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Analog Devices Inc./Maxim Integrated MAX6351LTUT+T
- Part No.:
- MAX6351LTUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6351LTUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
The MAX6351LTUT+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with two active-low push-pull reset outputs-RST1 referenced to VCC1 and RST2 referenced to VCC2-designed for multivoltage systems requiring precise, independent monitoring of +4.63V (VTH1) and +3.08V (VTH2) supply rails. It guarantees valid RESET output down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, features 20µA supply current, 100ms minimum power-on-reset pulse width, and operates across –40°C to +85°C in a 6-pin SOT23 package.
For engineers reviewing the MAX6351LTUT+T datasheet, MAX6351LTUT+T pinout, MAX6351LTUT+T application, or MAX6351LTUT+T equivalent, this page delivers verified functional identity, exact threshold voltages, dual-supply reset behavior, temperature-stable reset timing, and real-world interface guidance for embedded controllers and multivoltage instrumentation.
Technical Context
The MAX6351LTUT+T implements dual independent voltage comparators with factory-trimmed thresholds (4.63V ±0.09V on VCC1, 3.08V ±0.05V on VCC2), each with 20ppm/°C tempco and 500mV hysteresis. Its reset generator asserts both RST1 and RST2 simultaneously when either supply drops below its trip point, and maintains valid logic states as long as at least one supply remains ≥1.0V.
It includes a debounced TTL/CMOS-compatible manual-reset input (MR) with 1µs minimum pulse width and <100ns glitch rejection, and supports system-level reliability via power-supply transient immunity up to 250µs at 100mV overdrive-no external components required for dual-rail supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±0.09V at +25°C; ensures reliable reset assertion when primary 4.63V rail drops below specification |
| VCC2 Threshold | 3.08V ±0.05V at +25°C; enables accurate supervision of secondary 3.08V domain (e.g., I/O or analog supply) |
| Reset Timeout Period | 100–280ms; guarantees minimum 100ms active-low reset pulse for safe µP initialization |
| Supply Current | 20µA typical; enables low-power operation in battery-backed or energy-sensitive systems |
| Operating Temperature | –40°C to +85°C; fully specified for industrial and extended-temperature embedded applications |
| RESET Output Type | Two active-low push-pull outputs (RST1@VCC1, RST2@VCC2); eliminates need for external pull-ups and supports direct µP reset pin drive |
| Reset Validity Range | Valid down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; ensures deterministic reset behavior during brownout conditions |
Pinout & Package
MAX6351LTUT+T is housed in a lead(Pb)-free 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST1 | Active-low push-pull reset output referenced to VCC1; drives µP reset pin directly without external pull-up |
| 2 | GND | System ground reference for all internal comparators and logic |
| 3 | MR | Debounced manual-reset input; asserted low forces simultaneous RST1/RST2 activation for system recovery |
| 4 | VCC2 | Secondary supply input and monitored rail; powers device when > VCC1 and triggers RST2 if <3.08V |
| 5 | RST2 | Active-low push-pull reset output referenced to VCC2; enables independent reset signaling for VCC2-dependent subsystems |
| 6 | VCC1 | Primary supply input and monitored rail; powers device when > VCC2 and triggers RST1 if <4.63V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of two distinct supply domains (e.g., core + I/O) with no shared threshold dependency |
| Push-pull RST outputs | Eliminates external pull-up resistors and reduces BOM count while ensuring fast, rail-referenced logic transitions |
| Guaranteed reset validity to 1.0V | Enables robust brownout detection and controlled shutdown even during deep undervoltage events |
| 20ppm/°C threshold tempco | Maintains ±0.5% threshold accuracy over full –40°C to +85°C range without calibration |
| Power-supply transient immunity | Rejects transients ≤250µs duration at 100mV overdrive, preventing false resets in noisy environments |
Applications
| Industrial Controllers | Portable Medical Instruments |
|---|---|
Use Scenario: PLC I/O modules with separate 4.63V CPU core and 3.08V analog sensor interface supplies. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to both processor and ADC/DAC subsystems upon any rail fault. Use Value: Prevents metastability and latch-up by guaranteeing simultaneous, rail-specific reset assertion with 100ms minimum pulse width. | Use Scenario: Battery-powered handheld ECG monitor with 4.63V microcontroller supply and 3.08V precision analog front-end. IC Role / Device Role / Timing Role: Low-current (20µA) supervisor maintaining valid reset state down to 1.0V per rail during battery depletion. Use Value: Ensures safe shutdown before analog signal corruption occurs, extending usable battery life without compromising safety integrity. |
| Multivoltage Test Equipment | Intelligent Power Meters |
Use Scenario: Automated test fixture supplying 4.63V to DUT controller and 3.08V to calibration reference IC. IC Role / Device Role / Timing Role: Independent threshold monitoring with push-pull outputs driving separate reset lines to DUT and reference subsystems. Use Value: Enables fault-isolation diagnostics-e.g., distinguishing between controller supply failure vs. reference supply failure based on RST1/RST2 status. | Use Scenario: Smart electricity meter with isolated 4.63V MCU domain and 3.08V metrology ADC supply. IC Role / Device Role / Timing Role: Supervisory circuit ensuring deterministic reset coordination between isolated domains during AC line dropout. Use Value: Guarantees atomic reset sequencing across isolation barriers, preventing data corruption in nonvolatile energy registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353LTUK+T | Single active-low push-pull RST output referenced to VCC1 only; no RST2; 5-pin SOT23 package | Suitable for systems needing only primary-rail reset; lacks independent secondary-rail supervision | Select when only VCC1 monitoring is required and board space is constrained |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); open-drain RST; requires external pull-up; no dual-rail capability | Applicable only for single-rail systems; cannot replace dual-threshold functionality of MAX6351LTUT+T | Choose only for cost-sensitive, single-voltage designs where dual monitoring is unnecessary |
Compared with MAX6353LTUK+T and TPS3808G33DBVR, the MAX6351LTUT+T uniquely provides two rail-referenced push-pull reset outputs with independent 4.63V/3.08V thresholds-enabling true multivoltage fault isolation and eliminating external components required by open-drain alternatives.
Availability
MAX6351LTUT+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical instruments, multivoltage test equipment, and intelligent power meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6351LTUT+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage embedded systems requiring precise, independent supervision of two or three supply rails with minimal external components and guaranteed operation down to 1.0V.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6351LTUT+T?
The MAX6351LTUT+T has a factory-trimmed VCC1 threshold of 4.63V ±0.09V (min 4.54V, max 4.72V at +25°C) and a VCC2 threshold of 3.08V ±0.05V (min 3.03V, max 3.14V at +25°C). These values are guaranteed over –40°C to +85°C with 20ppm/°C tempco and include 500mV hysteresis to prevent chatter during slow supply ramps.
Does the MAX6351LTUT+T support watchdog timer functionality?
No, the MAX6351LTUT+T does not include a watchdog timer. Watchdog capability is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6351LTUT+T provides only dual-voltage monitoring and reset generation via RST1 and RST2 outputs.
Can the MAX6351LTUT+T operate with supply voltages below 1.2V?
The MAX6351LTUT+T guarantees valid reset output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, but its specified operating range begins at VCC1/VCC2 = 1.2V (min) per datasheet Electrical Characteristics. Operation below 1.2V is not characterized or guaranteed-designs requiring sub-1.2V supervision should verify functionality empirically or select alternate devices.
What is the function of Pin 5 (RST2) on the MAX6351LTUT+T?
Pin 5 on the MAX6351LTUT+T is RST2-an active-low, push-pull reset output referenced to VCC2. It asserts low whenever VCC2 drops below its 3.08V threshold, enabling direct drive of reset pins on subsystems powered by the VCC2 rail without external pull-up components.
Is the MAX6351LTUT+T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6351LTUT+T shares the same 6-pin SOT23 (U6-1) package and pinout with MAX6355/MAX6356/MAX6357/MAX6358/MAX6359/MAX6360, but functional compatibility depends on variant: only MAX6351 devices provide dual push-pull RST outputs; others offer open-drain, single-output, or watchdog-enabled configurations. Always verify RST topology and feature set before substitution.
MAX6351LTUT+T 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:
- 3.08V, 4.63V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6351LTUT+T FAQ
1.How can I place an order for MAX6351LTUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6351LTUT+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 MAX6351LTUT+T reliable?
The price and inventory of MAX6351LTUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6351LTUT+T is usually 5 days.
3.What payment methods are accepted for MAX6351LTUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6351LTUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6351LTUT+T?
MAX6351LTUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6351LTUT+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 MAX6351LTUT+T?
For technical support, including MAX6351LTUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6351LTUT+T requirements.
6.How does Aetrix verify that MAX6351LTUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6351LTUT+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 MAX6351LTUT+T meets industry standards.
7.What is the process for return or replacement of MAX6351LTUT+T?
All MAX6351LTUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6351LTUT+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 MAX6351LTUT+T part is unused and in its original packaging.
Return procedure for MAX6351LTUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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