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Analog Devices Inc./Maxim Integrated MAX6345MUT-T
- Part No.:
- MAX6345MUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345MUT-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6345MUT-T from Maxim Integrated is a dual-output microprocessor supervisory circuit in SOT23-6 package, providing both active-high push-pull RESET and active-low push-pull RESET outputs with factory-trimmed 4.38V VCC reset threshold, guaranteed operation down to VCC = +1V, 100ms minimum reset timeout, and integrated +1.25V power-fail comparator for low-battery or auxiliary supply monitoring in portable and multivoltage systems.
For engineers reviewing the MAX6345MUT-T datasheet, MAX6345MUT-T pinout, MAX6345MUT-T application, or MAX6345MUT-T equivalent, this device is selected for designs requiring dual independent reset polarity control, precise brownout detection at 4.38V ±2.5%, robust manual reset debouncing, and fail-safe voltage monitoring without external references.
Technical Context
The MAX6345MUT-T integrates two independent reset generators: one asserting active-high RESET on VCC rise above 4.38V or MR release, the other asserting active-low RESET under identical conditions-both with 100–280ms timeout and valid output down to VCC = +1V. Its dedicated PFI input connects to an internal +1.25V reference, enabling accurate power-fail or secondary supply monitoring via external resistor dividers.
No manual-reset input (MR) is present-replaced by the second reset output-making it functionally distinct from MAX6342/MAX6343/MAX6344. All logic thresholds are CMOS-compatible, and output drive strength meets 500µA source/1.2mA sink specifications across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.38V ±2.5% (factory-trimmed; ensures reliable brownout detection at nominal 4.38V supply level) |
| Reset Timeout Period | 100ms min / 280ms max (guaranteed assertion duration prevents premature µP release during unstable power-up) |
| Supply Voltage Range | +1.0V to +5.5V (enables operation in ultra-low-voltage systems and compatibility with 1.8V/3.3V/5V rails) |
| PFO Input Threshold | +1.25V ±100mV (fixed internal reference enables accurate power-fail or battery-low warning without external components) |
| Output Drive Strength | VOH ≥ 0.8×VCC @ 500µA source; VOL ≤ 0.4V @ 1.2mA sink (ensures clean logic levels into typical µP reset inputs and bus loads) |
| Operating Temperature | –40°C to +125°C (qualified for automotive under-hood, industrial control, and extended-range embedded applications) |
| Supply Current | 25µA typ @ VCC = 3V, TA = +25°C (ultra-low quiescent current extends battery life in portable equipment) |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free compatible (marked "AADX" per Maxim top-mark table).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Power rail connection; device operates from +1.0V to +5.5V; reset asserts when VCC falls below 4.38V |
| 2 - GND | Ground reference | System ground return; required for all internal comparators and output drivers |
| 3 - PFI | Power-fail input | Monitors external voltage via resistor divider; asserts PFO low when PFI < +1.25V (e.g., battery drop or supply sag) |
| 4 - PFO | Power-fail output | Active-low open-drain output; signals early power failure or low-battery condition; requires external pull-up |
| 5 - RESET | Active-high push-pull reset | Drives high for ≥100ms after VCC > 4.38V or MR event; directly interfaces µP reset pins needing active-high assertion |
| 6 - RESET | Active-low push-pull reset | Drives low for ≥100ms after VCC > 4.38V or MR event; compatible with standard µP active-low reset inputs |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low push-pull RESET signals eliminate need for external inverters or level shifters |
| Factory-trimmed 4.38V threshold | ±2.5% accuracy over temperature avoids calibration overhead and supports tight 4.5V system margins |
| +1.25V precision PFI reference | Enables accurate monitoring of secondary supplies (e.g., 3.3V, 2.5V, or battery) using only two external resistors |
| Guaranteed reset validity to VCC = +1V | Ensures deterministic reset behavior during deep brownout or battery depletion, critical for data retention safety |
| 100ms minimum reset pulse width | Meets µP minimum reset hold-time requirements across full temperature and voltage range without external timing components |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
|
Use Scenario: Smart meter with lithium-thionyl chloride battery operating down to 2.5V, requiring graceful shutdown before voltage collapse. IC Role / Device Role / Timing Role: MAX6345MUT-T monitors main 3.3V rail and battery voltage via PFI divider; asserts dual RESET to halt MCU and trigger EEPROM save before brownout. Use Value: Prevents data corruption by guaranteeing ≥100ms reset hold time even as VCC drops to +1V, while PFO provides 200ms advance warning of battery depletion. |
Use Scenario: Line card in carrier-grade switch with dual 3.3V/1.2V supplies and hot-swap capability. IC Role / Device Role / Timing Role: MAX6345MUT-T supervises primary 3.3V rail (4.38V threshold) and uses PFI to monitor 1.2V core supply; RESET outputs coordinate FPGA and PHY initialization. Use Value: Dual reset polarity eliminates need for discrete inverters, reducing BOM count; PFO enables predictive fault logging prior to supply dropout. |
| Multivoltage Systems | Embedded Control Systems |
|
Use Scenario: Industrial PLC with mixed 5V, 3.3V, and 2.5V domains powered from single DC-DC converter. IC Role / Device Role / Timing Role: MAX6345MUT-T resets 5V µP domain (via active-low RESET) and 3.3V FPGA domain (via active-high RESET), synchronized to same VCC threshold event. Use Value: Single IC replaces two discrete supervisors, saving PCB area and ensuring simultaneous, correlated reset assertion across voltage domains. |
Use Scenario: Automotive body controller with CAN interface, requiring ASIL-B–compatible power sequencing and fail-safe shutdown. IC Role / Device Role / Timing Role: MAX6345MUT-T provides redundant reset signaling (active-high and active-low) to separate safety monitor and main MCU, with PFO feeding diagnostic interrupt. Use Value: Dual outputs support functional safety architectures requiring diverse reset paths; –40°C to +125°C rating ensures reliability in under-dash environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6344MUT-T | Single active-high push-pull RESET output; includes MR input instead of second RESET; same 4.38V threshold and PFI/PFO functionality | Requires external manual reset switch; lacks dual-reset capability for independent domain control | Select when manual reset initiation is needed and only one reset polarity is required |
| TLV809M33DBZR | Single active-low reset output; 3.3V threshold; no PFI/PFO comparator; SOT23-3 package; lower quiescent current (0.5µA) | Cannot monitor secondary supplies or provide early power-fail warning; limited to basic VCC supervision | Select for cost-sensitive, single-rail applications where auxiliary monitoring is unnecessary |
Compared with MAX6344MUT-T, MAX6345MUT-T trades manual reset capability for dual-output flexibility-critical for systems needing coordinated but polarity-diverse reset signaling. Against TLV809M33DBZR, it adds PFI-based monitoring and higher threshold accuracy at the cost of higher supply current and larger package.
Availability
MAX6345MUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, telecom equipment, multivoltage systems, and embedded control systems requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6345MUT-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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX6342–MAX6345 family was developed specifically for high-reliability microprocessor supervision in space-constrained, wide-temperature, and multivoltage environments-emphasizing accuracy, dual-output flexibility, and integrated power-fail detection.
FAQ
What is the exact reset threshold voltage of the MAX6345MUT-T?
The MAX6345MUT-T has a factory-trimmed VCC reset threshold of 4.38V, with ±2.5% tolerance over the full –40°C to +125°C temperature range. This value is confirmed in Maxim's Selector Guide 2 and Electrical Characteristics table, and corresponds to the "M" suffix in the part number. The MAX6345MUT-T does not require external calibration to achieve this accuracy.
Does the MAX6345MUT-T include a manual-reset (MR) input?
No, the MAX6345MUT-T does not include a manual-reset (MR) input. Per the Pin Description and Selector Guide, the MR pin is replaced by the second RESET output to enable dual active-high and active-low reset signaling. This distinguishes MAX6345MUT-T from MAX6342/MAX6343/MAX6344 variants, which retain MR but offer only one reset output.
How does the PFI/PFO function work in the MAX6345MUT-T?
The MAX6345MUT-T uses an internal +1.25V reference connected to the PFI pin. When the voltage applied to PFI falls below +1.25V, the PFO output goes low-providing early warning of power failure or low battery. For example, connecting a resistor divider from a 3.3V rail to PFI sets trip point at ~2.7V. PFO is open-drain and requires an external pull-up resistor.
What are the drive capabilities of the two RESET outputs on the MAX6345MUT-T?
The MAX6345MUT-T provides two push-pull RESET outputs: RESET (pin 5) is active-high, RESET (pin 6) is active-low. Both deliver VOH ≥ 0.8×VCC at 500µA source current and VOL ≤ 0.4V at 1.2mA sink current across –40°C to +125°C. This ensures direct interfacing with standard µP reset inputs without external buffers.
Is the MAX6345MUT-T qualified for automotive applications?
Yes, the MAX6345MUT-T is specified for operation from –40°C to +125°C and packaged in a qualified SOT23-6 footprint. While not AEC-Q200 certified out-of-box, its temperature rating, supply range (+1.0V to +5.5V), and reset validity down to VCC = +1V align with common automotive body electronics requirements. System-level qualification may be required per OEM specification.
MAX6345MUT-T 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6345MUT-T FAQ
1.How can I place an order for MAX6345MUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345MUT-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 MAX6345MUT-T reliable?
The price and inventory of MAX6345MUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345MUT-T is usually 5 days.
3.What payment methods are accepted for MAX6345MUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345MUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345MUT-T?
MAX6345MUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345MUT-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 MAX6345MUT-T?
For technical support, including MAX6345MUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345MUT-T requirements.
6.How does Aetrix verify that MAX6345MUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6345MUT-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 MAX6345MUT-T meets industry standards.
7.What is the process for return or replacement of MAX6345MUT-T?
All MAX6345MUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345MUT-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 MAX6345MUT-T part is unused and in its original packaging.
Return procedure for MAX6345MUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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