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Analog Devices Inc./Maxim Integrated MAX6365PKA46+T
- Part No.:
- MAX6365PKA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365PKA46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
MAX6365PKA46+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 from 1.2V to 5.5V, delivers up to 150mA from VCC or battery, and ensures reliable reset assertion during power-up, brownout, and power-down in µP systems with CMOS RAM or real-time clocks.
For engineers reviewing the MAX6365PKA46+T datasheet, MAX6365PKA46+T pinout, MAX6365PKA46+T application, or MAX6365PKA46+T equivalent, key selection considerations include its 4.63V reset threshold tolerance (±0.13V), 150ms minimum reset timeout, 10µA quiescent current, battery switchover hysteresis (40mV), and SOT23-8 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6365PKA46+T integrates a precision voltage monitor, debounced manual reset input (MR), bidirectional VCC/BATT switchover MOSFET, and CE signal transmission gate. Its internal 20kΩ MR pullup enables direct switch-to-GND interfacing without external components.
Reset generation is triggered by VCC falling below 4.63V, MR low assertion, or external fault conditions - with guaranteed RESET assertion down to 1.2V supply and 1.5ns CE propagation delay for high-speed µP interface integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory preset, ±0.13V over -40°C to +85°C) - ensures reliable detection of +5V supply brownout before system instability. |
| Reset Timeout Period | 150ms min - guarantees µP initialization completes before code execution resumes after power recovery. |
| Supply Current | 15µA typical at 5.5V - enables multi-year operation in battery-backed SRAM retention applications. |
| VCC Operating Range | 1.2V to 5.5V - supports direct interface with 1.2V/1.8V/2.5V/3.3V/5V logic domains without level shifting. |
| Battery Switchover Hysteresis | 40mV - prevents oscillatory switching during slow VCC decay near VBATT crossover point. |
| CE Propagation Delay | 1.5ns - preserves timing margins for high-speed address/data gating in µP-based memory subsystems. |
| Output Drive Capability | 150mA from VCC, 20mA from BATT - powers SRAM directly without external pass devices. |
Pinout & Package
MAX6365PKA46+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low during VCC < 4.63V, MR low, or power failure; requires external pullup for µP reset input interface. |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low disables write access during reset to prevent data corruption. |
| 3 GND | Ground reference | Common return path for VCC, BATT, and digital logic; must be low-impedance for noise immunity. |
| 4 MR | Manual reset input | Debounced logic input with 20kΩ internal pullup; low assertion forces reset regardless of VCC state. |
| 5 VCC | Main supply input | Primary power source (1.2–5.5V); powers internal circuitry and supplies OUT when above reset threshold. |
| 6 OUT | Regulated output | Switches between VCC and BATT based on voltage comparison; sources up to 150mA to SRAM or RTC. |
| 7 BATT | Battery backup input | Accepts 2.0–5.5V backup source; activates when VCC falls 20mV below VBATT and remains active until VCC rises 20mV above. |
| 8 CE OUT | Chip-enable output | Passes CE IN when reset inactive; held low for 12µs after reset assertion to complete ongoing memory cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor network for +5V supply monitoring, reducing BOM count and layout area. |
| Integrated VCC/BATT switchover MOSFET | Enables seamless transition to backup power without external diodes or controllers, minimizing voltage drop (<0.2V at 25mA). |
| On-board CE signal gating | Prevents erroneous writes to CMOS RAM during brownout via sub-2ns propagation delay and automatic hold-off during reset. |
| 10µA quiescent supply current | Extends battery life in always-on backup mode - draws only 3µA from battery when VCC = 0V and VBATT = 2.8V. |
| MR input with internal 20kΩ pullup | Supports direct connection of momentary switch to GND; eliminates need for external pullup resistor and debounce RC network. |
Applications
| Industrial Control Systems | Point-of-Sale Terminals |
|---|---|
|
Use Scenario: Maintaining SRAM contents during AC mains interruption or brownout in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory controller providing reset assertion, battery-backed memory power, and CE gating to preserve configuration data. Use Value: Guarantees deterministic µP restart and zero-data-loss memory retention for >10 years on coin-cell backup. |
Use Scenario: Securing transaction logs and firmware state in retail terminals subject to frequent unplanned power loss. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 5V rail for brownout and gates CE to prevent partial-write corruption during power collapse. Use Value: Eliminates need for supercapacitor hold-up circuits while meeting PCI PTS 6.0 data integrity requirements. |
| Set-Top Box Firmware Storage | Portable Medical Devices |
|
Use Scenario: Preserving channel lineup, parental controls, and EPG data across power cycles in consumer STBs. IC Role / Device Role / Timing Role: Power management IC delivering regulated 3.3V to serial EEPROM and asserting reset to ARM Cortex-A53 during VCC sag. Use Value: Enables use of low-cost unregulated 5V wall adapters without risk of firmware corruption during line sags. |
Use Scenario: Retaining calibration coefficients and patient history in battery-powered glucose meters during battery replacement. IC Role / Device Role / Timing Role: Battery switchover manager ensuring continuous power to nonvolatile memory during main battery swap. Use Value: Supports hot-swap battery operation with <12µs CE hold time - meets IEC 62304 Class B safety-critical timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365HKA46+T | Same 4.63V threshold and SOT23-8 package, but push-pull active-low RESET output instead of open-drain. | Requires no external pullup resistor; better suited for driving µP reset inputs with weak internal pullups. | Select when board-level pullup is omitted and µP reset pin lacks sufficient internal pullup strength. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 350ms timeout, 2.9µA IQ, SOT23-6 package - no battery switchover or CE gating. | Limited to single-rail monitoring; cannot replace MAX6365PKA46+T in battery-backed memory systems. | Choose only for cost-sensitive, non-backup applications where 4.63V threshold and CE control are unnecessary. |
Compared with MAX6365HKA46+T, the MAX6365PKA46+T offers greater flexibility with open-drain output for wired-OR reset buses; versus TPS3808G33DBVR, it delivers full battery backup functionality and chip-enable protection essential for SRAM-based systems.
Availability
MAX6365PKA46+T is available at Aetrix Electronics and suitable for industrial control systems, point-of-sale terminals, set-top boxes, and portable medical devices requiring stable component supply with long-term lifecycle support.
Supply support for MAX6365PKA46+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 interface applications in demanding environments.
The MAX6365–MAX6368 family targets µP-based systems needing integrated power supervision, battery backup, and memory write protection - specifically engineered for reliability in brownout-prone industrial and consumer equipment.
FAQ
What is the exact reset threshold voltage for MAX6365PKA46+T?
The MAX6365PKA46+T features a factory-trimmed reset threshold of 4.63V, with guaranteed tolerance of ±0.13V over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and does not require external calibration. The threshold is referenced internally and remains stable across supply voltage variations, making MAX6365PKA46+T suitable for precise +5V rail monitoring in mission-critical applications.
Does MAX6365PKA46+T support battery backup functionality?
Yes, MAX6365PKA46+T fully supports battery backup operation. When VCC drops below the 4.63V reset threshold and falls 20mV below VBATT, the device automatically switches OUT from VCC to the backup battery source. It maintains this state until VCC rises 20mV above VBATT, with 40mV hysteresis preventing chatter. The internal MOSFET delivers up to 20mA from battery, and quiescent current in backup mode is just 3µA at VBATT = 2.8V - enabling multi-year operation on standard coin cells.
What is the function of the CE IN and CE OUT pins on MAX6365PKA46+T?
The CE IN and CE OUT pins implement hardware-enforced chip-enable gating to prevent memory corruption during power faults. During normal operation, CE IN passes directly to CE OUT with 1.5ns propagation delay. When reset asserts, CE OUT is held low for 12µs to complete any active memory cycle, then disconnected and pulled up to OUT. This ensures no spurious writes occur to SRAM during brownout - a critical feature confirmed in MAX6365PKA46+T's functional diagram and timing specifications.
Can MAX6365PKA46+T operate with a 1.2V supply voltage?
Yes, MAX6365PKA46+T operates with VCC as low as 1.2V, and its RESET output remains valid down to 1.2V - meaning it can assert reset even when the main supply collapses near the minimum logic threshold. This capability is explicitly guaranteed in the Electrical Characteristics table and enables robust supervision in ultra-low-voltage systems such as energy-harvesting sensors or deep-sleep IoT nodes where supply rails dip below 1.8V during standby.
What package type and pin count does MAX6365PKA46+T use?
MAX6365PKA46+T uses an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm body size), with standardized pinout matching the MAX6365 family. Pin 1 is RESET (active-low open-drain), pin 4 is MR (manual reset input), pin 5 is VCC, pin 6 is OUT, pin 7 is BATT, and pin 8 is CE OUT. This compact footprint supports high-density layouts and is compatible with standard SMT reflow profiles for lead-free assembly.
MAX6365PKA46+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:
- 4.63V
- Output:
- Open Drain or Open Collector
- 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
MAX6365PKA46+T FAQ
1.How can I place an order for MAX6365PKA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365PKA46+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 MAX6365PKA46+T reliable?
The price and inventory of MAX6365PKA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365PKA46+T is usually 5 days.
3.What payment methods are accepted for MAX6365PKA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365PKA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365PKA46+T?
MAX6365PKA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365PKA46+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 MAX6365PKA46+T?
For technical support, including MAX6365PKA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365PKA46+T requirements.
6.How does Aetrix verify that MAX6365PKA46+T is sourced from the original manufacturer or authorized distributors?
All MAX6365PKA46+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 MAX6365PKA46+T meets industry standards.
7.What is the process for return or replacement of MAX6365PKA46+T?
All MAX6365PKA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365PKA46+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 MAX6365PKA46+T part is unused and in its original packaging.
Return procedure for MAX6365PKA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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