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Analog Devices Inc./Maxim Integrated MAX6367LKA26+T
- Part No.:
- MAX6367LKA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367LKA26+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6367LKA26+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup switchover, chip-enable gating, and BATT ON indicator output. It monitors VCC supply (1.2V–5.5V), asserts reset when VCC falls below 2.63V (typ), provides 150ms minimum reset timeout, and switches OUT to backup battery during brownout. Used in portable equipment requiring nonvolatile memory retention during main power loss.
For engineers reviewing the MAX6367LKA26+T datasheet, MAX6367LKA26+T pinout, MAX6367LKA26+T application, or MAX6367LKA26+T equivalent, key selection criteria include its 2.63V factory-trimmed reset threshold, push-pull BATT ON output, 8-pin SOT23 package, 10µA quiescent current, and guaranteed reset assertion down to 1.2V VCC/VBATT.
Technical Context
The MAX6367LKA26+T integrates a precision voltage monitor, battery switchover MOSFET control, and dedicated BATT ON push-pull output that drives high only when VCC < VTH and VCC < VBATT. Its internal comparator uses a trimmed 2.63V threshold (±70mV over temperature) and features 150ms minimum reset timeout with glitch immunity against transients as short as 30µs at 100mV overdrive.
It implements chip-enable gating via a transmission gate between CE IN and CE OUT (1.5ns propagation delay, 20–100Ω on-resistance), and supports dual-supply operation: OUT sources from VCC normally, then seamlessly switches to VBATT during brownout with 40mV hysteresis to prevent chatter. BATT ON sinks 3.2mA at 0.4V saturation and sources ~10µA from OUT in backup mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V–2.70V (min/typ/max); factory-trimmed for +3.3V system monitoring with ±70mV tolerance over -40°C to +85°C. |
| Reset Timeout Period | 150–280ms; ensures µP completes full initialization before release, compatible with standard boot sequences. |
| Quiescent Supply Current | 10–50µA (typ/max); enables long-term battery backup with sub-1µA drain in standby when VCC = 0V. |
| BATT ON Output Type | Push-pull active-high; drives high during battery-backup mode, sinks 3.2mA at 0.4V, eliminates need for external pull-up. |
| VCC Operating Range | 1.2V–5.5V; supports single-cell Li-ion, coin-cell, and multi-rail embedded systems without auxiliary regulators. |
| Chip-Enable Propagation Delay | 1.5ns (typ); preserves timing integrity for high-speed µP/DSP address/data bus gating without added latency. |
| Supply Transient Immunity | Withstands 30µs negative-going VCC glitches at 100mV overdrive; reduces false resets in noisy industrial environments. |
Pinout & Package
MAX6367LKA26+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead(Pb)-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC brownout, manual reset, or watchdog timeout; requires external pull-down for logic-low interface. |
| 2 CE IN | Chip-enable input | Controls gating path to CE OUT; tied to GND or OUT if unused; internal 20kΩ pullup to VCC not present on this variant. |
| 3 GND | Ground reference | Primary return path for VCC, BATT, and all internal circuitry; must be low-impedance connection for stable reset timing. |
| 4 BATT ON | Battery-backup status indicator | Push-pull output that drives high only when VCC < VTH and VCC < VBATT; used for LED indication or external pass transistor base drive. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation; reset asserted when below 2.63V. |
| 6 OUT | Regulated output | Sources from VCC (up to 150mA) or VBATT (up to 40mA) depending on switchover conditions; powers SRAM or real-time clock. |
| 7 BATT | Backup battery input | Accepts 0V–6V; activates switchover when VBATT > VCC + 20mV; draws <1µA standby current when VCC = 0V. |
| 8 CE OUT | Chip-enable output | Gated version of CE IN; disabled during reset to prevent erroneous writes to CMOS RAM; 12µs hold time after reset assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-on output indicator | Dedicated push-pull BATT ON pin confirms backup mode activation without software polling or external logic. |
| Precision 2.63V reset threshold | Factory-trimmed for +3.3V systems with ±70mV accuracy over full temperature range, eliminating external resistor networks. |
| Ultra-low 10µA quiescent current | Enables multi-year operation from coin-cell batteries in backup mode, with <1µA drain when VCC = 0V. |
| 1.5ns chip-enable propagation delay | Preserves µP bus timing integrity during power transitions, supporting high-speed DSP and flash memory interfaces. |
| 40mV switchover hysteresis | Prevents oscillation during slow VCC ramp-down by requiring 40mV difference between switch-in and switch-out thresholds. |
Applications
| Portable Medical Monitor | Industrial PLC Data Logger |
|---|---|
Use Scenario: Battery-powered ECG monitor retains real-time waveform data during AC adapter disconnection or low-battery shutdown. IC Role / Device Role / Timing Role: Supervisory IC monitors main 3.3V rail, triggers BATT ON to enable backup power path, and gates CE to freeze SRAM writes during transition. Use Value: Prevents data corruption during 150ms reset window while maintaining timestamp continuity via RTC powered from BATT. |
Use Scenario: Remote sensor node logs process data to nonvolatile FRAM; main 5V supply drops during lightning-induced brownout. IC Role / Device Role / Timing Role: MAX6367LKA26+T detects VCC sag below 2.63V, asserts reset, switches OUT to 3V coin cell, and disables CE to halt write cycles. Use Value: Guarantees atomic write completion before power loss, with BATT ON signaling backup activation to host controller for fault logging. |
| Retail POS Terminal | Smart Energy Meter |
Use Scenario: Credit card terminal loses mains power mid-transaction; must preserve encrypted transaction buffer and secure key storage. IC Role / Device Role / Timing Role: Acts as power-fail supervisor: asserts reset, enables battery-backed SRAM, and holds CE low to lock memory access until safe state is reached. Use Value: Meets PCI PTS requirements for tamper-resistant memory retention with <10µA backup current and 150ms deterministic reset hold time. |
Use Scenario: Utility meter maintains time-of-use billing registers and firmware state during grid outage lasting minutes to hours. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; triggers BATT ON to activate supercapacitor backup path and gates CE to protect EEPROM configuration data. Use Value: Eliminates need for discrete MOSFET + comparator solution, reducing BOM count and PCB area in space-constrained meter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA26+T | Same 2.63V threshold and BATT ON function, but open-drain RESET output instead of open-drain active-high; different pinout (RESET on Pin 1 vs. Pin 2). | Requires external pull-down for RESET signal; less suitable for direct µP reset inputs expecting active-high assertion. | Select MAX6367LKA26+T when active-high open-drain RESET is required and board layout accommodates Pin 1 placement. |
| MAX6367HKA26+T | Identical functionality and pinout, but rated for higher sink current on BATT ON (60mA vs. 3.2mA) and specified for extended temperature range (-40°C to +125°C). | Supports automotive under-hood or industrial high-temp environments where standard grade may fail. | Choose MAX6367HKA26+T for designs requiring AEC-Q100 qualification or operation above +85°C ambient. |
Compared with MAX6367PKA26+T and MAX6367HKA26+T, the MAX6367LKA26+T offers optimized cost and footprint for commercial-grade portable equipment, with guaranteed 10µA supply current and 2.63V threshold accuracy - making it ideal for battery-sensitive consumer and medical devices where extended temp rating is unnecessary.
Availability
MAX6367LKA26+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial data loggers, retail POS terminals, and smart energy meters requiring stable component supply across production lifecycles.
Supply support for MAX6367LKA26+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, communications, and consumer applications.
The MAX6365–MAX6368 family was designed specifically for microprocessor-based systems needing integrated power supervision, battery switchover, and memory write protection in ultra-small footprints - targeting space-constrained portable and battery-operated equipment.
FAQ
What is the exact reset threshold voltage for MAX6367LKA26+T?
The MAX6367LKA26+T has a factory-trimmed reset threshold of 2.55V (min), 2.63V (typ), and 2.70V (max) over the full -40°C to +85°C operating range. This 2.63V nominal value is optimized for reliable monitoring of +3.3V power rails and is guaranteed by production testing, not typical characterization.
Does MAX6367LKA26+T support battery-backup operation with zero VCC?
Yes - MAX6367LKA26+T supports true zero-VCC battery-backup operation. When VCC = 0V and VBATT ≥ 2.25V, the device powers from battery, asserts RESET high, drives BATT ON high, and connects BATT to OUT. Quiescent current drops to ≤3µA in this state, enabling multi-year coin-cell life.
How does the BATT ON output behave during power transitions?
The BATT ON output of MAX6367LKA26+T is a push-pull driver that goes high only when both conditions are met: VCC < VTH (2.63V) and VCC < VBATT. It remains high throughout battery-backup mode and returns low within 12µs after VCC rises above VBATT + 20mV, providing unambiguous hardware-level backup status signaling.
Can MAX6367LKA26+T be used without a backup battery?
Yes - MAX6367LKA26+T operates fully without a backup battery. Connect BATT to GND and OUT to VCC. All supervision functions (reset generation, CE gating, BATT ON assertion) remain active, with BATT ON held low. The device consumes only 10–50µA, making it suitable for cost-sensitive non-backup applications.
What is the maximum load current supported on the OUT pin of MAX6367LKA26+T?
MAX6367LKA26+T delivers up to 150mA from VCC when VCC ≥ 4.75V and IOUT = 150mA (RON = 3.1Ω), and up to 40mA from VBATT when VBATT ≥ 2.25V and IOUT = 5mA (VOUT = VBATT – 0.15V). The OUT pin is short-circuit protected for up to 10 seconds, ensuring robustness in field deployments.
MAX6367LKA26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6367LKA26+T FAQ
1.How can I place an order for MAX6367LKA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367LKA26+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 MAX6367LKA26+T reliable?
The price and inventory of MAX6367LKA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367LKA26+T is usually 5 days.
3.What payment methods are accepted for MAX6367LKA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367LKA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367LKA26+T?
MAX6367LKA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367LKA26+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 MAX6367LKA26+T?
For technical support, including MAX6367LKA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367LKA26+T requirements.
6.How does Aetrix verify that MAX6367LKA26+T is sourced from the original manufacturer or authorized distributors?
All MAX6367LKA26+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 MAX6367LKA26+T meets industry standards.
7.What is the process for return or replacement of MAX6367LKA26+T?
All MAX6367LKA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367LKA26+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 MAX6367LKA26+T part is unused and in its original packaging.
Return procedure for MAX6367LKA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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