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Analog Devices Inc./Maxim Integrated MAX6367PKA23+T
- Part No.:
- MAX6367PKA23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367PKA23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
The MAX6367PKA23+T from Maxim Integrated is a battery-backup supervisory circuit with BATT ON indicator output, precision 2.32V reset threshold, open-drain active-low RESET, and chip-enable gating for CMOS RAM protection. It operates from 1.2V to 5.5V, delivers ≤10µA quiescent current, and supports automatic VCC-to-battery switchover during brownout in portable microprocessor systems.
For engineers reviewing the MAX6367PKA23+T datasheet, MAX6367PKA23+T pinout, MAX6367PKA23+T application, or MAX6367PKA23+T equivalent, key selection criteria include its guaranteed 2.32V reset threshold (±1.5% over temperature), 150ms minimum reset timeout, BATT ON push-pull high-indicator function, and 1.5ns CE propagation delay - all in an 8-pin SOT23 package.
Technical Context
The MAX6367PKA23+T integrates a precision voltage monitor, battery switchover MOSFET controller, chip-enable transmission gate, and BATT ON status output. Its reset generator asserts low when VCC falls below 2.32V (min), remains asserted for ≥150ms after recovery, and guarantees valid RESET down to 1.2V supply.
Battery switchover activates only when both VCC < VTH and VCC < VBATT − 20mV, with 40mV hysteresis to prevent chatter. The BATT ON output drives high in backup mode with 60mA sink capability at 0.4V saturation, enabling direct LED indication or external pass-transistor control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25V (min) to 2.38V (max); factory-trimmed 2.32V typical ensures reliable +2.5V rail monitoring with ±1.5% tolerance over -40°C to +85°C |
| Reset Timeout Period | 150ms (min); guarantees µP initialization completes before release, preventing premature code execution |
| Supply Current | 10µA (typ) at VCC = 5.5V; enables multi-year battery life in always-on backup applications |
| BATT ON Output | Push-pull high; sinks 60mA at 0.4V, supports direct LED drive or base biasing of external PNP pass transistors |
| VCC-to-OUT On-Resistance | 4.6Ω (max) at VCC = 2.38V, IOUT = 25mA; limits voltage drop and power loss during main-supply operation |
| CE Propagation Delay | 1.5ns (typ); preserves timing integrity for high-speed µP address/data bus gating without cycle penalty |
| Operating Voltage | 1.2V to 5.5V; supports single-cell Li-ion, coin-cell, and standard logic rails without external regulators |
Pinout & Package
Package: 8-pin SOT23 (2.9mm × 1.6mm × 1.1mm), lead(Pb)-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low during VCC brownout, manual reset, or watchdog timeout; requires external pull-up for system-level reset assertion |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low during normal operation, disabled during reset to block write corruption |
| 3 GND | Ground reference | Common return path for VCC, BATT, and all internal circuits; must be low-impedance for noise immunity |
| 4 BATT ON | Battery-backup status indicator | Push-pull high output in backup mode; sinks 60mA at 0.4V, usable for LED or external transistor control |
| 5 VCC | Main supply input | Powers device and supplies OUT during normal operation; monitored for reset generation and switchover control |
| 6 OUT | Power output to SRAM | Sources from VCC (≤150mA) or BATT (≤40mA) depending on switchover state; maintains memory retention during power loss |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V backup source; connects to OUT only when VCC < VTH and VCC < VBATT − 20mV |
| 8 CE OUT | 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 Indicator Output | Push-pull BATT ON provides unambiguous, high-drive status signal for backup mode - eliminates need for external comparator or logic |
| Guaranteed 1.2V Operation | RESET and internal logic remain fully functional down to 1.2V VCC or VBATT, enabling use with depleted batteries or ultra-low-voltage systems |
| 150ms Minimum Reset Timeout | Ensures µP clocks stabilize and internal registers clear before release - prevents boot failure in noisy or slow-ramping supplies |
| 1.5ns CE Propagation Delay | Preserves µP bus timing margins even at >100MHz clock rates, avoiding read/write errors during critical memory accesses |
| 40mV Switchover Hysteresis | Prevents oscillatory switching between VCC and BATT during slow VCC decay, eliminating memory corruption risk during marginal brownouts |
Applications
| Portable Medical Monitors | Industrial PLC Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter retains real-time sensor data during AC power loss or battery swap. IC Role / Device Role / Timing Role: MAX6367PKA23+T monitors main 3.3V rail, switches SRAM to coin-cell backup, and asserts BATT ON to trigger low-power firmware mode. Use Value: 10µA quiescent current extends coin-cell life beyond 5 years; 2.32V threshold precisely guards against 3.3V rail collapse before data loss. | Use Scenario: Factory-floor PLC stores last operational state and sensor history in nonvolatile SRAM during unexpected mains dropout. IC Role / Device Role / Timing Role: MAX6367PKA23+T gates CE to SRAM, holds reset until stable 5V rail recovery, and signals backup activation via BATT ON to control backup power sequencing. Use Value: 150ms reset timeout ensures full register save before shutdown; 4.6Ω VCC-to-OUT RON minimizes voltage sag under 100mA load. |
| Point-of-Sale Terminals | Set-Top Box Firmware Recovery |
Use Scenario: Retail terminal preserves transaction buffer and encryption keys during brief power flicker or battery depletion. IC Role / Device Role / Timing Role: MAX6367PKA23+T detects 2.5V logic rail undervoltage, disables SRAM writes via CE gating, and asserts BATT ON to initiate secure key backup routine. Use Value: 1.5ns CE delay prevents partial writes; 2.32V threshold aligns with 2.5V rail tolerance, avoiding false triggers from ripple. | Use Scenario: Cable box recovers from corrupted firmware by reloading bootloader from protected SRAM after brownout-induced crash. IC Role / Device Role / Timing Role: MAX6367PKA23+T holds µP in reset while SRAM content is verified, then releases reset only after BATT ON confirms stable backup power. Use Value: Guaranteed 1.2V operation ensures reset assertion even with weak 3V backup cell; open-drain RESET interfaces directly with common µP reset inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367HKA23+T | Same 2.32V reset threshold and BATT ON function, but features push-pull active-high RESET output instead of open-drain active-low | Requires redesign of reset pull-up network and may conflict with existing µP reset polarity requirements | Select only if system demands active-high reset assertion and no external level-shifting is feasible |
| TPS3808G125DBVR | Fixed 1.25V reset threshold, no BATT ON output, no chip-enable gating, 350ms reset timeout, 2.5µA quiescent current | Lacks battery switchover and memory write protection - suitable only for basic power monitoring without backup or CE control | Choose only for cost-sensitive, non-backup applications where 1.25V threshold suffices and CE gating is unnecessary |
Compared with MAX6367HKA23+T, the MAX6367PKA23+T offers compatible pinout and identical supervision logic but delivers industry-standard open-drain active-low RESET for universal µP interface. Against TPS3808G125DBVR, it adds critical battery switchover, CE gating, and BATT ON - making it uniquely suited for SRAM-retention-critical embedded systems.
Availability
MAX6367PKA23+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial data loggers, point-of-sale terminals, and set-top box firmware recovery systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6367PKA23+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 targets microprocessor-based systems needing integrated power supervision, battery backup, and memory write protection - delivering size, accuracy, and reliability improvements over discrete solutions.
FAQ
What is the exact reset threshold voltage of the MAX6367PKA23+T?
The MAX6367PKA23+T has a factory-trimmed reset threshold of 2.32V (typical), with a guaranteed range of 2.25V to 2.38V across -40°C to +85°C. This value is confirmed in the Reset Threshold Ranges table and Electrical Characteristics section of the official datasheet, and applies specifically to the "23" suffix variant.
Does the MAX6367PKA23+T provide chip-enable gating functionality?
Yes, the MAX6367PKA23+T includes dedicated chip-enable gating with CE IN and CE OUT pins. During reset assertion, it blocks CE transitions to prevent erroneous SRAM writes, with a 1.5ns propagation delay and 12µs hold time on CE OUT after reset deassertion - fully documented in the Pin Description and Detailed Description sections.
What is the purpose of the BATT ON pin on the MAX6367PKA23+T?
The BATT ON pin on the MAX6367PKA23+T is a push-pull output that drives high exclusively during battery-backup mode. It sinks up to 60mA at 0.4V saturation and is intended for driving LEDs or enabling external pass transistors - a feature unique to the MAX6367 variant and explicitly detailed in the Pin Description and Applications Information.
Can the MAX6367PKA23+T operate with a 1.2V supply voltage?
Yes, the MAX6367PKA23+T guarantees full functionality - including reset generation, BATT ON assertion, and CE gating - down to 1.2V on either VCC or VBATT. This is specified in the Absolute Maximum Ratings and Electrical Characteristics tables, and validated across temperature for the entire operating range.
What package type and dimensions does the MAX6367PKA23+T use?
The MAX6367PKA23+T uses an 8-pin SOT23 package measuring 2.9mm × 1.6mm × 1.1mm, with lead(Pb)-free construction indicated by the "+T" suffix. This package is confirmed in the Ordering Information table and Pin Configurations diagram, and matches all MAX6365–MAX6368 variants.
MAX6367PKA23+T 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:
- 2.32V
- Output:
- Open Drain or Open Collector
- 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
MAX6367PKA23+T FAQ
1.How can I place an order for MAX6367PKA23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367PKA23+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 MAX6367PKA23+T reliable?
The price and inventory of MAX6367PKA23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367PKA23+T is usually 5 days.
3.What payment methods are accepted for MAX6367PKA23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367PKA23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367PKA23+T?
MAX6367PKA23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367PKA23+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 MAX6367PKA23+T?
For technical support, including MAX6367PKA23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367PKA23+T requirements.
6.How does Aetrix verify that MAX6367PKA23+T is sourced from the original manufacturer or authorized distributors?
All MAX6367PKA23+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 MAX6367PKA23+T meets industry standards.
7.What is the process for return or replacement of MAX6367PKA23+T?
All MAX6367PKA23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367PKA23+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 MAX6367PKA23+T part is unused and in its original packaging.
Return procedure for MAX6367PKA23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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