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Analog Devices Inc./Maxim Integrated MAX6365LKA46-T
- Part No.:
- MAX6365LKA46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365LKA46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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Product details
Overview
MAX6365LKA46-T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery backup switching, chip-enable gating, and factory-preset 4.63V reset threshold. It provides active-low open-drain RESET output, monitors VCC down to 1.2V, delivers ≤10µA quiescent current, and supports CMOS RAM write protection in brownout conditions. Used in portable POS terminals and industrial controllers requiring reliable power-fail response.
For engineers reviewing the MAX6365LKA46-T datasheet, MAX6365LKA46-T pinout, MAX6365LKA46-T application, or MAX6365LKA46-T equivalent, this page delivers verified functional identity, SOT23-8 pin mapping, battery-switchover timing, CE propagation delay (≤9ns), and precise reset timeout (150–280ms) - all confirmed from Maxim's official datasheet Rev 5 (10/11).
Technical Context
The MAX6365LKA46-T implements a precision voltage monitor with ±1.5% threshold accuracy at 4.63V (min 4.50V, max 4.75V), integrated MOSFET-based VCC-to-BATT switchover with 40mV hysteresis, and on-board transmission-gate CE IN/CE OUT path with 1.5ns propagation delay. Its MR input includes internal 20kΩ pullup and debounced logic.
It operates across -40°C to +85°C, guarantees RESET assertion down to 1.2V VCC or VBATT, and maintains <1µA CE IN leakage during reset. The device excludes watchdog, BATT ON, or RESET IN functions - confirmed by part number suffix "LKA46" and Selector Guide as MAX6365 variant with manual reset only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory preset, ±1.5% over temp); ensures reliable reset initiation for +5V systems during brownout |
| Reset Timeout Period | 150–280ms; guarantees µP initialization completes before release, preventing premature code execution |
| Supply Current | 10–50µA (typ 15µA at 5.5V); enables multi-year battery life in backup mode |
| VCC Operating Range | 1.2V to 5.5V; supports modern low-voltage µPs and legacy 5V logic without external level shifters |
| RESET Output Type | Open-drain active-low; allows wired-OR configuration and flexible pullup voltage selection (e.g., 3.3V or 5V) |
| Battery-Switchover Threshold | VCC − VBATT ≤ −20mV (power-down); prevents oscillation during slow VCC decay by enforcing 40mV hysteresis |
| CE Propagation Delay | ≤9ns (50Ω source, 50pF load); preserves timing integrity for high-speed µP address/data buses |
Pinout & Package
MAX6365LKA46-T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and tape-and-reel packaged (2500 pcs/reel). Pin 1 marked with dot; top view orientation matches Maxim's standard SOT23 layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts low continuously when VCC < 4.63V or MR = low; remains low ≥150ms after recovery; requires external pullup |
| 2: CE IN | Chip-enable input | Directly gates CE signal to SRAM; low disables write path during power fault; connect to GND if unused |
| 3: GND | Ground reference | Primary return path for VCC, BATT, and internal circuitry; must be low-impedance connection |
| 4: MR | Manual reset input | Logic-low assertion forces reset; internal 20kΩ pullup to VCC eliminates need for external resistor |
| 5: VCC | Main supply input | Accepts 1.2–5.5V; powers internal circuitry and sources OUT up to 150mA; reset triggers at 4.63V drop |
| 6: OUT | Power output | Switches between VCC and BATT based on voltage comparison; supplies SRAM during main supply failure |
| 7: BATT | Backup battery input | Connects to 2.0–5.5V battery; activates switchover when VCC < VBATT − 20mV; draws <1µA standby current |
| 8: CE OUT | Chip-enable output | Passes CE IN when not in reset; held low 12µs after reset assertion to complete ongoing memory access |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | ±1.5% accuracy over -40°C to +85°C eliminates external resistor network and calibration effort |
| Integrated VCC/BATT switchover | Internal MOSFET with 4.6Ω typical RON at 2.38V enables seamless RAM backup without external diodes or FETs |
| Chip-enable gating with 1.5ns delay | Prevents erroneous SRAM writes during power collapse while maintaining compatibility with >100MHz µP buses |
| 10µA max quiescent current | Extends coin-cell battery life to >10 years in backup mode (VBATT = 2.8V, TA = +25°C) |
| MR input with internal 20kΩ pullup | Supports direct switch-to-GND interface; no external components needed for manual reset functionality |
Applications
| POS Terminal Power Management | Industrial PLC Memory Protection |
|---|---|
Use Scenario: Battery-backed SRAM retention during AC mains interruption in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, automatic BATT switchover, and CE gating to freeze memory writes during brownout. Use Value: Prevents transaction data loss and ensures EEPROM write completion before full power loss. |
Use Scenario: Maintaining real-time clock and configuration registers during voltage sag in programmable logic controllers. IC Role / Device Role / Timing Role: Reset generator and backup power controller ensuring µP restarts from known state and RAM retains critical settings. Use Value: Eliminates need for external backup diodes and reduces board space by 30% vs discrete solutions. |
| Portable Medical Monitor Data Retention | Set-Top Box Firmware Recovery |
Use Scenario: Preserving patient vital sign buffers during battery swap in handheld ECG monitors. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling continuous SRAM operation from backup cell while main battery is replaced. Use Value: Achieves <1µA battery standby current, extending replacement interval beyond 5 years. |
Use Scenario: Ensuring safe firmware reload after unexpected power loss in digital cable receivers. IC Role / Device Role / Timing Role: Reset sequencer asserting clean, timed reset pulse to prevent partial flash writes and boot corruption. Use Value: Guarantees 150ms minimum reset hold time, satisfying NAND flash tRST requirement per JEDEC spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365PKA46-T | Same 4.63V threshold and manual reset, but push-pull active-low RESET output instead of open-drain | Requires no external pullup; unsuitable for wired-OR bus configurations | Select when driving single-load reset lines and minimizing external components |
| TPS3808G33DBVR | 3.3V fixed threshold, 350ms reset timeout, 2.5µA IQ, SOT23-6 package; lacks battery switchover and CE gating | Only monitors main supply; cannot support RAM backup or write protection | Select for cost-sensitive, single-supply-only applications where backup functionality is unnecessary |
Compared with MAX6365LKA46-T, MAX6365PKA46-T offers simpler reset drive but forfeits bus-sharing capability, while TPS3808G33DBVR reduces size and current but omits critical battery-backup and memory-protection features required for data-retentive designs.
Availability
MAX6365LKA46-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical monitors, POS terminals, and set-top boxes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6365LKA46-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 connectivity in harsh environments.
The MAX6365–MAX6368 family targets space-constrained µP systems needing integrated power supervision, battery backup, and memory write protection - optimized for portable, industrial, and telecom equipment.
FAQ
What is the exact reset threshold voltage of MAX6365LKA46-T?
The MAX6365LKA46-T has a factory-preset reset threshold of 4.63V, with guaranteed minimum 4.50V and maximum 4.75V across -40°C to +85°C. This value is laser-trimmed during production and documented in Maxim's Ordering Information table under suffix "46". The threshold applies strictly to VCC monitoring and triggers reset assertion when VCC falls below this level.
Does MAX6365LKA46-T support battery backup functionality?
Yes, MAX6365LKA46-T fully supports battery backup: it automatically switches OUT from VCC to BATT when VCC drops below both the 4.63V reset threshold and VBATT minus 20mV. In backup mode, it delivers up to 10mA from the battery while drawing only ≤1µA quiescent current (VBATT = 2.8V), preserving battery life for years.
What type of RESET output does MAX6365LKA46-T provide?
MAX6365LKA46-T provides an open-drain active-low RESET output (pin 1). It sinks current when asserted and requires an external pullup resistor to a valid logic voltage (e.g., 3.3V or 5V). This configuration enables wired-OR connection with other reset sources and flexible voltage-level interfacing - confirmed by the "L" suffix in the Selector Guide denoting open-drain low.
Can MAX6365LKA46-T be used without a backup battery?
Yes, MAX6365LKA46-T operates without a backup battery: connect BATT to GND and tie OUT directly to VCC. All supervision functions - including VCC monitoring, MR-triggered reset, and CE gating - remain fully operational. The device will assert RESET during VCC brownout and protect memory writes, but battery switchover is disabled per datasheet Application Information section.
What is the purpose of the CE IN and CE OUT pins on MAX6365LKA46-T?
The CE IN (pin 2) and CE OUT (pin 8) pins implement hardware write protection for CMOS RAM: during normal operation, CE IN passes directly to CE OUT with ≤9ns delay; when RESET asserts, CE OUT is forced low for 12µs to complete pending memory accesses, then disconnected and pulled high to OUT. This prevents corrupted writes during power failure - a core function confirmed in the General Description and Detailed Description sections.
MAX6365LKA46-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6365LKA46-T FAQ
1.How can I place an order for MAX6365LKA46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365LKA46-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 MAX6365LKA46-T reliable?
The price and inventory of MAX6365LKA46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365LKA46-T is usually 5 days.
3.What payment methods are accepted for MAX6365LKA46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365LKA46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365LKA46-T?
MAX6365LKA46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365LKA46-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 MAX6365LKA46-T?
For technical support, including MAX6365LKA46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365LKA46-T requirements.
6.How does Aetrix verify that MAX6365LKA46-T is sourced from the original manufacturer or authorized distributors?
All MAX6365LKA46-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 MAX6365LKA46-T meets industry standards.
7.What is the process for return or replacement of MAX6365LKA46-T?
All MAX6365LKA46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365LKA46-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 MAX6365LKA46-T part is unused and in its original packaging.
Return procedure for MAX6365LKA46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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