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Analog Devices Inc./Maxim Integrated MAX6342SUT+T
- Part No.:
- MAX6342SUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6342SUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,310
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Product details
Overview
MAX6342SUT+T from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-6 package, featuring a factory-trimmed 2.93V VCC reset threshold, active-low push-pull RESET output, and manual-reset (MR) input. It monitors supply voltage down to +1V, guarantees ≥100ms reset pulse width, and includes a dedicated +1.25V power-fail comparator (PFI/PFO) for low-battery or auxiliary rail monitoring in portable and multivoltage systems.
For engineers reviewing the MAX6342SUT+T datasheet, MAX6342SUT+T pinout, MAX6342SUT+T application, or MAX6342SUT+T equivalent, key selection criteria include its 2.93V reset threshold tolerance (±25mV over -40°C to +125°C), guaranteed RESET validity at VCC = +1V, debounced MR input with <1µs glitch rejection, and integrated PFO comparator independent of reset assertion timing.
Technical Context
The MAX6342SUT+T implements a precision bandgap-based reset generator with hysteresis, asserting RESET when VCC falls below 2.93V and holding it active for ≥100ms after VCC rises above threshold or MR transitions high. Its PFI input connects to an internal +1.25V reference, enabling accurate power-fail detection via external resistor dividers.
It operates across full industrial temperature range (-40°C to +125°C) with supply current as low as 1.2µA at VCC = 1V and 30µA at VCC = 5.5V, supporting battery-powered designs requiring ultra-low quiescent power and robust brownout immunity without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V ±25mV (–40°C to +125°C); ensures reliable reset initiation during 3.3V system brownout |
| RESET Pulse Width | 100ms min; provides sufficient time for µP initialization before release | Supply Voltage Range | +1.0V to +5.5V; enables operation during deep brownout and compatibility with 1.2V–5V rails |
| RESET Output Type | Active-low push-pull; drives logic-low directly without pull-up resistor, reducing BOM count |
| PFI Threshold | +1.25V ±100mV; supports accurate power-fail warning or secondary supply monitoring via resistor divider |
| MR Input Compatibility | CMOS-compatible with 0.3×VCC/0.7×VCC thresholds; allows direct connection to pushbutton or µP GPIO |
| Quiescent Current | 1.2µA at VCC = 1V; extends battery life in always-on portable equipment |
Pinout & Package
Package: 6-pin SOT23-6, 1.6mm × 2.9mm × 1.1mm body, surface-mount, lead-free (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Accepts +1.0V to +5.5V; powers internal comparators and reset generator |
| 2 - GND | Ground reference | Return path for all internal circuits; must be low-impedance for noise immunity |
| 3 - PFI | Power-fail input | Compares external voltage against internal +1.25V reference; asserts PFO when input <1.25V |
| 4 - PFO | Power-fail output | Open-drain output active-low; signals early power degradation or low-battery condition |
| 5 - MR | Manual-reset input | CMOS-compatible active-low trigger; debounced internally to reject <1µs glitches |
| 6 - RESET | Reset output | Active-low push-pull; drives µP reset pin low for ≥100ms after power-up or MR event |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 2.93V with ±25mV max deviation over full temperature range eliminates external calibration |
| Guaranteed RESET validity down to VCC = +1V | Ensures deterministic reset behavior even during severe brownout-no undefined states |
| Integrated +1.25V power-fail comparator | Enables dual-rail monitoring (e.g., main VCC + backup battery) without adding discrete comparators |
| Debounced CMOS MR input | Supports direct pushbutton interface with no external RC filter required |
| Ultra-low supply current | 1.2µA at 1V enables multi-year operation on coin-cell batteries in standby mode |
Applications
| Portable Computers | Telecom Equipment |
|---|---|
Use Scenario: Real-time battery voltage monitoring during sleep mode to initiate graceful shutdown before critical depletion. IC Role / Device Role / Timing Role: Power-fail comparator (PFI/PFO) detects falling battery voltage; RESET holds CPU in reset while firmware saves state. Use Value: Prevents data corruption by ensuring µP completes save routines before VCC drops below operational minimum. | Use Scenario: Monitoring redundant 3.3V and 5V power rails in line cards to detect early failure before system crash. IC Role / Device Role / Timing Role: Dual-supply supervision using PFI divider on secondary rail; RESET asserts on primary rail fault with 100ms hold time. Use Value: Enables hot-swap controller to isolate faulty module within defined timing window, avoiding cascading failures. |
| Portable/Battery-Powered Equipment | Multivoltage Systems |
Use Scenario: Wearable medical sensor operating from single Li-ion cell with dynamic voltage scaling. IC Role / Device Role / Timing Role: Supervises 2.93V threshold aligned to MCU's minimum operating voltage; MR supports user-initiated recalibration. Use Value: Eliminates need for separate voltage monitor IC and reduces PCB area by 30% vs. discrete solution. | Use Scenario: Industrial PLC with mixed 1.8V, 3.3V, and 5V domains requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Primary reset generator for 3.3V domain; PFI monitors 5V rail to assert PFO and trigger secondary supervisor via MR. Use Value: Enables hierarchical reset architecture with deterministic inter-domain timing-no race conditions during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6343SUT+T | Same 2.93V threshold and PFI/PFO, but open-drain RESET output | Requires external pull-up resistor; suited for wired-OR reset buses or level-shifting | Select when interfacing with multiple devices sharing one reset line or needing voltage-level flexibility |
| TPS3808G30DBVR | 2.93V threshold, but only push-pull active-low RESET; no PFI/PFO comparator | Lacks dedicated power-fail warning capability; requires external circuitry for secondary rail monitoring | Select when power-fail functionality is unnecessary and lowest BOM cost is prioritized |
Compared with MAX6343SUT+T, the MAX6342SUT+T eliminates external pull-up components and simplifies layout; compared with TPS3808G30DBVR, it integrates PFI/PFO for dual-supply monitoring-reducing total component count by one IC in multirail systems.
Availability
MAX6342SUT+T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6342SUT+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-targeting space-constrained, battery-sensitive systems where reliability and minimal external components are critical.
FAQ
What is the exact reset threshold voltage of the MAX6342SUT+T and how tightly is it specified?
The MAX6342SUT+T has a factory-trimmed nominal reset threshold of 2.93V, with a maximum deviation of ±25mV over the full operating temperature range of –40°C to +125°C. This specification is guaranteed in production testing and ensures consistent brownout detection across extreme environmental conditions without requiring system-level calibration. The 2.93V threshold aligns precisely with common 3.3V rail minimum operating voltages.
Does the MAX6342SUT+T provide valid reset output when VCC drops below 2.0V?
Yes-the MAX6342SUT+T guarantees valid RESET output down to VCC = +1.0V, meaning the active-low RESET signal remains logically asserted and electrically compliant (VOL ≤ 0.4V at ISINK = 100µA) even as supply voltage collapses. This ensures deterministic µP behavior during deep brownout events, unlike many supervisors that lose reset integrity below 2.0V.
Can the PFI input of the MAX6342SUT+T be used to monitor a 5V supply for early power-fail warning?
Yes-the PFI input compares against an internal +1.25V reference, so a resistor divider (e.g., R1 = 301kΩ, R2 = 100kΩ) scales the 5V rail to ~1.25V at PFI. When the 5V supply drops to ~4.75V, PFI falls below 1.25V and PFO asserts, providing >100ms warning before VCC crosses the 2.93V reset threshold. This enables orderly shutdown in systems with regulated outputs.
How does the manual-reset (MR) input of the MAX6342SUT+T behave during power-up?
The MR input is fully functional at power-up: if MR is held low during VCC ramp, RESET remains asserted regardless of VCC level. Once VCC exceeds 2.93V, releasing MR high initiates the 100ms reset timeout period before RESET deasserts. The input is debounced internally to reject glitches <1µs, eliminating need for external filtering-even when driven directly by a mechanical switch.
Is the MAX6342SUT+T pin-compatible with other members of the MAX6342–MAX6345 family?
No-while all MAX6342–MAX6345 devices share the same SOT23-6 package and pinout, the MAX6342SUT+T has a unique function mapping: Pin 6 is active-low push-pull RESET, whereas MAX6343SUT+T uses Pin 6 for open-drain RESET and MAX6344SUT+T uses it for active-high push-pull RESET. Swapping parts without verifying reset polarity and drive strength risks system malfunction.
MAX6342SUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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-6
MAX6342SUT+T FAQ
1.How can I place an order for MAX6342SUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6342SUT+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 MAX6342SUT+T reliable?
The price and inventory of MAX6342SUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6342SUT+T is usually 5 days.
3.What payment methods are accepted for MAX6342SUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6342SUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6342SUT+T?
MAX6342SUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6342SUT+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 MAX6342SUT+T?
For technical support, including MAX6342SUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6342SUT+T requirements.
6.How does Aetrix verify that MAX6342SUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6342SUT+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 MAX6342SUT+T meets industry standards.
7.What is the process for return or replacement of MAX6342SUT+T?
All MAX6342SUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6342SUT+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 MAX6342SUT+T part is unused and in its original packaging.
Return procedure for MAX6342SUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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