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Analog Devices Inc./Maxim Integrated MAX6468XS18D3+
- Part No.:
- MAX6468XS18D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6468XS18D3+.pdf
- Description:
- MICROPROCESSOR SUPERVISORY RESET
- Quantity:
- Payment:
- Shipping:
Inventory:966
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Product details
Overview
MAX6468XS18D3+ from Maxim Integrated is a push-pull, active-low microprocessor supervisory reset circuit monitoring +1.8V supply with factory-trimmed 1.755V/1.800V/1.845V threshold (–40°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 and industrial embedded systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6468XS18D3+ datasheet, MAX6468XS18D3+ pinout, MAX6468XS18D3+ application, or MAX6468XS18D3+ equivalent, this page delivers verified electrical parameters, SC70-4 package details, reset timing behavior, MR debounce characteristics, and validated alternatives for system-level reliability design.
Technical Context
The MAX6468XS18D3+ implements a precision bandgap-based voltage monitor with ±1.5% threshold accuracy at +25°C and ±2.5% over –40°C to +85°C, coupled to a digital one-shot timer for both VCC-initiated and MR-initiated reset assertion. Its push-pull RESET output drives low without external pull-up, enabling direct interface to µP reset inputs.
It features internal MR pull-up (1.5kΩ to VCC), 150ms MR rising debounce period, 200ns MR-to-RESET propagation delay, and immunity to transients ≤100ns - all operating across –40°C to +125°C with supply current as low as 3µA at VCC = +1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.755V (min) / 1.800V (typ) / 1.845V (max) at –40°C to +85°C - ensures reliable detection of +1.8V supply brownout before µP malfunction. |
| VCC Operating Range | +1.2V to +5.5V - supports operation during deep brownout while maintaining valid RESET down to +1V. |
| Reset Timeout Period | 150ms (min) / 225ms (typ) / 300ms (max) - guarantees sufficient µP reset hold time for ARM Cortex-M and similar processors. |
| Supply Current | 3µA (min) / 7.5µA (max) at VCC = +1.8V - enables ultra-low-power battery-backed monitoring in portable equipment. |
| MR Input Compatibility | TTL/CMOS logic levels; internal 1.5kΩ pull-up to VCC - eliminates need for external pull-up and simplifies switch interface. |
| RESET Output Type | Active-low push-pull - drives reset line directly without external pull-up resistor, reducing BOM count and layout area. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial control applications. |
Pinout & Package
MAX6468XS18D3+ is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained PCBs in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal biasing and RESET output sink current; must be low-impedance connection to system ground plane. |
| 2 RESET | Active-low push-pull reset output | Drives µP reset input low during VCC brownout or MR edge; no external pull-up required; sinks up to 3.2mA at VCC ≥ +4.5V. |
| 3 MR | Edge-triggered manual reset input | Falling-edge sensitive; internally pulled up to VCC (1.5kΩ); ignores bounce within 150ms debounce window after rising edge. |
| 4 VCC | Power and monitored supply input | Supplies device and serves as monitored rail; requires 0.1µF bypass capacitor to GND for noise immunity and transient rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 1.8V threshold | ±1.5% tolerance at +25°C enables accurate reset assertion without calibration or trimming components. |
| Edge-triggered MR with one-shot timing | Guarantees single, fixed-duration RESET pulse per button press - prevents repeated resets from switch bounce or noisy signals. |
| Push-pull RESET output | Eliminates need for external pull-up resistor, reducing component count and improving rise/fall time consistency in high-noise environments. |
| Valid RESET down to VCC = +1V | Ensures clean reset deassertion even during deep brownout recovery, preventing µP lockup or undefined state on power restoration. |
| 100ns glitch immunity on MR | Rejects EMI-induced spikes on manual reset line, avoiding spurious resets in electrically noisy automotive or industrial settings. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Card |
|---|---|
|
Use Scenario: Monitors 1.8V core supply for MCU in door module controlling window lift, mirror adjustment, and lighting functions. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET to ARM Cortex-M0+ during cold-crank brownout or load-dump recovery. Use Value: Prevents MCU firmware corruption by guaranteeing ≥150ms reset hold time while operating across –40°C to +125°C ambient. |
Use Scenario: Provides power-on and brownout reset for FPGA-configured I/O controller in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Voltage monitor and edge-triggered manual reset initiator with push-pull output driving FPGA PROG_B and processor nRST lines. Use Value: Enables deterministic startup and field-service reset without external pull-ups or RC networks, reducing board area by 12 mm². |
| Medical Patient Monitor Sensor Node | DSL Modem Power Management Unit |
|
Use Scenario: Ensures safe boot sequence for low-power sensor hub MCU powered from isolated 1.8V LDO in battery-operated vital sign recorder. IC Role / Device Role / Timing Role: Reset supervisor with ultra-low 3µA quiescent current and valid RESET down to VCC = +1V for graceful shutdown during battery depletion. Use Value: Extends usable battery life by >18 months in standby mode while maintaining guaranteed reset integrity at end-of-discharge. |
Use Scenario: Monitors 1.8V PHY interface supply in DSL transceiver ASIC subsystem subjected to AC-line induced transients. IC Role / Device Role / Timing Role: Immune reset generator rejecting <100ns noise spikes on VCC and MR, preventing false resets during line surges. Use Value: Improves modem uptime by eliminating transient-induced reboots, meeting ITU-T G.992.1 robustness requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6384US29D3+ | Same SC70-4 package, 2.852V/2.925V/2.998V threshold, 150ms timeout, open-drain RESET output. | Requires external pull-up resistor; suited for systems where RESET line shares bus with multiple devices. | Select when shared reset bus architecture is used and 2.925V threshold matches 3.0V supply monitoring. |
| TPS3808G18DBVR | Push-pull RESET, 1.8V threshold (±0.5%), 200ms timeout, 1.4µA IQ, SOT-23-5 package with watchdog enable pin. | Includes watchdog timer not present in MAX6468XS18D3+; larger footprint and extra pin for enhanced supervision. | Select when watchdog functionality is required alongside reset supervision, accepting SOT-23-5 layout impact. |
Compared with MAX6468XS18D3+, MAX6384US29D3+ offers identical timing but requires external pull-up and targets higher supply rails, while TPS3808G18DBVR adds watchdog capability at lower quiescent current but increases pin count and board area.
Availability
MAX6468XS18D3+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical sensor nodes, and DSL modem power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6468XS18D3+ 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 MAX6467/MAX6468 product line delivers highly accurate, low-power supervisory circuits with factory-trimmed thresholds and robust manual reset handling - engineered specifically for mission-critical embedded systems where power integrity is non-negotiable.
FAQ
What is the exact reset threshold voltage range for MAX6468XS18D3+?
The MAX6468XS18D3+ has a factory-trimmed reset threshold of 1.755V (minimum), 1.800V (typical), and 1.845V (maximum) over the –40°C to +85°C temperature range, as specified in the Reset Threshold table of the official datasheet. This precise 1.8V monitoring window ensures compatibility with modern low-voltage microcontrollers and FPGAs without external calibration.
Does MAX6468XS18D3+ require an external pull-up resistor on the RESET pin?
No, MAX6468XS18D3+ does not require an external pull-up resistor because it features a push-pull RESET output. Unlike the open-drain MAX6467 variant, the MAX6468XS18D3+ actively drives the RESET line high when deasserted, simplifying schematic design and improving noise immunity in dense PCB layouts.
What is the MR debounce behavior of MAX6468XS18D3+?
The MAX6468XS18D3+ implements a 150ms (minimum) MR rising debounce period: after MR transitions from low to high, subsequent falling edges are ignored for 150ms to prevent false resets caused by mechanical switch bounce. This built-in timing eliminates the need for external RC filtering or firmware debouncing logic.
Can MAX6468XS18D3+ operate reliably below 1.8V supply?
Yes, MAX6468XS18D3+ operates down to VCC = +1.2V over full temperature range and guarantees valid RESET output down to VCC = +1V. Its internal circuitry remains functional during deep brownout, ensuring the µP receives a clean, timed reset signal even as the supply collapses - critical for fail-safe embedded systems.
What package type and dimensions does MAX6468XS18D3+ use?
MAX6468XS18D3+ uses the SC70-4 package (2.0mm × 2.1mm × 0.9mm body size), a space-saving surface-mount outline compatible with standard reflow processes. Pin 1 is marked by a dot, and the pinout is GND–RESET–MR–VCC in top-view orientation, matching JEDEC MO-203AA specifications.
MAX6468XS18D3+ 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:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.8V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6468XS18D3+ FAQ
1.How can I place an order for MAX6468XS18D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468XS18D3+ 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 MAX6468XS18D3+ reliable?
The price and inventory of MAX6468XS18D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468XS18D3+ is usually 5 days.
3.What payment methods are accepted for MAX6468XS18D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468XS18D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468XS18D3+?
MAX6468XS18D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468XS18D3+ 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 MAX6468XS18D3+?
For technical support, including MAX6468XS18D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468XS18D3+ requirements.
6.How does Aetrix verify that MAX6468XS18D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6468XS18D3+ 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 MAX6468XS18D3+ meets industry standards.
7.What is the process for return or replacement of MAX6468XS18D3+?
All MAX6468XS18D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468XS18D3+, 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 MAX6468XS18D3+ part is unused and in its original packaging.
Return procedure for MAX6468XS18D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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