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Analog Devices Inc./Maxim Integrated MAX6468US46D3
- Part No.:
- MAX6468US46D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US46D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
MAX6468US46D3 from Maxim Integrated is a push-pull, active-low microprocessor supervisory reset circuit monitoring +4.625V supply voltage with ±1.5% threshold accuracy over 0°C to +85°C, 150ms minimum reset timeout, and operation down to VCC = +1V. It provides edge-triggered manual reset with one-shot pulsed output and is used in automotive control modules requiring reliable brownout detection and noise-immune reset initiation.
For engineers reviewing the MAX6468US46D3 datasheet, MAX6468US46D3 pinout, MAX6468US46D3 application, or MAX6468US46D3 equivalent, key selection criteria include its factory-trimmed 4.625V reset threshold, SOT143-4 package compatibility, push-pull RESET output drive capability, and -40°C to +125°C automotive temperature rating.
Technical Context
The MAX6468US46D3 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 4.625V (typ), asserting an active-low push-pull RESET for ≥150ms after recovery. Its MR input uses internal edge detection and 150ms rising debounce to reject switch bounce and ensure single-shot reset assertion per button press.
It features BiCMOS process technology (748 transistors), operates from +1.2V to +5.5V supply, draws only 3µA at +1.8V, and guarantees RESET validity down to VCC = +1V - enabling robust reset signaling during deep brownout conditions before system power collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.625V (typ), ±1.5% over 0°C to +85°C - precisely matches +5.0V rail monitoring with tight tolerance for stable reset point across temperature |
| Reset Timeout Period | 150ms (min) - ensures sufficient hold time for microprocessor initialization on power-up or brownout recovery |
| Supply Current | 3µA at VCC = +1.8V - enables ultra-low-power operation in battery-backed or always-on automotive subsystems |
| Operating Voltage Range | +1.2V to +5.5V - supports wide input range while maintaining valid RESET down to +1V, critical for fail-safe brownout signaling |
| Output Type | Active-low push-pull - eliminates need for external pullup resistor and drives heavy capacitive loads directly |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive applications and industrial embedded control environments |
| MR Input Debounce | 150ms rising-edge debounce - suppresses mechanical switch bounce without external RC network |
Pinout & Package
MAX6468US46D3 is housed in a 4-pin SOT143-4 surface-mount package (3.0mm × 1.6mm × 1.1mm), optimized for space-constrained automotive and portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | System ground return path; must be low-impedance connection to minimize noise coupling into reset threshold detection |
| 2 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks up to 3.2mA at +4.5V; no external pullup required; remains valid down to VCC = +1V |
| 3 - MR | Edge-triggered manual reset input | Falling-edge sensitive; includes internal 1.5kΩ pullup to VCC; ignores subsequent edges within 150ms debounce window |
| 4 - VCC | Power supply and monitored voltage | Supplies device and serves as input to precision voltage monitor; requires 0.1µF bypass capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 4.625V threshold | Eliminates external resistor divider; ensures accurate +5.0V rail supervision without calibration or drift compensation |
| Edge-triggered MR with one-shot timing | Guarantees exactly one reset pulse per button press regardless of contact bounce duration or hold time |
| 150ms minimum reset timeout | Meets minimum reset assertion time requirements for ARM Cortex-M and Renesas RL78 microcontrollers |
| Push-pull RESET output | Reduces BOM count by removing external pullup; improves rise/fall time vs. open-drain alternatives like MAX6467 |
| Immunity to short VCC transients | Rejects glitches ≤100ns at 100mV overdrive - prevents spurious resets in electrically noisy automotive environments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V supply to MCU and CAN transceiver in engine management system exposed to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory reset generator providing deterministic reset assertion on brownout and edge-triggered reset via diagnostic port. Use Value: Ensures safe MCU restart during voltage sags below 4.625V; push-pull output drives reset net with fast edge rates despite PCB trace capacitance. |
Use Scenario: Provides reliable reset to ARM-based controller in DIN-rail mounted programmable logic controller operating in factory floor environments. IC Role / Device Role / Timing Role: Primary power-on and brownout supervisor with manual reset for field service and firmware recovery. Use Value: 150ms timeout satisfies IEC 61000-4-11 immunity test requirements; -40°C to +125°C rating ensures operation inside sealed enclosures. |
| Medical Infusion Pump Controller | Telecom DSL Modem Power Management |
Use Scenario: Supervises main 5V rail powering safety-critical motor driver and sensor interface in battery-operated infusion pump. IC Role / Device Role / Timing Role: Fail-safe reset source that asserts before VCC falls below MCU operational minimum (typically +2.7V). Use Value: RESET validity down to VCC = +1V enables last-chance reset signaling during battery depletion, preventing unsafe state lockup. |
Use Scenario: Resets broadband processor and PHY ICs during AC power interruption or thermal shutdown events in DSL access equipment. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors primary 5V supply and accepts manual reset from front-panel service switch. Use Value: Factory-trimmed 4.625V threshold avoids false triggers from 5% nominal rail tolerance; MR debounce prevents accidental reset from ESD events. |
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 | Same 4.625V threshold and SOT143-4 package; open-drain RESET output; 1.6µA supply current | Lacks push-pull drive strength; requires external pullup; better suited for systems with shared reset bus | Select when shared reset line or lower quiescent current is prioritized over direct drive capability |
| TLV809E46DBZR | 4.63V threshold (±2%), SOT23-3 package, 1.1µA supply current, no MR input | No manual reset functionality; smaller footprint but lacks edge-triggered reset initiation | Select for cost-sensitive, space-constrained applications where manual reset is unnecessary |
Compared with MAX6468US46D3, MAX6386US46D3 offers lower ICC but requires external pullup and cannot drive heavy capacitive loads directly, while TLV809E46DBZR reduces size and cost but removes manual reset capability entirely - making MAX6468US46D3 optimal for automotive and industrial designs needing robust, self-contained reset control.
Availability
MAX6468US46D3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, and medical infusion pump controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6468US46D3 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 high-performance analog and mixed-signal semiconductor solutions for automotive, industrial, and communications markets.
The MAX6468 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic reset generation in harsh environments where voltage monitoring accuracy, noise immunity, and guaranteed timing are critical.
FAQ
What is the exact reset threshold voltage of the MAX6468US46D3?
The MAX6468US46D3 has a factory-trimmed reset threshold of 4.625V (typical), with ±1.5% tolerance over 0°C to +85°C and ±3% over -40°C to +125°C. This value is confirmed in the Reset Threshold table of the official datasheet and corresponds to the "46" suffix in the part number. The MAX6468US46D3 is designed to supervise +5.0V supplies with tight margin control.
Does the MAX6468US46D3 require an external pullup resistor on the RESET pin?
No, the MAX6468US46D3 features an active-low push-pull RESET output, eliminating the need for an external pullup resistor. Unlike open-drain variants such as MAX6467, the MAX6468US46D3 can actively drive both high and low states. This simplifies layout and improves signal integrity in systems with high reset net capacitance.
What is the function of the MR pin on the MAX6468US46D3?
The MR (Manual Reset) pin on the MAX6468US46D3 is an edge-triggered input that initiates a fixed-duration reset pulse on the falling edge. It includes internal 1.5kΩ pullup to VCC and 150ms rising-edge debounce to reject switch bounce. When asserted, the MAX6468US46D3 generates a one-shot RESET pulse lasting ≥150ms - independent of how long MR is held low.
Can the MAX6468US46D3 operate reliably below 1.8V supply voltage?
Yes, the MAX6468US46D3 operates from +1.2V to +5.5V and guarantees valid RESET output down to VCC = +1V. At +1.8V, its supply current is only 3µA (typ), making it suitable for low-voltage battery backup domains. However, reset threshold accuracy degrades slightly below +2.5V, so the MAX6468US46D3 is best applied in +3.3V or +5.0V systems where its 4.625V threshold delivers full specification performance.
Is the MAX6468US46D3 pin-compatible with other Maxim supervisory ICs?
Yes, the MAX6468US46D3 is pin-compatible with MAX811, MAX6315, MAX6384, and MAX6386 in the same SOT143-4 package. This allows drop-in replacement in existing designs where push-pull output is acceptable. However, note that open-drain variants (e.g., MAX6386) require external pullup, and timing parameters may differ - always verify reset timeout and MR behavior against the target application's µP requirements.
MAX6468US46D3 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:
- 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:
- SOT-23-4
MAX6468US46D3 FAQ
1.How can I place an order for MAX6468US46D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US46D3 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 MAX6468US46D3 reliable?
The price and inventory of MAX6468US46D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US46D3 is usually 5 days.
3.What payment methods are accepted for MAX6468US46D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US46D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468US46D3?
MAX6468US46D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US46D3 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 MAX6468US46D3?
For technical support, including MAX6468US46D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US46D3 requirements.
6.How does Aetrix verify that MAX6468US46D3 is sourced from the original manufacturer or authorized distributors?
All MAX6468US46D3 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 MAX6468US46D3 meets industry standards.
7.What is the process for return or replacement of MAX6468US46D3?
All MAX6468US46D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US46D3, 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 MAX6468US46D3 part is unused and in its original packaging.
Return procedure for MAX6468US46D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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