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Analog Devices Inc./Maxim Integrated MAX6365HKA29-T
- Part No.:
- MAX6365HKA29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365HKA29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
MAX6365HKA29-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 2.85V–3.00V), provides active-low open-drain RESET output, switches OUT between VCC and backup battery (VBATT) during brownout, and gates CE signals with 1.5ns propagation delay. It is used in portable equipment requiring reliable power-fail detection and SRAM data retention.
For engineers reviewing the MAX6365HKA29-T datasheet, MAX6365HKA29-T pinout, MAX6365HKA29-T application, or MAX6365HKA29-T equivalent, key selection criteria include its 2.93V typical reset threshold, 150ms minimum reset timeout, 10µA quiescent current, 8-pin SOT23 package, and integrated VCC-to-BATT switchover with 40mV hysteresis.
Technical Context
The MAX6365HKA29-T implements a precision voltage monitor with factory-trimmed 2.93V reset threshold (±7mV over temperature), coupled to an internal power-switching MOSFET that connects either VCC or VBATT to OUT based on real-time comparison of VCC vs. VBATT and VCC vs. VTH. Its manual reset input (MR) features internal 20kΩ pullup and 1µs minimum pulse width immunity.
Chip-enable gating uses a transmission gate architecture with CE IN → CE OUT path enabled only when RESET is deasserted; CE OUT is actively pulled up to OUT during reset assertion, and holds low for 12µs after CE IN goes low during reset. The device guarantees RESET/RESET operation down to 1.2V VCC or VBATT supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V to 3.00V (typ 2.93V); ensures reliable reset assertion before 3.3V system brownout. |
| Reset Timeout Period | 150ms min; guarantees µP initialization completes before release from reset. |
| Supply Current | 10µA typ at VCC = 5.5V; enables ultra-low-power operation in battery-backed systems. |
| VCC Operating Range | 1.2V to 5.5V; supports single-cell Li-ion, coin-cell, and multi-rail logic supplies. |
| Battery Switchover Hysteresis | 40mV; prevents oscillation during slow VCC fall/rise near VBATT crossover. |
| CE Propagation Delay | 1.5ns typ; preserves timing integrity for high-speed µP address/data bus gating. |
| MR Input Pullup | 20kΩ internal; eliminates external resistor for momentary switch interface. |
Pinout & Package
MAX6365HKA29-T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead(Pb)-free compatible ('-T' suffix denotes tape-and-reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC < VTH, MR low, or fault; requires external pullup for logic-level compatibility. |
| 2 CE IN | Chip-enable input | Controls gating path to CE OUT; connect to GND or OUT if unused. |
| 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 20kΩ pullup to VCC enables switch-only interface. |
| 5 VCC | Main supply input | Powers internal circuitry and sources OUT during normal operation (up to 150mA). |
| 6 OUT | Switched output | Connects to VCC or VBATT depending on supply status; powers SRAM or RTC in backup mode. |
| 7 BATT | Backup battery input | Supplies OUT when VCC < VTH and VCC < VBATT − 20mV; draws <1µA standby current. |
| 8 CE OUT | Chip-enable output | Gated version of CE IN; held low for 12µs after CE IN low during reset to complete memory access. |
Key Features
| Feature | Design Value |
|---|---|
| Debounced Manual Reset Input | MR accepts direct switch connection with no external RC; 1µs glitch immunity prevents false triggers. |
| On-board Chip-Enable Gating | 1.5ns propagation delay and 20–100Ω on-resistance enable safe, high-speed SRAM write protection. |
| VCC-to-BATT Switchover | Automatic transition with 40mV hysteresis ensures stable RAM power during brownout without external FET. |
| Low 10µA Quiescent Current | Extends battery life in always-on backup applications; validated down to 1.2V VCC or VBATT. |
| Reset Output Validity | RESET remains functional and guaranteed logic level even when VCC or VBATT drops to 1.2V. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter retaining real-time sensor logs during main supply interruption. IC Role / Device Role / Timing Role: Supervisory controller providing VCC brownout detection, automatic BATT switchover to SRAM, and CE gating to prevent corrupted memory writes. Use Value: Guarantees 150ms reset hold time and <1µA backup current, enabling >1-year coin-cell lifetime with persistent data retention. |
Use Scenario: DIN-rail mounted PLC module operating in harsh factory environments with unstable 24VDC supply. IC Role / Device Role / Timing Role: Power supervisor asserting reset on 24V rail sag, enabling controlled µP reboot and preventing firmware corruption during undervoltage events. Use Value: 2.93V reset threshold matches 3.3V logic rail tolerance; 40mV switchover hysteresis rejects supply ripple-induced false switching. |
| Point-of-Sale Terminals | Set-Top Box Firmware Recovery |
|
Use Scenario: Retail terminal using flash memory and SRAM for transaction buffering during AC power loss. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 5V rail for reset, gates CE to SRAM during brownout, and maintains clock/calendar via BATT-backed RTC. Use Value: Integrated CE gating eliminates need for discrete logic; 10µA ICC extends backup runtime beyond 72 hours on CR2032. |
Use Scenario: Consumer STB performing secure firmware update where power interruption must not brick the device. IC Role / Device Role / Timing Role: System watchdog enabler (via MR tie to µP GPIO) and reset coordinator ensuring bootloader executes only after full VCC stabilization. Use Value: MR input with 20kΩ pullup simplifies GPIO interface; 150ms tRP ensures bootloader clock domain is fully settled before code execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365PKA29-T | Same reset threshold (2.93V), but push-pull active-low RESET output instead of open-drain active-high. | Requires no external pullup; better suited for systems needing direct drive of µP reset pin without level-shifting. | Select when µP reset pin is active-low and board layout lacks space for pullup resistor. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 350ms timeout, 2.5µA IQ, SOT23-6 package (no CE gating or battery switchover). | Lacks battery backup, CE gating, and MR input; suitable only for basic power monitoring without data retention. | Choose only for cost-sensitive, non-backup applications where 3.3V rail supervision suffices. |
Compared with MAX6365HKA29-T, MAX6365PKA29-T offers identical supervision accuracy and timing but different reset polarity and drive strength, while TPS3808G33DBVR reduces functionality to basic reset generation-omitting battery switchover, CE gating, and manual reset entirely.
Availability
MAX6365HKA29-T is available at Aetrix Electronics and suitable for portable medical devices, industrial control modules, point-of-sale terminals, and set-top box firmware recovery systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6365HKA29-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 and consumer applications.
The MAX6365–MAX6368 family delivers integrated power supervision, battery backup, and memory protection for µP-based systems where reliability, small size, and ultra-low power are critical.
FAQ
What is the exact reset threshold voltage for MAX6365HKA29-T?
The MAX6365HKA29-T has a factory-trimmed reset threshold range of 2.85V to 3.00V, with a typical value of 2.93V at +25°C. This specification is guaranteed across the full -40°C to +85°C operating temperature range, and the device maintains ±7mV accuracy over temperature per the Electrical Characteristics table.
Does MAX6365HKA29-T support battery backup for SRAM, and how does it switch?
Yes, MAX6365HKA29-T supports battery backup for SRAM via its integrated VCC-to-BATT switchover function. When VCC falls below the reset threshold (2.93V) and also drops 20mV below VBATT, the internal MOSFET connects BATT to OUT. A 40mV hysteresis prevents oscillation during slow transitions, and OUT can source up to 150mA from VCC or 20mA from BATT.
What is the function of the MR pin on MAX6365HKA29-T, and does it require external components?
The MR (Manual Reset) pin on MAX6365HKA29-T is a debounced active-low input that asserts reset when pulled low. It includes an internal 20kΩ pullup resistor to VCC, so no external pullup is needed. A normally open momentary switch from MR to GND is sufficient; external RC debounce is unnecessary due to built-in 1µs glitch immunity.
Can MAX6365HKA29-T be used without a backup battery?
Yes, MAX6365HKA29-T operates without a backup battery. In this configuration, connect BATT to GND and OUT directly to VCC. The device still provides full reset supervision, manual reset, and CE gating functionality - only the battery switchover feature is disabled, and the 10µA quiescent current remains unchanged.
What package type and dimensions does MAX6365HKA29-T use?
MAX6365HKA29-T uses an 8-pin SOT23 package measuring 2.9mm × 1.6mm × 1.1mm. It is surface-mount compatible, RoHS-compliant, and supplied in tape-and-reel format ('-T' suffix). The pinout matches standard SOT23 footprints, and thermal performance supports continuous operation at +85°C ambient with 700mW max power dissipation.
MAX6365HKA29-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:
- 2.93V
- 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
MAX6365HKA29-T FAQ
1.How can I place an order for MAX6365HKA29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365HKA29-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 MAX6365HKA29-T reliable?
The price and inventory of MAX6365HKA29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365HKA29-T is usually 5 days.
3.What payment methods are accepted for MAX6365HKA29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365HKA29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365HKA29-T?
MAX6365HKA29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365HKA29-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 MAX6365HKA29-T?
For technical support, including MAX6365HKA29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365HKA29-T requirements.
6.How does Aetrix verify that MAX6365HKA29-T is sourced from the original manufacturer or authorized distributors?
All MAX6365HKA29-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 MAX6365HKA29-T meets industry standards.
7.What is the process for return or replacement of MAX6365HKA29-T?
All MAX6365HKA29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365HKA29-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 MAX6365HKA29-T part is unused and in its original packaging.
Return procedure for MAX6365HKA29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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