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Analog Devices Inc./Maxim Integrated MAX6740XKVHD7-T
- Part No.:
- MAX6740XKVHD7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6740XKVHD7-T.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
MAX6740XKVHD7-T from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 2.925V, VTH2 = 1.575V) and one adjustable RSTIN input (488mV threshold), 1200ms minimum reset timeout, open-drain RESET output, manual reset detect function, and SC70-5 package. It monitors I/O and core supplies in portable multivoltage systems to ensure reliable µP boot and brownout protection.
For engineers reviewing the MAX6740XKVHD7-T datasheet, MAX6740XKVHD7-T pinout, MAX6740XKVHD7-T application, or MAX6740XKVHD7-T equivalent, key selection criteria include its triple-supply monitoring capability, 6µA supply current, 1200ms reset timeout, RSTIN-adjustable threshold down to 0.488V, and integrated manual reset detect with internal 50kΩ pullup - all in a space-saving 5-pin SC70 package.
Technical Context
The MAX6740XKVHD7-T implements a triple-supply supervisory architecture with independent comparators for VCC1 (2.925V), VCC2 (1.575V), and RSTIN (0.488V reference), each feeding into a shared reset timer. Its open-drain RESET output includes an internal 50kΩ pullup to VCC1, enabling direct pushbutton interfacing without external components.
Reset assertion occurs when any monitored voltage falls below its threshold; the 1200ms timeout begins only after all voltages exceed their thresholds. The device operates across -40°C to +85°C and draws just 6µA total supply current (ICC1 + ICC2), making it suitable for battery-powered applications requiring long standby life.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% over temperature - sets primary I/O supply reset point for 3.0V/3.3V rail monitoring |
| VCC2 Threshold | 1.575V ±2.5% over temperature - targets core supply monitoring for 1.6V/1.8V processors |
| RSTIN Threshold | 0.488V typical - enables precise external voltage monitoring via resistor divider (e.g., 12V, 5V, or negative rails) |
| Reset Timeout | 1200ms minimum - ensures µP completes full initialization before release, avoiding premature execution |
| Supply Current | 6µA total at +25°C - extends battery life in portable equipment; ICC1 = 5µA, ICC2 = 1µA at nominal conditions |
| Operating Temp | -40°C to +85°C - supports industrial and automotive-adjacent embedded environments |
| Package | 5-pin SC70 (2.0mm × 1.25mm × 0.9mm) - ultra-compact footprint for space-constrained PCBs |
Pinout & Package
Package: 5-pin SC70-5, surface-mount, moisture sensitivity level 1 (MSL1), lead-free compatible (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Asserts low on any threshold violation; internal 50kΩ pullup to VCC1 enables direct pushbutton reset without external resistor |
| 2 - GND | Ground reference | Common return for all analog comparators and digital logic; must be low-impedance connection to minimize noise coupling |
| 3 - VCC2 | Secondary supply input | Monitors core voltage (1.575V threshold); valid operation requires VCC2 ≥ 1.0V per datasheet |
| 4 - RSTIN | Adjustable reset input | Accepts external voltage divider; asserts reset when input < 0.488V; leakage < ±10nA enables high-R dividers for low power |
| 5 - VCC1 | Primary supply input | Monitors I/O voltage (2.925V threshold); powers internal circuitry and provides reference for RESET pullup and MR logic |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC1 (2.925V), VCC2 (1.575V), and RSTIN (0.488V) - eliminates need for three discrete supervisors in multirail systems |
| Manual reset detect | Integrated 50kΩ internal pullup on RESET pin allows direct pushbutton-to-GND connection; no external components required for field reset |
| Low quiescent current | 6µA total supply current - reduces battery drain in always-on portable devices such as GPS trackers and handheld medical instruments |
| Adjustable RSTIN input | 0.488V internal reference supports monitoring of any voltage (≥0.5V) using two external resistors - enables custom thresholds for DC-DC converters or battery fuel gauging |
| 1200ms reset timeout | Guaranteed minimum delay ensures µP firmware completes memory initialization and peripheral configuration before release |
Applications
| Portable Power Management | Multivoltage Processor Systems |
|---|---|
Use Scenario: Battery-powered handheld scanner with 3.3V I/O, 1.6V ARM core, and 12V motor driver rail. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting reset if any rail drops during cold start or brownout; RSTIN monitors 12V via divider. Use Value: Prevents processor lockup during Li-ion battery sag; 6µA current extends runtime between charges. | Use Scenario: Industrial PLC controller with separate 3.3V FPGA I/O, 1.8V FPGA core, and 5V analog front-end. IC Role / Device Role / Timing Role: Monitors all three rails independently; asserts unified RESET signal only after all stabilize above thresholds for 1200ms. Use Value: Ensures deterministic boot sequence across heterogeneous voltage domains without external timing logic. |
| Field-Serviceable Electronics | Battery Backup Systems |
Use Scenario: Ruggedized tablet used in warehouse logistics with momentary reset button for end-user recovery. IC Role / Device Role / Timing Role: RESET pin doubles as manual reset input via internal 50kΩ pullup; debounced internally for switch bounce immunity. Use Value: Eliminates external pullup resistor and debounce RC network - reduces BOM count and PCB area. | Use Scenario: Smart meter with main AC-DC supply and backup supercapacitor; detects capacitor depletion before main rail collapse. IC Role / Device Role / Timing Role: RSTIN monitors supercap voltage; triggers early reset to save state before VCC1/VCC2 fail. Use Value: Enables graceful shutdown and nonvolatile memory write completion using remaining energy margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6743XKVHD7-T | Push-pull RESET output (no internal pullup); identical thresholds, timeout, and pinout | Requires external pullup for bidirectional µP reset I/O; unsuitable for direct pushbutton use | Select when system needs active-high drive strength or µP reset pin cannot tolerate open-drain leakage |
| TPS3808G33DBVR | Dual-supply only (3.3V/1.8V fixed), no RSTIN input; 200ms timeout; SOT-23-6 package | Lacks third adjustable monitor channel; shorter timeout limits compatibility with slow-start µPs | Choose only if design uses exactly two rails and requires TI's qualification pedigree for automotive-qualified designs |
Compared with MAX6740XKVHD7-T, MAX6743XKVHD7-T offers stronger RESET drive but loses manual reset convenience, while TPS3808G33DBVR reduces monitoring flexibility and timing margin - making MAX6740XKVHD7-T optimal for compact, field-serviceable triple-rail systems demanding ultra-low power and configurability.
Availability
MAX6740XKVHD7-T is available at Aetrix Electronics and suitable for portable electronics, multivoltage embedded controllers, battery-backed instrumentation, and industrial handheld devices requiring stable component supply and long-term lifecycle support.
Supply support for MAX6740XKVHD7-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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, medical, and communications markets.
The MAX6736–MAX6745 product line delivers ultra-low-power, space-efficient µP supervisors targeting battery-operated and multivoltage embedded systems where reliability, small size, and minimal quiescent current are critical.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6740XKVHD7-T?
The MAX6740XKVHD7-T 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 "SV" suffix in the part number and Table 1 of the datasheet, and applies specifically to the MAX6740 variant with D7 (1200ms) timeout.
Does the MAX6740XKVHD7-T support manual reset functionality, and how is it implemented?
Yes, the MAX6740XKVHD7-T supports manual reset via its open-drain RESET pin, which includes an internal 50kΩ pullup resistor to VCC1. When a pushbutton connects RESET to GND, the output is forced low and remains low for the full 1200ms timeout period after release - no external components or dedicated MR pin are required, unlike earlier MAX6736–MAX6739 variants.
Can the MAX6740XKVHD7-T monitor a 5V supply, and what external components are needed?
Yes, the MAX6740XKVHD7-T can monitor a 5V supply using its RSTIN pin with a resistor divider. For example, to trigger reset at 4.5V, use R1 = 90.9kΩ and R2 = 10kΩ (VEXT_TH = 0.488V × (R1+R2)/R2 ≈ 4.5V). The RSTIN input's <±10nA leakage allows high-value resistors, minimizing current draw from the monitored rail.
What is the supply current consumption of the MAX6740XKVHD7-T under typical operating conditions?
The MAX6740XKVHD7-T consumes 6µA total supply current at +25°C - composed of 5µA from VCC1 and 1µA from VCC2 - as specified in the Electrical Characteristics table. This ultra-low current is maintained across the full -40°C to +85°C range and enables multi-year battery life in always-on IoT edge nodes and portable medical devices.
Is the MAX6740XKVHD7-T pin-compatible with other members of the MAX6736–MAX6745 family?
The MAX6740XKVHD7-T shares the same 5-pin SC70 package and pinout (RESET, GND, VCC2, RSTIN, VCC1) with MAX6738, MAX6739, and MAX6743, but differs functionally from MAX6736/MAX6737 (MR pin instead of RSTIN) and MAX6741/MAX6744 (POK1 instead of RSTIN). Always verify functional compatibility - not just pin count - before substitution.
MAX6740XKVHD7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 1.575V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX6740XKVHD7-T FAQ
1.How can I place an order for MAX6740XKVHD7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6740XKVHD7-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 MAX6740XKVHD7-T reliable?
The price and inventory of MAX6740XKVHD7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6740XKVHD7-T is usually 5 days.
3.What payment methods are accepted for MAX6740XKVHD7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6740XKVHD7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6740XKVHD7-T?
MAX6740XKVHD7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6740XKVHD7-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 MAX6740XKVHD7-T?
For technical support, including MAX6740XKVHD7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6740XKVHD7-T requirements.
6.How does Aetrix verify that MAX6740XKVHD7-T is sourced from the original manufacturer or authorized distributors?
All MAX6740XKVHD7-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 MAX6740XKVHD7-T meets industry standards.
7.What is the process for return or replacement of MAX6740XKVHD7-T?
All MAX6740XKVHD7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6740XKVHD7-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 MAX6740XKVHD7-T part is unused and in its original packaging.
Return procedure for MAX6740XKVHD7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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