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Analog Devices Inc./Maxim Integrated MAX6743XKYDD3
- Part No.:
- MAX6743XKYDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6743XKYDD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,027
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Product details
Overview
The MAX6743XKYDD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 2.925V, VTH2 = 2.188V) and one user-adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and 150ms minimum reset timeout. It monitors dual supply rails (e.g., I/O and core) in portable electronics while consuming only 6µA typical supply current.
For engineers reviewing the MAX6743XKYDD3 datasheet, MAX6743XKYDD3 pinout, MAX6743XKYDD3 application, or MAX6743XKYDD3 equivalent, key selection criteria include its SC70-5 package footprint, guaranteed operation from -40°C to +85°C, precise dual fixed thresholds with adjustable third input, push-pull RESET drive capability, and absence of MR/PFI/POK functions - distinguishing it from other members of the MAX6736–MAX6745 family.
Technical Context
The MAX6743XKYDD3 implements a triple-supply monitoring architecture: VCC1 and VCC2 are independently compared against factory-set thresholds (2.925V and 2.188V, respectively), while RSTIN accepts an external voltage divider to monitor a third rail down to 0.488V. Reset assertion occurs if any monitored input falls below its threshold and remains asserted for ≥150ms after all inputs recover.
Its push-pull RESET output is referenced to VCC1 and drives high to ≥0.8×VCC1 when deasserted, eliminating need for external pull-up. The device lacks MR, PFI, PFO, and POK1 pins - confirmed by pin configuration diagrams and selector guide - making it functionally distinct from MAX6740/MAX6741/MAX6742 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% over -40°C to +85°C - sets primary I/O supply reset point |
| VCC2 Threshold | 2.188V ±2.5% over -40°C to +85°C - sets secondary core supply reset point |
| RSTIN Threshold | 0.488V typical - enables monitoring of third rail (e.g., analog or auxiliary supply) via resistor divider |
| Reset Timeout | 150ms minimum - ensures µP reset pulse meets minimum duration requirements |
| Supply Current | 6µA typical at +25°C - supports battery-powered operation with minimal quiescent drain |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Package | 5-pin SC70 - 1.6mm × 1.6mm footprint ideal for space-constrained PCBs |
Pinout & Package
MAX6743XKYDD3 uses a 5-pin SC70-5 package with exposed pad (not electrically connected). Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is VCC2, Pin 4 is RSTIN, and Pin 5 is VCC1 - verified from official pin configuration diagram and selector guide.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives high to ≥0.8×VCC1 when deasserted; no external pull-up required |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators and output stage |
| 3 - VCC2 | Secondary supply input | Monitored against 2.188V threshold; must be ≥1.0V for valid operation |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external resistor divider; asserts reset when voltage <0.488V |
| 5 - VCC1 | Primary supply input | Monitored against 2.925V threshold; powers internal circuitry and RESET output stage |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (2.925V), VCC2 (2.188V), and RSTIN (0.488V reference) - eliminates need for three discrete supervisors |
| Push-pull RESET output | Active-low output with rail-to-rail drive strength - simplifies interface to µP reset pins without external components |
| Factory-trimmed precision thresholds | ±2.5% tolerance over full temperature range - reduces system-level calibration effort |
| Ultra-low quiescent current | 6µA typical - extends battery life in portable equipment such as GPS and PDAs |
| SC70-5 package | 1.6mm × 1.6mm footprint - saves >50% board area vs. SOT23-5 in dense multivoltage systems |
Applications
| Portable Power Management | Multivoltage Processor Supervision |
|---|---|
Use Scenario: Battery-powered handheld devices requiring reliable power-on reset and brownout detection across I/O and core rails. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting RESET until both VCC1 (I/O) and VCC2 (core) stabilize above 2.925V and 2.188V, respectively, for ≥150ms. Use Value: Prevents processor lockup during battery sag or cold-start conditions using factory-calibrated thresholds and low 6µA current draw. | Use Scenario: Embedded controllers with separate 3.3V I/O and 2.2V core supplies needing coordinated reset sequencing. IC Role / Device Role / Timing Role: Monitors VCC1=3.3V (vs. 2.925V threshold) and VCC2=2.2V (vs. 2.188V threshold) to ensure both rails meet minimum operating voltage before releasing µP reset. Use Value: Guarantees safe startup timing without external timing components or software intervention. |
| Adjustable Auxiliary Rail Monitoring | Low-Power Industrial Sensor Node |
Use Scenario: Systems with a third critical supply (e.g., 1.8V analog sensor bias) requiring independent reset control. IC Role / Device Role / Timing Role: Uses RSTIN pin with resistor divider to detect drop below 0.488V reference - triggering RESET alongside VCC1/VCC2 faults. Use Value: Enables single-chip supervision of three rails with <100nA RSTIN input leakage - preserves accuracy in high-impedance divider networks. | Use Scenario: Wireless sensor nodes powered by coin-cell batteries where every nanoamp impacts operational lifetime. IC Role / Device Role / Timing Role: Provides guaranteed reset assertion on supply dip while drawing only 6µA - extending usable battery life by months vs. higher-current alternatives. Use Value: Eliminates need for external low-leakage discrete supervision circuits, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKYDD3 | Open-drain RESET output; includes manual reset detect on RESET pin; same thresholds and timeout | Requires external pull-up resistor; supports pushbutton reset via RESET pin debouncing | Select when manual reset functionality or open-drain flexibility is required |
| TPS3808G33DBVR | Dual-supply supervisor (not triple); fixed 3.3V/1.8V thresholds; 200ms timeout; SOT23-6 package | Lacks RSTIN input - cannot monitor third rail; larger footprint and higher 16µA supply current | Select only if third-rail monitoring is unnecessary and SOT23-6 layout is acceptable |
Compared with MAX6740XKYDD3, the MAX6743XKYDD3 offers push-pull RESET for simpler µP interfacing but omits manual reset detect; versus TPS3808G33DBVR, it adds critical third-rail monitoring and cuts supply current by 62.5%, justifying its use in space- and power-constrained triple-rail systems.
Availability
MAX6743XKYDD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply with guaranteed -40°C to +85°C operation and SC70-5 packaging.
Supply support for MAX6743XKYDD3 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 management, sensing, and connectivity applications.
The MAX6736–MAX6745 product line delivers ultra-low-power, multi-rail microprocessor supervisors optimized for battery-operated and space-constrained embedded systems requiring accurate, factory-trimmed voltage monitoring.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKYDD3?
The MAX6743XKYDD3 has a factory-trimmed VCC1 reset threshold of 2.925V, with ±2.5% tolerance over the full -40°C to +85°C operating temperature range. This value is confirmed by the "Y" suffix in the part number per Table 1 of the datasheet and applies specifically to the MAX6743XKYDD3 variant - not inferred from other family members.
Does the MAX6743XKYDD3 include a manual reset (MR) input pin?
No, the MAX6743XKYDD3 does not include a manual reset (MR) input pin. Its pinout consists of RESET, GND, VCC2, RSTIN, and VCC1 - verified in the official pin configuration diagram and selector guide. Unlike MAX6736–MAX6739 or MAX6740–MAX6742 variants, the MAX6743XKYDD3 omits MR functionality entirely.
What is the function of the RSTIN pin on the MAX6743XKYDD3?
The RSTIN pin on the MAX6743XKYDD3 serves as an adjustable reset threshold input with a precise 0.488V internal reference. When the voltage at RSTIN falls below this level - set via an external resistor divider - the device asserts the RESET output. Input leakage is ≤10nA, enabling high-impedance divider networks for minimal power impact.
What package type and dimensions does the MAX6743XKYDD3 use?
The MAX6743XKYDD3 uses a 5-pin SC70-5 package measuring 1.6mm × 1.6mm × 0.95mm (height), with pin pitch of 0.65mm. This compact footprint is confirmed in the "Pin Configurations" section and ordering information tables, and is identical across all MAX6736–MAX6745 SC70 variants.
Is the RESET output on the MAX6743XKYDD3 push-pull or open-drain?
The RESET output on the MAX6743XKYDD3 is push-pull active-low, as explicitly stated in the Selector Guide and pin description table. It drives high to ≥0.8×VCC1 when deasserted and low to ≤0.4V when asserted - eliminating the need for an external pull-up resistor unlike open-drain variants such as MAX6740XKYDD3.
MAX6743XKYDD3 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:
- -
MAX6743XKYDD3 FAQ
1.How can I place an order for MAX6743XKYDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKYDD3 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 MAX6743XKYDD3 reliable?
The price and inventory of MAX6743XKYDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKYDD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKYDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKYDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKYDD3?
MAX6743XKYDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKYDD3 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 MAX6743XKYDD3?
For technical support, including MAX6743XKYDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKYDD3 requirements.
6.How does Aetrix verify that MAX6743XKYDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKYDD3 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 MAX6743XKYDD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKYDD3?
All MAX6743XKYDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKYDD3, 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 MAX6743XKYDD3 part is unused and in its original packaging.
Return procedure for MAX6743XKYDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6743XKYDD3 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
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MCP809T-315I/TT
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