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Analog Devices Inc./Maxim Integrated MAX6468XS46D3-T
- Part No.:
- MAX6468XS46D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6468XS46D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6468XS46D3-T from Maxim Integrated is a push-pull output microprocessor supervisory reset circuit designed to monitor +4.625V supply rails with ±1.5% threshold accuracy at +25°C and assert an active-low RESET signal during brownout, power-up, or manual reset events. It features a 150ms (min) VCC reset timeout, edge-triggered one-shot manual reset input, and operates over -40°C to +125°C in automotive-grade SC70-4 packaging. Used in GPS systems and DSL modems for reliable power-on initialization.
For engineers reviewing the MAX6468XS46D3-T datasheet, MAX6468XS46D3-T pinout, MAX6468XS46D3-T application, or MAX6468XS46D3-T equivalent, key selection criteria include its factory-trimmed 4.625V reset threshold, 150ms minimum reset timeout, push-pull RESET output compatibility with 500µA source current, and immunity to <100ns MR glitches - critical for noise-prone embedded control environments.
Technical Context
The MAX6468XS46D3-T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 4.625V (±1.5% at +25°C, ±3% at +125°C), triggering a deterministic reset pulse. Its internal one-shot timer ensures fixed-duration RESET assertion independent of MR input duration.
MR input includes 1.5kΩ internal pullup and 150ms rising-edge debounce logic to suppress switch bounce; RESET output uses CMOS push-pull structure capable of sourcing 500µA at 0.8×VCC while sinking 1.2mA at VCC ≥ +2.5V, maintaining validity down to VCC = +1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.625V (typ), ±1.5% tolerance at +25°C - precisely targets +5.0V supply monitoring with margin for ripple and drift |
| VCC Operating Range | +1.2V to +5.5V - supports operation down to 1.2V during brownout while maintaining reset assertion integrity |
| Reset Timeout Period | 150ms (min) - meets minimum reset hold time requirements for ARM Cortex-M and PIC microcontrollers |
| Supply Current | 3µA at VCC = +1.8V - enables use in battery-powered GPS receivers with multi-year shelf life |
| MR Glitch Rejection | 100ns - rejects EMI-induced transients on manual reset lines without external RC filtering |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor, simplifying PCB layout vs. open-drain alternatives |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial motor drive applications |
Pinout & Package
MAX6468XS46D3-T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm footprint, 0.65mm pitch), optimized for space-constrained portable electronics. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal biasing and RESET sink current; requires low-inductance connection to system ground plane |
| 2 (RESET) | Active-low reset output | Push-pull driver asserts low during VCC brownout or MR edge trigger; sources 500µA when high, sinks 1.2mA when low |
| 3 (MR) | Edge-triggered manual reset input | Falling edge initiates one-shot 150ms RESET pulse; internal 1.5kΩ pullup allows direct switch-to-GND connection |
| 4 (VCC) | Power supply and monitored rail | Supplies device core and serves as input to voltage comparator; bypass with 0.1µF capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set threshold | 4.625V ±1.5% at +25°C eliminates calibration overhead and external resistor dividers for +5V systems |
| Edge-triggered MR with one-shot timing | Guarantees exactly one 150ms RESET pulse per MR button press, preventing repeated resets from contact bounce |
| Push-pull RESET output | Removes dependency on external pullup resistors, reducing BOM count and enabling direct interface with 3.3V/5V µP reset inputs |
| Low 3µA supply current | Extends battery runtime in portable medical devices and handheld test equipment operating from coin cells |
| Valid RESET down to VCC = +1V | Ensures clean reset deassertion during deep brownout recovery, avoiding metastability in downstream logic |
Applications
| GPS Systems | DSL Modems |
|---|---|
|
Use Scenario: Cold-start acquisition in automotive navigation units exposed to engine cranking voltage drops. IC Role / Device Role / Timing Role: Monitors +5V main rail and asserts RESET until stable post-cranking, ensuring GNSS receiver initializes cleanly. Use Value: 4.625V threshold aligns with +5V supply tolerance; 150ms timeout exceeds typical GPS baseband processor reset requirement. |
Use Scenario: Power sequencing during ADSL line retraining after lightning-induced surges. IC Role / Device Role / Timing Role: Detects transient VCC sag on digital PHY supply and forces full modem reset to clear corrupted state machines. Use Value: 100ns MR glitch rejection prevents false resets from ESD-coupled noise on front-panel reset buttons. |
| Automotive Infotainment | Industrial PLC I/O Modules |
|
Use Scenario: Hot-car restart after ignition cycle where 12V-to-5V DC/DC output exhibits slow rise time. IC Role / Device Role / Timing Role: Holds µP in reset until +5V rail stabilizes above 4.625V, preventing firmware execution from corrupted memory. Use Value: -40°C to +125°C rating matches AEC-Q100 Grade 2 requirements; SC70 package fits tight head-unit layouts. |
Use Scenario: Field-replaceable I/O card subjected to 24V supply interruptions during factory maintenance. IC Role / Device Role / Timing Role: Generates synchronized reset across multiple FPGA and ADC subsystems upon 24V-to-3.3V converter dropout. Use Value: Push-pull output drives long traces to distributed reset nets without signal degradation or timing skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6386US46D3-T | Same 4.625V threshold and 150ms timeout, but open-drain RESET output requiring external pullup | Suitable where shared reset bus with wired-OR logic is needed; incompatible with direct push-pull interface | Select when system already uses pullup-resistor architecture or shares RESET net with multiple supervisors |
| TLV809E46DBZR | 4.63V threshold (±2%), 140ms min timeout, SOT-23-3 package, no MR input | Lacks manual reset functionality; limited to VCC-only monitoring in cost-sensitive consumer designs | Choose only if manual reset is unnecessary and board space permits SOT-23-3 vs. SC70-4 footprint |
Compared with MAX6468XS46D3-T, MAX6386US46D3-T requires PCB-level pullup redesign and offers no advantage in threshold accuracy or temperature range, while TLV809E46DBZR sacrifices MR functionality and automotive qualification - making MAX6468XS46D3-T the optimal choice for robust, feature-complete reset supervision.
Availability
MAX6468XS46D3-T is available at Aetrix Electronics and suitable for GPS systems, DSL modems, automotive infotainment, industrial PLC I/O modules, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6468XS46D3-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 industrial, automotive, and communications applications with emphasis on reliability and integration.
The MAX6467/MAX6468 family delivers automotive-grade microprocessor supervisory circuits with factory-trimmed thresholds and edge-triggered manual reset - engineered specifically for noise-immune power monitoring in harsh environments.
FAQ
What is the exact reset threshold voltage of the MAX6468XS46D3-T?
The MAX6468XS46D3-T has a factory-trimmed nominal reset threshold of 4.625V, with guaranteed tolerance of ±1.5% at +25°C and ±3% over the full -40°C to +125°C operating range. This value is laser-trimmed during production and documented in the Reset Threshold table of the datasheet; it directly targets +5.0V supply monitoring with appropriate safety margin against ripple and drift.
Does the MAX6468XS46D3-T require an external pullup resistor on the RESET pin?
No, the MAX6468XS46D3-T does not require an external pullup resistor because it features a push-pull RESET output. Unlike open-drain variants (e.g., MAX6467), the MAX6468XS46D3-T actively drives both high and low states - sourcing up to 500µA at 0.8×VCC when high and sinking 1.2mA when low - eliminating the need for external components and simplifying interface design.
How does the manual reset (MR) input behave on the MAX6468XS46D3-T?
The MR input on the MAX6468XS46D3-T is edge-triggered: a falling edge initiates a fixed 150ms (min) one-shot RESET pulse, regardless of MR signal duration. It includes 150ms rising-edge debounce to ignore switch bounce, and an internal 1.5kΩ pullup to VCC allows direct connection of a momentary switch to GND without external biasing components.
What is the minimum supply voltage at which the MAX6468XS46D3-T guarantees valid RESET output operation?
The MAX6468XS46D3-T guarantees valid RESET output behavior down to VCC = +1V. Below this level, the internal circuitry cannot maintain specified timing or logic levels. This specification ensures reliable reset assertion during deep brownout conditions common in automotive stop-start systems and battery-powered equipment with aging cells.
Is the MAX6468XS46D3-T qualified for automotive applications?
Yes, the MAX6468XS46D3-T is specified over -40°C to +125°C and packaged in SC70-4, meeting automotive ambient temperature requirements. While the datasheet does not carry explicit AEC-Q100 certification notation, its temperature range, production testing, and qualification methodology align with automotive-grade reliability standards for non-safety-critical power monitoring functions.
MAX6468XS46D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V
- 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:
- SC-70-4
MAX6468XS46D3-T FAQ
1.How can I place an order for MAX6468XS46D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468XS46D3-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 MAX6468XS46D3-T reliable?
The price and inventory of MAX6468XS46D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468XS46D3-T is usually 5 days.
3.What payment methods are accepted for MAX6468XS46D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468XS46D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468XS46D3-T?
MAX6468XS46D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468XS46D3-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 MAX6468XS46D3-T?
For technical support, including MAX6468XS46D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468XS46D3-T requirements.
6.How does Aetrix verify that MAX6468XS46D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6468XS46D3-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 MAX6468XS46D3-T meets industry standards.
7.What is the process for return or replacement of MAX6468XS46D3-T?
All MAX6468XS46D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468XS46D3-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 MAX6468XS46D3-T part is unused and in its original packaging.
Return procedure for MAX6468XS46D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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