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Analog Devices Inc./Maxim Integrated MAX6365PKA26-T
- Part No.:
- MAX6365PKA26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365PKA26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,073
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Product details
Overview
MAX6365PKA26-T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery backup, chip-enable gating, and debounced manual reset input. It monitors VCC supply voltage (reset threshold = 2.63 V), provides active-low open-drain RESET output, switches CMOS RAM power between VCC and backup battery, and guarantees RESET/RESET operation down to 1.2 V. It is used in portable equipment requiring reliable power-fail detection and data retention during brownout.
For engineers reviewing the MAX6365PKA26-T datasheet, MAX6365PKA26-T pinout, MAX6365PKA26-T application, or MAX6365PKA26-T equivalent, key selection criteria include its 2.63 V factory-preset reset threshold, 150 ms minimum reset timeout, 10 µA quiescent current, 8-pin SOT23 package, and integrated CE signal gating for SRAM write protection.
Technical Context
The MAX6365PKA26-T implements a precision voltage monitor with ±1.5% threshold accuracy over temperature, coupled to an internal power-switching MOSFET that connects VCC or BATT to OUT based on VCC–VBATT differential (±20 mV switchover hysteresis). Its manual reset input (MR) features a 20 kΩ internal pullup and 120 ns MR-to-RESET delay at VCC = 3.3 V.
Chip-enable gating uses a transmission gate with 1.5 ns propagation delay (typ), 20–100 Ω on-resistance, and 12 µs reset-to-CE OUT hold time. The device operates across –40°C to +85°C with guaranteed functionality down to 1.2 V on either VCC or VBATT, supporting battery-backed SRAM retention in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (factory preset, ±1.5% accuracy over –40°C to +85°C) |
| Reset Timeout Period | 150 ms min - ensures µP completes full reset sequence before release |
| Supply Current | 10 µA typ at VCC = 5.5 V - enables multi-year battery life in backup mode |
| VCC Operating Range | 1.2 V to 5.5 V - supports single-cell Li-ion, coin-cell, and logic-supply rails |
| Output Type | Open-drain active-low RESET - compatible with multiple µP reset inputs and wired-OR configurations |
| Battery Switchover | VCC–VBATT ≥ 20 mV hysteresis - prevents oscillation during slow VCC decay |
| CE Propagation Delay | 1.5 ns typ - preserves timing integrity for high-speed µP address/data buses |
Pinout & Package
MAX6365PKA26-T is housed in an 8-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm), surface-mount, lead(Pb)-free compatible (–T suffix), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low continuously when VCC < 2.63 V or MR is low; holds low for ≥150 ms after recovery |
| 2 CE IN | Chip-enable input | Drives CE OUT pass gate; tied to GND or OUT if unused; 1 µA leakage max |
| 3 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance connection |
| 4 MR | Manual reset input | Logic-low assertion triggers reset; internal 20 kΩ pullup to VCC; debounced internally |
| 5 VCC | Main supply input | 1.2 V–5.5 V operating range; powers internal circuitry and sources OUT up to 150 mA |
| 6 OUT | Power output for SRAM/µP peripherals | Switches between VCC and BATT; delivers regulated output with ≤4.6 Ω on-resistance at 2.38 V |
| 7 BATT | Backup battery input | Accepts 2.0 V–5.5 V; supplies OUT in brownout; draws ≤3 µA standby current when VCC = 0 V |
| 8 CE OUT | Chip-enable output | Gated version of CE IN; disabled during reset to prevent erroneous SRAM writes; 12 µs hold time |
Key Features
| Feature | Design Value |
|---|---|
| Factory-preset 2.63 V reset threshold | Eliminates external resistor divider; reduces BOM count and layout area in space-constrained portable designs |
| On-board CE signal gating (1.5 ns delay) | Prevents corruption of CMOS RAM during power transitions without requiring external logic or timing margin |
| Debounced MR input with 20 kΩ pullup | Enables direct connection to momentary switch (MR–GND); removes need for external RC debounce network |
| 10 µA supply current (no load) | Extends battery life in always-on backup mode; supports >10-year shelf life with typical coin-cell batteries |
| VCC/BATT switchover with 40 mV hysteresis | Ensures clean, bounce-free power source transition during brownout-critical for nonvolatile memory retention |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
|
Use Scenario: Battery-powered ECG monitor retains real-time waveform buffer during AC power loss. IC Role / Device Role / Timing Role: Supervises main 3.3 V rail, asserts RESET to halt µP, gates CE to freeze SRAM writes, and switches SRAM power to coin cell. Use Value: Guarantees zero data loss during 100 ms–2 s brownouts; 10 µA backup current enables >5-year battery life. |
Use Scenario: Remote environmental sensor node logs temperature/humidity hourly; must preserve last 72 hours of data. IC Role / Device Role / Timing Role: Monitors 2.8 V Li-ion supply; triggers controlled µP shutdown and enables battery-backed SRAM retention upon undervoltage. Use Value: 2.63 V threshold matches Li-ion discharge curve; 150 ms reset timeout ensures safe EEPROM save before power collapse. |
| Point-of-Sale Terminals | Smart Meters |
|
Use Scenario: Credit card terminal maintains transaction queue and encryption keys during brief grid flicker. IC Role / Device Role / Timing Role: Provides glitch-immune reset supervision and CE gating to lock SRAM during VCC dip below 2.63 V. Use Value: 100 ns glitch immunity prevents spurious resets; 1.5 ns CE delay preserves bus timing integrity with ARM Cortex-M4. |
Use Scenario: Electricity meter retains billing cycle data and tamper logs during utility outage. IC Role / Device Role / Timing Role: Switches RTC and FRAM power from mains to supercapacitor/battery; asserts RESET to suspend计量 firmware. Use Value: BATT-to-OUT on-resistance ≤4.6 Ω at 2.38 V minimizes voltage drop under 25 mA load-preserving FRAM write margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365LKA26-T | Same 2.63 V threshold and open-drain RESET, but push-pull output variant (MAX6365_L) | Requires no external pullup; unsuitable for wired-OR reset buses | Select when driving single µP reset pin without shared bus topology |
| TPS3808G125DBVR | 2.5 V reset threshold, 360 ms timeout, 2.5 µA IQ, SOT23-6 (no CE gating or battery switchover) | Lacks battery backup, chip-enable gating, and MR input-only basic reset supervision | Select only for cost-sensitive, non-backup applications where CE control and dual power path are unnecessary |
Compared with MAX6365PKA26-T, MAX6365LKA26-T offers identical monitoring and timing but different output drive architecture, while TPS3808G125DBVR sacrifices battery support and CE protection for lower quiescent current and smaller footprint-making it suitable only for simpler, non-redundant systems.
Availability
MAX6365PKA26-T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, point-of-sale terminals, and smart meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6365PKA26-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 SRAM write protection in ultra-small form factors.
FAQ
What is the factory-set reset threshold voltage for MAX6365PKA26-T?
The MAX6365PKA26-T has a factory-preset reset threshold of 2.63 V (typical), with a guaranteed range of 2.55 V to 2.70 V across –40°C to +85°C. This value is laser-trimmed during production and does not require external components. The "26" suffix in the part number directly encodes this 2.63 V threshold per Maxim's ordering convention.
Does MAX6365PKA26-T support battery backup for SRAM, and how does switchover work?
Yes, MAX6365PKA26-T supports seamless battery backup for SRAM via its integrated VCC/BATT switchover circuit. When VCC falls below the 2.63 V reset threshold *and* drops at least 20 mV below VBATT, the internal MOSFET connects BATT to OUT. Switchover hysteresis prevents oscillation during slow VCC decay. In backup mode, MAX6365PKA26-T draws only 3 µA from the battery (VBATT = 2.8 V, VCC = 0 V).
What type of RESET output does MAX6365PKA26-T provide, and what are its drive capabilities?
MAX6365PKA26-T provides an open-drain active-low RESET output. It sinks up to 1.6 mA while asserting low (VOL ≤ 0.3 V), and exhibits ≤1 µA leakage when deasserted. This configuration allows wired-OR connection with other reset sources and compatibility with diverse µP reset input architectures, including those requiring external pullups.
How does the manual reset (MR) input function on MAX6365PKA26-T?
The MR input on MAX6365PKA26-T is debounced internally and features a 20 kΩ pullup to VCC. Driving MR low asserts RESET continuously; RESET remains asserted for ≥150 ms after MR returns high. No external RC network is needed. MR accepts TTL/CMOS logic levels and can be driven directly by a momentary switch to GND-ideal for field-service reset functionality.
Can MAX6365PKA26-T be used without a backup battery?
Yes. When no backup battery is used, connect BATT to GND and tie OUT directly to VCC. The MAX6365PKA26-T continues to provide reset supervision, CE gating, and MR functionality. All internal circuits remain operational, and the device draws only 10 µA from VCC. This configuration is common in cost-sensitive applications where data retention during power loss is not required.
MAX6365PKA26-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:
- 2.63V
- 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
MAX6365PKA26-T FAQ
1.How can I place an order for MAX6365PKA26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365PKA26-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 MAX6365PKA26-T reliable?
The price and inventory of MAX6365PKA26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365PKA26-T is usually 5 days.
3.What payment methods are accepted for MAX6365PKA26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365PKA26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365PKA26-T?
MAX6365PKA26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365PKA26-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 MAX6365PKA26-T?
For technical support, including MAX6365PKA26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365PKA26-T requirements.
6.How does Aetrix verify that MAX6365PKA26-T is sourced from the original manufacturer or authorized distributors?
All MAX6365PKA26-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 MAX6365PKA26-T meets industry standards.
7.What is the process for return or replacement of MAX6365PKA26-T?
All MAX6365PKA26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365PKA26-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 MAX6365PKA26-T part is unused and in its original packaging.
Return procedure for MAX6365PKA26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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