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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 MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,170
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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 factory-preset 2.93V reset threshold. It provides active-low open-drain RESET output, monitors VCC down to 1.2V, switches RAM power between VCC and backup battery, and gates CE signals with 1.5ns propagation delay - used in portable POS terminals and industrial controllers requiring reliable brownout recovery.
For engineers reviewing the MAX6365HKA29+T datasheet, MAX6365HKA29+T pinout, MAX6365HKA29+T application, or MAX6365HKA29+T equivalent, key selection criteria include its 2.93V reset threshold tolerance (±7mV), 150ms minimum reset timeout, 10µA quiescent current, and SOT23-8 package compatibility with space-constrained µP systems.
Technical Context
The MAX6365HKA29+T integrates four core functions: precision VCC monitoring with ±0.7% threshold accuracy at 2.93V, automatic VCC-to-battery switchover when VCC falls below VBATT by >20mV, debounced manual reset input (MR) with internal 20kΩ pullup, and chip-enable signal gating that disables CE OUT during reset to prevent SRAM corruption.
Its reset generator guarantees valid RESET assertion down to 1.2V supply, supports battery-backup mode with <3µA IBACK at -40°C to +85°C, and features transient-immune design validated for negative-going VCC glitches up to 30µs at 100mV overdrive - critical for noisy industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (factory preset, ±7mV min/max), ensures reliable detection of 3.0V system brownout |
| Reset Timeout Period | 150ms min, guarantees µP initialization completes before release from reset |
| Supply Current | 15µA typ at VCC = 5.5V, enables multi-year battery life in backup mode |
| VCC Operating Range | 1.2V to 5.5V, supports direct interface with 1.2V logic and legacy 5V supplies |
| Output Type | Open-drain active-low RESET, allows wired-OR configuration with other supervisors |
| Battery Switchover Hysteresis | 40mV (20mV rise/fall), prevents oscillation during slow VCC decay near threshold |
| CE Propagation Delay | 1.5ns typ, preserves timing integrity for high-speed µP address/data bus gating |
Pinout & Package
MAX6365HKA29+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for PCB area-constrained applications. Pin assignments are verified per Maxim's official pin configuration diagram (Rev 5, 10/11).
| 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-level compatibility |
| 2 CE IN | Chip-enable input | Directly connected to µP CE line; gating disabled during reset to block erroneous memory writes |
| 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 | Logic-low assertion triggers reset; internal 20kΩ pullup eliminates need for external resistor |
| 5 VCC | Main supply input | Powers device and sources OUT during normal operation; monitored for reset generation |
| 6 OUT | Power output for SRAM/RTC | Switches between VCC and BATT automatically; delivers up to 150mA from VCC, 20mA from battery |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V battery; activates when VCC drops below VTH and VBATT exceeds VCC by >20mV |
| 8 CE OUT | Chip-enable output | Passes CE IN signal during normal operation; held low for 12µs after reset assertion to complete memory access |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±7mV tolerance across -40°C to +85°C, eliminating external resistor calibration |
| Integrated CE gating | 1.5ns propagation delay and <100Ω on-resistance enable direct connection to 33MHz µP buses without timing violation |
| Ultra-low backup current | 3µA max IBACK at -40°C, extending coin-cell life to >10 years in always-on RTC applications |
| Reset validity at low voltage | RESET guaranteed functional down to 1.2V VCC or VBATT, supporting deep-sleep SoC architectures |
| Transient-immune reset detection | Withstands 30µs negative VCC transients at 100mV overdrive, reducing false resets in motor-driven environments |
Applications
| Portable POS Terminals | Industrial PLC Controllers |
|---|---|
|
Use Scenario: Battery-backed memory retention during AC power loss in handheld payment devices. IC Role / Device Role / Timing Role: Supervisory IC providing VCC brownout detection, automatic BATT switchover to SRAM, and CE gating to prevent write corruption during power transition. Use Value: Guarantees 150ms reset hold time and <3µA backup current, enabling >5-year coin-cell lifetime without data loss. |
Use Scenario: Reliable µP restart and RAM protection in factory-floor programmable logic controllers exposed to EMI. IC Role / Device Role / Timing Role: Reset generator with 2.93V threshold and 40mV hysteresis, plus CE signal blocking during brownout to preserve ladder logic state. Use Value: Immunity to 30µs VCC transients prevents spurious resets in electrically noisy plant environments. |
| Set-Top Box Power Management | Medical Infusion Pump Memory |
|
Use Scenario: Maintaining real-time clock and channel settings during brief grid interruptions in consumer STBs. IC Role / Device Role / Timing Role: Dual-supply supervisor managing VCC-to-BATT handoff and asserting RESET to freeze µP execution until stable power returns. Use Value: 1.2V operating capability ensures reset remains active even as Li-ion battery discharges to endpoint voltage. |
Use Scenario: Preserving dosage history and calibration data during main power failure in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical supervisory circuit with guaranteed 150ms reset timeout and CE gating to lock memory writes during fault conditions. Use Value: Factory-trimmed 2.93V threshold matches 3.0V rail tolerance, eliminating field calibration and ensuring IEC 62304 compliance. |
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 2.93V threshold and SOT23-8 package, but push-pull active-low RESET output instead of open-drain | Requires no external pullup; unsuitable for wired-OR reset bus configurations | Select when driving single-load RESET inputs directly and board layout prohibits pullup resistors |
| TPS3808G33DBVR | 3.3V fixed threshold, 350ms reset timeout, 2.5µA IQ, SOT23-6 package - lacks battery switchover and CE gating | Only provides basic reset supervision; cannot replace MAX6365HKA29+T in battery-backed SRAM systems | Choose only for cost-sensitive non-backup applications where CE gating and BATT support are unnecessary |
Compared with MAX6365HKA29+T, MAX6365PKA29+T offers simplified drive but sacrifices bus-sharing flexibility, while TPS3808G33DBVR reduces cost and current draw but omits critical battery-backup and memory-protection functions required in portable/embedded designs.
Availability
MAX6365HKA29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLC controllers, set-top box power management, and medical infusion pump memory requiring stable component supply across extended product lifecycles.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and communications markets.
The MAX6365–MAX6368 family was designed specifically for µP systems needing integrated power monitoring, battery backup, and memory write protection - targeting space-constrained, battery-operated, and reliability-critical embedded applications.
FAQ
What is the exact reset threshold voltage of the MAX6365HKA29+T?
The MAX6365HKA29+T has a factory-preset reset threshold of 2.93V, with a guaranteed range of 2.85V (min) to 3.00V (max) across -40°C to +85°C. This value is laser-trimmed during production and does not require external components. The "29" suffix in MAX6365HKA29+T explicitly denotes this 2.93V threshold variant, confirmed in Maxim's Reset Threshold Ranges table and Device Marking Codes.
Does the MAX6365HKA29+T support battery-backup operation, and what are the voltage requirements?
Yes, the MAX6365HKA29+T fully supports battery-backup operation. It switches OUT from VCC to BATT when VCC falls below both the 2.93V reset threshold and VBATT by at least 20mV. VBATT must be ≥2.0V and ≤5.5V; typical coin-cell or lithium backup sources (e.g., 3.0V CR2032) are compatible. In backup mode, the device draws only 3µA (max) from the battery, enabling multi-year retention.
What type of RESET output does the MAX6365HKA29+T provide, and how is it configured?
The MAX6365HKA29+T provides an open-drain active-low RESET output (pin 1). It requires an external pullup resistor to VCC or another logic rail to establish a defined high state when deasserted. This configuration enables wired-OR connection with other reset sources on shared reset buses - a key distinction from push-pull variants like MAX6365PKA29+T. The "H" in the part number denotes the open-drain active-high option, but MAX6365HKA29+T uses active-low RESET per its pin description and selector guide.
How does the chip-enable (CE) gating function work in the MAX6365HKA29+T?
The MAX6365HKA29+T gates the CE signal via pins 2 (CE IN) and 8 (CE OUT) 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 immediately disabled - if CE IN is low at reset onset, CE OUT stays low for 12µs to complete ongoing memory access; otherwise, it floats high. This behavior is hardware-enforced and requires no firmware intervention.
Can the MAX6365HKA29+T operate with a 1.2V supply, and what functions remain active?
Yes, the MAX6365HKA29+T operates down to 1.2V on VCC or VBATT, and all core functions remain active: RESET output is guaranteed valid, reset timeout period holds at ≥150ms, and battery switchover logic functions correctly. The 10µA typical supply current and <3µA backup current are specified at 1.2V, making it suitable for ultra-low-voltage SoC subsystems and energy-harvesting applications where traditional supervisors fail.
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:
- Active
- 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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