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Analog Devices Inc./Maxim Integrated MAX6468XS26D3+
- Part No.:
- MAX6468XS26D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6468XS26D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:626
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Product details
Overview
The MAX6468XS26D3+ from Maxim Integrated is a push-pull output microprocessor supervisory reset circuit in SC70-4 package, monitoring +2.625V supply with ±1.5% threshold accuracy at +25°C, 150ms minimum reset timeout, and guaranteed operation down to VCC = +1V. It provides edge-triggered manual reset with 150ms debounce and is AEC-Q100 qualified for automotive applications.
For engineers reviewing the MAX6468XS26D3+ datasheet, MAX6468XS26D3+ pinout, MAX6468XS26D3+ application, or MAX6468XS26D3+ equivalent, key selection criteria include its factory-trimmed 2.625V reset threshold, push-pull active-low RESET output, -40°C to +125°C automotive temperature range, and immunity to short voltage transients.
Technical Context
The MAX6468XS26D3+ implements a precision bandgap-based voltage monitor with internal hysteresis and a digital one-shot timer for both power-fail and manual reset events. Its reset assertion logic combines analog threshold detection with edge-sensitive digital timing control to ensure deterministic reset pulse width regardless of MR input duration.
It features an internal 1.5kΩ pullup resistor on MR, supports TTL/CMOS-level inputs, and guarantees valid RESET output down to VCC = +1V. The push-pull output drives high (0.8×VCC) and low (≤0.3V at 1.2mA sink) without requiring external pullup components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | +2.625V (factory-trimmed, ±1.5% at +25°C; ±3% over -40°C to +125°C) |
| Reset Timeout Period | 150ms min (D3 suffix), fixed one-shot duration independent of VCC rise time |
| Supply Voltage Range | +1.0V to +5.5V - enables use with 1.8V, 2.5V, 3.3V, and 5.0V systems |
| Supply Current | 3µA at VCC = +1.8V - ultra-low quiescent current for battery-powered equipment |
| Operating Temperature | -40°C to +125°C - AEC-Q100 qualified for under-hood automotive environments |
| Output Type | Active-low push-pull - eliminates need for external pullup resistor; sinks 1.2mA at VCC ≥ +2.5V |
| MR Input Behavior | Edge-triggered with 150ms rising-edge debounce - rejects switch bounce and ensures single reset per press |
Pinout & Package
MAX6468XS26D3+ is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for space-constrained portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal circuitry and RESET output; requires low-impedance connection to system ground plane |
| 2 RESET | Active-low reset output | Push-pull driver asserts low during VCC brownout or MR falling edge; holds low for full 150ms timeout even if MR remains low |
| 3 MR | Manual reset input | Edge-triggered input with internal 1.5kΩ pullup; falling edge initiates one-shot reset; ignores subsequent edges within 150ms debounce window |
| 4 VCC | Power and monitored supply | Supplies device and serves as monitored rail; bypass with 0.1µF capacitor to GND for noise immunity and transient rejection |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set threshold | +2.625V threshold trimmed at wafer level - eliminates calibration and external resistors in +2.5V/2.6V supply monitoring |
| Edge-triggered manual reset | One-shot pulsed RESET output on MR falling edge - prevents latch-up or repeated resets from sustained button press |
| Glitch-immune voltage monitoring | Rejects transients ≤100ns at 100mV overdrive - avoids false resets during digital switching noise or ESD events |
| Low-voltage operation | Valid RESET output down to VCC = +1V - ensures reliable reset assertion during deep brownout conditions before system collapse |
| Automotive qualification | AEC-Q100 Grade 0 compliant (-40°C to +125°C) - validated for engine control, ADAS, and infotainment modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 2.5V microcontroller supply in engine management system exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Supervisory reset circuit asserting active-low RESET to MCU during brownout or manual service reset. Use Value: Factory-trimmed +2.625V threshold matches nominal 2.5V rail tolerance; 150ms timeout satisfies ISO 16750-2 cold-crank reset requirements. |
Use Scenario: Ensures deterministic restart of programmable logic controller after power interruption or field maintenance. IC Role / Device Role / Timing Role: System-level reset supervisor coordinating power sequencing and firmware recovery across multiple I/O ASICs. Use Value: Push-pull output drives RESET bus directly without pullup; -40°C to +125°C rating supports uncooled industrial enclosures. |
| Medical Infusion Pump Controller | DSL Modem Power Management |
Use Scenario: Guarantees safe shutdown and restart of safety-critical pump motor controller during battery voltage sag. IC Role / Device Role / Timing Role: Fail-safe reset generator interfacing with ARM Cortex-M4 MCU and isolated power rails. Use Value: 3µA supply current extends battery life; RESET validity to VCC = +1V prevents premature release during undervoltage recovery. |
Use Scenario: Manages reset timing for DSL PHY and baseband processor during AC power cycling and line surge events. IC Role / Device Role / Timing Role: Dual-role supervisor handling both VCC brownout and front-panel reset button input. Use Value: Edge-triggered MR with 150ms debounce eliminates false triggers from EMI on long front-panel cables; SC70 package saves board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6384US26D3+ | Same SC70-4 package, identical +2.625V threshold and D3 timeout, but open-drain output (requires external pullup) | Suitable where system already uses pullup on shared RESET bus; not drop-in for push-pull designs | Select MAX6384US26D3+ only if open-drain compatibility is required and pullup resistor is available |
| TLV809E26DBZR | TI part in SOT-23-3; +2.63V threshold, 140ms timeout, 1.8–6V VCC range; no MR input | Lacks manual reset functionality; intended for simple power-on reset only | Choose TLV809E26DBZR only when manual reset is unnecessary and board layout allows SOT-23-3 footprint |
Compared with MAX6468XS26D3+, MAX6384US26D3+ offers identical threshold and timing but requires external pullup, while TLV809E26DBZR omits MR entirely - making MAX6468XS26D3+ the only option supporting both precise 2.625V monitoring and robust edge-triggered manual reset in SC70.
Availability
MAX6468XS26D3+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pumps, DSL modems, and GPS navigation systems requiring stable component supply across extended temperature ranges.
Supply support for MAX6468XS26D3+ 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 ICs for demanding industrial, automotive, and communications applications.
The MAX6467/MAX6468 family delivers automotive-grade supervisory circuits with factory-trimmed thresholds and edge-triggered manual reset - engineered specifically for reliability-critical power monitoring in harsh environments.
FAQ
What is the exact reset threshold voltage of the MAX6468XS26D3+?
The MAX6468XS26D3+ has a factory-trimmed reset threshold of +2.625V, with ±1.5% accuracy at +25°C and ±3% over the full -40°C to +125°C operating range. This value is confirmed in the Reset Threshold table of the datasheet and corresponds to the "26" suffix in the part number.
Does the MAX6468XS26D3+ require an external pullup resistor on the RESET pin?
No, the MAX6468XS26D3+ features a push-pull RESET output and does not require an external pullup resistor. Unlike the open-drain MAX6467 variant, the MAX6468XS26D3+ actively drives both high (≥0.8×VCC) and low (≤0.3V at 1.2mA sink) states, simplifying system design and reducing BOM count.
What is the function of the MR pin on the MAX6468XS26D3+?
The MR pin on the MAX6468XS26D3+ is an edge-triggered manual reset input. A falling edge initiates a fixed 150ms one-shot RESET pulse, and the device includes 150ms rising-edge debounce to reject switch bounce. An internal 1.5kΩ pullup resistor allows MR to be left floating if unused.
Is the MAX6468XS26D3+ qualified for automotive applications?
Yes, the MAX6468XS26D3+ is AEC-Q100 qualified and specified for operation from -40°C to +125°C. The "+" suffix indicates RoHS-compliant lead-free packaging, and the device meets automotive reliability and stress testing requirements for under-hood and cabin electronics.
How does the MAX6468XS26D3+ handle short voltage transients on VCC?
The MAX6468XS26D3+ is immune to short-duration VCC transients: it rejects glitches ≤100ns wide at 100mV overdrive, as shown in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive." A 0.1µF bypass capacitor further enhances immunity.
MAX6468XS26D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- 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
MAX6468XS26D3+ FAQ
1.How can I place an order for MAX6468XS26D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468XS26D3+ 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 MAX6468XS26D3+ reliable?
The price and inventory of MAX6468XS26D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468XS26D3+ is usually 5 days.
3.What payment methods are accepted for MAX6468XS26D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468XS26D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468XS26D3+?
MAX6468XS26D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468XS26D3+ 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 MAX6468XS26D3+?
For technical support, including MAX6468XS26D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468XS26D3+ requirements.
6.How does Aetrix verify that MAX6468XS26D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6468XS26D3+ 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 MAX6468XS26D3+ meets industry standards.
7.What is the process for return or replacement of MAX6468XS26D3+?
All MAX6468XS26D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468XS26D3+, 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 MAX6468XS26D3+ part is unused and in its original packaging.
Return procedure for MAX6468XS26D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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