Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6368HKA46+T

Name: MAX6368HKA46+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6368HKA46+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MAX6368HKA46+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SOT-23-8

Datasheet:: MAX6368HKA46+T.pdf

Description:: IC SUPERVISOR MPU LP SOT23-8

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:15,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MAX6368HKA46+T from Maxim Integrated is a low-power microprocessor supervisory circuit with auxiliary user-adjustable reset input, 4.63V factory-preset V_CC reset threshold, open-drain active-high RESET output, and integrated chip-enable gating for CMOS RAM protection. It operates from 1.2V to 5.5V, delivers <10µA quiescent current, and supports battery-backup switchover in portable industrial controllers requiring reliable brownout detection and memory write protection.

For engineers reviewing the MAX6368HKA46+T datasheet, MAX6368HKA46+T pinout, MAX6368HKA46+T application, or MAX6368HKA46+T equivalent, key selection criteria include its 1.235V RESET IN comparator threshold, 150ms minimum reset timeout, VCC-to-OUT on-resistance of 4.6Ω at 2.38V, CE IN to CE OUT propagation delay of 2ns (typ), and guaranteed RESET/RESET validity down to 1.2V supply.

Technical Context

The MAX6368HKA46+T implements a precision voltage-monitoring architecture with dual-threshold supervision: factory-trimmed 4.63V V_CC reset detection and an independent 1.235V internal reference for the RESET IN comparator. Its battery-switchover logic enforces strict hysteresis-requiring V_CC to fall 20mV below V_BATT before switching-and guarantees V_OUT sourcing from either V_CC or the greater of V_CC/V_BATT.

Chip-enable gating uses a series transmission gate with 20–100Ω on-resistance (reset not asserted) and 12µs reset-to-CE OUT delay when CE IN is low during reset assertion. The 1.5ns CE propagation delay and 1µA CE IN leakage ensure compatibility with high-speed µP address/data buses while preventing spurious writes during power faults.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Reset Threshold	4.63V (factory preset, ±0.13V over temp); ensures reliable reset assertion before 5V system brownout.
RESET IN Threshold	1.235V (±50mV); enables precise secondary supply monitoring via external resistor divider.
Quiescent Supply Current	10µA max (V_CC > V_TH); supports ultra-low-power operation in battery-backed systems.
Reset Timeout Period	150ms min; provides sufficient hold time for µP initialization after V_CC recovery.
V_CC-to-OUT On-Resistance	4.6Ω at V_CC = 2.38V, I_OUT = 25mA; limits voltage drop under 65mA load at 3.15V.
CE IN to CE OUT Delay	2ns typ (50Ω source, 50pF load); preserves timing integrity for fast µP CE signals.
Operating Voltage Range	1.2V to 5.5V (V_CC or V_BATT); supports single-cell Li-ion and multi-rail embedded systems.

Pinout & Package

MAX6368HKA46+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in portable equipment. Pin numbering follows standard SOT23 top-view orientation with pin 1 marked by a dot.

Pin/Terminal	Circuit Role	Design Meaning
1	RESET	Open-drain active-high reset output; requires external pull-up; asserts high during V_CC undervoltage or RESET IN fault.
2	CE IN	Chip-enable input; connected to µP CE signal; gated internally to prevent RAM corruption during reset.
3	GND	Ground reference for all analog and digital functions; must be low-impedance connection.
4	RESET IN	Adjustable reset input; compared to 1.235V reference; used for secondary supply monitoring.
5	V_CC	Main supply input (1.2V–5.5V); powers device and sources OUT during normal operation.
6	OUT	Output rail; sourced from V_CC or V_BATT (whichever is higher) during backup mode; drives SRAM V_CC.
7	BATT	Backup battery input; enables automatic switchover when V_CC falls 20mV below V_BATT.
8	CE OUT	Chip-enable output; passes CE IN signal only when reset is deasserted; actively pulled up to OUT.

Key Features

Feature	Design Value
Auxiliary RESET IN comparator	1.235V internal reference enables programmable secondary supply monitoring with <25nA input leakage.
Chip-enable gating with 1.5ns propagation	Prevents erroneous RAM writes during power faults; compatible with µP address/data bus timing.
Battery-backup switchover hysteresis	40mV total (20mV V_CC–V_BATT differential) eliminates oscillation during slow V_CC decay.
Guaranteed 1.2V operation	RESET/RESET outputs remain valid even as V_CC or V_BATT drops to 1.2V, supporting deep-sleep modes.
Ultra-low 10µA supply current	Minimizes standby power draw in battery-powered applications without sacrificing reset accuracy.

Applications

Industrial Controller Power Monitoring	Portable Medical Device Backup
Use Scenario: Real-time PLC controller with nonvolatile SRAM retaining calibration data during AC mains interruption. IC Role / Device Role / Timing Role: Supervises 5V main rail and 3.3V logic rail; triggers reset if either falls below threshold; gates CE to freeze RAM access during brownout. Use Value: Prevents memory corruption during 150ms+ grid dropout; 4.63V V_CC threshold aligns with 5V supply tolerance; 1.235V RESET IN monitors 3.3V rail via R-divider.	Use Scenario: Handheld ECG monitor using coin-cell backup to retain patient session data during battery swap. IC Role / Device Role / Timing Role: Switches SRAM supply from main Li-ion to backup coin cell within 20mV V_CC–V_BATT window; asserts RESET to halt processor before voltage collapse. Use Value: Enables hot-swap capability without data loss; <10µA quiescent current extends coin-cell life to >5 years; 12µS CE OUT hold time completes final RAM write.
POS Terminal Memory Protection	Set-Top Box Firmware Integrity
Use Scenario: Retail point-of-sale terminal with flash-based firmware and SRAM cache requiring write-protection during power glitches. IC Role / Device Role / Timing Role: Monitors 5V system rail; gates CE signal to SRAM during reset; uses RESET IN to detect 1.8V I/O rail failure. Use Value: Eliminates need for discrete CE logic; 2ns CE propagation delay avoids timing violations on 25MHz bus; 1.235V RESET IN threshold allows accurate 1.8V monitoring with 1% resistors.	Use Scenario: Cable set-top box with secure boot ROM and configuration SRAM vulnerable to corruption during brownouts. IC Role / Device Role / Timing Role: Provides synchronized reset to CPU and memory controller; isolates CE path during V_CC sag; maintains V_OUT from backup during 100ms outage. Use Value: Ensures deterministic boot state after power recovery; 4.6Ω V_CC-to-OUT resistance sustains 65mA load at 3.15V; 150ms reset timeout exceeds CPU reset spec.

Industrial Controller Power Monitoring

Portable Medical Device Backup

Use Scenario: Real-time PLC controller with nonvolatile SRAM retaining calibration data during AC mains interruption.

IC Role / Device Role / Timing Role: Supervises 5V main rail and 3.3V logic rail; triggers reset if either falls below threshold; gates CE to freeze RAM access during brownout.

Use Value: Prevents memory corruption during 150ms+ grid dropout; 4.63V V_CC threshold aligns with 5V supply tolerance; 1.235V RESET IN monitors 3.3V rail via R-divider.

Use Scenario: Handheld ECG monitor using coin-cell backup to retain patient session data during battery swap.

IC Role / Device Role / Timing Role: Switches SRAM supply from main Li-ion to backup coin cell within 20mV V_CC–V_BATT window; asserts RESET to halt processor before voltage collapse.

Use Value: Enables hot-swap capability without data loss; <10µA quiescent current extends coin-cell life to >5 years; 12µS CE OUT hold time completes final RAM write.

POS Terminal Memory Protection

Set-Top Box Firmware Integrity

Use Scenario: Retail point-of-sale terminal with flash-based firmware and SRAM cache requiring write-protection during power glitches.

IC Role / Device Role / Timing Role: Monitors 5V system rail; gates CE signal to SRAM during reset; uses RESET IN to detect 1.8V I/O rail failure.

Use Value: Eliminates need for discrete CE logic; 2ns CE propagation delay avoids timing violations on 25MHz bus; 1.235V RESET IN threshold allows accurate 1.8V monitoring with 1% resistors.

Use Scenario: Cable set-top box with secure boot ROM and configuration SRAM vulnerable to corruption during brownouts.

IC Role / Device Role / Timing Role: Provides synchronized reset to CPU and memory controller; isolates CE path during V_CC sag; maintains V_OUT from backup during 100ms outage.

Use Value: Ensures deterministic boot state after power recovery; 4.6Ω V_CC-to-OUT resistance sustains 65mA load at 3.15V; 150ms reset timeout exceeds CPU reset spec.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6368HKA44+T	4.38V V_CC reset threshold (vs. 4.63V); identical pinout, features, and timing.	Suitable for 4.5V nominal supplies where tighter margin is required before reset assertion.	Select when system V_CC nominal is 4.5V and 120mV headroom is preferred over 4.63V's 130mV.
MAX6368PKA46+T	Open-drain active-low RESET output (vs. active-high); same V_CC/RESET IN thresholds and CE functionality.	Required for legacy µP designs with active-low reset inputs or existing pull-down bias networks.	Choose when interfacing to processors expecting low-active reset signaling or when redesigning minimal-change replacements.

Compared with MAX6368HKA44+T and MAX6368PKA46+T, the MAX6368HKA46+T offers the highest V_CC reset threshold in the family for robust 5V system margin, while its active-high RESET simplifies interface to modern µPs with high-active reset inputs and eliminates need for external inverters.

Availability

MAX6368HKA46+T is available at Aetrix Electronics and suitable for industrial control, portable medical devices, POS terminals, and set-top boxes requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6368HKA46+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.

The MAX6365–MAX6368 family was designed specifically for microprocessor system supervision with integrated battery backup, chip-enable gating, and configurable reset functions-targeting space- and power-constrained embedded systems.

FAQ

What is the exact reset threshold voltage for MAX6368HKA46+T?

The MAX6368HKA46+T has a factory-preset V_CC reset threshold of 4.63V (typical), with a guaranteed range of 4.50V to 4.75V across temperature. This value is laser-trimmed during production and applies specifically to the "46" suffix in the part number. The MAX6368HKA46+T also features a separate 1.235V internal reference for its RESET IN comparator, enabling precise secondary supply monitoring.

How does the RESET IN function work on MAX6368HKA46+T?

The RESET IN pin on MAX6368HKA46+T compares an external voltage to a 1.235V internal reference. When the voltage at RESET IN falls below 1.235V, the device asserts the RESET output. This function is used to monitor secondary power rails-such as 3.3V or 1.8V logic supplies-via a resistor divider. The MAX6368HKA46+T specifies ±50mV tolerance on this threshold and <25nA input leakage, ensuring accurate and low-disturbance monitoring.

What package type and dimensions does MAX6368HKA46+T use?

The MAX6368HKA46+T is supplied in an 8-pin SOT23 package measuring 2.9mm × 1.6mm × 1.1mm. It uses standard SOT23 pinout with pin 1 marked by a dot on the top surface. The "+T" suffix indicates lead(Pb)-free tape-and-reel packaging (2500 pieces per reel), compliant with RoHS requirements. No thermal pad or exposed die attach is present.

Can MAX6368HKA46+T operate with a 1.2V supply?

Yes, the MAX6368HKA46+T is fully specified to operate with V_CC or V_BATT as low as 1.2V. Its RESET and RESET outputs remain functional and guaranteed down to this voltage, and its quiescent current stays below 10µA. This capability supports ultra-low-voltage operation in energy-harvesting or deep-sleep battery applications where system rails may dip to 1.2V without losing supervision integrity.

What is the purpose of the CE IN and CE OUT pins on MAX6368HKA46+T?

The CE IN and CE OUT pins implement hardware-enforced chip-enable gating: CE IN receives the µP's chip-enable signal, and CE OUT delivers a conditioned version to the SRAM. During normal operation, CE IN passes directly to CE OUT with 2ns propagation delay. When reset is asserted, CE OUT is disabled-preventing spurious memory writes during power faults. The MAX6368HKA46+T guarantees CE IN leakage <1µA and CE IN-to-CE OUT on-resistance of 20–100Ω, ensuring compatibility with high-speed buses.

MAX6368HKA46+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:: 4.63V

Output:: Open Drain or Open Collector

Reset:: Active High

Reset Timeout:: 150ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-8

MAX6368HKA46+T FAQ

1.How can I place an order for MAX6368HKA46+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6368HKA46+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 MAX6368HKA46+T reliable?

The price and inventory of MAX6368HKA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6368HKA46+T is usually 5 days.

3.What payment methods are accepted for MAX6368HKA46+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6368HKA46+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6368HKA46+T?

MAX6368HKA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6368HKA46+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 MAX6368HKA46+T?

For technical support, including MAX6368HKA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6368HKA46+T requirements.

6.How does Aetrix verify that MAX6368HKA46+T is sourced from the original manufacturer or authorized distributors?

All MAX6368HKA46+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 MAX6368HKA46+T meets industry standards.

7.What is the process for return or replacement of MAX6368HKA46+T?

All MAX6368HKA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6368HKA46+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 MAX6368HKA46+T part is unused and in its original packaging.

Return procedure for MAX6368HKA46+T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…