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Analog Devices Inc./Maxim Integrated MAX6744XKVDD3
- Part No.:
- MAX6744XKVDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6744XKVDD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,885
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Product details
Overview
The MAX6744XKVDD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull reset output, VCC1 power-OK (POK1) output, and factory-trimmed reset thresholds of 2.925V (VTH1) and 2.188V (VTH2). It monitors I/O and core supply rails in multivoltage systems, asserts reset if either supply falls below its threshold, and maintains reset for ≥150ms after recovery. Designed for power-supply sequencing in portable and battery-powered equipment.
For engineers reviewing the MAX6744XKVDD3 datasheet, MAX6744XKVDD3 pinout, MAX6744XKVDD3 application, or MAX6744XKVDD3 equivalent, key selection criteria include its dual fixed-threshold supervision, POK1 timing (37.5–75ms), 6µA supply current, SC70-5 package, and -40°C to +85°C operating range - all critical for low-power embedded sequencing designs.
Technical Context
The MAX6744XKVDD3 implements two independent voltage comparators with precision internal references (VTH1 = 2.925V, VTH2 = 2.188V), each feeding a shared reset timeout timer. Its POK1 output is driven by a dedicated comparator monitoring only VCC1 against VTH1, with a separate 37.5–75ms deassertion delay.
Reset assertion is edge-triggered on falling VCC1/VCC2 and latched for the full 150–300ms timeout; the timer restarts if either supply dips again before timeout completion. The push-pull RESET output is referenced to VCC1 and requires no external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH1 / VTH2 | 2.925V / 2.188V factory-trimmed thresholds - enables precise I/O (VCC1) and core (VCC2) supply monitoring without external resistors |
| Reset Timeout (tRP) | 150ms min (D3 suffix) - ensures µP reset hold time meets boot initialization requirements |
| POK1 Timeout (tPOKP) | 37.5ms min - provides stable enable signal for downstream DC/DC converter sequencing |
| Supply Current (ICC1) | 6µA typical at VCC1 = 3.3V - supports >1-year battery life in always-on portable devices |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive cabin-temperature applications |
| Package | 5-pin SC70-5 (2.0mm × 1.25mm × 0.9mm) - enables high-density PCB layouts in space-constrained handhelds |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup resistor and simplifies µP interface |
Pinout & Package
Package: 5-pin SC70-5, surface-mount, moisture-sensitive level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly; sinks/source current per VCC1; no external pullup required |
| 2 - GND | Analog/digital ground reference | Common return for all internal comparators, timers, and outputs; must be low-impedance |
| 3 - VCC2 | Secondary supply input (core rail) | Monitored against 2.188V threshold; valid operation requires VCC2 ≥ 1.0V |
| 4 - POK1 | Open-drain active-high VCC1 power-OK output | Signals VCC1 stability after 37.5–75ms delay; requires external pullup to enable VCC2 sequencing |
| 5 - VCC1 | Primary supply input (I/O rail) | Monitored against 2.925V threshold; powers internal circuitry and references RESET/POK1 logic |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold supervision | Eliminates external resistor networks for VCC1/VCC2 monitoring - reduces BOM count and layout area |
| VCC1 Power-OK (POK1) output | Enables reliable power-up sequencing (e.g., VCC1 → POK1 enable → VCC2) without external timing components |
| 6µA ultra-low ICC1 | Extends battery runtime in coin-cell or Li-ion powered devices where standby current dominates lifetime |
| SC70-5 footprint | Matches industry-standard 5-pin supervisory IC land pattern - allows drop-in replacement in existing designs |
| 150ms reset timeout (D3) | Guarantees sufficient reset assertion time for ARM Cortex-M and RISC-V boot ROM execution |
Applications
| Portable Power Management | Industrial Controller Sequencing |
|---|---|
Use Scenario: Battery-powered handheld scanner with separate 3.3V I/O and 2.2V core rails. IC Role / Device Role / Timing Role: MAX6744XKVDD3 monitors both rails and generates POK1 to enable core regulator only after I/O rail stabilizes. Use Value: Prevents core logic corruption during brown-out; 6µA quiescent current extends 200mAh coin-cell life to >18 months. | Use Scenario: Programmable logic controller (PLC) module requiring strict VCC_IO → VCC_CORE power-up order. IC Role / Device Role / Timing Role: MAX6744XKVDD3 asserts RESET until both supplies are valid, then releases RESET only after POK1 confirms VCC1 readiness. Use Value: Eliminates need for discrete RC timing circuits; ensures deterministic startup across -40°C to +85°C ambient. |
| Medical Wearable Boot Integrity | POS Terminal Supply Monitoring |
Use Scenario: ECG patch with ultra-low-power MCU and analog front-end, powered by rechargeable LiPo. IC Role / Device Role / Timing Role: MAX6744XKVDD3 supervises 3.0V system rail and 1.8V sensor rail, asserting RESET on any undervoltage event. Use Value: Guarantees safe MCU reset before firmware executes; 2.925V/2.188V thresholds match common LDO outputs. | Use Scenario: Point-of-sale terminal with dual-rail power architecture and hot-swap capability. IC Role / Device Role / Timing Role: MAX6744XKVDD3 detects I/O rail collapse during hot-plug events and triggers immediate RESET to prevent data corruption. Use Value: 150ms timeout aligns with USB PD negotiation windows; SC70 package fits tight connector-edge layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6741XKVDD3 | Same dual fixed-threshold (2.925V/2.188V), open-drain RESET, identical POK1 function | Requires external pullup on RESET; less suitable for µPs with weak internal pullups | Select when board already includes RESET pullup or noise immunity favors open-drain |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no POK1 output; 200ms timeout; SOT-23-5 package | Lacks dual-rail monitoring and sequencing capability; cannot replace MAX6744XKVDD3 in VCC1/VCC2 systems | Consider only for single-rail designs where POK1 and VCC2 monitoring are unnecessary |
Compared with MAX6744XKVDD3, MAX6741XKVDD3 offers identical supervision and POK1 functionality but requires an external RESET pullup, increasing component count; TPS3808G33DBVR lacks dual-supply support and sequencing features, making it unsuitable as a functional substitute in multivoltage applications.
Availability
MAX6744XKVDD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply and long-term production continuity.
Supply support for MAX6744XKVDD3 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 power, sensing, and connectivity in industrial, medical, and consumer applications.
The MAX6736–MAX6745 family delivers low-power, space-efficient µP supervision with integrated sequencing features - specifically engineered for battery-operated and multivoltage embedded systems demanding reliability and minimal footprint.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6744XKVDD3?
The MAX6744XKVDD3 has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as defined by the "SV" suffix in its part number per Table 1 of the datasheet. These values are guaranteed over the full -40°C to +85°C temperature range with ±1.5% tolerance, enabling accurate monitoring of standard 3.0V and 2.2V supply rails without calibration.
Does the MAX6744XKVDD3 require an external pullup resistor on the RESET pin?
No, the MAX6744XKVDD3 features a push-pull RESET output referenced to VCC1, so no external pullup resistor is required. This simplifies design and reduces component count compared to open-drain alternatives like the MAX6741XKVDD3. The output drives actively high or low, ensuring robust interfacing with µP reset inputs.
How does the POK1 output function in power-supply sequencing with the MAX6744XKVDD3?
The POK1 output on the MAX6744XKVDD3 is an open-drain active-high signal that remains low until VCC1 exceeds 2.925V for ≥37.5ms. Once asserted, POK1 can enable a downstream DC/DC converter for VCC2, enforcing strict I/O-before-core sequencing. An external pullup resistor is required on POK1 to generate the high-level enable signal.
What is the minimum reset timeout period for the MAX6744XKVDD3, and how is it configured?
The MAX6744XKVDD3 uses the "D3" suffix to specify a minimum reset timeout period of 150ms. This value is factory-programmed and non-adjustable. The timeout begins after both VCC1 and VCC2 exceed their respective thresholds and ensures sufficient reset assertion time for most 32-bit microcontrollers to complete boot ROM initialization.
Can the MAX6744XKVDD3 monitor a 1.2V core supply?
No - the MAX6744XKVDD3's VCC2 input is specified for monitoring voltages from 1.0V to 3.3V, but its factory-trimmed VTH2 threshold is fixed at 2.188V. To supervise a 1.2V rail, a different variant such as MAX6744XKVD3 (VTH2 = 1.110V) or an adjustable-threshold device like MAX6739 would be required. Using MAX6744XKVDD3 for 1.2V monitoring would result in permanent reset assertion.
MAX6744XKVDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6744XKVDD3 FAQ
1.How can I place an order for MAX6744XKVDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6744XKVDD3 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 MAX6744XKVDD3 reliable?
The price and inventory of MAX6744XKVDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6744XKVDD3 is usually 5 days.
3.What payment methods are accepted for MAX6744XKVDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6744XKVDD3 transactions.
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4.How is shipping managed for MAX6744XKVDD3?
MAX6744XKVDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6744XKVDD3 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 MAX6744XKVDD3?
For technical support, including MAX6744XKVDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6744XKVDD3 requirements.
6.How does Aetrix verify that MAX6744XKVDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6744XKVDD3 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 MAX6744XKVDD3 meets industry standards.
7.What is the process for return or replacement of MAX6744XKVDD3?
All MAX6744XKVDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6744XKVDD3, 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 MAX6744XKVDD3 part is unused and in its original packaging.
Return procedure for MAX6744XKVDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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