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Analog Devices Inc./Maxim Integrated MAX6345ZUT+T
- Part No.:
- MAX6345ZUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345ZUT+T.pdf
- Description:
- IC RESET MPU W/COMP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,695
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Product details
Overview
MAX6345ZUT+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 2.33V VCC reset threshold, guaranteed operation down to VCC = +1V, and integrated power-fail comparator (PFI/PFO) for low-battery or auxiliary supply monitoring in portable and multivoltage systems.
For engineers reviewing the MAX6345ZUT+T datasheet, MAX6345ZUT+T pinout, MAX6345ZUT+T application, or MAX6345ZUT+T equivalent, key selection criteria include dual-reset polarity support, 2.33V precision threshold, 100ms minimum reset timeout, PFI comparator with 1.25V reference, and SOT23-6 footprint compatibility for space-constrained embedded control designs.
Technical Context
The MAX6345ZUT+T implements a precision bandgap-based voltage monitor with two independent reset generators: one asserting high upon VCC rise above 2.33V (±25mV over temperature), the other asserting low under the same condition - both with 100–280ms timeout. Its PFI input compares external voltage against an internal 1.25V reference, driving PFO low when PFI falls below that threshold.
This architecture enables simultaneous system reset coordination and early-warning power-fail signaling without shared timing dependencies. The device operates across full industrial temperature range (−40°C to +125°C) and supports supply voltages from +1.0V to +5.5V, with guaranteed reset validity even as VCC decays to +1V - critical for brownout recovery in battery-powered equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.33V ±25mV (−40°C to +125°C); ensures reliable reset assertion during 2.5V/3.3V rail brownout |
| Reset Timeout Period | 100–280ms; guarantees µP initialization window meets JEDEC JESD78 requirements | Supply Voltage Range | +1.0V to +5.5V; supports operation during deep brownout and multi-rail sequencing |
| PFI Threshold | 1.25V ±100mV; enables accurate low-battery detection or secondary supply monitoring |
| RESET Output Drive | Push-pull, active-high & active-low; eliminates need for external pull-up/pull-down resistors |
| Quiescent Current | 25µA (typ) at VCC = 3V; extends battery life in always-on portable applications |
| Operating Temperature | −40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6345ZUT+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free, RoHS-compliant, with thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Primary supply input | Power source for internal comparators and reset generators; must be decoupled near pin |
| 2 - GND | Ground reference | Analog and digital ground return; connects to system ground plane for noise immunity |
| 3 - PFI | Power-fail input | Monitors external voltage via resistor divider; asserts PFO when <1.25V |
| 4 - PFO | Power-fail output | Active-low open-drain signal indicating auxiliary supply failure or low-battery condition |
| 5 - RESET | Active-high push-pull reset | Drives high for ≥100ms after VCC exceeds 2.33V; directly interfaces µP reset pins requiring active-high assertion |
| 6 - RESET | Active-low push-pull reset | Drives low for ≥100ms after VCC exceeds 2.33V; compatible with standard µP reset inputs |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low signals eliminate level-shifting or logic inversion in mixed-logic systems |
| Factory-trimmed 2.33V threshold | Eliminates external resistor calibration; reduces BOM count and improves production yield |
| Guaranteed reset validity to VCC = +1V | Ensures deterministic reset behavior during deep brownout, enabling safe state retention |
| Integrated 1.25V PFI comparator | Enables autonomous low-battery warning or secondary supply monitoring without additional ICs |
| 100ms minimum reset pulse width | Meets µP reset timing requirements per Intel/ARM specifications for reliable boot initialization |
Applications
| Battery-Powered Portable Devices | Multivoltage Embedded Systems |
|---|---|
Use Scenario: Smart meter with Li-ion backup battery and dual 3.3V/1.8V rails. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers orderly shutdown when battery voltage drops below 3.0V via PFI divider. Use Value: Prevents data corruption during power transition using dual-reset outputs to hold µP and memory in reset while backup activates. | Use Scenario: Industrial PLC with isolated 5V, 3.3V, and 2.5V domains. IC Role / Device Role / Timing Role: Monitors 3.3V domain with 2.33V threshold and uses PFO to flag 5V regulator degradation before it affects logic. Use Value: Enables predictive maintenance by detecting upstream supply drift before system-level failure occurs. |
| Telecom Line Cards | Automotive Infotainment Modules |
Use Scenario: Hot-swappable Ethernet line card with 12V-to-3.3V DC/DC and FPGA. IC Role / Device Role / Timing Role: Provides synchronized active-high reset to FPGA configuration logic and active-low reset to PHY transceivers. Use Value: Eliminates race conditions during hot-insertion by guaranteeing both logic families enter known state simultaneously. | Use Scenario: Head unit with 5V MCU, 3.3V display driver, and 1.2V DDR interface. IC Role / Device Role / Timing Role: Uses PFI to monitor 5V rail and assert dual resets only when all supplies are stable above thresholds. Use Value: Meets AEC-Q100 Grade 2 thermal requirements while supporting cold-cranking voltage dips down to 6V battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342ZUT+T | Single active-low push-pull RESET output; includes MR input; no active-high RESET | Suitable where only one reset polarity is needed and manual reset is required | Select when board layout lacks space for dual-reset routing or system design uses external logic for polarity inversion |
| TPS3808G33DBVR | Single active-low open-drain RESET; 3.3V fixed threshold; no PFI/PFO function | Lacks power-fail monitoring and dual-output capability; requires external pull-up | Choose only if 3.3V threshold suffices and auxiliary supply monitoring is handled elsewhere |
Compared with MAX6342ZUT+T and TPS3808G33DBVR, the MAX6345ZUT+T uniquely delivers concurrent active-high/active-low reset signaling plus integrated PFI monitoring - reducing component count and PCB area in systems requiring coordinated reset and early power-fail response.
Availability
MAX6345ZUT+T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, networking gear, and automotive infotainment modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6345ZUT+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 industrial, automotive, communications, and computing applications.
The MAX6342–MAX6345 family targets space-constrained, battery-sensitive systems needing reliable power supervision with minimal external components - especially where dual-reset polarity and auxiliary supply monitoring are essential.
FAQ
What is the exact reset threshold voltage for MAX6345ZUT+T?
The MAX6345ZUT+T has a factory-trimmed VCC reset threshold of 2.33V, with tolerance of ±25mV over the full operating temperature range (−40°C to +125°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table of the MAX6345ZUT+T datasheet. The 'Z' suffix explicitly denotes the 2.33V variant within the MAX6345 family.
Does MAX6345ZUT+T support manual reset functionality?
No, the MAX6345ZUT+T does not include a manual-reset (MR) input. Unlike the MAX6342/MAX6343/MAX6344 variants, the MAX6345 replaces the MR pin with a second reset output - resulting in dedicated active-high and active-low push-pull RESET pins (pins 5 and 6). This configuration is confirmed in the Pin Description section and Selector Guide of the MAX6345ZUT+T datasheet.
How does the PFI/PFO function work in MAX6345ZUT+T?
The MAX6345ZUT+T uses its PFI pin to monitor an external voltage against an internal 1.25V reference. When the voltage at PFI falls below 1.25V (±100mV), the PFO pin drives low - providing a power-fail or low-battery warning independent of the reset outputs. This allows designers to implement early shutdown sequences or status alerts without affecting reset timing, as detailed in the Applications Information section of the MAX6345ZUT+T datasheet.
What is the reset timeout duration for MAX6345ZUT+T?
The MAX6345ZUT+T guarantees a minimum reset timeout period (tRP) of 100ms after VCC rises above the 2.33V threshold or after a valid reset event. The typical duration is 180ms, with a maximum of 280ms over temperature. This parameter is fully characterized and tested across −40°C to +125°C, ensuring compliance with microprocessor reset timing requirements such as those defined in JEDEC JESD78.
Is MAX6345ZUT+T pin-compatible with other devices in the MAX6342–MAX6345 family?
Yes, the MAX6345ZUT+T shares the identical 6-pin SOT23-6 package and pinout with all members of the MAX6342–MAX6345 family, including MAX6342ZUT+T and MAX6343ZUT+T. However, pin functions differ: MAX6345ZUT+T uses pin 5 for active-high RESET and pin 6 for active-low RESET, whereas MAX6342ZUT+T uses pin 5 for MR and pin 6 for active-low RESET. Board-level compatibility requires verifying signal routing alignment per variant.
MAX6345ZUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Obsolete
- 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 Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6345ZUT+T FAQ
1.How can I place an order for MAX6345ZUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345ZUT+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 MAX6345ZUT+T reliable?
The price and inventory of MAX6345ZUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345ZUT+T is usually 5 days.
3.What payment methods are accepted for MAX6345ZUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345ZUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345ZUT+T?
MAX6345ZUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345ZUT+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 MAX6345ZUT+T?
For technical support, including MAX6345ZUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345ZUT+T requirements.
6.How does Aetrix verify that MAX6345ZUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6345ZUT+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 MAX6345ZUT+T meets industry standards.
7.What is the process for return or replacement of MAX6345ZUT+T?
All MAX6345ZUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345ZUT+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 MAX6345ZUT+T part is unused and in its original packaging.
Return procedure for MAX6345ZUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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