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Analog Devices Inc./Maxim Integrated MAX6345TUT+T
- Part No.:
- MAX6345TUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345TUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6345TUT+T from Maxim Integrated is a dual-output microprocessor supervisory circuit in SOT23-6 packaging, providing both active-high push-pull RESET and active-low push-pull RESET outputs with factory-trimmed 3.08V VCC reset threshold, +1.25V power-fail comparator input, and guaranteed reset assertion down to VCC = +1V. It monitors supply integrity in multivoltage embedded systems and enables orderly shutdown via PFO during brownout.
For engineers reviewing the MAX6345TUT+T datasheet, MAX6345TUT+T pinout, MAX6345TUT+T application, or MAX6345TUT+T equivalent, key selection criteria include dual-reset polarity support, 100ms minimum reset timeout, precision 3.08V threshold tolerance (±25mV over -40°C to +125°C), and compatibility with low-voltage operation down to 1V.
Technical Context
The MAX6345TUT+T integrates two independent reset generators: one asserting high upon VCC rise above 3.08V (RESET), the other asserting low under the same condition (RESET), both with 100–280ms timeout. Its internal +1.25V reference feeds a dedicated power-fail comparator (PFI/PFO) that operates independently of reset logic.
No manual reset (MR) input is present-unlike MAX6342–MAX6344-so MAX6345TUT+T relies solely on VCC monitoring and PFI-triggered PFO for fault detection. All functions are specified across -40°C to +125°C with supply voltage range +1.0V to +5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V ±25mV (factory-trimmed; ensures reliable µP reset at precise supply level) |
| Reset Timeout Period | 100ms min (guarantees sufficient hold time for processor initialization) | Supply Voltage Range | +1.0V to +5.5V (supports operation during deep brownout and multi-rail systems) |
| PFI Threshold | +1.25V (enables accurate power-fail warning or secondary supply monitoring) |
| Operating Temperature | -40°C to +125°C (qualified for automotive and industrial environments) |
| Package | SOT23-6 (2.9mm × 1.6mm footprint; surface-mount compatible with high-density PCBs) |
| Reset Output Types | Active-high push-pull RESET + active-low push-pull RESET (eliminates need for external pull resistors) |
Pinout & Package
MAX6345TUT+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm height), lead-free per RoHS, with moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail monitored for reset generation; accepts +1.0V to +5.5V |
| 2 - GND | Ground reference | Common return path for all internal circuits and output drivers |
| 3 - PFI | Power-fail comparator input | Monitors external voltage divider; asserts PFO when voltage falls below +1.25V |
| 4 - PFO | Power-fail comparator output | Open-drain output signaling early power degradation; used for µP interrupt or system shutdown prep |
| 5 - RESET | Active-high push-pull reset | Drives high for ≥100ms after VCC exceeds 3.08V; no external pull-up required |
| 6 - RESET | Active-low push-pull reset | Drives low for ≥100ms after VCC exceeds 3.08V; no external pull-down required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low signals eliminate level-shifting or inverter logic in mixed-signaling systems |
| Factory-trimmed 3.08V threshold | ±25mV accuracy over full temperature range avoids recalibration and improves BOM consistency |
| +1.25V precision reference | Enables accurate monitoring of secondary supplies (e.g., 3.3V, 5V rails) using simple resistor dividers |
| Guaranteed operation down to VCC = +1V | Ensures valid reset state during severe brownout-critical for fail-safe embedded control |
| 100ms minimum reset pulse width | Meets µP reset timing requirements without external RC timing components |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
Use Scenario: Battery voltage sag during transmit bursts triggers early shutdown before data corruption. IC Role / Device Role / Timing Role: Power-fail comparator (PFI/PFO) detects 3.3V rail collapse; dual RESET outputs coordinate baseband and RF processor reset sequencing. Use Value: Prevents firmware lockup by initiating controlled power-down 120ms before VCC drops below 2.93V. | Use Scenario: Hot-swap power module insertion causes transient undershoot on +5V backplane rail. IC Role / Device Role / Timing Role: Supervises +5V rail with 3.08V threshold; RESET/RESET assert synchronously to hold all line cards in reset until stable. Use Value: Eliminates spurious reboots during field maintenance-no software intervention needed. |
| Multivoltage Systems | Embedded Control Systems |
Use Scenario: Industrial PLC uses separate 3.3V I/O and 2.5V core rails; failure of either must halt execution. IC Role / Device Role / Timing Role: PFI monitors 2.5V rail via 1.25V divider; PFO interrupts µP while dual RESET outputs force hardware reset. Use Value: Enables single-chip supervision of two independent domains-reducing component count vs. discrete solutions. | Use Scenario: Automotive body controller requires fail-safe reset during cold-crank (VCC dips to 1.8V). IC Role / Device Role / Timing Role: Operates down to VCC = +1V; RESET remains valid throughout crank cycle; RESET holds peripheral ICs in reset. Use Value: Guarantees deterministic restart after engine start-no race conditions or partial initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6345TUT-T | Leaded (Pb) version; identical electrical specs and pinout | Same functionality; selected where RoHS exemption applies or legacy assembly process requires Pb | Choose MAX6345TUT-T only if leaded soldering is mandated; MAX6345TUT+T preferred for new designs. |
| TPS3808G30DBVR | Single active-low reset output; 3.0V threshold; no PFO/PFI or dual-reset capability | Lacks power-fail warning and second reset polarity-requires external logic for bidirectional reset needs | Select TPS3808G30DBVR only when dual outputs and PFI monitoring are unnecessary and cost is primary constraint. |
Compared with MAX6345TUT-T, the MAX6345TUT+T offers identical performance with lead-free compliance; versus TPS3808G30DBVR, it delivers integrated dual-reset polarity and power-fail alerting-reducing board area and enabling robust fault response in safety-critical systems.
Availability
MAX6345TUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, telecom infrastructure, and multivoltage embedded systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature operation.
Supply support for MAX6345TUT+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 and mixed-signal ICs for industrial, automotive, communications, and computing applications.
The MAX6342–MAX6345 family targets high-reliability power supervision in space-constrained systems-delivering factory-trimmed thresholds, dual-reset flexibility, and power-fail warning in minimal SOT23-6 footprint.
FAQ
What is the exact reset threshold voltage of the MAX6345TUT+T?
The MAX6345TUT+T has a factory-trimmed VCC reset threshold of 3.08V, with tolerance of ±25mV over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The 'T' suffix in MAX6345TUT+T explicitly denotes the 3.08V variant per Maxim's selector guide. All electrical behavior-including RESET and RESET timing-is referenced to this precise threshold.
Does the MAX6345TUT+T include a manual reset (MR) input?
No, the MAX6345TUT+T does not include a manual reset (MR) input. Unlike MAX6342–MAX6344 variants, MAX6345 replaces the MR pin with a second reset output (RESET). Its reset assertion is triggered exclusively by VCC crossing the 3.08V threshold or by PFI-driven PFO activation. This design simplifies board layout in applications where pushbutton-initiated reset is unnecessary and dual-polarity reset signaling is prioritized.
How does the power-fail comparator function in the MAX6345TUT+T?
The MAX6345TUT+T incorporates an independent power-fail comparator with a fixed +1.25V internal reference connected to the PFI pin. When voltage at PFI falls below +1.25V-typically set via an external resistor divider monitoring a secondary supply-the PFO output goes low. PFO is open-drain and can interface directly with µP interrupt inputs or be wired to trigger auxiliary reset logic. This function operates fully decoupled from the main VCC reset generator.
What are the drive capabilities of the RESET and RESET outputs on the MAX6345TUT+T?
The RESET (active-high) and RESET (active-low) outputs of the MAX6345TUT+T are push-pull and rated for 500µA source/sink current respectively at VCC > 2.7V. RESET guarantees VOH ≥ 0.8×VCC with 500µA load; RESET guarantees VOL ≤ 0.4V with 1.2mA sink. Neither requires external pull resistors, enabling direct connection to µP reset pins or logic interfaces without additional components.
Is the MAX6345TUT+T qualified for automotive applications?
Yes, the MAX6345TUT+T is specified for operation from -40°C to +125°C and is commonly deployed in automotive body control modules and infotainment power supervisors. While not AEC-Q200 certified out-of-box, its extended temperature rating, guaranteed reset validity down to VCC = +1V, and robust transient immunity (per Figure 4 in datasheet) align with automotive cold-crank and load-dump stress requirements. System-level qualification remains the responsibility of the end designer.
MAX6345TUT+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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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-6
MAX6345TUT+T FAQ
1.How can I place an order for MAX6345TUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345TUT+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 MAX6345TUT+T reliable?
The price and inventory of MAX6345TUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345TUT+T is usually 5 days.
3.What payment methods are accepted for MAX6345TUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345TUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345TUT+T?
MAX6345TUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345TUT+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 MAX6345TUT+T?
For technical support, including MAX6345TUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345TUT+T requirements.
6.How does Aetrix verify that MAX6345TUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6345TUT+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 MAX6345TUT+T meets industry standards.
7.What is the process for return or replacement of MAX6345TUT+T?
All MAX6345TUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345TUT+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 MAX6345TUT+T part is unused and in its original packaging.
Return procedure for MAX6345TUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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