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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:4,848
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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 monitors VCC supply voltage (reset threshold 2.25V–2.38V), provides active-low open-drain RESET output, operates down to 1.2V supply, and supports CMOS RAM backup during brownout. Used in portable POS terminals and industrial controllers requiring reliable power-fail response.
For engineers reviewing the MAX6365HKA23-T datasheet, MAX6365HKA23-T pinout, MAX6365HKA23-T application, or MAX6365HKA23-T equivalent, key selection criteria include its 2.32V factory-preset reset threshold, 150ms minimum reset timeout, 10µA quiescent current, SOT23-8 package, and integrated CE signal gating with 1.5ns propagation delay.
Technical Context
The MAX6365HKA23-T implements a precision voltage monitor with ±1.5% reset threshold accuracy over temperature, coupled with an internal transmission gate for chip-enable (CE) signal control. Its MR input features a 20kΩ internal pullup and 1µs minimum pulse width immunity.
Battery switchover logic activates when VCC falls below both the reset threshold (2.32V) and VBATT by ≥20mV, connecting BATT to OUT via a MOSFET with on-resistance as low as 4.6Ω at 2.38V VCC/25mA. RESET remains asserted for ≥150ms after VCC recovers above threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25V (min) to 2.38V (max); factory-set for +2.5V rail monitoring with guaranteed 2.32V typical value |
| Reset Timeout Period | 150ms (min); ensures µP completes full reset sequence before release |
| Supply Current | 10µA (typ) at VCC = 5.5V; enables multi-year battery life in backup mode |
| Operating Voltage Range | 1.2V to 5.5V; supports single-cell Li-ion, coin-cell, and standard logic rails |
| RESET Output Type | Open-drain active-low; allows wired-OR configuration and level-shifting with external pullup |
| CE Propagation Delay | 1.5ns (typ); preserves timing integrity for high-speed µP address/data bus gating |
| Battery Switchover Hysteresis | 40mV; prevents oscillation during slow VCC decay near threshold |
Pinout & Package
MAX6365HKA23-T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained portable designs. Pin 1 is marked with a dot; device orientation follows JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low during VCC brownout, MR low, or power-up; requires external pullup for logic-high state |
| 2 CE IN | Chip-enable input | Directly gates CE signal path; connect to GND or OUT if unused to disable gating |
| 3 GND | Ground reference | Primary return path for VCC, BATT, and internal logic; must be low-impedance |
| 4 MR | Manual reset input | Debounced logic input with 20kΩ internal pullup to VCC; asserts reset when pulled low |
| 5 VCC | Main supply input | Power source for supervision logic and VCC-to-OUT switching; monitored for reset generation |
| 6 OUT | Output power rail | Switches between VCC and BATT based on switchover logic; supplies up to 150mA to SRAM |
| 7 BATT | Backup battery input | Provides backup power when VCC < VTH and VCC < VBATT – 20mV; draws <1µA standby current |
| 8 CE OUT | Chip-enable output | Gated CE signal; goes high only when CE IN is high and RESET is not asserted |
Key Features
| Feature | Design Value |
|---|---|
| On-board CE gating | 1.5ns propagation delay enables use with 200+ MHz µPs without timing violation |
| Debounced MR input | Internal 20kΩ pullup eliminates need for external RC network or Schmitt trigger |
| Low 10µA supply current | Extends coin-cell battery life to >10 years in always-on backup applications |
| VCC transient immunity | Rejects 30µs negative transients 100mV below threshold-no false resets in noisy environments |
| Guaranteed RESET operation down to 1.2V | Ensures valid reset assertion even during deep brownout or single-cell Li-ion discharge |
Applications
| POS Terminal Power Management | Industrial PLC Memory Backup |
|---|---|
|
Use Scenario: Battery-backed SRAM retention during AC mains failure in retail point-of-sale systems. IC Role / Device Role / Timing Role: Supervisory controller that switches memory supply from VCC to BATT within 20µs of brownout detection and asserts RESET to halt µP execution. Use Value: Prevents transaction data loss by maintaining SRAM voltage above 1.8V for >24 hours on CR2032 cell while holding µP in reset. |
Use Scenario: Preserving real-time clock and configuration registers during extended power outages in factory automation controllers. IC Role / Device Role / Timing Role: Dual-role supervisor providing both reset assertion and CE gating to block write cycles during supply instability. Use Value: Eliminates need for external OR-gate and discrete MOSFET switch, reducing BOM count by 3 components and PCB area by 12mm². |
| Portable Medical Monitor | Set-Top Box Firmware Protection |
|
Use Scenario: Maintaining volatile settings and calibration data during battery swap in handheld ECG devices. IC Role / Device Role / Timing Role: Manual-reset-enabled supervisor allowing safe hot-swap of primary battery without firmware corruption. Use Value: MR input with 150ms timeout ensures µP completes shutdown sequence before backup power engages. |
Use Scenario: Preventing flash memory corruption during unexpected power loss in cable/satellite receivers. IC Role / Device Role / Timing Role: Chip-enable gate that disables memory writes within 1.5ns of RESET assertion during brownout. Use Value: Guarantees no partial page writes occur-critical for NAND flash reliability in consumer electronics. |
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 reset threshold (2.32V) and functions, but push-pull RESET output instead of open-drain | Requires no external pullup resistor; incompatible with wired-OR reset buses | Select when driving a single µP reset pin directly without bus sharing |
| TPS3808G125DBVR | Lower quiescent current (2.5µA), fixed 1.25V reset threshold, no CE gating or battery switchover | Only provides basic reset supervision-lacks memory write protection and backup power management | Select when only voltage monitoring is needed and board space permits larger SOT23-6 footprint |
Compared with MAX6365HKA23-T, MAX6365PKA23-T offers simplified drive capability but sacrifices bus flexibility, while TPS3808G125DBVR reduces power consumption at the cost of losing battery backup, CE gating, and manual reset-making it suitable only for non-critical reset-only applications.
Availability
MAX6365HKA23-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLCs, POS terminals, and set-top boxes requiring stable component supply across long production lifecycles.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and computing applications.
The MAX6365–MAX6368 family was designed specifically for µP-based systems needing integrated power supervision, battery switchover, and memory write protection in ultra-small footprints-targeting portable and battery-critical equipment.
FAQ
What is the factory-set reset threshold voltage for MAX6365HKA23-T?
The MAX6365HKA23-T has a factory-preset reset threshold of 2.25V (minimum), 2.32V (typical), and 2.38V (maximum), optimized for monitoring +2.5V power rails. This threshold is laser-trimmed during production and does not require external resistors or configuration. The '23' suffix in the part number explicitly denotes this 2.32V nominal threshold, and the value is guaranteed across -40°C to +85°C operating temperature range.
Does MAX6365HKA23-T support battery backup functionality, and how does switchover work?
Yes, MAX6365HKA23-T fully supports battery backup. When VCC drops below both the reset threshold (2.32V) and VBATT by at least 20mV, the internal MOSFET connects BATT to OUT within 20µs. The device maintains this connection until VCC rises 20mV above VBATT, providing 40mV hysteresis to prevent oscillation. In backup mode, MAX6365HKA23-T draws only 3µA from the battery (excluding load current), enabling multi-year retention on standard coin cells.
What is the function of the CE IN and CE OUT pins on MAX6365HKA23-T?
CE IN and CE OUT implement hardware-enforced memory write protection. During normal operation, CE IN passes directly to CE OUT with 1.5ns propagation delay. When RESET asserts (due to brownout, MR activation, or power-up), the CE path is disabled-preventing spurious writes to SRAM or flash. If CE IN is low when RESET asserts, CE OUT stays low for 12µs to complete ongoing memory access before disconnecting, ensuring data integrity in µP-based systems using MAX6365HKA23-T.
Can MAX6365HKA23-T operate from a 1.2V supply, and what happens to RESET output at that voltage?
Yes, MAX6365HKA23-T guarantees full functionality-including RESET assertion and deassertion-at VCC as low as 1.2V. The open-drain RESET output remains valid down to 1.2V: when asserted, it pulls low to ≤0.4V (with 1.6mA sink), and when deasserted, it presents high-impedance-requiring an external pullup. This enables compatibility with ultra-low-voltage microcontrollers and energy-harvesting systems where MAX6365HKA23-T serves as the sole supervision element.
How does the manual reset (MR) input behave on MAX6365HKA23-T, and is external debounce required?
The MR input on MAX6365HKA23-T features an internal 20kΩ pullup to VCC and is debounced internally-no external RC network or Schmitt trigger is needed. A logic-low pulse ≥1µs on MR forces RESET assertion for ≥150ms after MR returns high. This behavior allows direct connection to momentary switches (MR to GND) or TTL/CMOS outputs. In noisy environments, adding a 0.1µF capacitor from MR to GND improves immunity, but it is optional-not required for baseline operation of MAX6365HKA23-T.
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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