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Analog Devices Inc./Maxim Integrated MAX6750KA46+T
- Part No.:
- MAX6750KA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6750KA46+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
MAX6750KA46+T from Analog Devices is a dual-voltage microprocessor supervisory IC with factory-trimmed VCC reset threshold (4.625V ±2%) and adjustable RESET IN monitoring, capacitor-programmable reset timeout (5.7–9.5ms), watchdog timeout extension (128×), and push-pull active-low RESET output. It operates across -40°C to +125°C and supports automotive-grade power sequencing in battery-powered controllers and embedded systems.
For engineers reviewing the MAX6750KA46+T datasheet, MAX6750KA46+T pinout, MAX6750KA46+T application, or MAX6750KA46+T equivalent, this device delivers verified dual-supply monitoring, transient-immune reset assertion down to VCC ≥ 1V, and AEC-Q100-qualified operation for critical μP supervision in harsh environments.
Technical Context
The MAX6750KA46+T integrates two independent reset comparators: one monitors VCC against a factory-set 4.625V threshold (±2%), while the second monitors an external voltage via RESET IN using a 1.235V internal reference and external resistor divider. It implements a single-capacitor-adjustable watchdog timer with WDS-controlled 128× timeout extension, distinct from the windowed watchdog of MAX6752/MAX6753.
Its reset logic asserts RESET low when either VCC drops below 4.625V or RESET IN falls below its calculated threshold, with guaranteed reset validity down to VCC = 1V and immunity to transients ≤50µs at 100mV overdrive. The push-pull output drives loads up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VCC) | 4.625V ±2% - factory-trimmed for precise brownout detection at nominal 4.6V rail |
| RESET IN Reference | 1.235V ±0.8% - enables accurate dual-rail monitoring via external resistor divider |
| Reset Timeout Period | 5.69–9.49ms (CSRT = 1500pF) - programmable via capacitor on SRT pin for μP boot timing compliance |
| Watchdog Timeout (Normal) | 5.69–9.49ms (CSWT = 1500pF) - matches reset timeout for synchronized fault recovery |
| Watchdog Timeout (Extended) | 729–1214ms (CSWT = 1500pF) - 128× extension via WDS = VCC for long-loop software supervision |
| Supply Current | 3.7–10µA (VCC = 1.2–5.5V) - ultra-low quiescent current for battery longevity in portable equipment |
| Operating Temperature | -40°C to +125°C - fully specified for automotive under-hood and industrial control applications |
Pinout & Package
MAX6750KA46+T is housed in an 8-pin SOT23 package (Outline 21-0078, Land Pattern 90-0176), optimized for space-constrained PCB layouts and compatible with standard reflow profiles (peak 260°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Adjustable reset input | High-impedance node for external voltage monitoring via resistor divider; threshold set by 1.235V internal reference |
| 2 - GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance for noise immunity |
| 3 - VCC | Power supply input | Primary supply rail (1.2–5.5V); powers internal circuitry and serves as monitored voltage for fixed-threshold reset |
| 4 - RESET | Active-low reset output | Push-pull driver capable of sinking 3.2mA at VCC ≥ 4.5V; asserts low during fault conditions for μP reset initiation |
| 5 - SWT | Watchdog timeout input | Capacitor connection point (to GND) setting basic watchdog period; extended mode activated by WDS = VCC |
| 6 - SRT | Reset timeout input | Capacitor connection point (to GND) setting reset assertion duration; determines μP hold time after power stabilization |
| 7 - WDS | Watchdog select input | Digital control pin: GND selects normal watchdog timeout, VCC enables 128× extended mode and clears timer on transition |
| 8 - WDI | Watchdog input | Falling-edge-triggered input; must toggle within timeout window to prevent reset assertion; requires 100kΩ pull-down if unused |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (4.625V ±2%) and external rail via RESET IN, enabling robust multi-rail system reset coordination |
| Capacitor-programmable timing | Independent SRT and SWT pins allow precise, board-level tuning of reset and watchdog timeouts without firmware changes |
| 128× watchdog extension | WDS pin enables scalable timeout scaling-critical for variable-loop software where fixed watchdog periods are insufficient |
| Transient-immune reset | Guaranteed immunity to ≤50µs supply glitches at 100mV overdrive, eliminating spurious resets in noisy automotive/industrial environments |
| AEC-Q100 qualified | Validated for automotive applications per AEC-Q100 Rev H, supporting deployment in safety-critical ECUs and ADAS subsystems |
Applications
| Automotive Body Control Module | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Supervises 5V main MCU supply and 3.3V sensor interface rail in a vehicle door module subject to load-dump transients. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting RESET when either rail dips below specification, with 128× extended watchdog for CAN message polling loops. Use Value: Prevents MCU lockup during electrical disturbances while maintaining deterministic reset timing compliant with ISO 16750-2. |
Use Scenario: Monitors battery-backed 3.3V MCU and isolated 5V motor driver supply in a Class II medical device requiring fail-safe restart. IC Role / Device Role / Timing Role: Provides independent reset assertion on either supply failure and capacitor-tuned 8ms reset hold time for EEPROM write completion. Use Value: Ensures deterministic recovery from brownout without data corruption, meeting IEC 62304 SW lifecycle requirements. |
| Industrial PLC I/O Subsystem | Portable Test Equipment |
Use Scenario: Guards 24V-to-5V converted supply and auxiliary 12V analog front-end rail in a DIN-rail mounted controller exposed to EFT bursts. IC Role / Device Role / Timing Role: Uses RESET IN to monitor isolated 12V rail via resistor divider while VCC tracks primary 5V domain; push-pull RESET drives optocoupler input. Use Value: Delivers >1kV EFT immunity margin through transient-hardened reset architecture and guaranteed VCC ≥ 1V operation. |
Use Scenario: Supervises Li-ion powered 3.3V MCU and 5V display backlight in handheld diagnostic gear with aggressive power cycling. IC Role / Device Role / Timing Role: Leverages ultra-low 3.7µA ICC to extend battery life; capacitor-adjustable watchdog prevents hang during USB enumeration sequences. Use Value: Achieves >12-month shelf life on single charge while ensuring reliable wake-from-sleep recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6751KA46+T | Includes manual-reset (MR) input; otherwise identical reset/watchdog specs and pinout | Required where operator-initiated reset is mandated (e.g., field-serviceable instruments) | Select MAX6751KA46+T only if physical reset button integration is needed; MAX6750KA46+T saves board space without MR |
| TLV809E46DBZR | Single-threshold (4.63V), no watchdog, no RESET IN, SOT23-3 package, 1.6µA ICC | Suitable only for basic VCC-only reset in cost-sensitive, non-safety-critical applications | Choose TLV809E46DBZR for simplified designs lacking dual-rail or watchdog requirements; not a functional replacement |
Compared with MAX6750KA46+T, MAX6751KA46+T adds manual reset capability at identical dual-supply supervision performance, while TLV809E46DBZR reduces functionality to basic VCC monitoring only-making it viable only where watchdog and adjustable monitoring are unnecessary.
Availability
MAX6750KA46+T is available at Aetrix Electronics and suitable for automotive body control modules, medical infusion pump controllers, industrial PLC I/O subsystems, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6750KA46+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 with precision power and sensing solutions.
The MAX6746–MAX6753 family was designed specifically for AEC-Q100-compliant microprocessor supervision in harsh environments, emphasizing dual-rail monitoring, transient immunity, and capacitor-programmable timing for automotive and industrial embedded systems.
FAQ
What is the factory-set VCC reset threshold voltage for MAX6750KA46+T?
The MAX6750KA46+T features a factory-trimmed VCC reset threshold of 4.625V with ±2% tolerance over -40°C to +125°C. This value corresponds to the "46" suffix in the part number and is verified per Table 2 in the datasheet. The threshold remains stable across temperature and supply voltage variations, enabling precise brownout detection for 5V-system applications without external calibration.
Does MAX6750KA46+T support dual-voltage monitoring, and how is the second voltage configured?
Yes, MAX6750KA46+T supports dual-voltage monitoring: VCC is monitored against its 4.625V threshold, while a second voltage is monitored via the RESET IN pin using an external resistor divider referenced to the device's internal 1.235V comparator. The monitored voltage threshold is calculated as VMON_TH = 1.235 × (R1 + R2)/R2, allowing flexible configuration for rails such as 3.3V or 2.5V without additional components.
How is the watchdog timeout extended by 128× on MAX6750KA46+T?
The MAX6750KA46+T extends watchdog timeout by 128× using the WDS (Watchdog Select) pin: connecting WDS to VCC activates extended mode, multiplying the base timeout (set by CSWT capacitor on SWT pin) by 128. A transition on WDS also clears the watchdog timer. This feature enables scalable supervision for software with highly variable execution cycles, unlike the windowed watchdog found in MAX6752/MAX6753.
What is the minimum VCC level at which MAX6750KA46+T guarantees valid RESET output?
MAX6750KA46+T guarantees valid RESET logic state (correct high/low assertion) for VCC ≥ 1V. Below 1V, the push-pull output's sink capability degrades, potentially causing indeterminate logic levels at the μP reset input. For applications requiring reset validity down to 0V, a 100kΩ pulldown resistor between RESET and GND is recommended per the datasheet's "Ensuring a Valid RESET Down to VCC = 0V" section.
Is MAX6750KA46+T AEC-Q100 qualified, and what grade does it meet?
Yes, MAX6750KA46+T is AEC-Q100 qualified and fully specified over the automotive temperature range of -40°C to +125°C. It meets AEC-Q100 Grade 0 requirements for reliability and stress testing, making it suitable for under-hood and safety-critical electronic control units (ECUs) in passenger vehicles and commercial vehicles per the qualification summary in the datasheet.
MAX6750KA46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.625V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6750KA46+T FAQ
1.How can I place an order for MAX6750KA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6750KA46+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 MAX6750KA46+T reliable?
The price and inventory of MAX6750KA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6750KA46+T is usually 5 days.
3.What payment methods are accepted for MAX6750KA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6750KA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6750KA46+T?
MAX6750KA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6750KA46+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 MAX6750KA46+T?
For technical support, including MAX6750KA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6750KA46+T requirements.
6.How does Aetrix verify that MAX6750KA46+T is sourced from the original manufacturer or authorized distributors?
All MAX6750KA46+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 MAX6750KA46+T meets industry standards.
7.What is the process for return or replacement of MAX6750KA46+T?
All MAX6750KA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6750KA46+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 MAX6750KA46+T part is unused and in its original packaging.
Return procedure for MAX6750KA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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