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Analog Devices Inc./Maxim Integrated MAX6365PKA29+T
- Part No.:
- MAX6365PKA29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365PKA29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,876
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Product details
Overview
MAX6365PKA29+T from Maxim Integrated is a low-power microprocessor supervisory circuit with manual reset input, battery-backup switchover, and chip-enable gating. It monitors VCC supply voltage (reset threshold = 2.93V typ), asserts active-low open-drain RESET during power-up/down/brownout, switches OUT between VCC and backup battery (VBATT), and gates CE signals with 1.5ns propagation delay. Used in portable POS terminals and industrial controllers requiring reliable memory write protection.
For engineers reviewing the MAX6365PKA29+T datasheet, MAX6365PKA29+T pinout, MAX6365PKA29+T application, or MAX6365PKA29+T equivalent, key selection criteria include its 2.93V factory-trimmed reset threshold, 10µA quiescent current, 8-pin SOT23 package, and integrated manual reset debouncing - critical for battery-powered µP systems with CMOS RAM retention requirements.
Technical Context
The MAX6365PKA29+T implements a precision voltage monitor with ±1.5% threshold accuracy over temperature, coupled to a reset generator with guaranteed 150ms minimum timeout. Its internal transmission gate enables CE IN-to-CE OUT signal pass-through only when reset is deasserted, providing hardware-level write protection for SRAM during supply faults.
Battery switchover is controlled by dual conditions: VCC must fall below 2.93V *and* be at least 20mV below VBATT to engage backup mode; hysteresis prevents oscillation during slow VCC decay. The MR input features an internal 20kΩ pullup and 1µs minimum pulse width immunity, eliminating external debounce components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ), factory-trimmed - ensures precise detection of +3.3V supply brownout without external resistor network |
| Quiescent Current | 10µA (max) at VCC = 5.5V - enables multi-year operation on coin-cell backup batteries |
| Reset Timeout | 150ms (min) - guarantees µP initialization completes before release from reset state |
| Supply Range | 1.2V to 5.5V - supports direct interface with 1.8V/2.5V/3.3V/5V logic domains and battery-backed operation |
| CE Propagation Delay | 1.5ns - allows use with high-speed µPs and DSPs without timing violation in memory access paths |
| MR Input Pullup | 20kΩ internal - eliminates need for external resistor when using momentary switch to GND |
| Output Type | Open-drain active-low RESET - provides flexible level-shifting and wired-OR reset bus capability |
Pinout & Package
MAX6365PKA29+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained portable designs. Pin numbering follows standard SOT23 top-view orientation with pin 1 marked by dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output - sinks up to 1.6mA; requires external pullup for logic-high state |
| 2 | CE IN | Chip-enable input - connected to µP's CE or /CS line; gated to CE OUT only when reset is inactive |
| 3 | GND | Ground reference - must be low-impedance connection to system ground plane |
| 4 | MR | Manual reset input - logic low asserts reset; internal 20kΩ pullup to VCC enables switch-to-GND interface |
| 5 | VCC | Main supply input - powers device and sources OUT during normal operation (1.2V–5.5V range) |
| 6 | OUT | Switched output - delivers power to SRAM from VCC or VBATT depending on supply status |
| 7 | BATT | Backup battery input - supplies OUT when VCC < 2.93V and VCC < VBATT − 20mV |
| 8 | CE OUT | Chip-enable output - passes CE IN signal only when reset is deasserted; actively pulled to OUT when disabled |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V ±1.5% over -40°C to +85°C - eliminates calibration overhead and external resistor tolerance dependency |
| Integrated CE gating | 1.5ns propagation delay with 20Ω on-resistance - prevents spurious writes to SRAM during power transitions without added logic |
| Debounced manual reset | Internal 20kΩ pullup and 1µs glitch immunity - supports direct connection of mechanical switch without RC filter |
| Battery switchover hysteresis | 40mV (20mV up + 20mV down) - avoids oscillation during slow VCC ramp-down in brownout conditions |
| Low-voltage operation | Functional down to 1.2V VCC or VBATT - enables compatibility with emerging ultra-low-power microcontrollers |
Applications
| Portable POS Terminals | Industrial Data Loggers |
|---|---|
|
Use Scenario: Battery-backed transaction logging during AC power loss in retail environments. IC Role / Device Role / Timing Role: Supervisory controller that maintains SRAM integrity, asserts reset on main supply collapse, and switches memory power source to coin cell. Use Value: Guarantees zero data loss during 100ms–500ms utility outages via 150ms reset hold and sub-10µA backup current draw. |
Use Scenario: Long-term environmental sensor data capture in remote industrial sites with intermittent solar charging. IC Role / Device Role / Timing Role: Power-fail detector and memory protector that gates CE signals during brownout and enables clean µP restart upon recovery. Use Value: Prevents corrupted flash writes by disabling memory access within 1.5ns of reset assertion, synchronized to supply monitoring. |
| Medical Handheld Devices | Smart Metering Modules |
|
Use Scenario: Emergency patient parameter storage during battery swap in portable diagnostic tools. IC Role / Device Role / Timing Role: Manual reset initiator and battery switchover manager triggered by user button press while maintaining RAM contents. Use Value: Enables safe hot-swap of primary battery using MR input, with no software intervention required and guaranteed 150ms reset hold. |
Use Scenario: Tamper-resistant energy consumption recording in utility meters with backup power fallback. IC Role / Device Role / Timing Role: Voltage supervisor that detects grid voltage sag and activates backup power path while asserting reset to halt metering firmware. Use Value: Meets IEC 62053-21 accuracy requirements by preventing register corruption during 200ms voltage dips below 80% nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365LKA29+T | Same functionality and 2.93V threshold, but leaded (Pb-containing) SOT23 package | Not suitable for RoHS-compliant production; identical electrical behavior in non-automotive contexts | Select MAX6365PKA29+T for lead-free manufacturing; choose LKA version only if legacy Pb assembly is mandated |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 1.8µA quiescent current, no manual reset or CE gating | Lacks battery switchover and memory write protection - requires external MOSFET and logic for equivalent functionality | Use only when simplified supervision suffices and backup power management is handled separately |
Compared with MAX6365PKA29+T, the LKA29 variant shares identical supervision parameters but requires Pb-based soldering processes, while TPS3808G33DBVR reduces power consumption by 44% yet omits critical battery-backup and CE gating features needed for SRAM retention in portable systems.
Availability
MAX6365PKA29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial data loggers, and medical handheld devices requiring stable component supply with long-term lifecycle support.
Supply support for MAX6365PKA29+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 demanding industrial, automotive, and communications applications.
The MAX6365–MAX6368 family was designed specifically for µP systems needing integrated power supervision, battery-switchover, and hardware memory write protection - targeting space- and power-constrained embedded applications.
FAQ
What is the exact reset threshold voltage of the MAX6365PKA29+T?
The MAX6365PKA29+T has a factory-trimmed reset threshold of 2.93V (typical), with guaranteed range of 2.85V to 3.00V across -40°C to +85°C. This value is laser-trimmed during production and does not require external resistor calibration. The "29" suffix in MAX6365PKA29+T explicitly denotes this 2.93V threshold variant, confirmed in Maxim's Reset Threshold Ranges table.
Does the MAX6365PKA29+T support battery-backup operation with lithium coin cells?
Yes, the MAX6365PKA29+T supports battery-backup operation with standard 3V lithium coin cells (e.g., CR2032). When VCC drops below 2.93V and falls at least 20mV below VBATT, the device automatically switches OUT from VCC to the battery. Quiescent current in backup mode is just 3µA (typ), enabling multi-year operation on typical coin cells without significant capacity drain.
How does the manual reset (MR) input function on the MAX6365PKA29+T?
The MR input on MAX6365PKA29+T is a debounced, internally pulled-up (20kΩ to VCC) signal. Holding MR low asserts active-low RESET continuously; RESET remains asserted for ≥150ms after MR returns high. No external components are needed - a momentary switch from MR to GND suffices. Glitch immunity is 1µs, making it robust against contact bounce and EMI.
Can the MAX6365PKA29+T be used without a backup battery?
Yes, the MAX6365PKA29+T operates fully without a backup battery. In this configuration, connect BATT to GND and tie OUT directly to VCC. All supervision functions - reset generation, MR input handling, and CE gating - remain fully operational. The device draws only 10µA quiescent current, making it suitable for always-on monitoring even in non-battery-backed systems.
What is the purpose of the CE IN and CE OUT pins on the MAX6365PKA29+T?
The CE IN and CE OUT pins implement hardware-level memory write protection on the MAX6365PKA29+T. CE IN connects to the µP's chip-enable signal; CE OUT drives the SRAM's /CE input. During normal operation, CE IN passes through to CE OUT with 1.5ns delay. When reset asserts, CE OUT is immediately disabled - preventing spurious writes to volatile memory during power faults or reset sequences.
MAX6365PKA29+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 Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6365PKA29+T FAQ
1.How can I place an order for MAX6365PKA29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365PKA29+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 MAX6365PKA29+T reliable?
The price and inventory of MAX6365PKA29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365PKA29+T is usually 5 days.
3.What payment methods are accepted for MAX6365PKA29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365PKA29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365PKA29+T?
MAX6365PKA29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365PKA29+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 MAX6365PKA29+T?
For technical support, including MAX6365PKA29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365PKA29+T requirements.
6.How does Aetrix verify that MAX6365PKA29+T is sourced from the original manufacturer or authorized distributors?
All MAX6365PKA29+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 MAX6365PKA29+T meets industry standards.
7.What is the process for return or replacement of MAX6365PKA29+T?
All MAX6365PKA29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365PKA29+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 MAX6365PKA29+T part is unused and in its original packaging.
Return procedure for MAX6365PKA29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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