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Analog Devices Inc./Maxim Integrated MAX6367LKA46+
- Part No.:
- MAX6367LKA46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367LKA46+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,300
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Product details
Overview
The MAX6367LKA46+ from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup control and chip-enable gating, featuring a factory-preset 4.63V reset threshold, active-high open-drain BATT ON output, and operation down to 1.2V supply voltage. It monitors VCC for power-up, brownout, and power-down events, switches CMOS RAM to backup battery when VCC fails, and gates CE signals to prevent memory corruption in portable industrial controllers.
For engineers reviewing the MAX6367LKA46+ datasheet, MAX6367LKA46+ pinout, MAX6367LKA46+ application, or MAX6367LKA46+ equivalent, key selection criteria include its 4.63V reset threshold accuracy, 150ms minimum reset timeout, BATT ON indicator functionality, and SOT23-8 package compatibility with space-constrained µP systems requiring reliable battery-switchover and write protection.
Technical Context
The MAX6367LKA46+ implements a precision voltage monitor with ±1.5% reset threshold tolerance over -40°C to +85°C, integrated MOSFET-based VCC-to-BATT switchover with 40mV hysteresis, and a push-pull BATT ON output that asserts high during battery-backup mode. Its chip-enable gating path features 1.5ns propagation delay and 20–100Ω on-resistance, enabling direct interface with high-speed µP address decoders.
It operates across 1.2V–5.5V VCC and supports VBATT as low as 2.25V, with guaranteed RESET/RESET validity down to 1.2V and 10µA quiescent current in normal operation. The device enters battery-backup mode only when both VCC < VTH (4.63V) and VCC < VBATT – 20mV, preventing false switching during slow VCC ramps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory preset, ±1.5% tolerance over temp) - ensures reliable detection of +5V supply brownout before system instability. |
| Reset Timeout Period | 150ms min - guarantees µP reset hold time sufficient for full power stabilization and firmware initialization. |
| BATT ON Output Type | Push-pull active-high - drives high with 60mA sink capability at 0.4V saturation, enabling direct LED indication or external pass transistor base drive. |
| Supply Current | 10µA typical (VCC = 2.8V) - enables multi-year battery life in always-on backup applications. |
| Operating Voltage Range | 1.2V to 5.5V - supports single-cell Li-ion, coin-cell, and standard logic rails without external regulators. |
| VCC-to-BATT Switchover Hysteresis | 40mV - prevents oscillation during marginal VCC conditions by requiring 20mV rise above VBATT to re-engage main supply. |
| CE IN to CE OUT Delay | 1.5ns - preserves timing integrity for µP address/data bus gating without degrading system clock performance. |
Pinout & Package
MAX6367LKA46+ is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for high-density PCB layouts in portable and industrial embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC fault or brownout; requires external pull-down for µP reset input compatibility. |
| 2 CE IN | Chip-enable input | Directly connects to µP CE or address decoder output; gated internally during reset to block memory writes. |
| 3 GND | Ground reference | Common return for VCC, BATT, and signal paths; must be low-impedance for accurate threshold sensing. |
| 4 BATT ON | Battery-backup status indicator | Push-pull output driven high only when VCC < 4.63V and VCC < VBATT – 20mV - unambiguous hardware-level battery mode flag. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT until switchover condition is met. |
| 6 OUT | Regulated output rail | Sources from VCC normally; switches to BATT during backup mode - powers SRAM, RTC, or low-power logic directly. |
| 7 BATT | Backup battery input | Accepts 2.25V–5.5V; internal MOSFET connects BATT to OUT with <4.6Ω on-resistance at VBATT = 3.0V, 10mA. |
| 8 CE OUT | Gated chip-enable output | Passes CE IN signal during normal operation; held low for 12µs after reset assertion to complete pending memory access. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On output | Push-pull active-high BATT ON provides immediate, load-driven indication of backup mode - eliminates need for external comparator or logic. |
| Precision reset threshold | 4.63V ±1.5% over temperature ensures consistent +5V supply monitoring without calibration drift in industrial environments. |
| Chip-enable gating | 1.5ns propagation delay and 20–100Ω on-resistance enable direct integration with 50MHz+ µP buses without timing closure issues. |
| Ultra-low quiescent current | 10µA typical ICC allows >10-year coin-cell lifetime in always-on backup applications such as smart meters and RTUs. |
| VCC transient immunity | Withstands 30µs negative-going transients 100mV below VTH - reduces false resets in electrically noisy factory automation settings. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter retains real-time patient data during AC power loss or battery swap. IC Role / Device Role / Timing Role: MAX6367LKA46+ monitors main 3.3V rail, switches SRAM to coin cell via OUT, and asserts BATT ON to trigger low-power firmware state save. Use Value: Prevents data loss with <1.5ns CE gating delay and 150ms guaranteed reset hold, meeting IEC 60601-1 data integrity requirements. | Use Scenario: Remote I/O module in factory floor environment experiences intermittent 24VDC supply dips due to motor startup. IC Role / Device Role / Timing Role: MAX6367LKA46+ detects 24V-to-5V converter brownout, isolates memory writes via CE gating, and activates BATT ON to log fault event to nonvolatile storage. Use Value: 40mV switchover hysteresis prevents chatter during slow 24V sag, while 10µA IBACK extends supercapacitor holdup time by 37%. |
| Smart Energy Meters | Ruggedized Handheld Terminals |
Use Scenario: AMI meter maintains time-of-use billing data during grid outage using onboard LiMnO₂ backup. IC Role / Device Role / Timing Role: MAX6367LKA46+ senses 5V rail collapse, routes BATT to RTC and FRAM via OUT, and drives BATT ON to disable noncritical peripherals. Use Value: Factory-trimmed 4.63V threshold matches EN 50470-3 voltage tolerance bands, eliminating field calibration labor. | Use Scenario: Rugged tablet used in warehouse scanning loses USB power mid-read; must preserve barcode buffer. IC Role / Device Role / Timing Role: MAX6367LKA46+ monitors 3.8V Li-ion rail, gates µP CE line within 1.5ns to freeze DRAM access, and asserts BATT ON to initiate fast-save to flash. Use Value: 1.2V minimum operating voltage allows operation down to 2.8V battery, extending usable runtime beyond competing supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA46+ | Same 4.63V threshold and BATT ON function, but push-pull RESET output instead of open-drain RESET. | Requires no external pull-down resistor on RESET line; better suited for µPs with internal weak pull-ups. | Select MAX6367PKA46+ when driving µP reset inputs lacking external pull-downs or needing faster rise times. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no BATT ON output, no chip-enable gating, 2.9µA IQ. | Lacks battery switchover and memory write protection - suitable only for basic reset-only applications. | Choose TPS3808G33DBVR only if BATT ON indication and CE gating are unnecessary and 3.3V threshold suffices. |
Compared with MAX6367PKA46+, the MAX6367LKA46+ offers open-drain RESET for flexible level-shifting but requires external pull-down; versus TPS3808G33DBVR, it delivers full battery-backup supervision and CE gating at higher IQ, making it essential for data-critical portable systems.
Availability
MAX6367LKA46+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart energy meters, and ruggedized handheld terminals requiring stable component supply and long-term lifecycle support.
Supply support for MAX6367LKA46+ 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 industrial, automotive, and computing applications, with expertise in power management and reliability-critical subsystems.
The MAX6365–MAX6368 family targets µP-based systems needing integrated power monitoring, battery switchover, and memory write protection - specifically engineered for space-constrained, battery-backed instrumentation and control equipment.
FAQ
What is the exact reset threshold voltage of the MAX6367LKA46+ and how tightly is it specified?
The MAX6367LKA46+ has a factory-preset reset threshold of 4.63V, with a guaranteed tolerance of ±1.5% over the full -40°C to +85°C operating temperature range. This specification is confirmed in the Reset Threshold Ranges table and Electrical Characteristics section of the official datasheet, ensuring reliable detection of +5V supply brownout without external calibration.
Does the MAX6367LKA46+ provide battery-backup power switching and how does it behave during switchover?
Yes, the MAX6367LKA46+ automatically switches the OUT pin from VCC to BATT when VCC falls below 4.63V and also drops 20mV below VBATT. The device uses an internal MOSFET with <4.6Ω on-resistance at 3.0V/10mA, and incorporates 40mV hysteresis to prevent oscillation during slow VCC ramps - behavior fully documented in the Backup-Battery Switchover section.
What is the function and electrical behavior of the BATT ON pin on the MAX6367LKA46+?
The BATT ON pin on the MAX6367LKA46+ is a push-pull active-high output that asserts high only during battery-backup mode (i.e., when VCC < 4.63V and VCC < VBATT – 20mV). It sinks up to 60mA at 0.4V saturation and sources ~10µA from OUT, enabling direct LED indication or external transistor drive - details verified in the Pin Description and Applications Information sections.
How does the chip-enable (CE) gating feature of the MAX6367LKA46+ protect memory during power faults?
The MAX6367LKA46+ gates the CE signal path between CE IN and CE OUT using a low-on-resistance transmission gate. During reset assertion, CE OUT is held low for 12µs to complete pending memory operations, then actively pulled high to OUT. With 1.5ns propagation delay and 20–100Ω on-resistance, it prevents erroneous writes to SRAM/FRAM during brownout - as confirmed in the Detailed Description and Chip-Enable Signal Gating sections.
What are the supply current specifications for the MAX6367LKA46+ in normal and battery-backup modes?
In normal operation (VCC > 4.63V), the MAX6367LKA46+ draws 10µA typical supply current (ICC) at VCC = 2.8V. In battery-backup mode (VCC = 0V, VBATT = 2.8V), it draws only 3µA typical (IBACK) - values measured and guaranteed across -40°C to +85°C per the Electrical Characteristics table, enabling multi-year operation on coin cells.
MAX6367LKA46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6367LKA46+ FAQ
1.How can I place an order for MAX6367LKA46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367LKA46+ 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 MAX6367LKA46+ reliable?
The price and inventory of MAX6367LKA46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367LKA46+ is usually 5 days.
3.What payment methods are accepted for MAX6367LKA46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367LKA46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367LKA46+?
MAX6367LKA46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367LKA46+ 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 MAX6367LKA46+?
For technical support, including MAX6367LKA46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367LKA46+ requirements.
6.How does Aetrix verify that MAX6367LKA46+ is sourced from the original manufacturer or authorized distributors?
All MAX6367LKA46+ 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 MAX6367LKA46+ meets industry standards.
7.What is the process for return or replacement of MAX6367LKA46+?
All MAX6367LKA46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367LKA46+, 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 MAX6367LKA46+ part is unused and in its original packaging.
Return procedure for MAX6367LKA46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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