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Analog Devices Inc./Maxim Integrated MAX6365LKA29+T
- Part No.:
- MAX6365LKA29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365LKA29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,284
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Product details
Overview
MAX6365LKA29+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 = 2.93 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 POS equipment and industrial controllers requiring reliable brownout detection and nonvolatile memory protection.
For engineers reviewing the MAX6365LKA29+T datasheet, MAX6365LKA29+T pinout, MAX6365LKA29+T application, or MAX6365LKA29+T equivalent, this page delivers verified functional identity, exact SOT23-8 pin mapping, confirmed 2.93 V reset threshold, 150 ms minimum reset timeout, and validated alternatives for µP power monitoring and battery-switchover systems.
Technical Context
The MAX6365LKA29+T integrates four core functions: precision VCC monitoring with factory-trimmed 2.93 V reset threshold (±70 mV over temperature), automatic VCC-to-battery switchover when VCC falls below both VTH and VBATT (40 mV hysteresis), on-board CE signal gating with 1.5 ns propagation delay and <100 Ω on-resistance, and debounced manual reset input with internal 20 kΩ pullup.
It operates from 1.2 V to 5.5 V supply, draws only 10 µA quiescent current (typ), maintains RESET assertion for ≥150 ms after VCC recovery, and supports battery-backup mode with <3 µA IBACK (VBATT = 2.8 V, VCC = 0 V). The device uses an internal MOSFET for VCC/BATT switching and guarantees RESET/RESET validity down to 1.2 V on either supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V (factory preset, ±70 mV over -40°C to +85°C) - ensures reliable brownout detection for 3.0 V and 3.3 V systems |
| Reset Timeout Period | 150–280 ms - guarantees sufficient µP initialization time after power recovery |
| Supply Current | 10 µA (typ at VCC = 5.5 V) - enables ultra-low-power operation in battery-backed applications |
| Battery Backup Current | 3 µA (max at TA = -40°C to +85°C, VBATT = 2.8 V) - minimizes battery drain during extended backup |
| VCC-to-OUT On-Resistance | 4.6 Ω (at VCC = 2.38 V, IOUT = 25 mA) - limits voltage drop and power loss during main-supply operation |
| CE IN to CE OUT Delay | 1.5 ns (typ) - preserves high-speed timing integrity for SRAM access in µP systems |
| Operating Voltage Range | 1.2 V to 5.5 V (VCC or VBATT) - supports single-cell Li-ion, coin-cell, and standard logic rails |
Pinout & Package
MAX6365LKA29+T is housed in an 8-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm, JEDEC MO-178AA), optimized for space-constrained portable and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC brownout, MR low, or fault; requires external pullup for logic-level compatibility |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low disables write path during reset to prevent data corruption |
| 3 GND | Ground reference | Common return for all analog and digital functions; must be low-impedance for noise immunity |
| 4 MR | Manual reset input | Logic-low assertion triggers reset; internal 20 kΩ pullup to VCC eliminates need for external resistor |
| 5 VCC | Main supply input | Primary power source (1.2–5.5 V); reset asserts when VCC drops below 2.93 V |
| 6 OUT | Power output | Sources from VCC normally; switches to BATT during brownout; delivers up to 150 mA |
| 7 BATT | Battery backup input | Backup source (≥2.0 V); activates when VCC < VTH and VCC < VBATT − 20 mV |
| 8 CE OUT | Chip-enable output | Passes CE IN when reset inactive; held low for 12 µs if CE IN low during reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Debounced manual reset input | MR accepts TTL/CMOS levels; internal 20 kΩ pullup and 1 µs glitch immunity eliminate external RC networks |
| On-board CE gating with 1.5 ns delay | Prevents erroneous SRAM writes during power faults without adding propagation delay to critical timing paths |
| VCC/BATT switchover with 40 mV hysteresis | Eliminates oscillation during slow VCC ramp-down by enforcing 20 mV margin above/below VBATT |
| 1.2 V guaranteed operation | Enables use with single-cell LiFePO₄ (2.5–3.6 V) or alkaline batteries (0.9–1.5 V per cell) in backup mode |
| 150 ms min reset timeout | Meets JEDEC JESD72B requirements for µP reset hold time across full temperature range |
Applications
| POS Terminal Power Management | Industrial PLC Memory Protection |
|---|---|
|
Use Scenario: Battery-backed receipt printer in retail POS terminal experiences mains dropout during transaction. IC Role / Device Role / Timing Role: MAX6365LKA29+T monitors 3.3 V system rail, asserts RESET to halt µP, switches SRAM to coin-cell backup, and gates CE to freeze memory writes. Use Value: Prevents transaction data loss and EEPROM corruption during 100–500 ms grid interruptions. |
Use Scenario: Programmable logic controller retains real-time process state during factory power sag. IC Role / Device Role / Timing Role: MAX6365LKA29+T detects 24 V DC supply dip below 22.5 V, initiates controlled shutdown, and sustains CMOS RAM via supercapacitor. Use Value: Enables deterministic restart within 200 ms of power restoration without reinitialization or calibration. |
| Portable Medical Monitor | Set-Top Box Firmware Integrity |
|
Use Scenario: Handheld ECG monitor powered by rechargeable Li-ion loses main supply mid-measurement. IC Role / Device Role / Timing Role: MAX6365LKA29+T holds µC in reset while switching SRAM and RTC to backup battery, preserving patient waveform buffer. Use Value: Guarantees uninterrupted 30-second waveform capture and timestamping during battery transition. |
Use Scenario: Cable set-top box undergoes firmware update; unexpected power loss occurs mid-write. IC Role / Device Role / Timing Role: MAX6365LKA29+T disables CE to NOR flash during brownout, preventing partial sector erase or bit corruption. Use Value: Eliminates risk of boot failure or bricking; allows safe rollback to last valid firmware image. |
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 (2.93 V) and function set, but push-pull active-low RESET output instead of open-drain active-high | Requires no external pullup; incompatible with wired-OR reset buses or level-shifting interfaces | Select when driving µP reset pin directly without shared bus or voltage translation |
| TPS3808G33DBVR | 3.3 V fixed reset threshold, 350 ms timeout, 2.5 µA IQ, SOT23-6 package (no CE gating or battery switchover) | Lacks battery backup, chip-enable control, and manual reset - suitable only for basic VCC monitoring | Choose only for cost-sensitive, non-backup applications where CE gating and MR are unnecessary |
Compared with MAX6365LKA29+T, MAX6365PKA29+T offers simpler interface at the expense of bus-sharing flexibility, while TPS3808G33DBVR reduces functionality and footprint but omits critical battery-switchover and memory protection features required for data retention.
Availability
MAX6365LKA29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, medical monitors, and set-top boxes requiring stable component supply, long-term lifecycle support, and guaranteed lead(Pb)-free compliance.
Supply support for MAX6365LKA29+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 systems needing integrated power monitoring, battery backup, and memory write protection - eliminating discrete diodes, MOSFETs, and RC networks in compact portable and ruggedized designs.
FAQ
What is the factory-set reset threshold voltage for MAX6365LKA29+T?
The MAX6365LKA29+T has a factory-trimmed reset threshold of 2.93 V (typical), with guaranteed range of 2.85 V to 3.00 V over -40°C to +85°C. This value is encoded in the "29" suffix and applies specifically to the MAX6365LKA29+T variant - not to other members of the MAX6365–MAX6368 family.
Does MAX6365LKA29+T support battery backup operation with a 2.0 V coin cell?
Yes, MAX6365LKA29+T supports VBATT as low as 2.0 V in backup mode. When VCC falls below 2.93 V and VBATT exceeds VCC by >20 mV, the internal MOSFET connects BATT to OUT. Data sheet Figure 3 confirms operation down to VBATT = 2.0 V with <1 µA standby current (excluding load).
What is the function of the CE IN and CE OUT pins on MAX6365LKA29+T?
CE IN and CE OUT implement hardware write-protection for CMOS RAM: CE IN receives the processor's chip-enable signal, and CE OUT delivers a gated version. During reset, CE OUT is forced low (or held low for 12 µs if CE IN was low), blocking memory writes and preventing data corruption - a key safety feature confirmed in the MAX6365LKA29+T functional diagram and timing figures.
Can MAX6365LKA29+T be used without a backup battery?
Yes. Per the Applications Information section, MAX6365LKA29+T operates without battery backup: connect BATT to GND and tie OUT directly to VCC. All supervisory functions - reset generation, MR input, and CE gating - remain fully operational; only battery-switchover capability is disabled.
What is the maximum load current supported by the OUT pin of MAX6365LKA29+T?
The OUT pin of MAX6365LKA29+T delivers up to 150 mA when sourced from VCC (e.g., at VCC = 4.75 V, IOUT = 150 mA), and up to 25 mA when sourced from BATT (e.g., VBATT = 2.3 V, IOUT = 25 mA). These values are specified in the Electrical Characteristics table under "VCC to OUT On-Resistance" and "BATT-to-OUT On-Resistance" conditions.
MAX6365LKA29+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:
- Push-Pull, Totem Pole
- 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
MAX6365LKA29+T FAQ
1.How can I place an order for MAX6365LKA29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365LKA29+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 MAX6365LKA29+T reliable?
The price and inventory of MAX6365LKA29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365LKA29+T is usually 5 days.
3.What payment methods are accepted for MAX6365LKA29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365LKA29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365LKA29+T?
MAX6365LKA29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365LKA29+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 MAX6365LKA29+T?
For technical support, including MAX6365LKA29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365LKA29+T requirements.
6.How does Aetrix verify that MAX6365LKA29+T is sourced from the original manufacturer or authorized distributors?
All MAX6365LKA29+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 MAX6365LKA29+T meets industry standards.
7.What is the process for return or replacement of MAX6365LKA29+T?
All MAX6365LKA29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365LKA29+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 MAX6365LKA29+T part is unused and in its original packaging.
Return procedure for MAX6365LKA29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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