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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:3,719
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Product details
Overview
MAX6365PKA29-T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery backup switching, chip-enable gating, and debounced manual reset input. It operates from 1.2V to 5.5V, features a factory-preset 2.93V reset threshold (±70mV), guarantees RESET assertion down to 1.2V supply, delivers 150ms minimum reset timeout, and supports CMOS RAM protection in portable industrial controllers.
For engineers reviewing the MAX6365PKA29-T datasheet, MAX6365PKA29-T pinout, MAX6365PKA29-T application, or MAX6365PKA29-T equivalent, key selection criteria include VCC-to-BATT switchover hysteresis (±20mV), CE IN-to-CE OUT propagation delay (≤9ns), 10µA quiescent current, open-drain active-low RESET output, and SOT23-8 package compatibility with space-constrained µP systems.
Technical Context
The MAX6365PKA29-T integrates a precision voltage monitor, VCC/BATT power-path MOSFET switch, and debounced MR input into a single 8-pin SOT23 device. Its reset generator asserts continuously during VCC brownout (<2.93V) and remains active for ≥150ms after VCC recovery, while its chip-enable gating blocks CE signals with ≤9ns propagation delay and <100Ω on-resistance when reset is deasserted.
Battery switchover occurs only when both conditions are met: VCC falls below 2.93V *and* VBATT exceeds VCC by >20mV - ensuring stable SRAM retention without chatter. The internal 20kΩ MR pullup enables direct connection to momentary switches, eliminating external components for manual reset functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±70mV - precisely monitors +3.0V/+3.3V rails without external resistors |
| Supply Voltage Range | 1.2V to 5.5V - supports ultra-low-voltage operation and legacy 5V systems |
| Quiescent Current | 10µA typical - enables multi-year battery life in backup mode |
| Reset Timeout Period | 150ms minimum - ensures reliable µP initialization across temperature (-40°C to +85°C) |
| VCC-to-BATT Switchover Hysteresis | ±20mV - prevents oscillation during slow VCC decay/fall |
| CE IN to CE OUT Propagation Delay | 2ns to 9ns - compatible with high-speed µP address/data buses |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration and level translation |
Pinout & Package
MAX6365PKA29-T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for compact PCB layouts in portable and industrial control applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low during VCC brownout, MR activation, or power-up; requires external pullup |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low disables write path during fault |
| 3 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance |
| 4 MR | Manual reset input | Debounced logic input with 20kΩ internal pullup to VCC; low asserts reset |
| 5 VCC | Main supply input | Powers device and supplies OUT during normal operation (1.2V–5.5V range) |
| 6 OUT | Output power rail | Switches between VCC and BATT; sources up to 150mA from VCC or 10mA from battery |
| 7 BATT | Backup battery input | Connects to coin cell or supercap; powers OUT when VCC fails and VBATT > VCC + 20mV |
| 8 CE OUT | Chip-enable output | Passes CE signal only when reset is inactive; held low for 12µs if CE IN is low at reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| On-board CE gating with 1.5ns propagation delay | Prevents erroneous SRAM writes during power faults without adding board-level logic |
| Debounced manual reset input (MR) | Eliminates need for external RC debounce circuitry; compatible with mechanical switches |
| VCC-to-BATT switchover with 40mV hysteresis | Ensures clean, chatter-free transition to backup power during brownout |
| 10µA quiescent supply current | Extends battery life in always-on backup mode; validated over full -40°C to +85°C range |
| RESET valid down to 1.2V supply | Maintains supervisory function even as main supply collapses near cutoff |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter retaining real-time clock and calibration data during main power loss. IC Role / Device Role / Timing Role: Supervisory controller managing VCC-to-BATT switchover, asserting RESET to halt µP execution, and gating CE to protect SRAM. Use Value: Guarantees 150ms reset hold time and <1µA battery standby current, enabling >5-year shelf life with CR2032 coin cell. |
Use Scenario: DIN-rail mounted PLC module operating in harsh factory environments with unstable 24VDC supply. IC Role / Device Role / Timing Role: Brownout detector and memory protector that isolates SRAM during voltage sags and initiates controlled µP restart. Use Value: 2.93V threshold matches 3.0V logic rail; ±20mV switchover hysteresis prevents false triggering from line noise. |
| Point-of-Sale Terminals | Smart Energy Meters |
Use Scenario: Retail terminal using backup supercapacitor to preserve transaction logs during AC mains interruption. IC Role / Device Role / Timing Role: Power supervisor coordinating VCC/BATT handoff, generating reset pulse, and disabling memory writes via CE gating. Use Value: Open-drain RESET supports shared bus topology; 10µA ICC enables >100-hour backup runtime with 0.1F supercap. |
Use Scenario: Utility meter maintaining timekeeping and tariff data during grid outages lasting minutes to hours. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 3.3V MCU rail and provides battery-backed SRAM retention with CE signal blocking. Use Value: Factory-trimmed 2.93V threshold eliminates calibration; 1.5ns CE propagation delay preserves timing margins in 10MHz SPI interfaces. |
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 2.93V threshold and SOT23-8 package, but uses push-pull (not open-drain) RESET output | Requires no external pullup resistor; incompatible with wired-OR bus configurations | Select when system needs active-drive RESET without external components |
| 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 MAX6365PKA29-T in battery-backup or SRAM protection roles | Choose only for cost-sensitive non-backup applications where CE gating is unnecessary |
Compared with MAX6365LKA29-T, MAX6365PKA29-T offers flexible open-drain RESET for bus sharing, while TPS3808G33DBVR reduces footprint and quiescent current but sacrifices battery backup, CE gating, and manual reset - making it unsuitable as a functional replacement.
Availability
MAX6365PKA29-T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC modules, point-of-sale terminals, and smart energy meters requiring stable component supply and 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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6365–MAX6368 family was engineered specifically for µP-based systems needing integrated power monitoring, battery backup, and memory write protection - reducing bill-of-materials count and PCB area versus discrete solutions.
FAQ
What is the exact reset threshold voltage of MAX6365PKA29-T?
The MAX6365PKA29-T has a factory-trimmed reset threshold of 2.93V, with guaranteed tolerance of ±70mV (2.85V to 3.00V) across the full operating temperature range of -40°C to +85°C. This value is laser-trimmed during production and does not require external calibration. The '29' suffix in MAX6365PKA29-T explicitly denotes this 2.93V threshold variant.
Does MAX6365PKA29-T support battery backup for SRAM, and how does switchover work?
Yes, MAX6365PKA29-T provides automatic VCC-to-BATT switchover for SRAM backup. Switchover activates only when two conditions are met simultaneously: VCC drops below 2.93V *and* VBATT exceeds VCC by more than 20mV. This 40mV hysteresis prevents oscillation during slow voltage transitions. When active, OUT connects to BATT and sources up to 10mA, preserving SRAM contents with <1µA battery standby current.
What type of RESET output does MAX6365PKA29-T provide, and what are its drive requirements?
MAX6365PKA29-T provides an open-drain active-low RESET output. It requires an external pullup resistor to a valid logic rail (e.g., VCC or another supply). The output sinks up to 1.6mA while asserted (VOL ≤ 0.3V), supporting standard TTL/CMOS logic levels. This configuration enables wired-OR connections with other reset sources and simplifies level translation in mixed-voltage systems.
How does the manual reset input (MR) function on MAX6365PKA29-T?
The MR pin on MAX6365PKA29-T is a debounced, internally pulled-up (20kΩ to VCC) input. Driving MR low asserts RESET continuously; RESET remains asserted for ≥150ms after MR returns high. No external debounce components are needed - a simple momentary switch from MR to GND suffices. MR accepts TTL/CMOS logic levels and tolerates noise via built-in filtering, making it ideal for front-panel reset buttons in industrial equipment.
Can MAX6365PKA29-T be used without a backup battery?
Yes, MAX6365PKA29-T operates fully without a backup battery. In this configuration, connect BATT to GND and tie OUT directly to VCC. All supervisory functions - including power-on reset, brownout detection, manual reset, and CE gating - remain fully operational. The device draws only 10µA quiescent current, making it suitable for cost-sensitive applications where battery backup is unnecessary.
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:
- 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 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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