My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6345SUT-T
- Part No.:
- MAX6345SUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345SUT-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,300
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6345SUT-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 2.93V VCC reset threshold, guaranteed reset assertion down to VCC = +1V, and integrated 1.25V power-fail comparator for low-battery or auxiliary supply monitoring - used in multivoltage embedded systems requiring reliable power sequencing and orderly shutdown.
For engineers reviewing the MAX6345SUT-T datasheet, MAX6345SUT-T pinout, MAX6345SUT-T application, or MAX6345SUT-T equivalent, key selection criteria include dual-reset polarity support, 100ms minimum reset timeout, SOT23-6 footprint compatibility, -40°C to +125°C operating range, and PFI/PFO-based voltage monitoring capability for system-level fault detection.
Technical Context
The MAX6345SUT-T implements a precision bandgap-based reset generator with two independent output drivers: one active-high push-pull (RESET) and one active-low push-pull (RESET), both asserted for ≥100ms after VCC rises above 2.93V or MR transitions high. Its internal 1.25V reference feeds a dedicated comparator on the PFI input, enabling accurate power-fail or secondary supply monitoring independent of the main reset function.
No manual-reset input (MR) is present - unlike MAX6342–MAX6344 - as the MAX6345 replaces MR with the second reset output. The device operates across full VCC range (1.0V to 5.5V), maintains valid logic levels on both RESET outputs down to VCC = +1V, and rejects transients ≤12µs at 100mV overdrive below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V ±1.5% (factory-trimmed; enables precise brownout detection for 3.3V systems) |
| Reset Timeout Period | 100ms min (guaranteed hold time ensures µP initialization completes before release) |
| Supply Voltage Range | +1.0V to +5.5V (supports operation during deep brownout and battery-backed operation) |
| PFI Threshold | +1.25V (enables configurable power-fail warning via external resistor divider) |
| Operating Temperature | -40°C to +125°C (qualified for automotive under-hood and industrial control environments) |
| Package | SOT23-6 (1.6mm × 2.9mm footprint; compatible with standard pick-and-place and reflow processes) |
| Reset Output Types | Active-high push-pull RESET + active-low push-pull RESET (eliminates need for external pull-up/pull-down resistors) |
Pinout & Package
MAX6345SUT-T is housed in a lead-free 6-pin SOT23 package (JEDEC MO-178AA), with 1.27mm pitch, 1.6mm width, and 2.9mm length. Thermal pad not present; standard solder profile applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Main supply input | Accepts 1.0V–5.5V; powers internal comparators, reference, and output drivers |
| 2 - GND | Analog/digital ground | Reference node for all thresholds and outputs; must be low-impedance connection |
| 3 - PFI | Power-fail monitor input | Compares external voltage against internal 1.25V reference; asserts PFO when input < 1.25V |
| 4 - PFO | Power-fail output | Open-drain output (100µA sink capability); signals early power degradation or low-battery condition |
| 5 - RESET | Active-high push-pull reset | Drives high during reset; no external pull-up required; valid down to VCC = +1V |
| 6 - RESET | Active-low push-pull reset | Drives low during reset; no external pull-down required; complements RESET for bidirectional µP interfaces |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low push-pull RESET signals eliminate level-shifting or external logic for mixed-interface systems |
| Factory-trimmed 2.93V threshold | ±1.5% accuracy over -40°C to +125°C avoids calibration overhead and supports 3.3V rail supervision without external components |
| 1.25V precision PFI reference | Enables accurate monitoring of secondary supplies (e.g., 5V, 12V, or negative rails) using only two external resistors |
| Guaranteed operation to VCC = +1V | Ensures deterministic reset behavior during battery discharge or unregulated input collapse - critical for data retention safety |
| Transient immunity | Rejects VCC glitches ≤12µs at 100mV overdrive, preventing spurious resets in noisy power environments |
Applications
| Portable/Battery-Powered Equipment | Multivoltage Systems |
|---|---|
Use Scenario: Smart meter with Li-ion backup, where main supply may drop during grid outage while backup sustains RTC and memory. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller rail and triggers orderly save-to-EEPROM sequence upon detected brownout via PFI monitoring of backup voltage. Use Value: Dual RESET outputs coordinate safe shutdown across primary and backup domains; 2.93V threshold matches typical 3.3V LDO dropout point. | Use Scenario: Industrial PLC with separate 5V I/O, 3.3V logic, and 2.5V FPGA rails requiring coordinated power-up sequencing. IC Role / Device Role / Timing Role: Provides synchronized reset assertion across multiple voltage domains using single VCC-supervised event and PFI-monitored 5V rail status. Use Value: Eliminates need for discrete supervisors per rail; PFO-driven interrupt allows firmware-controlled response to upstream supply failure. |
| Telecom Equipment | Embedded Control Systems |
Use Scenario: Optical line terminal (OLT) with hot-swap power modules and real-time traffic forwarding requirements. IC Role / Device Role / Timing Role: Monitors primary 3.3V processor rail and secondary 12V laser bias supply via PFI divider; asserts both RESET signals to halt packet processing and disable lasers before voltage collapse. Use Value: Prevents data corruption and laser damage by enabling sub-100ms fault isolation; dual outputs interface directly with ASIC reset and analog shutdown pins. | Use Scenario: Automotive body controller managing door locks, lighting, and CAN communication during cold-cranking (battery dip to 6V). IC Role / Device Role / Timing Role: Supervises 3.3V MCU supply and monitors 12V battery via PFI; uses PFO to trigger CAN wake-up interrupt before VCC falls below 2.93V. Use Value: Enables predictive wake-up and graceful state preservation during engine start; -40°C to +125°C rating ensures reliability in under-dash mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6344SUT-T | Single active-high push-pull RESET output; includes MR input instead of second RESET; identical 2.93V threshold and PFI/PFO functionality | Requires external reset logic or µP with bidirectional reset pin to generate complementary signal; suitable when manual reset is needed | Select MAX6344SUT-T only if MR functionality is required and dual-reset polarity is not - footprint and pinout differ (MR replaces RESET) |
| TPS3808G33DBVR | Single active-low open-drain RESET; 3.3V fixed threshold; no PFI/PFO; lower quiescent current (1.1µA vs 25µA) | Lacks power-fail monitoring and dual-output capability; requires external pull-up; limited to single-rail 3.3V systems without auxiliary voltage supervision | Choose TPS3808G33DBVR for cost-sensitive, single-supply applications where PFI monitoring and dual-reset are unnecessary |
Compared with MAX6344SUT-T, MAX6345SUT-T trades manual reset capability for dual-polarity reset outputs - simplifying interface design but removing field-service reset option; versus TPS3808G33DBVR, it adds PFI-based fault prediction and eliminates external pull-up dependency at the cost of higher supply current and larger feature set.
Availability
MAX6345SUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, telecom infrastructure, and automotive embedded control systems requiring stable component supply, long-term lifecycle assurance, and extended temperature qualification.
Supply support for MAX6345SUT-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 delivers highly accurate, low-power µP supervisory functions with integrated power-fail detection - engineered specifically for systems where deterministic reset timing, multi-rail coordination, and early fault warning are critical to functional safety.
FAQ
What is the factory-set reset threshold voltage for MAX6345SUT-T?
The MAX6345SUT-T has a factory-trimmed VCC reset threshold of 2.93V, with ±1.5% tolerance over the full -40°C to +125°C temperature range. This value is laser-trimmed during production and specified in Maxim's Selector Guide 2. The 'S' suffix in MAX6345SUT-T explicitly denotes the 2.93V variant, and this threshold is confirmed in the Electrical Characteristics table under VTH parameter for MAX634_S.
Does MAX6345SUT-T include a manual-reset (MR) input?
No, MAX6345SUT-T does not include a manual-reset (MR) input. Unlike MAX6342–MAX6344 variants, the MAX6345 replaces the MR pin with a second reset output (active-high RESET). Pin 5 is RESET and Pin 6 is RESET - both are push-pull outputs. This is clearly shown in the Pin Configurations diagram and confirmed in the "Selector Guide 2" table, which lists MAX6345 with "-" under MANUAL-RESET INPUT.
What is the function of the PFI and PFO pins on MAX6345SUT-T?
The PFI (Pin 3) is the power-fail input, internally compared to a precise +1.25V reference; when voltage at PFI falls below 1.25V, the PFO (Pin 4) output goes low. PFO is an open-drain output capable of sinking 100µA, used for early-warning signaling - e.g., triggering µP interrupts prior to main supply collapse. This functionality is identical across MAX6342–MAX6345 and is detailed in the "Power-Fail Comparator" section of the datasheet.
What are the electrical characteristics of the two RESET outputs on MAX6345SUT-T?
MAX6345SUT-T provides two independent push-pull reset outputs: Pin 5 (RESET, active-high) and Pin 6 (RESET, active-low). Both are guaranteed valid down to VCC = +1V. RESET drives high with VOH ≥ 0.8×VCC (at ISOURCE = 50µA), and RESET drives low with VOL ≤ 0.4V (at ISINK = 100µA). These values are specified in the Electrical Characteristics table under VOH and VOL columns for MAX634_S, confirming rail-to-rail drive capability without external resistors.
Is MAX6345SUT-T qualified for automotive applications?
Yes, MAX6345SUT-T is qualified for automotive applications: its operating temperature range is -40°C to +125°C, and it meets AEC-Q100 stress test requirements as documented in Maxim's automotive-grade product documentation. The SOT23-6 package, 2.93V threshold, and robust transient immunity (12µs glitch rejection) make it suitable for body control modules, infotainment power supervision, and ADAS subsystems where extended temperature performance and deterministic reset behavior are mandatory.
MAX6345SUT-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:
- 2.93V
- 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
MAX6345SUT-T FAQ
1.How can I place an order for MAX6345SUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345SUT-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 MAX6345SUT-T reliable?
The price and inventory of MAX6345SUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345SUT-T is usually 5 days.
3.What payment methods are accepted for MAX6345SUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345SUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345SUT-T?
MAX6345SUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345SUT-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 MAX6345SUT-T?
For technical support, including MAX6345SUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345SUT-T requirements.
6.How does Aetrix verify that MAX6345SUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6345SUT-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 MAX6345SUT-T meets industry standards.
7.What is the process for return or replacement of MAX6345SUT-T?
All MAX6345SUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345SUT-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 MAX6345SUT-T part is unused and in its original packaging.
Return procedure for MAX6345SUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6345SUT-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…
