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Analog Devices Inc./Maxim Integrated MAX6365LKA31+T
- Part No.:
- MAX6365LKA31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365LKA31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,288
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Product details
Overview
MAX6365LKA31+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 at 3.08V threshold (±2%), operates down to 1.2V supply, delivers up to 150mA from VCC or battery, and ensures 150ms minimum reset timeout - used in portable POS terminals and industrial controllers requiring reliable power-fail recovery.
For engineers reviewing the MAX6365LKA31+T datasheet, MAX6365LKA31+T pinout, MAX6365LKA31+T application, or MAX6365LKA31+T equivalent, key selection criteria include reset threshold accuracy (3.00–3.15V), VCC-to-battery switchover hysteresis (40mV), CE IN to CE OUT propagation delay (≤9ns), 10µA quiescent current, and guaranteed RESET assertion down to 1.2V VCC or VBATT.
Technical Context
The MAX6365LKA31+T integrates a precision voltage monitor, manual reset debouncer, battery switchover MOSFET controller, and chip-enable transmission gate. Its internal 20kΩ MR pullup enables direct switch connection without external components, while the CE path uses a low-on-resistance series gate with 1.5ns typical propagation delay for SRAM write protection during brownout.
Reset assertion is triggered by VCC falling below 3.08V, MR logic-low input, or power-up sequencing; reset remains asserted for ≥150ms after VCC rises above threshold. Battery switchover activates only when both VCC < VTH and VCC < (VBATT − 20mV), with 40mV hysteresis preventing oscillation during slow VCC decay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ), 3.00–3.15V range - sets precise power-fail detection point for +3.3V systems |
| Reset Timeout Period | 150–280ms - guarantees µP initialization completes before release |
| Supply Current | 10–50µA (no load) - enables multi-year battery backup in portable devices |
| VCC Operating Range | 1.2V to 5.5V - supports ultra-low-voltage operation and legacy 5V designs |
| CE IN to CE OUT Delay | 2–9ns - preserves timing integrity for high-speed µP address/data bus gating |
| Battery Switchover Hysteresis | 40mV - prevents chattering during gradual VCC brownout |
| Output Drive | Push-pull active-low RESET - eliminates need for external pullup resistor |
Pinout & Package
MAX6365LKA31+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount compatible with standard reflow profiles and IPC-7351B footprint MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP /RESET directly; no external pullup required; asserts low during VCC brownout or MR activation |
| 2 - CE IN | Chip-enable input | Connects to µP CE signal; gated internally to prevent SRAM corruption during power failure |
| 3 - GND | Ground reference | Common return for all analog and digital functions; must be low-impedance for accurate threshold sensing |
| 4 - MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pullup to VCC enables momentary switch interface |
| 5 - VCC | Main supply input | Primary power source (1.2–5.5V); monitored for reset generation and powers internal circuitry |
| 6 - OUT | Power output | Sources from VCC normally; switches to BATT during brownout; delivers up to 150mA |
| 7 - BATT | Backup battery input | Accepts 2.0–5.5V battery; enables seamless RAM retention when VCC fails |
| 8 - CE OUT | Chip-enable output | Gated version of CE IN; held low during reset to block erroneous memory writes |
Key Features
| Feature | Design Value |
|---|---|
| On-board CE gating | 1.5ns propagation delay prevents SRAM corruption during µP reset, eliminating need for external logic |
| Debounced manual reset | Internal MR filtering removes switch bounce; no external RC network required for reliable user-initiated reset |
| Battery switchover control | Automatic VCC/BATT handoff with 40mV hysteresis ensures glitch-free RAM power continuity |
| Low 10µA quiescent current | Extends backup battery life to >5 years in always-on monitoring applications (e.g., smart meters) |
| 1.2V guaranteed operation | Enables use with emerging ultra-low-voltage µPs and energy-harvesting power supplies |
Applications
| POS Terminal Power Management | Industrial PLC Memory Backup |
|---|---|
Use Scenario: Portable point-of-sale terminal with lithium coin-cell backup maintaining SRAM during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, battery switchover, and CE gating to preserve transaction logs. Use Value: Prevents data loss during 100ms–2s brownouts via 150ms reset hold time and sub-10ns CE disable latency. | Use Scenario: Programmable logic controller retaining configuration and I/O state during factory mains interruption. IC Role / Device Role / Timing Role: Dual-role supervisor: reset generator for ARM Cortex-M core and CE gate for external FRAM. Use Value: Guarantees µP reset assertion until stable VCC returns, while blocking write cycles to nonvolatile memory during fault. |
| Medical Infusion Pump Safety Monitor | Smart Meter Real-Time Clock Hold |
Use Scenario: Battery-backed infusion pump requiring fail-safe shutdown and log preservation during power transition. IC Role / Device Role / Timing Role: Safety-critical reset supervisor with manual reset override and battery-backed clock domain isolation. Use Value: Ensures deterministic reset behavior under EMI-induced VCC transients (immune to ≤30µs/100mV glitches). | Use Scenario: Utility meter using supercapacitor backup to sustain RTC and tamper-detection circuitry for 10+ years. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling long-term battery-backed timekeeping with CE gating for secure NVM access. Use Value: 3µA battery-backup mode current extends supercapacitor hold-up time beyond regulatory 10-year requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365PKA31+T | Same reset threshold (3.08V), but open-drain active-low RESET output instead of push-pull | Requires external pullup resistor; suitable where bus-sharing or wired-OR reset lines are needed | Select when system-level reset bus architecture mandates open-drain topology |
| TPS3808G33DBVR | 3.3V fixed threshold, 350ms timeout, 2.9µA IQ, SOT23-6 package - no battery switchover or CE gating | Basic reset-only function; lacks backup power management and memory write protection features | Choose only if battery backup and CE gating are unnecessary and longer timeout is acceptable |
Compared with MAX6365PKA31+T, the MAX6365LKA31+T eliminates external pullup components and simplifies layout, while TPS3808G33DBVR reduces cost and current draw but forfeits critical battery-switchover and chip-enable functionality required for data-retentive systems.
Availability
MAX6365LKA31+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, medical infusion pumps, and smart meters requiring stable component supply across extended product lifecycles.
Supply support for MAX6365LKA31+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 in industrial, automotive, and computing markets.
The MAX6365–MAX6368 family targets space-constrained µP systems needing integrated power supervision, battery backup, and memory write protection - optimized for reliability in portable and mission-critical equipment.
FAQ
What is the exact reset threshold voltage for MAX6365LKA31+T?
The MAX6365LKA31+T has a factory-preset reset threshold of 3.08V (typical), with a guaranteed range of 3.00V to 3.15V over temperature (−40°C to +85°C). This value is laser-trimmed during production and applies specifically to the "31" suffix variant, as confirmed in the Reset Threshold Ranges table and Electrical Characteristics section of the official datasheet.
Does MAX6365LKA31+T support battery backup for CMOS RAM?
Yes, MAX6365LKA31+T supports battery backup for CMOS RAM via its integrated VCC/BATT switchover circuit. When VCC falls below the 3.08V threshold and drops 20mV below VBATT, the device automatically connects the backup battery to the OUT pin, sustaining RAM power. The 40mV hysteresis prevents oscillation, and the internal MOSFET delivers up to 150mA from VCC or battery.
What is the function of the MR pin on MAX6365LKA31+T?
The MR (Manual Reset) pin on MAX6365LKA31+T is a debounced, internally pulled-up (20kΩ to VCC) input that asserts the active-low RESET output when driven low. Reset remains asserted for ≥150ms after MR returns high. This enables reliable user-initiated reset using a simple momentary switch to GND, with no external debounce components required.
Can MAX6365LKA31+T operate with a 1.2V supply?
Yes, MAX6365LKA31+T is fully specified to operate from 1.2V to 5.5V on VCC or VBATT. Its reset output remains valid down to 1.2V, and quiescent current stays within 10–50µA across this range. This enables compatibility with ultra-low-voltage microcontrollers and energy-harvesting power sources, as verified in the Absolute Maximum Ratings and Electrical Characteristics tables.
How does the chip-enable gating work in MAX6365LKA31+T?
The MAX6365LKA31+T gates the CE signal via an internal transmission gate between CE IN and CE OUT. During normal operation, CE IN passes through with ≤9ns propagation delay. When RESET asserts, CE OUT is immediately disabled - held low for 12µs if CE IN was low, or driven high if CE IN was high - preventing erroneous SRAM writes during power faults.
MAX6365LKA31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6365LKA31+T FAQ
1.How can I place an order for MAX6365LKA31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365LKA31+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 MAX6365LKA31+T reliable?
The price and inventory of MAX6365LKA31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365LKA31+T is usually 5 days.
3.What payment methods are accepted for MAX6365LKA31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365LKA31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365LKA31+T?
MAX6365LKA31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365LKA31+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 MAX6365LKA31+T?
For technical support, including MAX6365LKA31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365LKA31+T requirements.
6.How does Aetrix verify that MAX6365LKA31+T is sourced from the original manufacturer or authorized distributors?
All MAX6365LKA31+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 MAX6365LKA31+T meets industry standards.
7.What is the process for return or replacement of MAX6365LKA31+T?
All MAX6365LKA31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365LKA31+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 MAX6365LKA31+T part is unused and in its original packaging.
Return procedure for MAX6365LKA31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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