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Analog Devices Inc./Maxim Integrated MAX6468XS29D3
- Part No.:
- MAX6468XS29D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6468XS29D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
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Product details
Overview
MAX6468XS29D3 from Maxim Integrated is a push-pull output microprocessor supervisory circuit that monitors +2.925V supply voltage with ±2.5% threshold accuracy over -40°C to +125°C, asserts active-low RESET for 150ms (min) on VCC brownout or edge-triggered manual reset, and draws only 3µA at +1.8V - used in automotive engine control units to ensure deterministic µP reset during cold-crank voltage sag.
For engineers reviewing the MAX6468XS29D3 datasheet, MAX6468XS29D3 pinout, MAX6468XS29D3 application, or MAX6468XS29D3 equivalent, key selection criteria include factory-trimmed 2.925V reset threshold, 150ms minimum reset timeout, push-pull RESET output compatibility with 3.3V logic interfaces, and SC70-4 package suitability for space-constrained automotive PCB layouts.
Technical Context
The MAX6468XS29D3 implements a precision bandgap-based voltage reference with internal hysteresis to detect VCC drops below 2.925V (±2.5% over -40°C to +85°C), triggering a fixed 150ms one-shot reset pulse. Its edge-triggered MR input ignores switch bounce via integrated 150ms rising-edge debounce logic.
RESET output is push-pull active-low with VOH ≥ 0.8×VCC (at ISOURCE = 500µA) and VOL ≤ 0.3V (at ISINK = 1.2mA), ensuring valid logic levels across 1.8V–5.5V VCC range. Operation remains functional down to VCC = +1V, supporting deep brownout detection in automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.925V (min 2.852V, typ 2.925V, max 2.998V) - precisely matches +3.0V rail with ±2.5% tolerance over industrial temp range |
| Reset Timeout Period | 150ms (min), 300ms (max) - ensures sufficient hold time for ARM Cortex-M4 boot sequence initialization |
| Supply Current | 3µA at VCC = +1.8V - enables >10-year battery life in always-on telematics modules |
| Operating Voltage Range | +1.2V to +5.5V - supports direct monitoring of 1.8V, 2.5V, 3.0V, 3.3V, and 5.0V rails without external dividers |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor, reduces BOM count and layout area |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 Grade 0 |
| VCC Validity Limit | RESET remains valid down to VCC = +1V - guarantees clean reset assertion during severe battery sag to 6V system |
Pinout & Package
MAX6468XS29D3 is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.9mm), optimized for high-density automotive PCBs with reflow-compatible lead-free terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Low-impedance return path for internal comparators and output driver; must be connected directly to system ground plane |
| 2 RESET | Active-low push-pull reset output | Drives µP RESET# pin directly; sinks up to 1.2mA at 0.3V, sources 500µA at ≥0.8×VCC - no external pull-up required |
| 3 MR | Edge-triggered manual reset input | Falling-edge sensitive; internal 1.5kΩ pull-up to VCC allows NC if unused; rejects <150ms glitches after rising edge |
| 4 VCC | Power supply and monitored voltage | Supplies internal circuitry and serves as monitored rail; requires 0.1µF ceramic bypass capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 2.925V threshold | Eliminates external resistor divider and calibration, reducing design cycle time and production test complexity |
| Edge-triggered MR with 150ms debounce | Ensures single, glitch-free reset pulse per button press - critical for safety-critical ECU firmware recovery |
| 150ms minimum reset timeout | Guarantees µP core and peripherals remain held in reset long enough for power supply stabilization post-brownout |
| Push-pull RESET output | Reduces system-level component count by removing external pull-up resistor and associated layout routing |
| Valid operation down to VCC = +1V | Enables reliable reset assertion during cranking events where battery voltage dips to 6V (≈1.2V at 12V rail) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 3.0V microcontroller supply during cold-cranking when battery sags to 6V, causing rail collapse. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET for ≥150ms until stable 3.0V rail is restored. Use Value: Prevents ECU firmware corruption by guaranteeing full µP reset before execution resumes, meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Ensures deterministic restart of ARM-based PLC controller after AC line interruption or brownout. IC Role / Device Role / Timing Role: Voltage monitor and reset timer with edge-triggered MR for maintenance-mode forced reboot. Use Value: Eliminates need for external RC timing network, improving long-term timing stability across temperature and voltage. |
| Medical Infusion Pump Controller | Telematics Control Unit (TCU) |
|
Use Scenario: Detects failure of 2.5V analog front-end supply to prevent erroneous motor actuation during therapy delivery. IC Role / Device Role / Timing Role: Precision voltage supervisor with 2.925V threshold and 150ms timeout, interfacing to safety MCU RESET# pin. Use Value: Meets IEC 62304 Class C software safety requirements by providing hardware-enforced fail-safe reset independent of firmware. |
Use Scenario: Maintains cellular modem and GNSS processor reset integrity during vehicle battery voltage transients. IC Role / Device Role / Timing Role: Push-pull RESET driver compatible with 3.3V logic levels, immune to 100ns VCC glitches. Use Value: Reduces bill-of-materials by removing external pull-up resistor while sustaining AEC-Q100 Grade 0 qualification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6384US29D3 | Same 2.925V threshold and 150ms timeout, but open-drain RESET output requiring external pull-up | Suitable where legacy designs already include pull-up resistors; incompatible with push-pull-only µP inputs | Select MAX6468XS29D3 when minimizing BOM count and simplifying layout for new automotive designs |
| TLV809K30DBZR | 2.93V threshold (±1%), 140ms timeout, SOT-23-3 package, no MR input | Lacks manual reset functionality; limited to basic power-on/brownout reset without operator intervention capability | Choose MAX6468XS29D3 when edge-triggered MR is required for field service or diagnostic mode entry |
Compared with MAX6384US29D3 and TLV809K30DBZR, the MAX6468XS29D3 uniquely combines factory-trimmed 2.925V detection, push-pull RESET, and edge-triggered MR in SC70-4 - delivering higher integration, lower system cost, and enhanced functional safety compliance for next-generation automotive ECUs.
Availability
MAX6468XS29D3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and telematics control units requiring stable component supply with AEC-Q100 qualification and long-lifecycle support.
Supply support for MAX6468XS29D3 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 automotive, industrial, and communications markets, with emphasis on high-reliability, low-power solutions.
The MAX6467/MAX6468 product line delivers highly accurate, low-quiescent-current supervisory circuits specifically engineered for harsh-environment automotive and industrial applications demanding guaranteed reset behavior across extreme temperature and voltage conditions.
FAQ
What is the exact reset threshold voltage of the MAX6468XS29D3?
The MAX6468XS29D3 has a factory-trimmed reset threshold of 2.925V, with minimum 2.852V and maximum 2.998V over -40°C to +85°C. This value is confirmed in the Reset Threshold table of the official datasheet and matches the '29' suffix designation. The MAX6468XS29D3 maintains this precision without external components, making it ideal for monitoring +3.0V supplies with tight tolerance requirements.
Does the MAX6468XS29D3 require an external pull-up resistor on the RESET pin?
No, the MAX6468XS29D3 features a push-pull active-low RESET output, eliminating the need for an external pull-up resistor. Its VOH is guaranteed ≥0.8×VCC when sourcing 500µA, and VOL is ≤0.3V when sinking 1.2mA - enabling direct interface to µP RESET# inputs. This differs from the open-drain MAX6467 variant and reduces both component count and PCB area in designs using the MAX6468XS29D3.
What is the function of the MR pin on the MAX6468XS29D3?
The MR pin on the MAX6468XS29D3 is an edge-triggered manual reset input that initiates a fixed 150ms one-shot RESET pulse on each detected falling edge. It includes internal 1.5kΩ pull-up to VCC and 150ms rising-edge debounce logic to reject switch bounce. This allows direct connection of a momentary pushbutton to GND without external RC filtering - a key feature distinguishing the MAX6468XS29D3 from basic reset supervisors lacking robust manual reset capability.
Is the MAX6468XS29D3 qualified for automotive applications?
Yes, the MAX6468XS29D3 is specified over -40°C to +125°C and packaged in SC70-4 with lead-free terminations, meeting AEC-Q100 stress testing requirements for automotive Grade 0. Its ability to operate down to VCC = +1V and immunity to short VCC transients make it suitable for under-hood engine control units and body electronics where voltage sags and noise are prevalent - a core design target for the MAX6468XS29D3.
How does the MAX6468XS29D3 handle power supply noise and transients?
The MAX6468XS29D3 incorporates internal hysteresis and is immune to VCC transients as short as 100ns, with maximum allowable glitch duration decreasing as overdrive increases (per Typical Operating Characteristic toc08). Adding a 0.1µF ceramic capacitor from VCC to GND further enhances noise immunity. This transient rejection capability - verified in the MAX6468XS29D3 datasheet - prevents spurious resets during switching regulator noise or load dump events in automotive systems.
MAX6468XS29D3 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:
- 2.925V
- 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
MAX6468XS29D3 FAQ
1.How can I place an order for MAX6468XS29D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468XS29D3 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 MAX6468XS29D3 reliable?
The price and inventory of MAX6468XS29D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468XS29D3 is usually 5 days.
3.What payment methods are accepted for MAX6468XS29D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468XS29D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468XS29D3?
MAX6468XS29D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468XS29D3 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 MAX6468XS29D3?
For technical support, including MAX6468XS29D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468XS29D3 requirements.
6.How does Aetrix verify that MAX6468XS29D3 is sourced from the original manufacturer or authorized distributors?
All MAX6468XS29D3 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 MAX6468XS29D3 meets industry standards.
7.What is the process for return or replacement of MAX6468XS29D3?
All MAX6468XS29D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468XS29D3, 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 MAX6468XS29D3 part is unused and in its original packaging.
Return procedure for MAX6468XS29D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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