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Analog Devices Inc./Maxim Integrated MAX6739XKVD7-T
- Part No.:
- MAX6739XKVD7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6739XKVD7-T.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6739XKVD7-T from Maxim Integrated is a dual-voltage microprocessor supervisor IC with one factory-trimmed reset threshold (VTH1 = 3.075V) and one adjustable reset input (RSTIN, 0.488V reference), open-drain RESET output, manual reset input (MR), and 1200ms minimum reset timeout period. It monitors VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) supplies in portable electronics and multivoltage systems, asserting reset when either falls below its threshold.
For engineers reviewing the MAX6739XKVD7-T datasheet, MAX6739XKVD7-T pinout, MAX6739XKVD7-T application, or MAX6739XKVD7-T equivalent, key selection factors include its SC70-5 package, 6µA supply current, push-pull vs. open-drain output configuration, RSTIN adjustability down to 0.488V, and compatibility with battery-powered and sequencing-critical embedded designs.
Technical Context
The MAX6739XKVD7-T implements dual-supply monitoring using independent comparators for VCC1 and VCC2, plus an auxiliary comparator for the RSTIN input referenced to a precision 0.488V internal bandgap. Its reset assertion logic combines ORed fault detection across all three inputs with a single monolithic timeout timer.
It features a dedicated active-low MR input with internal 1.5kΩ pullup to VCC1, enabling external pushbutton or logic-initiated reset; the 1200ms timeout (D7 suffix) applies to both power-up and manual reset events, with restart-on-fault behavior ensuring robust glitch immunity during supply transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±2.5% (factory-trimmed; enables reliable reset at standard I/O rail) |
| VCC2 Threshold | 2.313V ±2.5% (factory-trimmed; matches common core supply rails) |
| RSTIN Threshold | 0.488V ±1.6% (fixed internal reference; supports external resistor-divider for custom monitoring) |
| Reset Timeout | 1200ms min (D7 option; ensures full system stabilization before µP release) |
| Supply Current | 6µA typical (enables multi-year battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (supports industrial and automotive-adjacent environments) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; space-constrained PCBs) |
Pinout & Package
MAX6739XKVD7-T is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height), optimized for high-density portable designs. Pin 1 is RESET (open-drain active-low), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC2 (secondary supply monitor), and Pin 5 is VCC1 (primary supply monitor).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: RESET | Open-drain active-low reset output | Requires external pullup; asserts low on any monitored supply fault or MR activation; compatible with bidirectional µP reset pins |
| Pin 2: GND | Analog/digital ground reference | Common return for all internal comparators and timing circuitry; must be low-impedance connection |
| Pin 3: MR | Active-low manual reset input | Internal 1.5kΩ pullup to VCC1; accepts CMOS logic or pushbutton-to-GND; initiates 1200ms reset timeout |
| Pin 4: VCC2 | Secondary supply voltage monitor input | Monitors core supply (0.9V–3.3V); threshold factory-set to 2.313V; no external components required |
| Pin 5: VCC1 | Primary supply voltage monitor input | Monitors I/O supply (1.8V–5.0V); threshold factory-set to 3.075V; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed/adjustable threshold architecture | Enables simultaneous monitoring of standard I/O rail (3.075V) and custom voltage (via RSTIN divider), eliminating need for external comparators |
| 1200ms reset timeout (D7) | Guarantees µP remains held in reset long enough for slow-ramping DC/DC converters and peripheral initialization |
| 6µA ultra-low quiescent current | Reduces battery drain in always-on monitoring applications such as GPS trackers and medical wearables |
| RSTIN input with 0.488V reference | Supports monitoring of sub-1V supplies (e.g., FPGA core, LPDDR I/O) using high-value resistors to minimize power loss |
| SC70-5 package | Provides 55% smaller footprint than SOT23-5, critical for compact handheld and IoT edge devices |
Applications
| Portable Power Management | Multivoltage Processor Sequencing |
|---|---|
Use Scenario: Battery-powered GPS tracker requiring reliable startup and brownout protection during intermittent solar charging. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset when Li-ion voltage drops below 3.075V (VCC1) or 2.313V (VCC2), preventing corrupted firmware execution. Use Value: 6µA supply current extends battery life; 1200ms timeout accommodates slow-charging battery recovery without premature µP release. | Use Scenario: Industrial controller with separate 3.3V I/O and 1.8V core supplies needing controlled power-up order. IC Role / Device Role / Timing Role: Monitors both rails independently; holds RESET until both exceed thresholds for full 1200ms, enforcing safe sequencing. Use Value: Eliminates need for discrete RC timers or additional sequencing ICs; factory-trimmed thresholds ensure consistent timing across production units. |
| Manual Reset Integration | Custom Voltage Monitoring |
Use Scenario: Field-deployed PDA requiring technician-initiated reset without power cycle. IC Role / Device Role / Timing Role: MR pin accepts pushbutton input; internal 1.5kΩ pullup eliminates external component; 1200ms timeout ensures complete system reset. Use Value: Reduces BOM count and board area; debounced MR input prevents spurious resets from switch bounce. | Use Scenario: Wearable health sensor monitoring a 0.9V analog front-end supply. IC Role / Device Role / Timing Role: RSTIN pin used with resistor divider to set trip point at 0.9V; 0.488V internal reference enables precise scaling. Use Value: Achieves ±2% accuracy over temperature without trimming; high-impedance RSTIN input allows >1MΩ dividers, minimizing standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6738XKVD7-T | Same pinout, same thresholds (3.075V/2.313V), same D7 timeout, but open-drain RESET output | Identical monitoring capability; differs only in RESET output type (open-drain vs. push-pull) | Select MAX6738XKVD7-T if external pullup is preferred or µP requires open-drain interface |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); 350ms timeout; SOT23-6 package; 1.6µA ICC | Lacks dual-monitoring and RSTIN adjustability; suitable only for single-rail systems | Choose TPS3808G33DBVR only when monitoring one supply and minimal quiescent current is paramount |
Compared with MAX6739XKVD7-T, MAX6738XKVD7-T offers identical supervision functionality with open-drain output flexibility, while TPS3808G33DBVR provides lower current but sacrifices dual-rail capability and adjustable monitoring-making MAX6739XKVD7-T optimal for compact, multivoltage, battery-sensitive designs requiring guaranteed 1200ms hold time.
Availability
MAX6739XKVD7-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply and long-term lifecycle support.
Supply support for MAX6739XKVD7-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, sensing, and connectivity applications.
The MAX6736–MAX6745 family delivers ultra-low-power dual/triple-supply supervision in miniature SC70 packages, targeting space- and energy-constrained portable and embedded systems.
FAQ
What is the reset timeout period for MAX6739XKVD7-T?
The MAX6739XKVD7-T has a minimum reset timeout period of 1200ms (D7 suffix), applicable to both power-on reset and manual reset events. This duration is guaranteed over the full -40°C to +85°C operating temperature range and ensures sufficient hold time for slow-ramping power supplies and peripheral initialization before releasing the microprocessor.
Does MAX6739XKVD7-T support monitoring a 0.9V supply?
Yes, MAX6739XKVD7-T supports monitoring a 0.9V supply via its RSTIN input using an external resistor divider referenced to the internal 0.488V threshold. For example, a 1.02kΩ/1.0kΩ divider yields a 0.9V trip point with <±2% error over temperature, leveraging the device's low RSTIN input current (<10nA) to maintain accuracy.
What is the function of the MR pin on MAX6739XKVD7-T?
The MR pin on MAX6739XKVD7-T is an active-low manual reset input with an internal 1.5kΩ pullup resistor to VCC1. Pulling MR low for ≥1µs forces the RESET output low and initiates the 1200ms timeout period. The pin accepts CMOS logic levels or direct connection to a momentary pushbutton switch to ground, enabling field service or test-mode resets without power cycling.
Is MAX6739XKVD7-T pin-compatible with other MAX6736–MAX6745 variants?
Yes, MAX6739XKVD7-T shares the same 5-pin SC70-5 package and pinout (RESET, GND, MR, VCC2, VCC1) with all MAX6736–MAX6745 family members. This allows drop-in substitution across variants differing only in threshold voltages, reset output type (open-drain vs. push-pull), or timeout option (D3/D7), provided the functional requirements match the selected variant.
What are the absolute maximum ratings for VCC1 and VCC2 on MAX6739XKVD7-T?
The absolute maximum rating for both VCC1 and VCC2 on MAX6739XKVD7-T is -0.3V to +6V relative to GND. Exceeding these limits may cause permanent damage. The recommended operating range is 1.0V to 5.5V for VCC1 and 0.9V to 3.3V for VCC2, with full specification compliance guaranteed from -40°C to +85°C ambient temperature.
MAX6739XKVD7-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:
- 2
- Voltage - Threshold:
- 1.575V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6739XKVD7-T FAQ
1.How can I place an order for MAX6739XKVD7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6739XKVD7-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 MAX6739XKVD7-T reliable?
The price and inventory of MAX6739XKVD7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6739XKVD7-T is usually 5 days.
3.What payment methods are accepted for MAX6739XKVD7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6739XKVD7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6739XKVD7-T?
MAX6739XKVD7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6739XKVD7-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 MAX6739XKVD7-T?
For technical support, including MAX6739XKVD7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6739XKVD7-T requirements.
6.How does Aetrix verify that MAX6739XKVD7-T is sourced from the original manufacturer or authorized distributors?
All MAX6739XKVD7-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 MAX6739XKVD7-T meets industry standards.
7.What is the process for return or replacement of MAX6739XKVD7-T?
All MAX6739XKVD7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6739XKVD7-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 MAX6739XKVD7-T part is unused and in its original packaging.
Return procedure for MAX6739XKVD7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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