1.8V sensor interface rail in battery-powered infusion pump with strict safety-critical uptime requirements. IC Role / Device Role / Timing Role: MAX6455UT29S serves as fail-safe watchdog-using RSTIN to monitor backup LDO output and asserting RESET if either rail collapses below threshold. Use Value: Guarantees deterministic MCU reset at VCC = 1.0V, preventing undefined behavior during battery depletion or transient load dump. |
Use Scenario: Integrated into LTE-connected telematics control unit to supervise main 5V supply and 3.3V CAN transceiver rail under automotive temperature (-40°C to +85°C) and vibration stress. IC Role / Device Role / Timing Role: MAX6455UT29S performs dual-rail monitoring with push-pull outputs directly driving MCU reset and CAN controller interrupt pins. Use Value: Eliminates external pull-ups and reduces layout sensitivity to noise-critical for EMC compliance in 12V automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6455UT29D | Same 2.925V threshold and 3.36s MR setup, but open-drain outputs instead of push-pull. | Requires external pull-up resistors; suited for level-shifting or wired-OR reset bus configurations. | Select MAX6455UT29D only if interfacing to mixed-voltage systems where RESET must drive multiple logic families. |
| MAX6453UT29S | Identical 2.925V threshold and SOT23-6 package, but MR input controls MROUT only-RESET is VCC/RSTIN-triggered only. | Lacks extended MR setup; cannot generate hard reset from manual input-only soft interrupt via MROUT. | Choose MAX6453UT29S when system design separates interrupt and reboot functions onto different physical buttons. |
Compared with MAX6455UT29S, MAX6455UT29D trades push-pull simplicity for voltage-level flexibility, while MAX6453UT29S sacrifices MR-controlled hard reset capability for simpler, dedicated interrupt-only operation-making MAX6455UT29S optimal for space-constrained designs requiring dual-mode reset from one button.
Availability
MAX6455UT29S is available at Aetrix Electronics and suitable for set-top boxes, industrial PLCs, medical infusion pumps, and automotive telematics units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6455UT29S 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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, medical, and communications systems.
The MAX6453–MAX6456 family was engineered specifically for dual-rail microprocessor supervision with integrated soft/hard reset differentiation-addressing reliability gaps in consumer and industrial embedded systems where single-button user interaction must support both data preservation and full recovery.
FAQ
What is the exact reset threshold voltage for MAX6455UT29S?
The MAX6455UT29S has a factory-trimmed VCC reset threshold of 2.925V ±1.5%, confirmed in Table 1 and Electrical Characteristics section of the datasheet. This value is laser-trimmed during production and applies specifically to the "29" suffix variant. The RSTIN input uses a fixed 0.630V reference, enabling precise secondary rail monitoring via external resistor divider.
How does the manual reset input behave on MAX6455UT29S compared to MAX6453UT29S?
On MAX6455UT29S, the MR input controls both MROUT and RESET outputs: short press (<3.36s) asserts only MROUT, while long press (≥3.36s) asserts both. In contrast, MAX6453UT29S MR affects MROUT only-RESET is triggered solely by VCC or RSTIN faults. This makes MAX6455UT29S uniquely capable of interrupt-before-reset functionality from a single button.
Does MAX6455UT29S support operation below 1.8V supply voltage?
Yes-MAX6455UT29S is fully specified from VCC = 1.0V to 5.5V. Its reset outputs remain valid and guaranteed to assert correctly down to 1.0V, unlike many supervisors that fail below 1.8V. This enables robust brownout detection in low-voltage battery systems and extends safe operating range during power ramp-down.
What is the purpose of the RSTIN pin on MAX6455UT29S?
The RSTIN pin on MAX6455UT29S connects to a high-impedance (±25nA) comparator referenced to 0.630V, allowing monitoring of secondary supplies (e.g., 1.2V, 1.5V, 1.8V) via an external resistor divider. It enables true dual-voltage supervision-VCC for primary rail, RSTIN for auxiliary rail-without additional ICs or complex circuitry.
Is MAX6455UT29S pin-compatible with other devices in the MAX6453–MAX6456 family?
Yes-MAX6455UT29S shares identical SOT23-6 pinout and footprint with all MAX6453–MAX6456 variants, including MAX6453UT29S, MAX6454UT29S, and MAX6456UT29S. Pin functions (RESET, GND, MROUT, VCC, RSTIN, MR) are consistent across the family, enabling drop-in replacement where functional requirements align.
MAX6455UT29S 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:
- 2.925V, 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
MAX6455UT29S FAQ
1.How can I place an order for MAX6455UT29S through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6455UT29S 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 MAX6455UT29S reliable?
The price and inventory of MAX6455UT29S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6455UT29S is usually 5 days.
3.What payment methods are accepted for MAX6455UT29S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6455UT29S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6455UT29S?
MAX6455UT29S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6455UT29S 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 MAX6455UT29S?
For technical support, including MAX6455UT29S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6455UT29S requirements.
6.How does Aetrix verify that MAX6455UT29S is sourced from the original manufacturer or authorized distributors?
All MAX6455UT29S 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 MAX6455UT29S meets industry standards.
7.What is the process for return or replacement of MAX6455UT29S?
All MAX6455UT29S units undergo pre-shipment inspection (PSI). If there is an issue with MAX6455UT29S, 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 MAX6455UT29S part is unused and in its original packaging.
Return procedure for MAX6455UT29S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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