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Analog Devices Inc./Maxim Integrated MAX6345ZUT+
- Part No.:
- MAX6345ZUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345ZUT+.pdf
- Description:
- MAX6345 6-PIN MICROPROCESSOR RES
- Quantity:
- Payment:
- Shipping:
Inventory:12,815
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Product details
Overview
MAX6345ZUT+ from Maxim Integrated is a precision 6-pin SOT23 microprocessor supervisory circuit with dual active-high and active-low push-pull reset outputs, factory-trimmed 2.33V VCC reset threshold, +1.25V power-fail comparator input, and guaranteed RESET validity down to VCC = +1V. It monitors supply integrity in multivoltage embedded systems and provides early power-fail warning for orderly shutdown.
For engineers reviewing the MAX6345ZUT+ datasheet, MAX6345ZUT+ pinout, MAX6345ZUT+ application, or MAX6345ZUT+ equivalent, this device delivers deterministic reset timing, dual-output flexibility for bidirectional µP interfaces, and robust immunity to VCC transients - critical for portable, telecom, and industrial control designs requiring high-reliability power sequencing.
Technical Context
The MAX6345ZUT+ integrates two independent reset generators: one asserting an active-high push-pull RESET output and another asserting an active-low push-pull RESET output, both with minimum 100ms timeout (180ms typical) after VCC rise or MR deassertion. Its internal +1.25V reference drives a dedicated PFI comparator whose output (PFO) is electrically isolated from reset logic.
It operates across full industrial temperature range (–40°C to +125°C), supports supply voltages from +1.0V to +5.5V, and guarantees valid logic-level outputs even as VCC drops to +1V - enabling reliable brownout detection without external support circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.33V ±25mV (factory-trimmed, ensures precise brownout detection at low-voltage rails) |
| Power-Fail Input Threshold | +1.25V (enables monitoring of secondary supplies via resistor divider) |
| Reset Timeout Period | 100ms min (guaranteed minimum pulse width prevents spurious µP startup) |
| Supply Voltage Range | +1.0V to +5.5V (supports operation during deep brownout and wide-input systems) |
| Operating Temperature | –40°C to +125°C (qualified for automotive under-hood and industrial edge environments) |
| Output Drive | Push-pull RESET and RESET (no external pull-up required; sinks 1.2mA / sources 500µA minimum) |
| Supply Current | 25µA typical at +3V (ultra-low quiescent current for battery-backed applications) |
Pinout & Package
Package: 6-pin SOT23-6 (1.6mm × 2.9mm × 1.1mm), surface-mount, lead-free (RoHS-compliant), top-mark "AAEB".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail input; device functions down to +1.0V with valid reset assertion |
| 2 - GND | Ground reference | Common return path for all internal circuits and output drivers |
| 3 - PFI | Power-fail monitor input | Compares external voltage against internal +1.25V reference; asserts PFO when <1.25V |
| 4 - PFO | Power-fail comparator output | Open-drain output signaling early power degradation; used for µP interrupt or MR triggering |
| 5 - RESET | Active-high push-pull reset output | Drives high after timeout; directly interfaces µP reset pins requiring active-high assertion |
| 6 - RESET | Active-low push-pull reset output | Drives low after timeout; compatible with standard µP reset inputs without pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low push-pull signals eliminate need for external inverters or level shifters in bidirectional µP reset architectures |
| Factory-trimmed 2.33V threshold | ±25mV accuracy over –40°C to +125°C enables reliable reset at ultra-low VCC without calibration |
| +1.25V precision reference | Stable internal reference allows accurate monitoring of auxiliary supplies (e.g., +3.3V, +2.5V, or negative rails via external circuitry) |
| Guaranteed operation to VCC = +1V | Ensures deterministic reset behavior during severe brownout - no external undervoltage lockout needed |
| 100ms minimum reset pulse width | Meets JEDEC JESD78 requirements for µP initialization stability; prevents premature code execution |
Applications
| Portable/Battery-Powered Equipment | Telecom Line Cards |
|---|---|
Use Scenario: Battery voltage decays during discharge; system must detect imminent cutoff and initiate safe shutdown before data loss. IC Role / Device Role / Timing Role: Supervisory circuit monitoring main VCC and generating dual-reset signals to halt processor and trigger backup storage. Use Value: Factory-trimmed 2.33V threshold aligns precisely with Li-ion end-of-discharge voltage; 25µA supply current extends battery life. |
Use Scenario: Hot-swap power modules introduce transient dips on +3.3V and +5V rails during insertion/removal. IC Role / Device Role / Timing Role: Dual-reset generator asserting both active-high and active-low signals to coordinate FPGA configuration and DSP reset sequencing. Use Value: Immunity to ≤12µs/100mV VCC glitches prevents false resets; –40°C to +125°C rating supports chassis-edge deployment. |
| Multivoltage Embedded Systems | Industrial PLC Controllers |
Use Scenario: System uses separate +1.8V core, +3.3V I/O, and +5V analog rails; failure of any rail must trigger full-system reset. IC Role / Device Role / Timing Role: Primary VCC supervisor with PFI connected to +3.3V rail via resistor divider to extend monitoring coverage. Use Value: +1.25V reference enables accurate threshold derivation (e.g., 3.3V × 1.25/2.2 = 1.875V trip point); dual outputs drive mixed-signaling µPs. |
Use Scenario: Harsh factory-floor environment with EMI-induced supply noise and wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability reset source ensuring µP restarts only after stable power is confirmed across full operating range. Use Value: Guaranteed operation to VCC = +1V and 100ms min timeout prevent latch-up during noisy brownouts; SOT23-6 footprint minimizes PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342ZUT+ | Single active-low push-pull reset output; includes MR input; no active-high RESET output | Suitable where only one reset polarity is needed and manual reset is required | Select MAX6342ZUT+ if design uses only active-low µP reset and requires MR functionality - saves cost and board space |
| TPS3808G12DBVR | Single open-drain active-low reset; adjustable threshold via external resistor; no PFI/PFO function | Lacks dual-output capability and dedicated power-fail comparator; requires external components for multi-rail monitoring | Choose TPS3808G12DBVR only for simple single-rail systems where PFI functionality and dual reset are unnecessary |
Compared with MAX6342ZUT+, the MAX6345ZUT+ adds an active-high reset output at no penalty in size or quiescent current - essential for interfacing with modern µPs featuring bidirectional reset I/O. Versus TPS3808G12DBVR, it delivers integrated power-fail warning and tighter factory-trimmed threshold accuracy without external components.
Availability
MAX6345ZUT+ is available at Aetrix Electronics and suitable for portable computers, telecom equipment, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6345ZUT+ 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 engineered specifically for high-reliability microprocessor supervision in multivoltage, battery-sensitive, and thermally harsh environments - emphasizing accuracy, low power, and functional integration in minimal footprint.
FAQ
What is the exact reset threshold voltage for MAX6345ZUT+?
The MAX6345ZUT+ has a factory-trimmed VCC reset threshold of 2.33V, with guaranteed tolerance of ±25mV over the full –40°C to +125°C temperature range. This value is laser-trimmed during production and documented in Maxim's official datasheet revision 2 (12/05), Selector Guide 2, and confirmed by SOT top-mark "AAEB" correlation.
Does MAX6345ZUT+ support operation below 2.7V supply voltage?
Yes, MAX6345ZUT+ operates across +1.0V to +5.5V supply range and guarantees valid RESET and RESET logic levels down to VCC = +1V. Its internal bandgap reference and reset comparator remain functional at sub-2.7V rails, making it suitable for low-voltage microcontrollers and battery-depleted conditions.
How does the PFI/PFO function work in MAX6345ZUT+?
In MAX6345ZUT+, the PFI pin connects to an internal +1.25V comparator reference. When voltage at PFI falls below +1.25V, the open-drain PFO output pulls low - enabling early-warning detection of power degradation on secondary rails. PFO is fully independent of reset outputs and can be tied to MR for cascaded reset triggering.
What is the reset timeout duration for MAX6345ZUT+?
The MAX6345ZUT+ guarantees a minimum reset timeout period (tRP) of 100ms after VCC rises above the 2.33V threshold or after MR deassertion. Typical duration is 180ms, and maximum is 280ms over –40°C to +125°C - satisfying JEDEC JESD78 requirements for robust µP initialization.
Is MAX6345ZUT+ pin-compatible with other devices in the MAX6342–MAX6345 family?
Yes, MAX6345ZUT+ shares identical 6-pin SOT23-6 package, pinout, and footprint with MAX6342ZUT+, MAX6343ZUT+, and MAX6344ZUT+. All variants use pins 1–6 for VCC, GND, PFI, PFO, RESET, and RESET respectively - enabling drop-in replacement where dual-reset functionality is acceptable.
MAX6345ZUT+ 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:
- 2.33V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/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
MAX6345ZUT+ FAQ
1.How can I place an order for MAX6345ZUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345ZUT+ 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 MAX6345ZUT+ reliable?
The price and inventory of MAX6345ZUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345ZUT+ is usually 5 days.
3.What payment methods are accepted for MAX6345ZUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345ZUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345ZUT+?
MAX6345ZUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345ZUT+ 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 MAX6345ZUT+?
For technical support, including MAX6345ZUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345ZUT+ requirements.
6.How does Aetrix verify that MAX6345ZUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6345ZUT+ 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 MAX6345ZUT+ meets industry standards.
7.What is the process for return or replacement of MAX6345ZUT+?
All MAX6345ZUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345ZUT+, 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 MAX6345ZUT+ part is unused and in its original packaging.
Return procedure for MAX6345ZUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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