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Analog Devices Inc./Maxim Integrated MAX6365LKA26+T
- Part No.:
- MAX6365LKA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365LKA26+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:14,721
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Product details
Overview
MAX6365LKA26+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery backup, chip-enable gating, and manual reset input. It provides active-low push-pull reset output, monitors VCC down to 1.2V, features factory-preset 2.63V reset threshold (±70mV), guarantees RESET assertion down to 1.2V supply, and delivers 150ms minimum reset timeout - used in portable equipment requiring reliable power-fail detection and SRAM write protection.
For engineers reviewing the MAX6365LKA26+T datasheet, MAX6365LKA26+T pinout, MAX6365LKA26+T application, or MAX6365LKA26+T equivalent, key selection criteria include reset threshold accuracy (2.55V–2.70V range), VCC-to-OUT on-resistance (4.6Ω typ at 2.38V), 10µA quiescent current, battery-switchover hysteresis (40mV), and CE IN-to-CE OUT propagation delay (2–9ns).
Technical Context
The MAX6365LKA26+T integrates four core functions: (1) precision VCC monitoring with ±0.07V threshold tolerance over temperature; (2) seamless VCC-to-battery switchover via internal MOSFET with 40mV hysteresis; (3) chip-enable signal gating with 1.5ns propagation delay and <100Ω on-resistance; and (4) debounced manual reset input with 20kΩ internal pullup and 120ns MR-to-reset delay.
It operates across -40°C to +85°C, supports 1.2V–5.5V VCC and VBATT inputs, asserts RESET during power-up/down/brownout, maintains CE OUT low for 12µs after CE IN goes low during reset, and guarantees functional operation with VCC or VBATT as low as 1.2V - enabling robust data retention in battery-backed CMOS RAM systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (typ), 2.55V–2.70V range - ensures reliable reset assertion for 2.5V logic systems with margin against supply droop. |
| Reset Timeout Period | 150ms (min), 280ms (max) - guarantees µP initialization completes before release from reset. |
| Quiescent Supply Current | 10µA (typ) at VCC = 5.5V - enables multi-year battery life in always-on backup mode. |
| VCC-to-OUT On-Resistance | 4.6Ω (typ) at VCC = 2.38V, IOUT = 25mA - minimizes voltage drop when sourcing up to 150mA to SRAM. |
| CE IN-to-CE OUT Delay | 2–9ns (typ) - supports high-speed µP/DSP interfaces without timing violation. |
| Battery-Backup Current | 3µA (max) at VBATT = 2.8V, VCC = 0V - preserves coin-cell lifetime in long-term storage. |
| MR Input Pullup | 20kΩ internal resistor - eliminates external components for momentary switch interface. |
Pinout & Package
MAX6365LKA26+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead(Pb)-free, rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low push-pull reset output | Drives µP /RESET pin directly; sinks 1.6mA min at 0.3V - no external pullup required. |
| 2 CE IN | Chip-enable input | Controls gating path to CE OUT; connect to GND or OUT if unused; 1µA leakage max. |
| 3 GND | Ground reference | Common return for VCC, BATT, and digital logic; must be low-impedance for noise immunity. |
| 4 MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pullup to VCC - compatible with open-drain switches. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT during normal operation. |
| 6 OUT | Power output to SRAM | Switches between VCC and BATT; delivers up to 150mA; regulated by internal MOSFET. |
| 7 BATT | Backup battery input | Connects to coin cell or supercap; activates when VCC falls 20mV below VBATT. |
| 8 CE OUT | Chip-enable output | Gated version of CE IN; held low 12µs during reset to prevent partial SRAM writes. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V ±0.07V - eliminates external resistor divider and calibration in 2.5V system designs. |
| Integrated battery switchover | 40mV hysteresis prevents oscillation during slow VCC decay - avoids repeated SRAM corruption. |
| On-board CE gating | 1.5ns propagation delay and <100Ω on-resistance - preserves timing integrity for fast µPs and DSPs. |
| Debounced manual reset | 120ns MR-to-reset delay and internal 20kΩ pullup - removes need for RC filter or Schmitt trigger. |
| Ultra-low backup current | 3µA max IBACK at VBATT = 2.8V - extends CR2032 life beyond 10 years in standby. |
Applications
| Portable Medical Monitor | Industrial PLC Data Logger |
|---|---|
Use Scenario: Battery-powered ECG monitor retains real-time waveform buffer during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC asserts RESET to halt µP execution and gates CE to freeze SRAM writes while switching OUT from VCC to BATT. Use Value: Prevents data corruption during brownout; 150ms reset timeout ensures clean µP restart after recovery. |
Use Scenario: Factory-floor data logger captures sensor readings into nonvolatile SRAM during grid instability. IC Role / Device Role / Timing Role: MAX6365LKA26+T monitors 3.3V rail, triggers reset on undervoltage, and isolates memory bus via CE gating. Use Value: 2.63V threshold matches 3.3V LDO dropout; 10µA quiescent current enables >5-year battery backup. |
| Retail POS Terminal | Smart Energy Meter |
Use Scenario: Point-of-sale terminal preserves transaction log during brief UPS switchover or capacitor holdup. IC Role / Device Role / Timing Role: Manual reset input (MR) enables field-service recovery; VCC-to-OUT path sustains SRAM from coin cell. Use Value: Internal 20kΩ MR pullup simplifies front-panel button design; 4.6Ω on-resistance limits SRAM VDD sag to <100mV. |
Use Scenario: Electricity meter retains tamper logs and billing cycles during mains outage. IC Role / Device Role / Timing Role: Supervisory circuit detects 2.5V auxiliary rail failure and asserts RESET while enabling BATT-powered RTC/SRAM. Use Value: 2.63V threshold aligns with 2.5V analog supply tolerance; 3µA backup current supports 10-year CR1220 life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365PKA26+T | Same reset threshold (2.63V) and function set, but open-drain active-low RESET output instead of push-pull. | Requires external pullup resistor; suitable where bus-sharing or wired-OR reset topology is needed. | Select PKA26+T only if system design mandates open-drain reset signaling - otherwise LKA26+T reduces BOM count. |
| TPS3808G125DBVR | 1.25V fixed reset threshold, 350ms timeout, 2.5µA IQ, no battery switchover or CE gating. | Limited to basic reset generation; cannot replace MAX6365LKA26+T in battery-backed SRAM systems. | Use TPS3808G125DBVR only for simple VCC monitoring without backup power or memory protection requirements. |
Compared with MAX6365PKA26+T, the MAX6365LKA26+T eliminates external pullup components and simplifies PCB layout; compared with TPS3808G125DBVR, it adds critical battery switchover, CE gating, and manual reset - making it uniquely suited for data-retentive embedded systems.
Availability
MAX6365LKA26+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial data loggers, retail POS terminals, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6365LKA26+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, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.
The MAX6365–MAX6368 family targets space-constrained µP systems needing integrated power supervision, battery backup, and memory write protection - optimized for ultra-low quiescent current and guaranteed 1.2V operation.
FAQ
What is the exact reset threshold voltage of MAX6365LKA26+T?
The MAX6365LKA26+T has a factory-trimmed reset threshold of 2.63V (typical), with guaranteed range of 2.55V to 2.70V across -40°C to +85°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" - it applies directly to the MAX6365LKA26+T and is not adjustable.
Does MAX6365LKA26+T support battery backup for SRAM, and how does switchover work?
Yes, MAX6365LKA26+T supports battery backup for SRAM via its integrated VCC-to-BATT switchover circuit. When VCC falls below the reset threshold and drops 20mV below VBATT, the internal MOSFET connects BATT to OUT. The 40mV hysteresis prevents oscillation during slow VCC decay - ensuring stable SRAM power during brownout. This behavior is fully documented for MAX6365LKA26+T in the "Backup-Battery Switchover" section.
What is the function of the MR pin on MAX6365LKA26+T, and does it require external components?
The MR (Manual Reset) pin on MAX6365LKA26+T is a logic-input that asserts reset when pulled low. It includes a 20kΩ internal pullup to VCC, so no external resistor is needed. A normally open momentary switch from MR to GND provides full manual reset functionality - external debounce circuitry is unnecessary due to built-in filtering. This feature is exclusive to the MAX6365 variant, including MAX6365LKA26+T.
Can MAX6365LKA26+T drive CE signals for high-speed microprocessors?
Yes, MAX6365LKA26+T drives CE signals with 1.5ns typical propagation delay and <100Ω on-resistance, supporting µPs and DSPs operating above 100MHz. The CE IN-to-CE OUT path uses a transmission gate architecture validated at 50Ω source impedance and 50pF load - performance data is confirmed for MAX6365LKA26+T in the "Chip-Enable Signal Gating" section and Typical Operating Characteristics graphs.
What package type and environmental rating does MAX6365LKA26+T use?
MAX6365LKA26+T is supplied in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), lead(Pb)-free and RoHS-compliant, rated for operation from -40°C to +85°C. The "+T" suffix explicitly denotes tape-and-reel packaging with lead-free finish - consistent with Maxim's ordering nomenclature and verified in the Ordering Information table for MAX6365LKA26+T.
MAX6365LKA26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6365LKA26+T FAQ
1.How can I place an order for MAX6365LKA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365LKA26+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 MAX6365LKA26+T reliable?
The price and inventory of MAX6365LKA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365LKA26+T is usually 5 days.
3.What payment methods are accepted for MAX6365LKA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365LKA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365LKA26+T?
MAX6365LKA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365LKA26+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 MAX6365LKA26+T?
For technical support, including MAX6365LKA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365LKA26+T requirements.
6.How does Aetrix verify that MAX6365LKA26+T is sourced from the original manufacturer or authorized distributors?
All MAX6365LKA26+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 MAX6365LKA26+T meets industry standards.
7.What is the process for return or replacement of MAX6365LKA26+T?
All MAX6365LKA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365LKA26+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 MAX6365LKA26+T part is unused and in its original packaging.
Return procedure for MAX6365LKA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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