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Analog Devices Inc./Maxim Integrated MAX6367LKA31-T
- Part No.:
- MAX6367LKA31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367LKA31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,850
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Product details
Overview
The MAX6367LKA31-T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup control, chip-enable gating, and BATT ON indicator output. It monitors VCC supply voltage (reset threshold 3.00V–3.15V), provides active-high BATT ON signaling during backup mode, asserts reset on power-up/down/brownout, and supports 1.2V minimum operating voltage. It is used in portable equipment requiring reliable memory retention during main supply failure.
For engineers reviewing the MAX6367LKA31-T datasheet, MAX6367LKA31-T pinout, MAX6367LKA31-T application, or MAX6367LKA31-T equivalent, this page delivers verified functional identity, confirmed SOT23-8 package mapping, validated BATT ON timing behavior, exact reset timeout (150ms min), and real-world substitution guidance for battery-backed µP systems.
Technical Context
The MAX6367LKA31-T integrates a precision voltage monitor with factory-trimmed 3.08V typical reset threshold, a bidirectional VCC/BATT switchover MOSFET (RON ≤ 4.6Ω at VCC = 2.38V), and a push-pull BATT ON output that drives high only when VCC < VTH and VCC < VBATT − 20mV. Its CE IN-to-CE OUT path uses a transmission gate with 1.5ns propagation delay and 20–100Ω on-resistance.
It operates across −40°C to +85°C with guaranteed RESET/RESET validity down to 1.2V (VCC or VBATT), 10µA quiescent current in normal operation, and 3µA battery-backup supply current. The BATT ON output 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 | 3.00V–3.15V (factory preset); ensures reliable reset assertion before 3.3V logic brownout |
| Reset Timeout Period | 150ms minimum; guarantees µP initialization completes before release |
| Operating Voltage Range | 1.2V to 5.5V (VCC or VBATT); enables direct interface with ultra-low-voltage systems |
| Quiescent Supply Current | 10µA typical; minimizes standby power in battery-critical applications |
| BATT ON Output Type | Push-pull active-high; provides clean, rail-to-rail status signal without external pull-up |
| VCC-to-OUT On-Resistance | 4.6Ω max at VCC = 2.38V, IOUT = 25mA; limits voltage drop under 65mA load |
| Supply Transient Immunity | Withstands 30µs negative transients 100mV below VTH; reduces false resets in noisy environments |
Pinout & Package
Package: 8-pin SOT23, surface-mount, lead(Pb)-free option available (replace "-T" with "+T").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC undervoltage, MR low, or watchdog timeout; requires external pull-down for logic-low default |
| 2 CE IN | Chip-enable input | Controls gating of CE signal to SRAM; low disables write access during power fault |
| 3 GND | Ground reference | Common return for all internal circuits and output drivers |
| 4 BATT ON | Battery-on status indicator | Push-pull output driven high only in battery-backup mode; sinks 3.2mA at 0.4V |
| 5 VCC | Main supply input | Power source for supervisory logic and VCC-to-OUT switch; monitored for reset generation |
| 6 OUT | Regulated output | Sources from VCC normally; switches to BATT during brownout; delivers up to 150mA |
| 7 BATT | Backup battery input | Provides hold-up power when VCC falls; requires ≥20mV above VCC to engage switchover |
| 8 CE OUT | Controlled chip-enable output | Passes CE IN when reset inactive; held low for 12µs after reset assertion if CE IN was low |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On Output Indicator | Push-pull BATT ON signal eliminates need for external pull-up and simplifies status monitoring in portable designs |
| On-board Chip-Enable Gating | 1.5ns propagation delay and 20–100Ω on-resistance enable safe, high-speed SRAM write protection without added logic |
| Precision Reset Threshold | ±0.07V tolerance over temperature ensures consistent 3.08V trip point for 3.3V systems |
| Ultra-Low Quiescent Current | 10µA ICC and 3µA IBACK extend battery life in always-on backup applications |
| VCC/BATT Switchover Hysteresis | 40mV hysteresis prevents oscillation during slow VCC decay near switchover threshold |
Applications
| Portable Medical Monitors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous ECG waveform capture with nonvolatile RAM retention during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC providing VCC brownout detection, automatic BATT switchover, and BATT ON status flag to MCU. Use Value: Guarantees 150ms reset hold time and <1.5ns CE gating delay to prevent SRAM corruption during transition. | Use Scenario: Remote environmental sensor node logging temperature/humidity to SRAM, powered by Li-ion battery with USB charging. IC Role / Device Role / Timing Role: Power supervisor enabling seamless VCC-to-BATT handoff and indicating backup activation via BATT ON. Use Value: 10µA quiescent current extends battery runtime; 4.6Ω VCC-to-OUT RON maintains >3.0V at 65mA load. |
| Point-of-Sale Terminals | Set-Top Box Firmware Storage |
Use Scenario: Secure transaction data buffering in volatile SRAM during sudden mains dropout or battery swap. IC Role / Device Role / Timing Role: Real-time voltage monitor and chip-enable gate enforcing write lock during power anomaly. Use Value: CE OUT held low for 12µs after reset assertion ensures completion of last memory write before disable. | Use Scenario: Preserving bootloader configuration and channel tuning tables in CMOS SRAM during cable disconnect or power cycling. IC Role / Device Role / Timing Role: Battery-backed supervisor asserting BATT ON to trigger firmware-safe shutdown sequence. Use Value: BATT ON push-pull output directly drives MCU GPIO interrupt, eliminating debounce components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA31-T | Same reset threshold (3.00V–3.15V) and BATT ON function, but open-drain RESET output instead of open-drain active-high RESET | Requires external pull-down for active-high reset logic; less suitable where MCU expects true active-high drive | Select MAX6367LKA31-T when push-pull BATT ON and open-drain active-high RESET are required together |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no BATT ON output, no battery switchover, 350ms reset timeout, SOT23-6 package | Lacks battery-backup capability and chip-enable gating; limited to basic reset-only applications | Choose MAX6367LKA31-T when battery switchover, CE gating, and BATT ON status indication are mandatory |
Compared with MAX6367PKA31-T, the MAX6367LKA31-T provides identical supervision and BATT ON functionality but with an open-drain active-high RESET output-critical for interfacing with MCUs lacking internal pull-ups. Versus TPS3808G33DBVR, it adds full battery-backup control and memory write protection, making it suitable for SRAM-retentive embedded systems.
Availability
MAX6367LKA31-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial data loggers, and point-of-sale terminals requiring stable component supply with long-term lifecycle support.
Supply support for MAX6367LKA31-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, sensing, and connectivity applications.
The MAX6365–MAX6368 family targets space-constrained µP systems needing integrated power monitoring, battery switchover, and memory write protection-all in a single 8-pin SOT23 package.
FAQ
What is the exact reset threshold voltage range for MAX6367LKA31-T?
The MAX6367LKA31-T has a factory-trimmed reset threshold range of 3.00V (min), 3.08V (typ), and 3.15V (max) at TA = +25°C, guaranteed over −40°C to +85°C. This matches the "KA31" suffix in the ordering code and is optimized for reliable supervision of 3.3V power rails without premature triggering.
Does MAX6367LKA31-T provide battery switchover functionality?
Yes, the MAX6367LKA31-T automatically switches the OUT pin from VCC to BATT when VCC falls below the reset threshold and remains at least 20mV below VBATT. The internal MOSFET's on-resistance is ≤4.6Ω at 2.38V, supporting up to 150mA from VCC and sustaining SRAM operation during main supply interruption.
What is the function of the BATT ON pin on MAX6367LKA31-T?
The BATT ON pin on MAX6367LKA31-T is a push-pull active-high output that asserts high exclusively during battery-backup mode-i.e., when VCC < VTH and VCC < (VBATT − 20mV). It sinks 3.2mA at 0.4V and can directly drive MCU GPIOs or external pass transistors, eliminating need for pull-up resistors.
How does MAX6367LKA31-T protect memory writes during power failure?
The MAX6367LKA31-T protects memory writes using internal chip-enable (CE) gating: when reset asserts, CE OUT is disabled or held low for 12µs if CE IN was low, preventing spurious writes to SRAM. The CE IN-to-CE OUT path features 1.5ns propagation delay and 20–100Ω on-resistance, compatible with high-speed µPs and DSPs.
What package type and pin count does MAX6367LKA31-T use?
The MAX6367LKA31-T uses an 8-pin SOT23 surface-mount package with standard pinout: Pin 1 = RESET (active-high open-drain), Pin 4 = BATT ON, Pin 5 = VCC, Pin 6 = OUT, Pin 7 = BATT, Pin 8 = CE OUT. Lead(Pb)-free version is ordered as MAX6367LKA31+T.
MAX6367LKA31-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:
- 3.08V
- 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
MAX6367LKA31-T FAQ
1.How can I place an order for MAX6367LKA31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367LKA31-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 MAX6367LKA31-T reliable?
The price and inventory of MAX6367LKA31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367LKA31-T is usually 5 days.
3.What payment methods are accepted for MAX6367LKA31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367LKA31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367LKA31-T?
MAX6367LKA31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367LKA31-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 MAX6367LKA31-T?
For technical support, including MAX6367LKA31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367LKA31-T requirements.
6.How does Aetrix verify that MAX6367LKA31-T is sourced from the original manufacturer or authorized distributors?
All MAX6367LKA31-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 MAX6367LKA31-T meets industry standards.
7.What is the process for return or replacement of MAX6367LKA31-T?
All MAX6367LKA31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367LKA31-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 MAX6367LKA31-T part is unused and in its original packaging.
Return procedure for MAX6367LKA31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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