My Inquiry
My Account
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 SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6345ZUT-T 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 (PFI), and guaranteed RESET assertion down to VCC = +1V. It monitors supply integrity in multivoltage embedded systems and provides early warning for brownout or battery depletion.
For engineers reviewing the MAX6345ZUT-T datasheet, MAX6345ZUT-T pinout, MAX6345ZUT-T application, or MAX6345ZUT-T equivalent, key selection criteria include dual-reset output polarity, 2.33V threshold accuracy over –40°C to +125°C, PFI/PFO monitoring capability, and SOT23-6 footprint compatibility with manual reset omission.
Technical Context
The MAX6345ZUT-T implements a precision bandgap-based voltage reference and comparator architecture to generate reset signals with 100ms minimum timeout. Its dual-reset topology-active-high push-pull (RESET) and active-low push-pull (RESET)-enables direct interface with µPs requiring either polarity without external inversion or pull-up networks.
It integrates a dedicated +1.25V reference for the PFI input, allowing independent monitoring of secondary supplies (e.g., backup rails or analog subsystems) via resistor dividers. The absence of MR input frees Pin 5 for RESET, distinguishing it from MAX6342–MAX6344 variants and enabling deterministic reset initiation solely from VCC and PFI events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.33V ±25mV (factory-trimmed, specified over –40°C to +125°C) |
| Reset Timeout Period | 100ms min (ensures µP initialization completes before release) |
| PFI Threshold Voltage | +1.25V (enables configurable power-fail or low-battery detection) |
| Supply Voltage Range | +1.0V to +5.5V (guarantees valid reset operation during deep brownout) |
| Output Drive | Push-pull RESET (VOH ≥ 0.8×VCC, VOL ≤ 0.4V at ISINK = 1.2mA) |
| Operating Temperature | –40°C to +125°C (qualified for automotive and industrial environments) |
| Package | SOT23-6 (1.6mm × 2.9mm footprint, surface-mount compatible) |
Pinout & Package
MAX6345ZUT-T is housed in a lead-free 6-pin SOT23-6 package (JEDEC MO-178AA), with 1.27mm pitch, 0.95mm max height, and thermal pad omitted. Pin 1 marked by dot; orientation per standard SOT23 top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; powers internal comparators and outputs; supports 1.0V–5.5V operation |
| 2 | GND | Analog/digital ground reference; must be low-impedance connection to system ground plane |
| 3 | PFI | Power-fail input; comparator inverting input referenced to +1.25V; asserts PFO when voltage < 1.25V |
| 4 | PFO | Power-fail open-drain output; active-low signal indicating secondary supply fault or battery depletion |
| 5 | RESET | Active-high push-pull reset output; driven high for ≥100ms after VCC exceeds 2.33V |
| 6 | RESET | Active-low push-pull reset output; driven low for ≥100ms after VCC exceeds 2.33V |
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 translators |
| Factory-trimmed 2.33V threshold | ±25mV tolerance over full temperature range ensures reliable reset timing without calibration |
| +1.25V precision PFI reference | Enables accurate monitoring of auxiliary supplies (e.g., 3.3V, 2.5V, or battery rails) using simple resistor dividers |
| Valid reset down to VCC = +1V | Guarantees clean µP reset assertion during severe brownout or battery sag conditions |
| 100ms minimum reset pulse width | Meets µP minimum reset hold-time requirements across all operating voltages and temperatures |
Applications
| Industrial PLC Controller | Automotive Telematics Module |
|---|---|
|
Use Scenario: Power sequencing and brownout protection in programmable logic controllers with dual 24V/5V rails. IC Role / Device Role / Timing Role: Supervisory IC asserting synchronized active-high and active-low reset to FPGA and ARM Cortex-M7 core during VCC dropout. Use Value: Prevents firmware corruption by guaranteeing ≥100ms reset hold time even as main 5V rail sags to 1.8V. |
Use Scenario: Cold-cranking resilience in LTE/V2X telematics units powered from vehicle battery (9V–16V) with LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: Dual-reset supervisor triggering controlled shutdown via PFI monitoring of 3.3V LDO output during engine start transient. Use Value: Uses +1.25V PFI reference to detect 3.3V rail collapse 50ms before µP reset threshold breach, enabling graceful CAN bus logout. |
| Medical Infusion Pump | 5G Small Cell Baseband Unit |
|
Use Scenario: Safety-critical power monitoring in battery-backed infusion pumps with isolated 5V and 3.3V domains. IC Role / Device Role / Timing Role: Reset generator providing redundant reset signals to safety MCU and motor driver ASIC during Li-ion battery discharge below 3.0V. Use Value: 2.33V VCC threshold aligns with end-of-discharge voltage of single-cell Li-ion, ensuring timely shutdown before data loss. |
Use Scenario: Multirail supervision in compact 5G baseband units with 12V, 5V, 3.3V, and 1.8V supplies feeding FPGAs and ADCs. IC Role / Device Role / Timing Role: Centralized supervisor using PFI to monitor 1.8V analog supply while generating coordinated resets for digital and RF subsystems. Use Value: Eliminates discrete reset ICs per rail by leveraging PFI divider to trip on 1.8V rail drop while maintaining precise 2.33V main VCC reset point. |
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; includes MR input (Pin 5); no active-high reset output | Requires external inverter or µP with active-low-only reset input; supports manual reset via pushbutton | Select when manual reset capability is required and only one reset polarity is needed |
| TLV809E23DBZR | Single active-low open-drain reset; 2.32V threshold; no PFI/PFO; SOT23-3 package | Lacks dual-reset outputs and power-fail monitoring; smaller footprint but no secondary supply monitoring | Select for cost-sensitive, space-constrained designs where only basic VCC supervision is required |
Compared with MAX6342ZUT-T and TLV809E23DBZR, the MAX6345ZUT-T uniquely delivers concurrent active-high and active-low reset signaling plus integrated PFI-based power-fail detection in the same SOT23-6 footprint-enabling higher system reliability without increasing board area or component count.
Availability
MAX6345ZUT-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive telematics modules, medical infusion pumps, and 5G small cell baseband units 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6342–MAX6345 family was designed specifically for robust, low-power microprocessor supervision in harsh environments-emphasizing precision threshold stability, wide supply range, and integrated power-fail warning capability.
FAQ
What is the exact reset threshold voltage of the MAX6345ZUT-T?
The MAX6345ZUT-T has a factory-trimmed VCC reset threshold of 2.33V, with a maximum deviation of ±25mV over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and documented in the Electrical Characteristics table of the MAX6345ZUT-T datasheet under parameter VTH. It is not adjustable and applies specifically to the "Z" suffix variant.
Does the MAX6345ZUT-T include a manual reset (MR) input?
No, the MAX6345ZUT-T does not include a manual reset (MR) input. Unlike the MAX6342ZUT-T, MAX6343ZUT-T, and MAX6344ZUT-T, the MAX6345ZUT-T replaces the MR pin with a second reset output (RESET), providing both active-high and active-low push-pull reset signals. Pin 5 is RESET, not MR-this is confirmed in the Pin Description section and functional diagram for MAX6345 in the MAX6345ZUT-T datasheet.
How does the PFI input function in the MAX6345ZUT-T?
The PFI (Power-Fail Input) of the MAX6345ZUT-T connects to an internal +1.25V comparator reference. When the voltage at PFI falls below +1.25V, the PFO output goes low, signaling a power-fail or low-battery condition. Users configure detection thresholds for secondary supplies (e.g., 3.3V or 2.5V rails) using external resistor dividers on PFI, as shown in Figure 7 of the MAX6345ZUT-T datasheet.
What is the minimum VCC voltage at which the MAX6345ZUT-T guarantees valid reset output levels?
The MAX6345ZUT-T guarantees valid RESET and RESET output logic levels down to VCC = +1.0V. This is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables of the MAX6345ZUT-T datasheet. Below +1.0V, operation is not characterized, and reset behavior is not assured.
Is the MAX6345ZUT-T pin-compatible with other members of the MAX6342–MAX6345 family?
The MAX6345ZUT-T shares the same SOT23-6 package and pinout numbering as MAX6342ZUT-T, MAX6343ZUT-T, and MAX6344ZUT-T, but its Pin 5 function differs: it is RESET (active-high), not MR. Therefore, it is not a drop-in replacement-board-level changes are required if substituting for a part with MR functionality. The MAX6345ZUT-T pin mapping is validated in the Pin Configurations section of its datasheet.
MAX6345ZUT-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:
- 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-23-6
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.
MAX6345ZUT-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
