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Analog Devices Inc./Maxim Integrated MAX6367PKA29+T
- Part No.:
- MAX6367PKA29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367PKA29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,878
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Product details
Overview
MAX6367PKA29+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 active-high open-drain RESET when VCC falls below 2.93V (typ), switches OUT to backup battery during brownout, and drives BATT ON high in backup mode. Used in portable POS terminals, industrial controllers, and set-top boxes requiring reliable power-fail response.
For engineers reviewing the MAX6367PKA29+T datasheet, MAX6367PKA29+T pinout, MAX6367PKA29+T application, or MAX6367PKA29+T equivalent, key selection criteria include reset threshold accuracy (±0.07V over temp), guaranteed 150ms reset timeout, 10µA quiescent current, BATT ON push-pull drive capability, and SOT23-8 package compatibility with space-constrained µP systems.
Technical Context
The MAX6367PKA29+T implements a precision voltage comparator with 2.93V factory-trimmed reset threshold (2.85V–3.00V range), integrated MOSFET-based VCC/BATT switchover logic with 40mV hysteresis, and dedicated push-pull BATT ON output that sources ~10µA from OUT in backup mode. Its CE IN/CE OUT transmission gate provides 1.5ns propagation delay and 20–100Ω on-resistance for SRAM write protection.
Unlike MAX6365 (MR input) or MAX6366 (watchdog), the MAX6367PKA29+T integrates a dedicated BATT ON signal-asserted high only when VCC < VTH and VCC < VBATT-enabling direct status indication without external logic. The device operates down to 1.2V on either VCC or VBATT and guarantees RESET/RESET validity across full supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ), 2.85V–3.00V min/max - ensures reliable detection of +3.3V rail brownout before data corruption |
| Reset Timeout Period | 150ms (min), 280ms (max) - meets JEDEC JESD74A minimum reset hold time for most µPs |
| Quiescent Current | 10µA (typ) at VCC = 5.5V - enables multi-year battery life in always-on backup applications |
| BATT ON Output | Push-pull, sinks 60mA at 5V VCC - directly drives LEDs or base of external pass transistor without buffer |
| VCC-to-OUT On-Resistance | 4.6Ω (typ) at VCC = 2.38V, IOUT = 25mA - limits dropout to <115mV at 25mA, preserving SRAM VCC margin |
| Operating Voltage Range | 1.2V–5.5V on VCC or VBATT - supports single-cell Li-ion (3.0V), coin-cell (2.2–3.0V), and main rails |
| Package | 8-pin SOT23 - footprint compatible with industry-standard 2.9mm × 1.6mm PCB area constraints |
Pinout & Package
MAX6367PKA29+T uses an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm height) with gull-wing leads, RoHS-compliant lead(Pb)-free finish (+T suffix), and thermal pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Pulled high externally; asserts high during VCC brownout, MR low, or watchdog timeout; requires pull-up for µP reset input |
| 2 CE IN | Chip-enable input | Connected to µP CE line; gates CE OUT during reset to prevent SRAM write errors during power failure |
| 3 GND | Ground reference | Primary return path for VCC, BATT, and all internal circuits; must be low-impedance connection to system ground plane |
| 4 BATT ON | Battery-backup status indicator | Push-pull output driven high only when VCC < VTH and VCC < VBATT; sinks 60mA to drive LED or transistor base |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation; reset triggers when falling below 2.93V |
| 6 OUT | Regulated output | Sources from VCC normally; switches to BATT during brownout; delivers up to 150mA with <4.6Ω on-resistance |
| 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 | Passes CE IN signal during normal operation; held low for 12µs after reset assertion to complete ongoing memory access |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On output indicator | Dedicated push-pull BATT ON pin eliminates need for external comparator or logic to signal backup mode entry |
| Chip-enable gating with 1.5ns delay | Prevents SRAM write corruption during power failure by blocking CE transitions within 1.5ns of fault detection |
| 10µA supply current | Enables >10-year coin-cell lifetime in backup mode (VBATT = 2.8V, IBACK = 3µA typ) |
| VCC/BATT switchover with 40mV hysteresis | Prevents oscillation during slow VCC decay by requiring 40mV recovery before switching back from battery |
| Guaranteed 1.2V operation | Supports ultra-low-voltage µPs and real-time clocks that operate down to 1.2V without external level-shifting |
Applications
| POS Terminal Power Management | Industrial PLC Controller Backup |
|---|---|
|
Use Scenario: Battery-backed memory retention during AC mains interruption in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC providing VCC brownout detection, automatic BATT switchover to SRAM, and BATT ON status flag for firmware logging. Use Value: Prevents transaction data loss by maintaining CMOS RAM power and signaling backup activation via BATT ON to host controller within 20µs of VCC drop. |
Use Scenario: Maintaining configuration and runtime state in programmable logic controllers during factory power dips. IC Role / Device Role / Timing Role: System supervisor asserting RESET to halt CPU execution and enabling CE gating to freeze memory writes during voltage sag. Use Value: Guarantees 150ms minimum reset hold time and blocks erroneous writes to flash/EEPROM using sub-2ns CE propagation delay. |
| Set-Top Box Real-Time Clock Hold | Portable Medical Monitor Data Retention |
|
Use Scenario: Preserving RTC time and channel settings during brief power outages in digital cable receivers. IC Role / Device Role / Timing Role: Dual-rail supervisor monitoring both +3.3V main and +1.8V RTC supply, with BATT ON driving RTC backup enable. Use Value: Delivers <1µA battery standby current and 2.93V threshold matched to +3.3V rail tolerance, extending CR2032 life beyond 5 years. |
Use Scenario: Securing patient vital sign logs during battery swap in handheld ECG monitors. IC Role / Device Role / Timing Role: Low-power supervisor with 1.2V operation supporting single-cell LiFePO₄ (2.5–3.6V) and coin-cell backup. Use Value: Enables seamless switchover at 2.93V threshold with <4.6Ω VCC-to-OUT resistance, limiting voltage drop to <75mV at 16mA SRAM load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367HKA29+T | Same functionality and pinout; higher temperature grade (-40°C to +125°C vs. +85°C) | Required for under-hood automotive or industrial environments exceeding 85°C ambient | Select when extended temperature operation is mandatory; otherwise MAX6367PKA29+T suffices for commercial/industrial use |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no BATT ON output, no chip-enable gating, 1.8µA IQ | Lacks battery switchover and SRAM write protection; suitable only for basic reset-only applications | Choose only if BATT ON and CE gating are unnecessary and ultra-low IQ (<2µA) is prioritized over feature set |
Compared with MAX6367HKA29+T, the MAX6367PKA29+T offers identical core supervision but lower cost and standard temperature range; versus TPS3808G33DBVR, it delivers critical battery-backup and memory protection features absent in the TI part, justifying its use where data integrity during power loss is non-negotiable.
Availability
MAX6367PKA29+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLCs, retail POS terminals, and set-top boxes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6367PKA29+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, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.
The MAX6365–MAX6368 family targets µP-based systems needing integrated power monitoring, battery backup, and memory write protection in minimal footprint-specifically addressing reliability gaps in portable and mission-critical embedded equipment.
FAQ
What is the exact reset threshold voltage for MAX6367PKA29+T?
The MAX6367PKA29+T has a factory-trimmed reset threshold of 2.93V (typical), with guaranteed minimum of 2.85V and maximum of 3.00V across -40°C to +85°C. This value is laser-trimmed during production and applies specifically to the "29" suffix variant, matching the +3.3V supply rail's 5% tolerance band for robust brownout detection.
Does MAX6367PKA29+T support battery switchover with a 2.5V backup source?
Yes, MAX6367PKA29+T supports VBATT as low as 0V and operates down to 1.2V on either supply rail. With VBATT = 2.5V, switchover activates when VCC falls below 2.93V and drops below VBATT − 20mV (i.e., <2.48V), ensuring clean transition while maintaining sufficient headroom for SRAM operation.
How does the BATT ON output behave during VCC power-up?
The BATT ON output of MAX6367PKA29+T remains low during VCC power-up until VCC rises above the 2.93V reset threshold and stabilizes. It only goes high when both conditions are met: VCC < VTH and VCC < VBATT - meaning BATT ON is never asserted during nominal startup, preventing false backup-mode indications.
Can MAX6367PKA29+T be used without a backup battery?
Yes, MAX6367PKA29+T functions as a standard supervisory circuit without backup battery: connect BATT to GND and OUT to VCC. RESET and BATT ON remain fully operational; BATT ON stays low, and chip-enable gating continues protecting memory during VCC faults - no redesign required for non-battery applications.
What is the maximum load current supported by the OUT pin of MAX6367PKA29+T?
The OUT pin of MAX6367PKA29+T delivers up to 150mA from VCC (at VCC = 4.75V) and up to 20mA from BATT (at VBATT = 3.0V). Its VCC-to-OUT on-resistance is 4.6Ω (typ) at 2.38V, resulting in <115mV dropout at 25mA - sufficient for powering small SRAMs, RTCs, or µP backup domains without external regulation.
MAX6367PKA29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6367PKA29+T FAQ
1.How can I place an order for MAX6367PKA29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367PKA29+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 MAX6367PKA29+T reliable?
The price and inventory of MAX6367PKA29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367PKA29+T is usually 5 days.
3.What payment methods are accepted for MAX6367PKA29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367PKA29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367PKA29+T?
MAX6367PKA29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367PKA29+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 MAX6367PKA29+T?
For technical support, including MAX6367PKA29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367PKA29+T requirements.
6.How does Aetrix verify that MAX6367PKA29+T is sourced from the original manufacturer or authorized distributors?
All MAX6367PKA29+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 MAX6367PKA29+T meets industry standards.
7.What is the process for return or replacement of MAX6367PKA29+T?
All MAX6367PKA29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367PKA29+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 MAX6367PKA29+T part is unused and in its original packaging.
Return procedure for MAX6367PKA29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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