My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6368PKA26-T
- Part No.:
- MAX6368PKA26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6368PKA26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,457
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6368PKA26-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 monitors VCC supply voltage (reset threshold = 2.63 V), asserts active-low open-drain RESET during power-up/down/brownout, switches OUT between VCC and backup battery (VBATT), and gates CE signals with 1.5 ns propagation delay. Used in portable equipment requiring reliable memory write protection during power failure.
For engineers reviewing the MAX6368PKA26-T datasheet, MAX6368PKA26-T pinout, MAX6368PKA26-T application, or MAX6368PKA26-T equivalent, key selection criteria include its 2.63 V factory-set reset threshold, 10 µA quiescent current, 150 ms minimum reset timeout, 1.235 V RESET IN comparator reference, and SOT23-8 package compatibility with space-constrained µP systems.
Technical Context
The MAX6368PKA26-T integrates a precision voltage monitor, battery switchover MOSFET, RESET IN comparator referenced to 1.235 V, and bidirectional chip-enable transmission gate. Its internal logic ensures CE OUT remains low for 12 µs after CE IN goes low during reset assertion, preventing SRAM corruption.
It operates across 1.2 V to 5.5 V VCC, guarantees RESET/RESET validity down to 1.2 V, and features 40 mV hysteresis on VCC-to-BATT switchover to prevent oscillation during slow VCC decay. The RESET IN input accepts external resistor-divider programming for secondary supply monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (factory preset, ±70 mV tolerance) - sets precise brownout detection point for +2.5 V systems |
| RESET Output Type | Open-drain active-low - enables wired-OR reset bus and flexible pull-up voltage selection |
| Quiescent Current | 10 µA at VCC = 5.5 V - minimizes standby power in battery-backed applications |
| RESET Timeout Period | 150 ms minimum - ensures µP completes full initialization before release |
| RESET IN Threshold | 1.235 V (±50 mV) - stable reference for external undervoltage detection of secondary supplies |
| Battery Switchover Hysteresis | 40 mV - prevents chattering during gradual VCC fall below VBATT |
| VCC Operating Range | 1.2 V to 5.5 V - supports wide-input industrial and portable designs without external regulators |
Pinout & Package
MAX6368PKA26-T is housed in an 8-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low continuously when VCC < 2.63 V, RESET IN < 1.235 V, or during brownout; requires external pull-up |
| 2 CE IN | Chip-enable input | Directly drives internal transmission gate; tied to GND or OUT if unused; enables CE signal blocking during reset |
| 3 GND | Ground reference | Primary return path for VCC, BATT, and all internal circuitry; must be low-impedance connection |
| 4 RESET IN | Auxiliary reset input | Comparator input referenced to 1.235 V; falling edge below threshold triggers reset; supports resistor-divider programming |
| 5 VCC | Main supply input | Power source for internal circuitry and primary output driver; monitored for reset generation and switchover control |
| 6 OUT | Regulated output | Sources from VCC normally; switches to BATT during brownout; delivers up to 150 mA (VCC) or 25 mA (BATT) |
| 7 BATT | Backup battery input | Provides hold-up power when VCC fails; must exceed VCC by ≥20 mV to engage switchover; draws <1 µA in standby |
| 8 CE OUT | Chip-enable output | Gated version of CE IN; held low for 12 µs after CE IN goes low during reset to complete memory access |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.63 V reset threshold | Enables direct compatibility with +2.5 V logic rails without external resistors or calibration |
| 1.235 V internal reference for RESET IN | Allows accurate, temperature-stable monitoring of secondary supplies (e.g., 5 V, 3.3 V) via two-resistor divider |
| 1.5 ns CE IN to CE OUT propagation delay | Supports high-speed µP and DSP interfaces without timing violation in normal operation |
| 10 µA max supply current at 5.5 V | Extends battery life in portable devices operating in long-duration backup mode |
| 40 mV VCC–VBATT switchover hysteresis | Eliminates false switching during slow power-rail decay, ensuring clean transition to backup power |
| Guaranteed RESET operation down to 1.2 V | Maintains supervisory function even as main supply collapses, critical for orderly shutdown sequences |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter retaining real-time clock and patient data during main supply interruption. IC Role / Device Role / Timing Role: Supervisory controller that switches SRAM power from VCC to backup battery and blocks CE signals to prevent corrupted memory writes. Use Value: Ensures zero data loss during 100+ ms brownouts using only 10 µA quiescent current and 2.63 V precision reset threshold. |
Use Scenario: Remote I/O node in factory automation losing 24 V DC input due to cable fault or power supply failure. IC Role / Device Role / Timing Role: Voltage monitor and battery switchover manager that maintains CAN bus communication and sensor polling during hold-up. Use Value: Delivers 150 ms guaranteed reset pulse and seamless VCC-to-BATT transition, preserving watchdog supervision and fieldbus uptime. |
| Point-of-Sale Terminals | Smart Energy Meters |
|
Use Scenario: Credit card terminal performing secure transaction logging when AC adapter disconnects unexpectedly. IC Role / Device Role / Timing Role: Memory write protector and reset generator that gates CE lines and asserts RESET to halt µP execution until power stabilizes. Use Value: Prevents partial EEPROM writes via 1.5 ns CE gating and 150 ms timeout-critical for PCI-DSS compliance and audit integrity. |
Use Scenario: Utility meter detecting grid outage and initiating secure flash storage of consumption data before backup capacitor depletes. IC Role / Device Role / Timing Role: Dual-supply supervisor using RESET IN to monitor auxiliary 3.3 V rail while managing main 5 V supply and backup lithium cell. Use Value: Combines 2.63 V VCC threshold and programmable 1.235 V RESET IN reference to independently verify both power domains before committing data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA26-T | Includes BATT ON push-pull indicator output instead of RESET IN; same 2.63 V threshold and SOT23-8 package | Used where visual/external indication of battery-backup mode is required, not secondary supply monitoring | Select MAX6367PKA26-T if BATT ON status signaling is needed; MAX6368PKA26-T is preferred for dual-rail voltage supervision |
| TPS3808G125DBVR | Fixed 1.25 V reset threshold, no battery switchover or CE gating; 1.8–6.0 V VCC range; SOT23-6 package | Applicable only for basic reset generation without backup power management or memory protection | Choose TPS3808G125DBVR for cost-sensitive, single-threshold applications without battery support; MAX6368PKA26-T adds critical switchover and gating |
Compared with MAX6367PKA26-T and TPS3808G125DBVR, the MAX6368PKA26-T uniquely combines factory-set 2.63 V monitoring, user-programmable RESET IN for secondary supplies, integrated battery switchover, and chip-enable gating-enabling robust data retention in complex embedded systems where multiple power domains must be supervised.
Availability
MAX6368PKA26-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and point-of-sale terminals requiring stable component supply and long-term lifecycle support.
Supply support for MAX6368PKA26-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 solutions with ultra-small SOT23 supervision.
FAQ
What is the factory-set reset threshold voltage for the MAX6368PKA26-T?
The MAX6368PKA26-T has a factory-trimmed reset threshold of 2.63 V (typical), with a specified range of 2.55 V to 2.70 V across temperature. This value is laser-trimmed during production and applies to VCC monitoring only; it is independent of the separate 1.235 V internal reference used by the RESET IN comparator. The threshold ensures reliable brownout detection for +2.5 V logic systems without external components.
How does the RESET IN pin function on the MAX6368PKA26-T?
The RESET IN pin on the MAX6368PKA26-T connects to an internal comparator referenced to a precise 1.235 V bandgap voltage. When the voltage at RESET IN falls below this threshold, the device asserts the active-low RESET output. It supports external resistor-divider programming to monitor secondary supplies (e.g., 5 V or 3.3 V rails), with leakage current limited to ±25 nA to preserve accuracy. The propagation delay from RESET IN falling edge to RESET assertion is 1.5 µs (typ).
What package type and dimensions does the MAX6368PKA26-T use?
The MAX6368PKA26-T uses an 8-pin SOT23 package measuring 2.9 mm × 1.6 mm × 1.1 mm (L × W × H). It is RoHS-compliant, lead(Pb)-free (denoted by "+T" suffix), and compatible with standard surface-mount reflow processes. Pin 1 is marked with a dot, and the top-side marking for this variant is "AACT". The compact footprint supports high-density PCB layouts in portable and industrial equipment.
Does the MAX6368PKA26-T support battery backup switchover, and what are the conditions?
Yes, the MAX6368PKA26-T supports automatic battery backup switchover. It engages when two conditions are met: (1) VCC falls below the 2.63 V reset threshold, and (2) VCC drops at least 20 mV below VBATT. A 40 mV hysteresis prevents oscillation during slow VCC decay. During switchover, OUT disconnects from VCC and connects to BATT, delivering up to 25 mA while drawing less than 1 µA from the battery in standby mode.
What is the purpose of the CE IN and CE OUT pins on the MAX6368PKA26-T?
The CE IN and CE OUT pins implement chip-enable signal gating to protect CMOS RAM during power faults. CE IN accepts the system's chip-enable signal; CE OUT delivers the gated version. When RESET is asserted, CE OUT is forced low for 12 µs (typ) after CE IN goes low-ensuring memory read/write completion-and then held high. Propagation delay is 1.5 ns under normal operation, supporting high-speed µP interfaces without timing violations.
MAX6368PKA26-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:
- 2.63V
- 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
MAX6368PKA26-T FAQ
1.How can I place an order for MAX6368PKA26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6368PKA26-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 MAX6368PKA26-T reliable?
The price and inventory of MAX6368PKA26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6368PKA26-T is usually 5 days.
3.What payment methods are accepted for MAX6368PKA26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6368PKA26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6368PKA26-T?
MAX6368PKA26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6368PKA26-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 MAX6368PKA26-T?
For technical support, including MAX6368PKA26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6368PKA26-T requirements.
6.How does Aetrix verify that MAX6368PKA26-T is sourced from the original manufacturer or authorized distributors?
All MAX6368PKA26-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 MAX6368PKA26-T meets industry standards.
7.What is the process for return or replacement of MAX6368PKA26-T?
All MAX6368PKA26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6368PKA26-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 MAX6368PKA26-T part is unused and in its original packaging.
Return procedure for MAX6368PKA26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6368PKA26-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…
