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Analog Devices Inc./Maxim Integrated MAX6365HKA23+T
- Part No.:
- MAX6365HKA23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365HKA23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,517
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Product details
Overview
MAX6365HKA23+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup switching, chip-enable gating, and debounced manual reset input. It operates from 1.2V to 5.5V, features a factory-preset 2.32V reset threshold, 150ms minimum reset timeout, 10µA quiescent current, and delivers up to 150mA from VCC or backup battery - used in portable POS terminals and industrial controllers for reliable power-up/down/brownout reset and SRAM data retention.
For engineers reviewing the MAX6365HKA23+T datasheet, MAX6365HKA23+T pinout, MAX6365HKA23+T application, or MAX6365HKA23+T equivalent, key selection criteria include its SOT23-8 package, open-drain active-high RESET output, 2.32V reset threshold tolerance (±0.06V), battery switchover hysteresis (40mV), and guaranteed RESET/RESET validity down to 1.2V supply.
Technical Context
The MAX6365HKA23+T integrates four core functions: (1) precise VCC monitoring with ±1.5% threshold accuracy over temperature; (2) seamless VCC-to-battery switchover via internal MOSFET with <4.6Ω on-resistance at 2.38V; (3) 1.5ns chip-enable propagation delay for high-speed µP interface protection; and (4) debounced manual reset input with 20kΩ internal pullup and 120ns MR-to-RESET delay.
It implements a dedicated reset generator with 150–280ms timeout period, supports dual-supply operation (VCC and VBATT), maintains CE OUT logic state during reset assertion, and guarantees functional operation down to 1.2V - enabling use in ultra-low-voltage battery-powered systems where supply rail collapse must trigger deterministic reset and memory write protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25V (min) to 2.38V (max); ensures reliable reset assertion before 3.3V/2.5V logic rails fall below valid operating range |
| Reset Timeout Period | 150ms (min); guarantees µP initialization completes before release from reset |
| Supply Current | 10µA typical at +25°C; enables multi-year battery life in always-on backup mode |
| VCC-to-OUT On-Resistance | 4.6Ω max at 2.38V/25mA; minimizes voltage drop during high-current SRAM power delivery |
| Battery-Backup Quiescent Current | 3µA max at -40°C to +85°C; preserves backup battery charge during extended power loss |
| CE IN to CE OUT Propagation Delay | 2ns to 9ns; supports >100MHz µP bus timing without CE signal corruption |
| Operating Voltage Range | 1.2V to 5.5V; allows direct integration with Li-ion, coin-cell, and standard logic supplies |
Pinout & Package
MAX6365HKA23+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained portable and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC undervoltage, MR low, or brownout; requires external pullup for logic-level compatibility |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low disables write path during fault conditions |
| 3 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance for accurate threshold sensing |
| 4 MR | Manual reset input | Debounced logic input with 20kΩ internal pullup; asserts reset when pulled low |
| 5 VCC | Main supply input | Primary power source (1.2–5.5V); powers device and supplies OUT during normal operation |
| 6 OUT | Power output | Switches between VCC and BATT; sources up to 150mA to SRAM or real-time clock |
| 7 BATT | Backup battery input | Accepts 2.0–5.5V backup source; activates when VCC falls 20mV below VBATT |
| 8 CE OUT | Chip-enable output | Passes CE IN only when reset inactive; held low for 12µs after reset assertion to complete ongoing memory access |
Key Features
| Feature | Design Value |
|---|---|
| On-board chip-enable gating | 1.5ns propagation delay prevents erroneous SRAM writes during power faults |
| Debounced manual reset input | Internal 20kΩ pullup eliminates need for external RC network in pushbutton interfaces |
| VCC-to-battery switchover | 40mV hysteresis prevents oscillation during slow VCC decay; automatic transition within 20µs |
| Low 10µA quiescent current | Enables >10-year coin-cell backup life in standby mode (VBATT = 2.8V) |
| RESET/RESET valid down to 1.2V | Ensures deterministic reset behavior even as primary supply collapses to near-threshold levels |
Applications
| Portable POS Terminals | Industrial Programmable Logic Controllers |
|---|---|
|
Use Scenario: Battery-backed memory retention during AC power interruption or hot-swap battery replacement. IC Role / Device Role / Timing Role: Supervisory controller providing VCC brownout detection, automatic BATT switchover, and CE gating to preserve SRAM contents. Use Value: Prevents transaction data loss and system crash by maintaining RAM power and disabling write access during supply instability. |
Use Scenario: Reliable µP reset and memory protection in harsh factory-floor environments with noisy 24V DC supplies. IC Role / Device Role / Timing Role: Precision reset generator with 2.32V threshold and 150ms timeout, ensuring deterministic boot after voltage sags. Use Value: Eliminates spurious resets from transient noise while guaranteeing reset assertion during sustained undervoltage events. |
| Medical Patient Monitors | Smart Energy Meters |
|
Use Scenario: Maintaining real-time clock and configuration memory during brief mains dropout or battery depletion. IC Role / Device Role / Timing Role: Dual-supply supervisor with battery switchover and CE gating, powering RTC and preserving calibration data. Use Value: Ensures continuous timekeeping and regulatory-compliant data logging without external supervision circuitry. |
Use Scenario: Tamper-resistant firmware storage and metering register backup during utility grid fluctuations. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor with 10µA IBACK and 3µA IBATT, extending lithium-thionyl chloride battery life. Use Value: Supports 15+ year field deployment with zero maintenance while guaranteeing secure nonvolatile memory integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365PKA23+T | Same 2.32V reset threshold and SOT23-8 package, but features push-pull active-low RESET output instead of open-drain active-high | Suitable for systems requiring active-low reset signaling and no external pullup resistor | Select when interfacing with legacy µPs that expect active-low reset assertion and lack internal pullups |
| MAX6365LKA23+T | Identical functionality and electrical specs, but uses leaded (Pb-containing) packaging instead of lead-free (+T suffix) | Required for RoHS-exempt industrial or automotive programs mandating Pb-based solder compatibility | Choose for legacy manufacturing lines using SnPb reflow profiles or where lead-free compliance is not required |
Compared with MAX6365HKA23+T, the PKA23 variant offers different reset polarity and drive architecture for direct µP compatibility, while the LKA23 variant provides identical performance in leaded packaging - both require layout review for RESET termination and thermal pad handling, unlike the +T version's Pb-free reflow profile.
Availability
MAX6365HKA23+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6365HKA23+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 demanding industrial, medical, and communications applications.
The MAX6365 family delivers ultra-low-power supervisory functions with integrated battery switchover and chip-enable gating - engineered specifically for space- and power-constrained µP systems needing robust power-fail response and data integrity assurance.
FAQ
What is the reset output type of MAX6365HKA23+T?
The MAX6365HKA23+T features an open-drain active-high RESET output (pin 1). This means it pulls the output high only when actively driven, requiring an external pullup resistor to define the logic-high level. It asserts high during VCC undervoltage, MR low, or brownout conditions, and remains asserted for ≥150ms after VCC recovers above 2.32V. The MAX6365HKA23+T does not provide internal pullup on RESET.
Does MAX6365HKA23+T support battery-backup operation with coin-cell batteries?
Yes, MAX6365HKA23+T supports coin-cell backup via the BATT pin (pin 7), accepting voltages from 2.0V to 5.5V. In battery-backup mode, it draws only 3µA (max) from the backup source at -40°C to +85°C, enabling multi-year operation on standard CR2032 cells. The device automatically switches OUT from VCC to BATT when VCC falls 20mV below VBATT, with 40mV hysteresis to prevent chatter.
How does the chip-enable gating function work in MAX6365HKA23+T?
In MAX6365HKA23+T, CE IN (pin 2) connects to CE OUT (pin 8) through a low-on-resistance transmission gate during normal operation. When reset asserts, CE OUT is immediately disabled - if CE IN is low at reset assertion, CE OUT stays low for 12µs to complete ongoing memory access; if CE IN is high, CE OUT goes high without delay. This prevents corrupted writes to SRAM during power faults.
What is the minimum VCC voltage required for MAX6365HKA23+T to operate correctly?
MAX6365HKA23+T operates down to 1.2V on VCC (pin 5), with guaranteed RESET/RESET functionality and valid threshold detection at this level. Its 10µA quiescent current and 2.32V reset threshold allow reliable operation across wide input ranges - including single-cell Li-ion (3.0–4.2V), 3.3V logic rails, and 2.5V/1.8V domains - while maintaining full supervisory functionality including CE gating and battery switchover.
Can MAX6365HKA23+T be used without a backup battery?
Yes, MAX6365HKA23+T functions fully without a backup battery: connect BATT (pin 7) to GND and tie OUT (pin 6) directly to VCC (pin 5). All supervisory functions - VCC monitoring, manual reset, and CE gating - remain active. The device will assert RESET during VCC brownout or power-down, but battery switchover and backup power delivery are disabled. No modifications to reset timeout or threshold behavior are needed.
MAX6365HKA23+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:
- 2.32V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6365HKA23+T FAQ
1.How can I place an order for MAX6365HKA23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365HKA23+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 MAX6365HKA23+T reliable?
The price and inventory of MAX6365HKA23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365HKA23+T is usually 5 days.
3.What payment methods are accepted for MAX6365HKA23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365HKA23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365HKA23+T?
MAX6365HKA23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365HKA23+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 MAX6365HKA23+T?
For technical support, including MAX6365HKA23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365HKA23+T requirements.
6.How does Aetrix verify that MAX6365HKA23+T is sourced from the original manufacturer or authorized distributors?
All MAX6365HKA23+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 MAX6365HKA23+T meets industry standards.
7.What is the process for return or replacement of MAX6365HKA23+T?
All MAX6365HKA23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365HKA23+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 MAX6365HKA23+T part is unused and in its original packaging.
Return procedure for MAX6365HKA23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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