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Analog Devices Inc./Maxim Integrated MAX6738XKVD7+
- Part No.:
- MAX6738XKVD7+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6738XKVD7+.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:940
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Product details
Overview
The MAX6738XKVD7+ from Maxim Integrated is a low-power dual-voltage microprocessor supervisor IC with one factory-trimmed reset threshold (VTH1 = 2.925V) and one adjustable reset input (RSTIN, 0.488V internal reference), open-drain active-low RESET output, manual reset input (MR), and 1200ms minimum reset timeout period. It monitors primary I/O supply (VCC1) and secondary core supply (VCC2) in portable battery-powered systems requiring precise power sequencing and fault detection.
For engineers reviewing the MAX6738XKVD7+ datasheet, MAX6738XKVD7+ pinout, MAX6738XKVD7+ application, or MAX6738XKVD7+ equivalent, this device supports dual-rail voltage monitoring down to 0.9V core supplies, delivers ultra-low 6µA quiescent current, and integrates RSTIN-based external voltage scaling for sub-1V monitoring - critical for modern low-voltage SoCs and wearables.
Technical Context
The MAX6738XKVD7+ implements independent comparators for VCC1 and VCC2 against factory-set thresholds (VTH1 = 2.925V, VTH2 = 2.188V per suffix "V" in Table 2), plus a dedicated 0.488V reference comparator for RSTIN. Reset assertion occurs when any monitored voltage falls below its threshold and remains asserted for ≥1200ms after all voltages recover.
It features an open-drain RESET output requiring external pullup, a CMOS-compatible MR input with 1.5kΩ internal pullup to VCC1, and operates across -40°C to +85°C in 5-pin SC70 package. The RSTIN input draws ≤10nA, enabling high-impedance resistor-divider networks for scalable voltage monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold (VTH1) | 2.925V ±2.5% over -40°C to +85°C - sets reliable reset point for 3.0V/3.3V I/O rails |
| VCC2 Threshold (VTH2) | 2.188V ±2.5% over -40°C to +85°C - matches common 2.2V/2.5V core supply targets |
| RSTIN Threshold | 0.488V typical, 0.468V–0.507V min/max - enables precise external voltage monitoring via resistor divider |
| Reset Timeout Period | 1200ms minimum (D7 suffix) - ensures sufficient processor initialization time after power stabilization |
| Supply Current (ICC1) | 5µA typical at VCC1 = 1.8V, 10µA max - enables multi-year battery life in always-on IoT sensors |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive under-hood auxiliary modules |
| Package | 5-pin SC70 (2.0mm × 2.1mm) - provides space-constrained placement on dense PCBs |
Pinout & Package
MAX6738XKVD7+ is housed in a 5-pin SC70-5 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for compact portable designs. Pin functions are validated per Maxim's official pin configuration diagram (page 15, top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Drives low during fault; requires external pullup; interfaces directly with µP reset pins or logic gates |
| 2 - GND | Ground reference | Common return path for all internal comparators and outputs; must be low-impedance |
| 3 - MR | Manual reset input (active low) | Pull to GND ≥1µs to force RESET low; internal 1.5kΩ pullup to VCC1 eliminates need for external resistor |
| 4 - RSTIN | Adjustable reset threshold input | Monitors external voltage via resistor divider; asserts RESET when input < 0.488V; leakage ≤10nA |
| 5 - VCC1 | Primary supply input (I/O rail) | Power source for IC and reference for MR pullup, RESET drive, and POK logic; range 1.2V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC1 (2.925V) and VCC2 (2.188V) with separate comparators - prevents false resets due to cross-rail coupling |
| Adjustable RSTIN input | 0.488V internal reference enables monitoring of voltages as low as 0.5V using external resistors - supports 1.2V, 1.0V, and 0.8V domains |
| 1200ms reset timeout (D7) | Guaranteed minimum assertion time ensures full µP boot sequence completion before release - avoids premature firmware execution |
| 6µA supply current | Ultra-low ICC1 extends battery runtime in coin-cell-powered devices like medical patches and BLE sensors |
| SC70-5 footprint | 2.0mm × 2.1mm package reduces board area by >50% vs. SOT23-5 - ideal for wearables and hearing aids |
Applications
| Battery-Powered Wearables | Industrial Sensor Nodes |
|---|---|
|
Use Scenario: Smartwatch with dual-rail SoC (3.0V I/O, 1.2V core) and coin-cell battery. IC Role / Device Role / Timing Role: Supervises VCC1 (3.0V rail), VCC2 (1.2V core), and battery voltage via RSTIN divider; asserts RESET if either rail dips during RF transmission burst. Use Value: 6µA ICC1 minimizes standby drain; 1200ms timeout accommodates slow Li-ion voltage recovery post-load transient. |
Use Scenario: Wireless temperature sensor node powered by energy harvester with unstable output. IC Role / Device Role / Timing Role: Monitors harvested VCC1 and regulated 1.8V VCC2; uses RSTIN to track harvester output pre-regulator; triggers controlled shutdown before brownout. Use Value: 0.488V RSTIN threshold enables accurate pre-regulator monitoring; SC70 size fits inside IP67 enclosure. |
| POS Terminal Power Management | Medical Diagnostic Handheld |
|
Use Scenario: Portable point-of-sale terminal with 5V USB input, 3.3V I/O, and 1.1V FPGA core. IC Role / Device Role / Timing Role: Uses VCC1=3.3V, VCC2=1.1V, and RSTIN to monitor 5V input via divider; coordinates safe power-down when USB disconnect detected. Use Value: MR input allows user-initiated reset without cycling main power; open-drain RESET interfaces cleanly with FPGA reset controller. |
Use Scenario: FDA-cleared handheld ultrasound probe with dual DC-DC converters and safety-critical boot integrity. IC Role / Device Role / Timing Role: Supervises 3.3V analog front-end supply and 1.8V digital supply; RSTIN monitors battery health; 1200ms timeout satisfies IEC 62304 boot validation window. Use Value: Factory-trimmed thresholds eliminate calibration overhead; -40°C to +85°C rating covers clinical and field environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6738XKTD3+ | Same dual-supply architecture and pinout, but 150ms reset timeout (D3 suffix) instead of 1200ms | Suitable for fast-boot microcontrollers where long reset hold is unnecessary | Select D3 for cost-sensitive consumer devices with short boot sequences; D7 required for complex firmware initialization |
| TPS3808G125DBVR | TI dual-supervisor with 1.25V fixed VDD1 threshold, 1.25V adjustable VDD2 via resistor, 200ms timeout, 1.6µA ICC | Lacks RSTIN flexibility; only supports monitoring down to ~1.25V without external scaling | Choose TPS3808G125DBVR for ultra-low-current applications where 1.25V minimum threshold suffices and shorter timeout is acceptable |
Compared with MAX6738XKVD7+, the MAX6738XKTD3+ offers faster reset release but sacrifices robustness for slow-ramping supplies, while the TPS3808G125DBVR achieves lower current but cannot monitor sub-1.2V rails without added components - making MAX6738XKVD7+ uniquely suited for deep-sleep, multi-rail embedded systems.
Availability
MAX6738XKVD7+ is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, POS terminals, and medical diagnostic handhelds requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6738XKVD7+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6736–MAX6745 family was designed specifically for space-constrained, battery-operated systems needing dual/triple supply supervision with ultra-low quiescent current and flexible threshold configuration - targeting portable computing, instrumentation, and edge IoT endpoints.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6738XKVD7+?
The MAX6738XKVD7+ 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 "V" suffix in the part number per Table 2 of the datasheet and applies specifically to the MAX6738XKVD7+ variant.
Does the MAX6738XKVD7+ support monitoring a 1.0V core supply?
Yes - the MAX6738XKVD7+ supports monitoring a 1.0V core supply using the RSTIN pin. With its 0.488V internal reference, an external resistor divider can scale the 1.0V rail to match the threshold. For example, a 1MΩ/500kΩ divider yields 0.333V at RSTIN, ensuring reliable detection below 0.488V.
What is the function of the MR pin on the MAX6738XKVD7+?
The MR (Manual Reset) pin on the MAX6738XKVD7+ is an active-low input that forces the RESET output low when pulled to GND for ≥1µs. After release, RESET remains low for the full 1200ms timeout period. An internal 1.5kΩ pullup to VCC1 means no external resistor is needed if MR is unused.
Can the MAX6738XKVD7+ be used in a system with only one supply voltage?
Yes - the MAX6738XKVD7+ can supervise a single supply by connecting VCC2 to GND or leaving it unconnected (per datasheet guidance), while using VCC1 and RSTIN for dual monitoring. Its architecture inherently supports single-rail operation without performance penalty or configuration change.
Is the MAX6738XKVD7+ RoHS-compliant and lead-free?
Yes - the "+" suffix in MAX6738XKVD7+ explicitly denotes lead-free, RoHS-compliant packaging per Maxim Integrated's ordering conventions. It meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering up to 260°C peak temperature.
MAX6738XKVD7+ 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:
- 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
MAX6738XKVD7+ FAQ
1.How can I place an order for MAX6738XKVD7+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6738XKVD7+ 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 MAX6738XKVD7+ reliable?
The price and inventory of MAX6738XKVD7+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6738XKVD7+ is usually 5 days.
3.What payment methods are accepted for MAX6738XKVD7+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6738XKVD7+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6738XKVD7+?
MAX6738XKVD7+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6738XKVD7+ 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 MAX6738XKVD7+?
For technical support, including MAX6738XKVD7+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6738XKVD7+ requirements.
6.How does Aetrix verify that MAX6738XKVD7+ is sourced from the original manufacturer or authorized distributors?
All MAX6738XKVD7+ 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 MAX6738XKVD7+ meets industry standards.
7.What is the process for return or replacement of MAX6738XKVD7+?
All MAX6738XKVD7+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6738XKVD7+, 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 MAX6738XKVD7+ part is unused and in its original packaging.
Return procedure for MAX6738XKVD7+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6738XKVD7+ Tags
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MIC826SYMT-TR
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