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Analog Devices Inc./Maxim Integrated MAX6468XS18D3+T
- Part No.:
- MAX6468XS18D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6468XS18D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,398
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Product details
Overview
MAX6468XS18D3+T from Analog Devices is a push-pull output microprocessor supervisory reset circuit monitoring +1.8V supply voltage with factory-trimmed 1.755V/1.800V/1.845V threshold, 150ms minimum reset timeout, edge-triggered manual reset, and operation over -40°C to +125°C. It ensures reliable µP reset during brownout and power-up in automotive and industrial embedded systems.
For engineers reviewing the MAX6468XS18D3+T datasheet, MAX6468XS18D3+T pinout, MAX6468XS18D3+T application, or MAX6468XS18D3+T equivalent, key selection criteria include its push-pull RESET output drive capability, 3µA supply current at 1.8V, VCC-valid-to-1V operation, and AEC-Q100-qualified automotive temperature range.
Technical Context
The MAX6468XS18D3+T implements a precision bandgap-based voltage monitor with ±1.5% threshold accuracy at +25°C and ±3% over -40°C to +125°C. Its internal one-shot timer generates fixed 150ms (min) reset pulses on both VCC dropout and MR falling-edge assertion.
It features an integrated 1.5kΩ MR pullup resistor, glitch rejection of 100ns transients, and MR debounce timing of 150ms (min). The push-pull RESET output drives high to 0.8×VCC at 500µA load and low to 0.3V at 1.2mA sink, eliminating external pullup requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.755V (min), 1.800V (typ), 1.845V (max) - precisely monitors +1.8V rail with ±2.5% tolerance over -40°C to +85°C |
| Reset Timeout Period | 150ms (min), 225ms (typ), 300ms (max) - guarantees sufficient µP reset hold time for ARM Cortex-M and similar MCUs |
| Supply Current | 3µA at VCC = +1.8V - enables ultra-low-power operation in battery-backed systems |
| Operating Voltage Range | +1.0V to +5.5V - supports valid RESET output down to VCC = +1V, critical for graceful shutdown sequencing |
| Output Type | Active-low push-pull - eliminates need for external pullup resistor, simplifies PCB layout and reduces BOM count |
| Temperature Range | -40°C to +125°C - AEC-Q100 qualified for under-hood automotive and harsh industrial environments |
| MR Input Logic | TTL/CMOS-compatible with 0.3×VCC VIH/0.7×VCC VIL thresholds - interfaces directly with FPGA I/O and MCU GPIO without level shifters |
Pinout & Package
MAX6468XS18D3+T is housed in a 4-pin SC70 package (outline 21-0098), footprint code X4+1, measuring 2.0mm × 2.1mm × 0.9mm. This ultra-small outline enables placement in space-constrained portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal bias and RESET output sink current; requires low-impedance connection to system ground plane |
| 2 RESET | Active-low reset output | Push-pull driver capable of sourcing 500µA and sinking 1.2mA; asserts low during VCC dropout or MR falling edge |
| 3 MR | Manual reset input | Edge-triggered input with internal 1.5kΩ pullup to VCC; accepts momentary switch to GND; ignores bounce within 150ms debounce window |
| 4 VCC | Power and monitored supply | Supplies device core and serves as monitored voltage rail; bypass with 0.1µF capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.8V threshold | Eliminates external resistor divider and calibration, reducing design cycle time and component count |
| Edge-triggered MR with one-shot timing | Ensures single, deterministic reset pulse per button press regardless of contact bounce duration or hold time |
| Push-pull RESET output | Removes dependency on external pullup resistors, enabling direct interface to µP reset pins with defined logic levels |
| 150ms minimum reset timeout | Meets JEDEC JESD78 requirement for minimum reset assertion time across common microcontroller families |
| VCC-valid-to-1V operation | Guarantees clean reset deassertion during brownout recovery, preventing spurious µP startup before stable supply |
Applications
| Automotive Body Control Module | Industrial PLC I/O Card |
|---|---|
|
Use Scenario: Monitors 1.8V core supply for CAN controller and sensor interface ASIC in body ECU. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET to microcontroller and peripheral ICs during supply sag. Use Value: Prevents firmware corruption during engine cranking-induced voltage dip by holding reset for ≥150ms until 1.8V rail stabilizes. |
Use Scenario: Provides power-on and brownout reset for ARM-based programmable logic controller CPU board. IC Role / Device Role / Timing Role: Voltage monitor and reset sequencer ensuring deterministic boot state after AC/DC converter transient events. Use Value: Enables reliable restart after 120ms line dropout using 150ms timeout, exceeding IEC 61000-4-11 immunity requirements. |
| Medical Patient Monitor SoM | Automotive ADAS Camera Module |
|
Use Scenario: Supervises dual 1.8V rails powering imaging processor and wireless telemetry subsystem. IC Role / Device Role / Timing Role: Dual-rail supervisor (using two devices) delivering synchronized reset signals with precise 1.8V threshold matching. Use Value: Ensures coordinated reset of safety-critical imaging pipeline and BLE radio, meeting ISO 13485 functional safety timing constraints. |
Use Scenario: Monitors 1.8V digital supply for image signal processor in rear-view camera module. IC Role / Device Role / Timing Role: Automotive-grade reset supervisor with AEC-Q100 qualification and -40°C to +125°C operation. Use Value: Guarantees robust reset behavior during thermal cycling and cold-cranking, supporting ASIL-B system-level compliance. |
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+T | Open-drain output, same 1.8V threshold and 150ms timeout, but requires external pullup resistor | Lacks push-pull drive; unsuitable where µP reset pin has no internal pullup or demands defined high-state voltage | Select when board already uses open-drain supervisors and external pullup exists; avoid if minimizing passive count is critical |
| TPS3808G18DBVR | Push-pull output, 1.8V threshold, but 200ms min timeout and higher 8µA quiescent current at 1.8V | Longer timeout may delay system boot; higher current impacts battery life in always-on sensing nodes | Prefer for TI-centric designs with existing TPS3808 footprint; choose MAX6468XS18D3+T for tighter timeout control and lower power |
Compared with MAX6468XS18D3+T, MAX6384US29D3+T requires external pullup and lacks guaranteed VCC=1V operation, while TPS3808G18DBVR consumes 2.7× more current and delays reset release by 50ms-making MAX6468XS18D3+T optimal for space-, power-, and timing-sensitive automotive and portable designs.
Availability
MAX6468XS18D3+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical imaging subsystems, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6468XS18D3+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX6467/MAX6468 family was designed specifically for automotive and industrial microprocessor supervision, emphasizing AEC-Q100 qualification, ultra-low quiescent current, and deterministic edge-triggered reset timing.
FAQ
What is the exact reset threshold voltage range for MAX6468XS18D3+T?
The MAX6468XS18D3+T has a factory-trimmed reset threshold of 1.755V (minimum), 1.800V (typical), and 1.845V (maximum) at +25°C. Over the full -40°C to +85°C range, the tolerance expands to ±2.5%, and up to ±3% from +85°C to +125°C. This precision eliminates need for external calibration components and ensures accurate monitoring of +1.8V supplies in automotive and industrial applications.
Does MAX6468XS18D3+T require an external pullup resistor on the RESET pin?
No, MAX6468XS18D3+T does not require an external pullup resistor because it features a push-pull RESET output. Unlike open-drain variants (e.g., MAX6467), the MAX6468 actively drives both high and low states-sourcing up to 500µA at 0.8×VCC and sinking up to 1.2mA at 0.3V. This simplifies schematic design and reduces BOM cost compared to open-drain alternatives like MAX6467XS18D3+T.
What is the MR input behavior during switch bounce, and how does MAX6468XS18D3+T handle it?
MAX6468XS18D3+T incorporates built-in MR debounce with a 150ms (minimum) rising-edge debounce period (tDEB). After MR transitions from low to high, subsequent falling edges within this window are ignored-ensuring only one reset pulse per button press. This eliminates need for external RC filters or firmware debouncing, making MAX6468XS18D3+T ideal for mechanical switch interfaces in automotive and industrial controls.
Can MAX6468XS18D3+T operate reliably when VCC drops below 1.8V but remains above 1.0V?
Yes, MAX6468XS18D3+T guarantees valid RESET output operation down to VCC = +1.0V. Its internal circuitry remains functional and asserts or deasserts RESET correctly even as the supply decays from 1.8V to 1.0V. This feature ensures safe, predictable microprocessor reset behavior during brownout conditions-critical for automotive and medical systems where partial supply collapse must trigger controlled shutdown.
Is MAX6468XS18D3+T qualified for automotive applications, and what standards does it meet?
Yes, MAX6468XS18D3+T is AEC-Q100 qualified for automotive use and specified over the full -40°C to +125°C temperature range. It meets stringent automotive reliability requirements including HTOL, TC, and ESD testing. The "/V" suffix denotes automotive qualification, and the "+T" indicates RoHS-compliant, lead-free packaging-making MAX6468XS18D3+T suitable for under-hood and cabin ECUs requiring long-term reliability and regulatory compliance.
MAX6468XS18D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6468XS18D3+T FAQ
1.How can I place an order for MAX6468XS18D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468XS18D3+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 MAX6468XS18D3+T reliable?
The price and inventory of MAX6468XS18D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468XS18D3+T is usually 5 days.
3.What payment methods are accepted for MAX6468XS18D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468XS18D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468XS18D3+T?
MAX6468XS18D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468XS18D3+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 MAX6468XS18D3+T?
For technical support, including MAX6468XS18D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468XS18D3+T requirements.
6.How does Aetrix verify that MAX6468XS18D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6468XS18D3+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 MAX6468XS18D3+T meets industry standards.
7.What is the process for return or replacement of MAX6468XS18D3+T?
All MAX6468XS18D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468XS18D3+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 MAX6468XS18D3+T part is unused and in its original packaging.
Return procedure for MAX6468XS18D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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