My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6368PKA31-T
- Part No.:
- MAX6368PKA31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6368PKA31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,313
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6368PKA31-T from Maxim Integrated is a low-power microprocessor supervisory circuit with auxiliary user-adjustable reset input, battery backup switchover, and chip-enable gating. It operates from 1.2V to 5.5V, features a factory-preset 3.08V reset threshold (±70mV), 150ms minimum reset timeout, 10µA quiescent current, and supports CMOS RAM protection in portable industrial controllers and POS equipment.
For engineers reviewing the MAX6368PKA31-T datasheet, MAX6368PKA31-T pinout, MAX6368PKA31-T application, or MAX6368PKA31-T equivalent, key selection criteria include its 1.235V RESET IN comparator threshold, open-drain active-low RESET output, SOT23-8 package compatibility, and guaranteed reset assertion down to 1.2V VCC/VBATT.
Technical Context
The MAX6368PKA31-T integrates a precision voltage monitor for main supply (VCC) and an independent 1.235V reference comparator for external RESET IN, enabling dual-supply fault detection. Its internal MOSFET-based VCC/BATT switchover ensures seamless transition to backup power when VCC falls below both the 3.08V threshold and VBATT by ≥20mV.
Chip-enable gating uses a transmission gate with 1.5ns propagation delay and <100Ω on-resistance, actively disabling CE OUT during reset to prevent SRAM corruption. The device asserts RESET low continuously during VCC brownout or RESET IN undervoltage, holding for ≥150ms after recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±70mV - sets precise power-fail detection point for +3.3V systems |
| RESET IN Threshold | 1.235V ±50mV - enables secondary supply monitoring via external resistor divider |
| Quiescent Current | 10µA max at VCC = 5.5V - minimizes battery drain in always-on backup mode |
| Reset Timeout | 150ms min - ensures µP completes full initialization before release |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and single-cell Li-ion backup |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level translation |
| Package | 8-pin SOT23 - 2.9mm × 1.6mm footprint for space-constrained embedded designs |
Pinout & Package
MAX6368PKA31-T is housed in an 8-pin SOT23 package with standard pinout and thermal pad omitted. Pin functions are validated per Maxim's official datasheet revision 5 (10/11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low during VCC brownout, RESET IN undervoltage, or watchdog timeout; requires external pullup |
| 2 CE IN | Chip-enable input | Directly gates CE signal path; low disables CE OUT during reset to block memory writes |
| 3 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance connection |
| 4 RESET IN | Auxiliary reset input | Compares to 1.235V reference; falling edge below threshold triggers reset assertion |
| 5 VCC | Main supply input | Powers device and sources OUT during normal operation; monitored for 3.08V threshold violation |
| 6 OUT | Power output | Switches between VCC and BATT based on voltage comparison; delivers up to 150mA |
| 7 BATT | Backup battery input | Supplies OUT when VCC < VTH and VCC < VBATT − 20mV; draws <1µA standby current |
| 8 CE OUT | Chip-enable output | Passes CE IN signal only when reset inactive; held low for 12µs if CE IN low during reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Auxiliary RESET IN comparator | 1.235V internal reference enables programmable secondary supply monitoring with ±50mV accuracy |
| Battery switchover control | Automatic VCC/BATT switching with 40mV hysteresis prevents oscillation during slow VCC decay |
| Chip-enable gating | 1.5ns propagation delay and <100Ω on-resistance ensure compatibility with high-speed µPs and DSPs |
| Low-voltage operation | Guaranteed RESET/RESET functionality down to 1.2V VCC or VBATT supports single-cell battery systems |
| Transient immunity | Withstands 30µs negative VCC transients 100mV below threshold without spurious reset assertion |
Applications
| Industrial Controller Power Management | POS Terminal Battery Backup |
|---|---|
Use Scenario: Maintaining real-time clock and configuration memory during AC power loss in factory automation PLCs. IC Role / Device Role / Timing Role: Supervisory circuit providing VCC brownout detection, automatic BATT switchover, and CE gating to preserve SRAM integrity. Use Value: Prevents data corruption during 150ms+ power interruptions using <1µA battery standby current and 1.235V secondary supply monitoring. | Use Scenario: Ensuring transaction log persistence in retail point-of-sale terminals during unexpected mains failure. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset on main 5V rail collapse while monitoring 3.3V logic rail via RESET IN. Use Value: Guarantees µP reset and SRAM write-protection within 20µs of VCC drop, with 3.08V threshold optimized for +3.3V system margin. |
| Portable Medical Device Monitoring | Set-Top Box Firmware Protection |
Use Scenario: Safeguarding calibration data and patient history in handheld diagnostic tools powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >1-year shelf life in backup mode while supporting 1.2V–5.5V operating range. Use Value: Delivers 10µA ICC and <1µA IBATT to extend battery life, with open-drain RESET compatible with mixed-voltage I/O domains. | Use Scenario: Preventing firmware corruption during power cycling or brownout events in consumer entertainment devices. IC Role / Device Role / Timing Role: Chip-enable gate blocking flash memory writes during unstable power conditions, synchronized to RESET timing. Use Value: Eliminates erroneous writes using 1.5ns CE propagation delay and 12µs hold time on CE OUT during reset assertion. |
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 | Includes BATT ON push-pull indicator output instead of RESET IN; same 3.08V VCC threshold and SOT23-8 package | Used where visual/external battery-backup status signaling is required, not secondary supply monitoring | Select MAX6367PKA31-T when BATT ON output is needed for LED indication or external pass transistor control |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no RESET IN input, 350ms reset timeout, 1.8V–6.5V VCC range, SOT23-6 package | Lacks auxiliary reset input and battery switchover; suited for simpler reset-only applications without backup power | Choose TPS3808G33DBVR for cost-sensitive designs requiring only primary supply monitoring and no battery management |
Compared with MAX6367PKA31-T, MAX6368PKA31-T provides programmable secondary supply monitoring but omits BATT ON indication; versus TPS3808G33DBVR, it offers battery switchover and lower quiescent current but requires board-level resistor programming for RESET IN thresholds.
Availability
MAX6368PKA31-T is available at Aetrix Electronics and suitable for industrial controller power management, POS terminal battery backup, and portable medical device monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX6368PKA31-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 interface applications in industrial, computing, and communications systems.
The MAX6365–MAX6368 family delivers ultra-low-power supervisory functions with integrated battery switchover and chip-enable gating, targeting space-constrained µP systems requiring robust power-fail response and data retention.
FAQ
What is the factory-preset reset threshold voltage for MAX6368PKA31-T?
The MAX6368PKA31-T has a factory-preset VCC reset threshold of 3.08V, with a tolerance of ±70mV over temperature. This value is specified in the Reset Threshold Ranges table and corresponds to the "31" suffix in the part number. The threshold is laser-trimmed during production and does not require external components for primary supply monitoring.
How does the RESET IN function work on MAX6368PKA31-T?
The RESET IN pin on MAX6368PKA31-T compares an external voltage to an internal 1.235V reference. When the voltage at RESET IN falls below 1.235V ±50mV, the device asserts the open-drain RESET output low. This allows monitoring of secondary supplies (e.g., 5V or 2.5V rails) using a simple resistor divider, with propagation delay under 1.5µs.
What is the maximum load current supported by the OUT pin of MAX6368PKA31-T?
The OUT pin of MAX6368PKA31-T delivers up to 150mA when sourced from VCC (at VCC = 4.75V), and up to 20mA when sourced from BATT (at VBATT = 3.0V). The on-resistance varies with voltage and temperature - e.g., 4.6Ω typical at VCC = 2.38V and IOUT = 25mA - and is characterized across the full -40°C to +85°C range.
Does MAX6368PKA31-T support operation with a single-cell lithium battery as VBATT?
Yes, MAX6368PKA31-T supports VBATT down to 0V and operates with single-cell Li-ion (2.7V–4.2V) or LiFePO₄ (2.0V–3.6V) batteries. Its 1.2V minimum operating voltage, <1µA battery standby current, and 40mV switchover hysteresis ensure reliable backup mode entry/exit across the full battery discharge curve without oscillation.
What package type and pin count does MAX6368PKA31-T use?
MAX6368PKA31-T uses an 8-pin SOT23 package (2.9mm × 1.6mm footprint) with standard pinout matching other MAX6365–MAX6368 variants. The package is lead(Pb)-free, tape-and-reel formatted (2500-piece reels), and marked "AACR" per Maxim's Device Marking Codes table.
MAX6368PKA31-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6368PKA31-T FAQ
1.How can I place an order for MAX6368PKA31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6368PKA31-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 MAX6368PKA31-T reliable?
The price and inventory of MAX6368PKA31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6368PKA31-T is usually 5 days.
3.What payment methods are accepted for MAX6368PKA31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6368PKA31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6368PKA31-T?
MAX6368PKA31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6368PKA31-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 MAX6368PKA31-T?
For technical support, including MAX6368PKA31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6368PKA31-T requirements.
6.How does Aetrix verify that MAX6368PKA31-T is sourced from the original manufacturer or authorized distributors?
All MAX6368PKA31-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 MAX6368PKA31-T meets industry standards.
7.What is the process for return or replacement of MAX6368PKA31-T?
All MAX6368PKA31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6368PKA31-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 MAX6368PKA31-T part is unused and in its original packaging.
Return procedure for MAX6368PKA31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6368PKA31-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
