My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6368LKA46-T
- Part No.:
- MAX6368LKA46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6368LKA46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6368LKA46-T from Maxim Integrated is a low-power microprocessor supervisory circuit with auxiliary user-adjustable reset input, 4.63V factory-preset VCC reset threshold, open-drain active-high RESET output, and integrated chip-enable gating. It monitors +5.0V/+3.3V/+2.5V supplies, provides battery-backup switchover (VCC to BATT), and protects CMOS RAM during brownout in portable industrial controllers.
For engineers reviewing the MAX6368LKA46-T datasheet, MAX6368LKA46-T pinout, MAX6368LKA46-T application, or MAX6368LKA46-T equivalent, key selection criteria include its 1.235V RESET IN comparator threshold, 150ms minimum reset timeout, 10µA quiescent current, and SOT23-8 package compatibility with space-constrained µP systems requiring secondary supply monitoring.
Technical Context
The MAX6368LKA46-T implements a precision voltage-monitoring architecture with dual-threshold supervision: primary VCC reset at 4.63V (±130mV) and secondary RESET IN comparator referenced to 1.235V (±50mV). Its internal MOSFET-based power-path switch enables seamless VCC/BATT switchover with 40mV hysteresis and <4.6Ω on-resistance at 2.38V VCC.
Chip-enable gating uses a transmission gate with 1.5ns propagation delay and 20–100Ω on-resistance, asserting CE OUT low only when CE IN is low and reset is deasserted. The RESET IN input features ±25nA leakage and 1.5µs propagation delay to reset assertion, supporting external resistor-divider programming of secondary supply thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V (factory preset, ±130mV over -40°C to +85°C) - ensures reliable reset assertion for +5.0V systems under brownout |
| RESET IN Threshold | 1.235V (±50mV) - enables precise secondary supply monitoring via external resistor divider |
| Quiescent Current | 10µA (max at VCC = 5.5V) - supports multi-year battery life in backup mode |
| Reset Timeout Period | 150ms (min) - guarantees µP initialization stability after power recovery |
| Supply Range | 1.2V to 5.5V - operates directly from low-voltage rails without external regulators |
| CE IN to CE OUT Delay | 1.5ns (typical) - preserves timing integrity for high-speed µP address/data buses |
| Battery-Backup On-Resistance | 4.6Ω (at VBATT = 2.25V, IOUT = 5mA) - minimizes voltage drop during SRAM retention |
Pinout & Package
MAX6368LKA46-T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for PCB area-constrained applications. Pin 1 is RESET (active-high open-drain), Pin 2 is CE IN, Pin 3 is GND, Pin 4 is RESET IN, Pin 5 is VCC, Pin 6 is OUT, Pin 7 is BATT, and Pin 8 is CE OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high open-drain reset output | Pulls high only when externally pulled up; asserts high during VCC brownout, RESET IN undervoltage, or reset timeout period |
| 2 - CE IN | Chip-enable input | Directly gates CE signal path to CMOS RAM; low state enables CE OUT only when reset is deasserted |
| 3 - GND | Ground reference | Common return for VCC, BATT, and signal paths; must be low-impedance for accurate threshold sensing |
| 4 - RESET IN | Auxiliary reset input | Compares against 1.235V internal reference; falling edge below threshold triggers reset within 1.5µs |
| 5 - VCC | Main supply input | Primary power source (1.2V–5.5V); monitored for 4.63V reset threshold; powers internal circuitry and OUT during normal operation |
| 6 - OUT | Power output | Sources from VCC normally; switches to BATT during brownout; delivers up to 150mA to SRAM |
| 7 - BATT | Backup battery input | Provides retention power when VCC < VTH and VCC < VBATT; requires ≥20mV above VCC for switchover |
| 8 - CE OUT | Chip-enable output | Passes CE IN signal only when reset is deasserted and CE IN is high; held low for 12µs if CE IN is low during reset assertion |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Secondary Reset | 1.235V internal reference enables precise undervoltage detection of auxiliary supplies (e.g., 4.60V logic rail) using external resistors |
| Low-Power Battery Backup | 3µA max battery standby current (VBATT = 2.8V, VCC = 0V) extends backup runtime in portable equipment |
| VCC/BATT Switchover Hysteresis | 40mV hysteresis prevents oscillation during slow VCC transitions near switchover point |
| Chip-Enable Propagation Delay | 1.5ns typical delay ensures compatibility with high-speed µP address/data timing requirements |
| Transient Immunity | Withstands 30µs negative-going VCC transients down to 100mV below reset threshold without false triggering |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Continuous patient vital sign logging during AC power interruption. IC Role / Device Role / Timing Role: Supervises main 5V supply and secondary 3.3V analog sensor rail; asserts RESET when either falls below threshold. Use Value: Prevents corrupted ECG waveform storage by disabling SRAM writes during brownout via CE gating. | Use Scenario: Maintaining real-time control loop execution during factory floor power dips. IC Role / Device Role / Timing Role: Monitors 24V-to-5V DC/DC output and 3.3V FPGA core supply; triggers system reset before logic errors occur. Use Value: Guarantees 150ms reset hold time for deterministic µP restart, eliminating watchdog-induced spurious trips. |
| Smart Energy Meters | Ruggedized Handheld Terminals |
Use Scenario: Preserving tariff data and clock accuracy during utility grid fluctuations. IC Role / Device Role / Timing Role: Switches SRAM power from main supply to coin-cell battery; monitors backup voltage integrity via RESET IN. Use Value: Achieves <1µA battery drain in backup mode, enabling >10-year meter lifetime without maintenance. | Use Scenario: Enabling field technicians to operate devices continuously during battery swaps. IC Role / Device Role / Timing Role: Provides seamless VCC/BATT switchover with 40mV hysteresis to prevent display flicker or memory loss. Use Value: Eliminates need for external diode-OR circuits, reducing BOM count and PCB footprint by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6368PKA46-T | Same 4.63V VCC threshold and RESET IN function, but push-pull active-low RESET output instead of open-drain active-high | Requires pull-up resistor removal and µP reset pin reconfiguration for active-low logic | Select when system design mandates active-low reset signaling and no external pull-up is desired |
| TPS3808G33DBVR | 3.3V fixed VCC threshold, no RESET IN input, 300ms reset timeout, 2.5µA quiescent current | Lacks secondary supply monitoring capability and battery switchover; suited for single-rail systems only | Choose for cost-sensitive applications where only primary 3.3V monitoring is required and backup power is not used |
Compared with MAX6368LKA46-T, MAX6368PKA46-T offers identical supervision functionality but different reset polarity and drive strength, while TPS3808G33DBVR provides lower quiescent current at the expense of missing battery backup, chip-enable gating, and programmable secondary reset-making it unsuitable for dual-supply or memory-retention-critical designs.
Availability
MAX6368LKA46-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, smart energy meters, and ruggedized handheld terminals requiring stable component supply and long-term lifecycle support.
Supply support for MAX6368LKA46-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 space-constrained microprocessor systems needing integrated power monitoring, battery backup, and memory write protection-replacing discrete supervisor + switch + gating solutions with a single 8-pin SOT23 device.
FAQ
What is the exact reset threshold voltage for MAX6368LKA46-T?
The MAX6368LKA46-T has a factory-preset VCC reset threshold of 4.63V (minimum 4.50V, maximum 4.75V) across -40°C to +85°C. This value is laser-trimmed during production and specified in the Reset Threshold Ranges table. The secondary RESET IN threshold remains fixed at 1.235V (±50mV) regardless of the VCC suffix code. Both thresholds are guaranteed over temperature and supply voltage variations.
How does the RESET IN pin function on MAX6368LKA46-T?
The RESET IN pin on MAX6368LKA46-T compares an external voltage against an internal 1.235V reference. When the voltage at RESET IN falls below 1.235V, the device asserts the RESET output within 1.5µs. This allows monitoring of secondary supplies (e.g., 3.3V or 2.5V rails) using a simple resistor divider. The input draws only ±25nA, enabling high-impedance divider networks without accuracy loss.
What package type and dimensions does MAX6368LKA46-T use?
MAX6368LKA46-T uses an 8-pin SOT23 package measuring 2.9mm × 1.6mm × 1.1mm with standard lead pitch of 0.65mm. It is RoHS-compliant and available in lead(Pb)-free form (ordered as MAX6368LKA46+T). The package supports reflow soldering at peak temperatures up to +260°C for lead-free assembly and +240°C for leaded versions.
Can MAX6368LKA46-T operate without a backup battery connected?
Yes, MAX6368LKA46-T functions without a backup battery. In this configuration, connect the BATT pin to GND and tie OUT directly to VCC. The device continues to monitor VCC for reset conditions and provide chip-enable gating. All supervision features-including RESET IN monitoring and reset timeout-remain fully operational. Battery switchover circuitry is simply disabled.
What is the maximum load current supported by the OUT pin of MAX6368LKA46-T?
The OUT pin of MAX6368LKA46-T delivers up to 150mA when powered from VCC (at VCC = 4.75V) and up to 25mA when powered from BATT (at VBATT = 2.25V, IOUT = 5mA). The on-resistance varies with supply voltage and temperature: 4.6Ω at 2.38V VCC, 3.7Ω at 3.15V, and 3.1Ω at 4.75V. Exceeding these limits risks thermal shutdown or degraded regulation.
MAX6368LKA46-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:
- 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
MAX6368LKA46-T FAQ
1.How can I place an order for MAX6368LKA46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6368LKA46-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 MAX6368LKA46-T reliable?
The price and inventory of MAX6368LKA46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6368LKA46-T is usually 5 days.
3.What payment methods are accepted for MAX6368LKA46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6368LKA46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6368LKA46-T?
MAX6368LKA46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6368LKA46-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 MAX6368LKA46-T?
For technical support, including MAX6368LKA46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6368LKA46-T requirements.
6.How does Aetrix verify that MAX6368LKA46-T is sourced from the original manufacturer or authorized distributors?
All MAX6368LKA46-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 MAX6368LKA46-T meets industry standards.
7.What is the process for return or replacement of MAX6368LKA46-T?
All MAX6368LKA46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6368LKA46-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 MAX6368LKA46-T part is unused and in its original packaging.
Return procedure for MAX6368LKA46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6368LKA46-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…
