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Analog Devices Inc./Maxim Integrated MAX6750KA32/V+T
- Part No.:
- MAX6750KA32/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6750KA32/V+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,159
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Product details
Overview
MAX6750KA32/V+T from Analog Devices is a dual-voltage microprocessor supervisory IC with factory-trimmed 3.2V VCC reset threshold and adjustable RESET IN monitoring, capacitor-programmable reset (5.7–9.5ms) and watchdog timeout periods, ±2% threshold accuracy over -40°C to +125°C, and AEC-Q100 qualification for automotive power-rail monitoring.
For engineers reviewing the MAX6750KA32/V+T datasheet, MAX6750KA32/V+T pinout, MAX6750KA32/V+T application, or MAX6750KA32/V+T equivalent, this device supports critical μP reset supervision in battery-powered controllers, medical equipment, and intelligent instruments where dual-supply monitoring, transient-immune reset assertion, and configurable windowed watchdog timing are required.
Technical Context
The MAX6750KA32/V+T integrates two independent reset comparators: one monitors VCC against a factory-trimmed 3.200V threshold (±2%, min/max 3.136V/3.264V), and the other monitors an external voltage via RESET IN with a fixed 1.235V internal reference (±0.8% hysteresis). It supports dual-voltage fault detection-RESET asserts if either VCC drops below its threshold or RESET IN falls below 1.235V.
It implements capacitor-adjustable timing: SRT sets reset timeout (tRP = 4.94×10⁶ × CSRT), while SWT configures watchdog timeout (tWD = 4.94×10⁶ × CSWT for normal mode). Unlike MAX6752/MAX6753, it does not support windowed watchdog; it uses standard single-timeout watchdog logic per MAX6746–MAX6751 architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.200V ±2% (3.136V–3.264V); ensures reliable brownout detection at nominal 3.3V rail |
| RESET IN Threshold | 1.235V ±0.8%; enables precise external voltage monitoring (e.g., 2.5V, 5V rails) via resistor divider |
| Reset Timeout Period | 5.69–9.49ms (CSRT = 100–1500pF); programmable to match μP power-up sequencing requirements |
| Watchdog Timeout Period | 5.69–9.49ms (CSWT = 100–1500pF); user-selectable to align with firmware watchdog service interval |
| Supply Current | 3.7–10µA (VCC = 1.2–5.5V); ultra-low quiescent current extends battery life in portable systems |
| Operating Temperature | -40°C to +125°C; fully specified for under-hood automotive and industrial embedded environments |
| Reset Output Type | Open-drain active-low; supports level-shifting and wired-OR reset bus configurations |
Pinout & Package
MAX6750KA32/V+T is housed in an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176), RoHS-compliant, with 0.65mm pitch and thermal resistance θJA = 196°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Adjustable reset comparator input | High-impedance node for external voltage monitoring; threshold set by internal 1.235V reference |
| 2 - GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance connection |
| 3 - SWT | Watchdog timeout capacitor terminal | Connects to ground via CSWT to program watchdog timeout (tWD = 4.94×10⁶ × CSWT) |
| 4 - SRT | Reset timeout capacitor terminal | Connects to ground via CSRT to program reset timeout (tRP = 4.94×10⁶ × CSRT) |
| 5 - VCC | Power supply input | Monitored 1.2–5.5V supply rail; powers internal circuitry and provides reference for VCC reset comparator |
| 6 - WDS | Watchdog select input | Pull to GND for normal watchdog mode; pull to VCC for 128× extended timeout (tWD × 128) |
| 7 - RESET | Open-drain reset output | Active-low signal asserted during VCC/RESET IN fault or manual reset; requires external pullup |
| 8 - WDI | Watchdog input | Falling-edge-triggered; must be toggled within tWD to prevent watchdog timeout reset |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (3.2V fixed) and external rail via RESET IN (1.235V ref), enabling system-level power integrity checks |
| 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 selects extended mode, multiplying basic timeout by 128-ideal for low-power sleep intervals in battery systems |
| Transient-immune reset | Guaranteed immunity to VCC glitches ≤50µs when falling 100mV below threshold, reducing false resets in noisy environments |
| AEC-Q100 qualified | Validated for automotive applications including engine control units and ADAS modules requiring Grade 0 (-40°C to +125°C) |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and 5V sensor bias rail in under-hood ECU exposed to load dump transients and thermal cycling. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail collapses; open-drain RESET interfaces with multi-vendor μP reset inputs. Use Value: Prevents code corruption during cold cranking (VCC dip) or sensor rail failure, meeting ISO 16750-2 pulse 4 immunity requirements. |
Use Scenario: Powers a handheld blood glucose meter with coin-cell battery and low-power ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Supervises battery voltage (via RESET IN divider) and MCU core rail (VCC = 3.2V), with ultra-low 3.7µA ICC extending runtime. Use Value: Guarantees safe shutdown before battery depletion, avoiding data loss during measurement sequence. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Embedded in DIN-rail mounted controller with isolated 24V DC input converted to 3.3V/5V rails. IC Role / Device Role / Timing Role: Detects brownout on both regulated outputs; uses WDS to extend watchdog timeout during scheduled communication pauses. Use Value: Eliminates spurious resets caused by switching regulator ripple, improving MTBF in continuous operation. |
Use Scenario: Used in ANSI C12.20-certified meter with tamper-detection circuitry and real-time clock backup. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and RTC backup battery (via RESET IN), asserting RESET if either falls below threshold. Use Value: Ensures meter retains calibration and timekeeping integrity during mains outage or battery degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6751KA32/V+T | Same 3.2V VCC threshold and dual-monitoring capability, but includes manual-reset (MR) input instead of RESET IN | Better suited for systems requiring operator-initiated reset (e.g., field-serviceable gateways) rather than dual-rail monitoring | Select MAX6751KA32/V+T when MR functionality is needed and external rail monitoring is unnecessary |
| TLV809E32DBVR | Single 3.2V VCC monitor only; no RESET IN, no watchdog, no capacitor-adjustable timing; 1.6µA ICC | Applicable only for basic power-on reset in cost-sensitive consumer devices-not for dual-rail or watchdog use cases | Choose TLV809E32DBVR only for simple reset generation where dual monitoring and watchdog are omitted |
Compared with MAX6750KA32/V+T, MAX6751KA32/V+T trades RESET IN for MR-retaining full dual-supply supervision capability but adding human-interface reset control-while TLV809E32DBVR reduces feature set to minimal reset-only function, sacrificing programmability, watchdog, and secondary rail monitoring.
Availability
MAX6750KA32/V+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLC I/O modules, and smart energy meters requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX6750KA32/V+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 since 1965.
The MAX6746–MAX6753 family was designed specifically for robust, low-power microprocessor supervision in harsh environments-emphasizing AEC-Q100 compliance, transient immunity, and flexible timing configuration for automotive and industrial embedded systems.
FAQ
What is the exact VCC reset threshold voltage for MAX6750KA32/V+T?
The MAX6750KA32/V+T features a factory-trimmed VCC reset threshold of 3.200V with ±2% tolerance, yielding a guaranteed range of 3.136V to 3.264V across -40°C to +125°C. This value is confirmed in Table 2 of the datasheet under suffix "32" and applies exclusively to the MAX6750 variant-not to MAX6748 or MAX6749 which lack VCC monitoring.
Does MAX6750KA32/V+T support windowed watchdog functionality?
No, MAX6750KA32/V+T does not implement windowed watchdog logic. It belongs to the MAX6746–MAX6751 subgroup, which supports only standard single-timeout watchdog with optional 128× extension via WDS. Windowed watchdog (fast/slow fault detection) is exclusive to MAX6752/MAX6753, as explicitly stated in the Selector Guide and Detailed Description sections.
Can MAX6750KA32/V+T monitor two independent supply voltages simultaneously?
Yes, MAX6750KA32/V+T performs true dual-voltage supervision: it monitors VCC against its internal 3.2V threshold while simultaneously monitoring an external voltage applied to RESET IN using the fixed 1.235V internal reference. RESET asserts if either condition is violated-a capability confirmed in the "Dual-Voltage Monitoring (MAX6750/MAX6751)" section of the datasheet.
What is the minimum supply voltage at which MAX6750KA32/V+T guarantees valid RESET output?
MAX6750KA32/V+T guarantees correct RESET logic state for VCC ≥ 1.0V. Below 1.0V, RESET behavior is not specified-though the device remains functional down to VCC = 1.2V per Absolute Maximum Ratings. This 1V guarantee ensures reliable reset assertion during brownout recovery in automotive and industrial applications.
Is MAX6750KA32/V+T pin-compatible with other members of the MAX6746–MAX6753 family?
Yes, MAX6750KA32/V+T shares the identical 8-pin SOT23 pinout with all MAX6746–MAX6753 variants, including MAX6746, MAX6748, MAX6751, and MAX6752. Pin functions (RESET IN, GND, SWT, SRT, VCC, WDS, RESET, WDI) are consistent across the family, enabling drop-in replacement where functional requirements align-verified in the "Pin Configurations" and "Pin Descriptions" sections.
MAX6750KA32/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.2V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6750KA32/V+T FAQ
1.How can I place an order for MAX6750KA32/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6750KA32/V+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 MAX6750KA32/V+T reliable?
The price and inventory of MAX6750KA32/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6750KA32/V+T is usually 5 days.
3.What payment methods are accepted for MAX6750KA32/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6750KA32/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6750KA32/V+T?
MAX6750KA32/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6750KA32/V+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 MAX6750KA32/V+T?
For technical support, including MAX6750KA32/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6750KA32/V+T requirements.
6.How does Aetrix verify that MAX6750KA32/V+T is sourced from the original manufacturer or authorized distributors?
All MAX6750KA32/V+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 MAX6750KA32/V+T meets industry standards.
7.What is the process for return or replacement of MAX6750KA32/V+T?
All MAX6750KA32/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6750KA32/V+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 MAX6750KA32/V+T part is unused and in its original packaging.
Return procedure for MAX6750KA32/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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