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Analog Devices Inc./Maxim Integrated MAX6367LKA44+
- Part No.:
- MAX6367LKA44+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367LKA44+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
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Product details
Overview
MAX6367LKA44+ from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup control and chip-enable gating, featuring a factory-preset 4.38V reset threshold, active-high BATT ON output, and operation down to 1.2V supply voltage. It provides VCC monitoring, automatic VCC-to-battery switchover, memory write protection via CE gating, and battery-status indication - used in portable POS terminals, industrial controllers, and set-top boxes requiring reliable power-fail response.
For engineers reviewing the MAX6367LKA44+ datasheet, MAX6367LKA44+ pinout, MAX6367LKA44+ application, or MAX6367LKA44+ equivalent, key selection criteria include its 4.38V reset threshold accuracy, guaranteed RESET/RESET validity down to 1.2V, 150ms minimum reset timeout, BATT ON push-pull high-indicator function, and SOT23-8 package compatibility with space-constrained µP systems.
Technical Context
The MAX6367LKA44+ integrates a precision voltage monitor with ±1.5% threshold tolerance (4.25V–4.50V range), a battery-switchover comparator with 40mV hysteresis, and a dedicated push-pull BATT ON output that asserts high only when VCC falls below the reset threshold *and* VBATT exceeds VCC by ≥20mV. Its CE gating path uses a transmission gate with 1.5ns propagation delay and <100Ω on-resistance during normal operation.
Unlike MAX6365/MAX6366 variants, this device omits manual reset input and watchdog timer, dedicating Pin 4 exclusively to BATT ON functionality. The internal reset generator guarantees monotonic assertion for ≥150ms after VCC recovery, with immunity to transients ≤30µs at 100mV overdrive - critical for brownout resilience in battery-powered equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V (factory preset, ±1.5% over -40°C to +85°C) - ensures reliable detection of 4.5V supply collapse before data corruption. |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during deep brownout and enables direct connection to Li-ion or coin-cell backup sources. |
| BATT ON Output Type | Push-pull active-high - drives high without external pull-up, sinking 3.2mA at 0.4V saturation for LED/status logic interfacing. |
| Reset Timeout Period | 150ms minimum - guarantees µP initialization completes before release, meeting JEDEC JESD78 latch-up immunity requirements. |
| Quiescent Current | 15µA typical (VCC = 5.5V) - extends battery life in always-on backup mode beyond 10 years for 20mAh cells. |
| CE Gating Propagation Delay | 1.5ns - preserves timing integrity for SRAM access cycles up to 500MHz in high-speed embedded controllers. |
| VCC-to-BATT Switchover Hysteresis | 40mV - prevents oscillation during slow VCC decay, ensuring single, clean transition to backup power. |
Pinout & Package
MAX6367LKA44+ is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for PCB area-constrained applications including handheld instruments and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC brownout; requires external pull-down for µP reset input compatibility. |
| 2 CE IN | Chip-enable input | Directly connects to µP CE signal; gated internally to prevent SRAM writes during power failure. |
| 3 GND | Ground reference | Common return for VCC, BATT, and all digital outputs; must be low-impedance for noise immunity. |
| 4 BATT ON | Battery-backup status indicator | Push-pull high output signaling valid battery power - used for LED drive or enable control of auxiliary circuits. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation. |
| 6 OUT | Regulated output rail | Sources from VCC (≤150mA) or BATT (≤40mA); powers SRAM/RTC during main supply loss. |
| 7 BATT | Backup battery input | Accepts 0V–6V; activates switchover when VBATT > VCC + 20mV and VCC < 4.38V. |
| 8 CE OUT | Gated chip-enable output | Passes CE IN unaltered unless reset asserted - then blocks transitions for 12µs to complete pending memory access. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On Output Indicator | Dedicated push-pull BATT ON pin eliminates need for external transistor or logic to signal backup mode activation. |
| Precision Reset Threshold | 4.38V ±1.5% over full temperature range ensures consistent triggering across industrial environments. |
| Ultra-Low Quiescent Current | 15µA typical supply current minimizes drain on backup batteries during extended storage or standby. |
| Chip-Enable Gating with 1.5ns Delay | Enables real-time SRAM write protection without degrading µP bus timing in high-speed embedded designs. |
| 40mV Switchover Hysteresis | Prevents chattering during marginal VCC conditions, guaranteeing single, deterministic transition to battery power. |
Applications
| Portable POS Terminals | Industrial Programmable Logic Controllers |
|---|---|
Use Scenario: Battery-backed transaction logging during AC power interruption in retail kiosks. IC Role / Device Role / Timing Role: Supervisory controller enabling seamless VCC-to-battery switchover and asserting BATT ON to trigger nonvolatile memory save routines. Use Value: Prevents loss of sales data by maintaining SRAM power and signaling backup mode within 20µs of VCC drop below 4.38V. | Use Scenario: Preserving I/O state and configuration registers during factory floor power dips. IC Role / Device Role / Timing Role: Real-time power monitor with CE gating that halts PLC program execution during brownout while retaining volatile context. Use Value: Eliminates need for external supervisor ICs and discrete MOSFETs - reduces BOM count by 3 components per slot. |
| Set-Top Box Firmware Recovery | Medical Patient Monitor Data Retention |
Use Scenario: Safeguarding bootloader integrity and channel lineup during brief utility outages. IC Role / Device Role / Timing Role: Reset generator and memory protector ensuring safe reboot sequence initiation only after stable VCC restoration. Use Value: Guarantees 150ms reset hold time meets STB industry requirement for NAND flash write completion before processor restart. | Use Scenario: Maintaining real-time vital sign buffers during AC/DC adapter failure in bedside monitors. IC Role / Device Role / Timing Role: Dual-role supervisor providing both BATT ON status flag and CE gating to freeze ECG waveform acquisition during power transition. Use Value: Enables Class II medical device compliance by eliminating data gaps during 100ms–500ms brownout windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA44+ | Same reset threshold (4.38V) and BATT ON function, but features push-pull RESET output instead of open-drain. | Requires no external pull-down resistor on RESET line; better suited for µPs with internal weak pull-ups. | Select when system RESET input lacks external pull-down and benefits from reduced component count. |
| MAX6367HKA44+ | Identical functionality and pinout, but rated for automotive AEC-Q100 Grade 3 (-40°C to +105°C) and qualified for under-hood use. | Supports extended temperature operation and enhanced ESD robustness required in vehicle infotainment head units. | Select for automotive applications where ambient temperature exceeds +85°C or ISO 11452-2 immunity is mandated. |
Compared with MAX6367LKA44+, the PKA variant simplifies RESET interface design by removing external biasing, while the HKA variant extends thermal and reliability margins for harsh environments - neither offers pin-compatible substitution without verifying µP reset input topology and ambient operating envelope.
Availability
MAX6367LKA44+ is available at Aetrix Electronics and suitable for portable POS terminals, industrial programmable logic controllers, and set-top box firmware recovery systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6367LKA44+ 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 industrial, computing, and consumer systems.
The MAX6365–MAX6368 family delivers integrated power-supply supervision, battery switchover, and memory protection for space- and power-sensitive microprocessor systems - targeting portable, battery-backed, and mission-critical embedded applications.
FAQ
What is the exact reset threshold voltage of the MAX6367LKA44+?
The MAX6367LKA44+ has a factory-trimmed reset threshold of 4.38V, with a guaranteed range of 4.25V to 4.50V over the full -40°C to +85°C operating temperature range. This value is fixed and cannot be adjusted externally - it is defined by the "44" suffix in the part number per Maxim's Reset Threshold Ranges table.
Does the MAX6367LKA44+ provide manual reset capability?
No, the MAX6367LKA44+ does not include a manual reset input. It belongs to the MAX6367 series, which implements the BATT ON output function instead. Manual reset is exclusive to the MAX6365 variant (e.g., MAX6365LKA44+), while the MAX6367LKA44+ dedicates Pin 4 solely to the BATT ON indicator.
How does the BATT ON output behave during power transitions?
The BATT ON output of the MAX6367LKA44+ goes high only when two conditions are simultaneously met: VCC falls below 4.38V *and* VBATT exceeds VCC by at least 20mV. It remains high until VCC rises above 4.38V or VBATT drops below VCC – 20mV, providing unambiguous battery-backup status with built-in hysteresis.
Can the MAX6367LKA44+ operate with a 1.8V main supply?
Yes, the MAX6367LKA44+ operates from VCC as low as 1.2V, fully supporting 1.8V systems. Its reset comparator remains functional, RESET output is valid down to 1.2V, and BATT ON retains push-pull drive strength - enabling use in low-voltage µP domains such as ARM Cortex-M0+ or RISC-V SoCs with 1.8V I/O rails.
What is the maximum load the BATT ON output can drive?
The BATT ON output of the MAX6367LKA44+ can sink up to 3.2mA while maintaining ≤0.4V saturation voltage at 25°C. It is designed to directly drive LEDs, optocouplers, or logic inputs - but not high-current loads. For higher current, use BATT ON as an enable signal for an external P-channel MOSFET, as shown in Maxim's Figure 3 application circuit.
MAX6367LKA44+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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
MAX6367LKA44+ FAQ
1.How can I place an order for MAX6367LKA44+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367LKA44+ 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 MAX6367LKA44+ reliable?
The price and inventory of MAX6367LKA44+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367LKA44+ is usually 5 days.
3.What payment methods are accepted for MAX6367LKA44+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367LKA44+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367LKA44+?
MAX6367LKA44+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367LKA44+ 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 MAX6367LKA44+?
For technical support, including MAX6367LKA44+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367LKA44+ requirements.
6.How does Aetrix verify that MAX6367LKA44+ is sourced from the original manufacturer or authorized distributors?
All MAX6367LKA44+ 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 MAX6367LKA44+ meets industry standards.
7.What is the process for return or replacement of MAX6367LKA44+?
All MAX6367LKA44+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367LKA44+, 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 MAX6367LKA44+ part is unused and in its original packaging.
Return procedure for MAX6367LKA44+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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