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Analog Devices Inc./Maxim Integrated MAX6468US30D3-T
- Part No.:
- MAX6468US30D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US30D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6468US30D3-T from Maxim Integrated is a push-pull output microprocessor supervisory reset circuit monitoring +3.0V supply voltage with factory-trimmed 3.000V threshold (±1.5% at +25°C), 150ms minimum reset timeout, and edge-triggered manual reset. It ensures reliable µP reset during power-up, brownout, and transient events in automotive-grade embedded systems operating from -40°C to +125°C.
For engineers reviewing the MAX6468US30D3-T datasheet, MAX6468US30D3-T pinout, MAX6468US30D3-T application, or MAX6468US30D3-T equivalent, this device delivers precision voltage monitoring, glitch-immune manual reset, low 3µA supply current at 1.8V, and guaranteed RESET validity down to VCC = +1V - critical for robust industrial and automotive power sequencing.
Technical Context
The MAX6468US30D3-T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its 3.000V threshold, asserting an active-low push-pull RESET output. Its internal one-shot timer initiates a fixed 150ms (min) reset pulse on either VCC dropout or MR falling edge.
It features built-in MR debounce (150ms rising-edge ignore window), 100ns MR glitch rejection, and immunity to short VCC transients - validated by the Maximum Transient Duration vs. Overdrive curve. RESET remains functional down to VCC = +1V, enabling operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.000V ±1.5% at +25°C; monitors +3.0V supply with tight tolerance for stable µP initialization |
| Reset Timeout Period | 150ms (min) / 300ms (max); ensures sufficient hold time for full µP reset across temperature (-40°C to +125°C) |
| Supply Current | 3µA at VCC = +1.8V; enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Operating Voltage Range | +1.2V to +5.5V; supports wide input range while maintaining valid RESET down to VCC = +1V |
| MR Glitch Rejection | 100ns; rejects mechanical switch bounce and EMI-induced noise on manual reset line |
| MR Rising Debounce | 150ms (min); prevents multiple resets from switch chatter after release |
| Output Type | Active-low push-pull; eliminates need for external pullup resistor, simplifying PCB layout and reducing BOM count |
Pinout & Package
MAX6468US30D3-T is housed in a 4-pin SOT143 package (U3+1 outline, 90-0183 land pattern), optimized for space-constrained automotive and portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Primary return path for internal circuitry and RESET sink current; requires low-impedance connection to system ground plane |
| 2: RESET | Active-low reset output | Push-pull driver asserts low during VCC dropout or MR trigger; drives µP RESET pin directly without external components |
| 3: MR | Edge-triggered manual reset input | Falling edge initiates one-shot 150ms reset pulse; includes internal 1.5kΩ pullup to VCC and 100ns glitch rejection |
| 4: VCC | Power and monitored supply | Provides operating power and serves as monitored rail; bypass with 0.1µF capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 3.000V threshold | Eliminates external resistor divider, reduces component count, and guarantees ±1.5% accuracy at +25°C for consistent +3.0V supply monitoring |
| Edge-triggered MR with one-shot timing | Ensures exactly one 150ms reset pulse per button press regardless of press duration, preventing spurious reboots in field-deployed equipment |
| RESET valid to VCC = +1V | Guarantees clean reset assertion during deep brownout or slow power-down sequences where VCC decays below typical logic thresholds |
| 100ns MR glitch rejection | Rejects high-frequency noise and contact bounce without external RC filtering, reducing design validation effort and board area |
| -40°C to +125°C automotive qualification | Meets AEC-Q100 stress test requirements for under-hood and infotainment applications requiring extended temperature reliability |
Applications
| Automotive Infotainment | Industrial PLC Controller |
|---|---|
|
Use Scenario: Reset management for ARM-based head unit SoC during cold crank or alternator load dump events. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET to SoC during VCC dip below 3.0V or user-initiated hard reset. Use Value: Prevents firmware corruption by guaranteeing ≥150ms reset pulse even when VCC recovers rapidly, meeting ISO 16750-2 pulse 4a/b immunity requirements. |
Use Scenario: Power-on and brownout reset for microcontroller in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Monitors +3.3V logic rail derived from isolated DC/DC converter; triggers reset if input dips due to line sag or overload. Use Value: Factory-trimmed 3.000V threshold matches 3.3V rail tolerance (±10%), eliminating calibration and ensuring deterministic reset behavior across production lots. |
| Medical Patient Monitor | DSL Modem Power Sequencing |
|
Use Scenario: Ensuring safe boot sequence for FPGA and MCU in Class II medical device with dual-redundant power supplies. IC Role / Device Role / Timing Role: Primary supervisor for main 3.0V domain; provides reset signal synchronized to both supply rails via OR-ing diode network. Use Value: Push-pull output drives FPGA PROG_B and MCU nRST simultaneously without pullup conflicts, supporting IEC 62304 safety-critical boot verification. |
Use Scenario: Coordinating reset timing between ADSL PHY and host processor during power-up and line retrain cycles. IC Role / Device Role / Timing Role: Generates 150ms reset pulse aligned to 3.0V rail stabilization, enabling proper PHY initialization before firmware execution. Use Value: Immunity to 100ns transients prevents false resets during DSL line surge events, improving modem uptime and reducing service calls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US30D3-T | Same 3.0V threshold and 150ms timeout, but open-drain output requiring external pullup; higher ICC (8µA typ at 1.8V) | Lacks push-pull drive strength; unsuitable for direct FPGA PROG_B or multi-load reset bus without level-shifting | Select when legacy board uses open-drain topology or cost-sensitive designs where pullup resistor is already present |
| TLV803EC30DBZR | 3.0V threshold, 140ms min timeout, SOT-23-3 package; no MR input, only power-on reset | Cannot support manual reset functionality; lacks edge-triggered MR and debounce logic | Select only for simple power-on reset applications where operator-initiated reset is unnecessary |
Compared with MAX6468US30D3-T, MAX6315US30D3-T requires external pullup and draws more current, while TLV803EC30DBZR omits manual reset entirely - making MAX6468US30D3-T the only option delivering integrated push-pull drive, edge-triggered MR, and automotive temperature range in a single 4-pin SOT143 package.
Availability
MAX6468US30D3-T is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC controllers, and medical patient monitors requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.
Supply support for MAX6468US30D3-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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6467/MAX6468 product line delivers highly accurate, low-power supervisory circuits with factory-trimmed thresholds and robust manual reset for mission-critical embedded systems requiring guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage for MAX6468US30D3-T and how tightly is it specified?
The MAX6468US30D3-T has a factory-trimmed reset threshold of 3.000V with ±1.5% tolerance at +25°C, tightening to ±2.5% over -40°C to +85°C and ±3% over +85°C to +125°C. This precision eliminates external resistor networks and ensures consistent +3.0V supply monitoring across automotive and industrial environments where voltage tolerances are strict.
Does MAX6468US30D3-T support manual reset, and how does its edge-triggered behavior differ from level-sensitive alternatives?
Yes, MAX6468US30D3-T features an edge-triggered manual reset (MR) input that responds only to the falling edge, generating a fixed 150ms one-shot reset pulse regardless of how long MR is held low. Unlike level-sensitive supervisors, this prevents repeated resets from stuck buttons and ensures deterministic behavior - critical for field-deployed equipment where operator interface reliability is essential.
What is the minimum operating voltage for MAX6468US30D3-T, and does RESET remain valid at low VCC?
MAX6468US30D3-T operates down to VCC = +1.2V over -40°C to 0°C and +1.0V over 0°C to +125°C, with RESET guaranteed valid as long as VCC remains above +1V. This allows reliable reset assertion during deep brownout conditions where other supervisors fail, ensuring µP stays in reset until supply stabilizes - a key requirement for automotive and medical safety-critical systems.
How does the push-pull output of MAX6468US30D3-T simplify system design compared to open-drain alternatives?
The push-pull RESET output of MAX6468US30D3-T actively drives both high and low states, eliminating the need for an external pullup resistor. This reduces BOM count, saves PCB space, avoids pullup-related timing delays, and enables direct driving of multiple loads (e.g., µP nRST and FPGA PROG_B) without signal contention - unlike open-drain versions such as MAX6467 that require careful pullup selection and layout.
Is MAX6468US30D3-T qualified for automotive applications, and what temperature range does it support?
Yes, MAX6468US30D3-T is specified for the automotive temperature range of -40°C to +125°C and is offered in lead-free RoHS-compliant packaging. Its BiCMOS process, 150ms MR debounce, 100ns glitch rejection, and guaranteed performance across this full range make it suitable for under-hood ECUs, infotainment head units, and ADAS modules requiring AEC-Q100–level reliability.
MAX6468US30D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6468US30D3-T FAQ
1.How can I place an order for MAX6468US30D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US30D3-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 MAX6468US30D3-T reliable?
The price and inventory of MAX6468US30D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US30D3-T is usually 5 days.
3.What payment methods are accepted for MAX6468US30D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US30D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468US30D3-T?
MAX6468US30D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US30D3-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 MAX6468US30D3-T?
For technical support, including MAX6468US30D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US30D3-T requirements.
6.How does Aetrix verify that MAX6468US30D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6468US30D3-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 MAX6468US30D3-T meets industry standards.
7.What is the process for return or replacement of MAX6468US30D3-T?
All MAX6468US30D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US30D3-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 MAX6468US30D3-T part is unused and in its original packaging.
Return procedure for MAX6468US30D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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