My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6392KA44+T
- Part No.:
- MAX6392KA44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6392KA44+T.pdf
- Description:
- IC SUPERVISOR MPU DL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6392KA44+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with sequenced reset outputs, designed for multi-rail systems requiring controlled power-up/power-down sequencing. It monitors VCC (master supply) at 4.38V threshold and RESET IN2 (adjustable secondary supply), asserts push-pull RESET1 and open-drain RESET2 with fixed 140ms minimum timeout, and includes active-low manual reset (MR) input - used in industrial controllers and multivoltage servers.
For engineers reviewing the MAX6392KA44+T datasheet, MAX6392KA44+T pinout, MAX6392KA44+T application, or MAX6392KA44+T equivalent, key selection considerations include its factory-set 4.38V VCC reset threshold, MR-triggered dual-reset assertion timing, CSRT-configurable RESET2 delay, and guaranteed reset validity down to VCC = 1V in extended temperature range.
Technical Context
The MAX6392KA44+T implements two independent voltage monitoring paths: a precision bandgap-based comparator for VCC (4.38V ±0.13V threshold) and a high-impedance 625mV reference comparator for RESET IN2. RESET1 is push-pull, active-low, and deasserts ≥140ms after VCC exceeds threshold; RESET2 is open-drain, asserted whenever VCC < 4.38V or RESET IN2 < 625mV, and deasserts after either fixed 140ms (CSRT tied to VCC) or capacitor-adjustable delay.
Its internal 47kΩ MR pullup and R2 pullup enable direct interface to external VOH voltages without discrete resistors. The device guarantees functional reset operation down to VCC = 1.0V and exhibits immunity to negative VCC transients ≤100ns at 10mV overdrive, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.38V (factory-fixed, ±0.13V tolerance) - sets primary brownout detection point for 4.5V nominal rails |
| RESET IN2 Threshold | 625mV (internal reference) - enables monitoring of secondary supplies as low as 625mV via external resistor divider |
| RESET1 Timeout | 140ms min - ensures stable µP initialization before release of primary reset signal |
| RESET2 Timeout | 140ms min (fixed) or user-adjustable via CSRT capacitor - supports flexible sequencing between master and slave subsystems |
| Supply Current | 15µA typical - enables integration into low-power always-on monitoring circuits |
| Operating Temperature | -40°C to +85°C - qualified for industrial and embedded computing environments |
| Reset Valid Down To | VCC = 1.0V - maintains reliable reset assertion during deep brownout conditions |
Pinout & Package
MAX6392KA44+T is housed in an 8-pin SOT23 package (3.00mm × 1.75mm × 1.30mm body, 0.65mm pitch), lead-free, RoHS-compliant, and specified for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN2 | Secondary supply monitor input | High-impedance node for external resistor divider; sets RESET2 activation threshold relative to 625mV internal reference |
| 2 - VCC | Main supply and master monitor input | Power source and primary reset trigger; must exceed 4.38V for RESET1 deassertion |
| 3 - CSRT | RESET2 timeout configuration terminal | Connect to VCC for fixed 140ms delay or to external capacitor for user-adjustable timeout (tRP2 = 2.08×10⁶ × CCSRT) |
| 4 - GND | Analog/digital ground reference | Common return path for all internal comparators, reset logic, and output drivers |
| 5 - RESET2 | Secondary reset output | Open-drain, active-low output; asserted before RESET1 on power-down and deasserted after RESET1 on power-up |
| 6 - R2 | Internal pullup connection for RESET2 | 47kΩ resistor tied internally to RESET2; connect to external VOH rail for level-shifted high-state drive |
| 7 - RESET1 | Primary reset output | Push-pull, active-low output; provides direct µP reset without external pullup; sinks 3.2mA at VCC ≥ 4.25V |
| 8 - MR | Manual reset input | Active-low, internally pulled up to VCC via 47kΩ; forces both RESET1 and RESET2 low for ≥50µs pulse width |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 4.38V VCC threshold | Eliminates external resistor network for primary rail monitoring; reduces BOM count and layout area |
| Adjustable RESET IN2 monitoring | Supports custom reset points for secondary supplies (e.g., 1.2V, 1.8V, 3.3V) using only two external resistors |
| Sequenced RESET1/RESET2 timing | Guarantees RESET1 deasserts first on power-up and RESET2 asserts first on power-down - prevents race conditions in dual-processor systems |
| MR-initiated synchronized reset | Ensures deterministic system-wide reset with sub-10µs skew between RESET1 and RESET2 assertion |
| 15µA quiescent current | Enables permanent installation in battery-backed or energy-harvesting monitoring applications without significant drain |
Applications
| Industrial PLC Controllers | Servers with Dual-Voltage Processors |
|---|---|
Use Scenario: Power sequencing across FPGA, ARM core, and I/O voltage rails in programmable logic controllers. IC Role / Device Role / Timing Role: Primary supervisory IC enforcing strict power-up order: 3.3V I/O → 1.8V FPGA core → 1.2V ARM core, using RESET1 for I/O and RESET2 for core domains. Use Value: Prevents latch-up and bus contention by ensuring peripheral initialization completes before processor boot begins. |
Use Scenario: Coordinated reset management for CPU (VDD = 1.2V) and memory controller (VDDQ = 1.35V) in rack-mounted servers. IC Role / Device Role / Timing Role: Dual-threshold monitor asserting RESET1 on CPU rail and RESET2 on memory rail, with MR enabling field-service hard reset without chassis power cycle. Use Value: Enables hot-swap-safe reset isolation - memory remains held while CPU reboots, preserving DRAM contents during firmware update. |
| Medical Imaging Power Subsystems | Automated Test Equipment (ATE) |
Use Scenario: Sequencing high-voltage analog front-end (5V), digital processing (3.3V), and sensor bias (2.5V) supplies in ultrasound beamformers. IC Role / Device Role / Timing Role: RESET1 controls analog supply enable; RESET2 triggers digital domain release after analog stabilization, timed via CSRT capacitor. Use Value: Eliminates analog settling noise coupling into ADC during power-up by enforcing ≥200ms delay between analog rail stability and digital clock enable. |
Use Scenario: Ensuring deterministic startup of FPGA-based pattern generators and DAC-based stimulus sources in benchtop ATE. IC Role / Device Role / Timing Role: Supervises 12V analog supply (via RESET IN2 divider) and 3.3V logic supply (VCC), asserting RESET2 only after both are stable and within tolerance. Use Value: Guarantees test head calibration integrity by preventing pattern generation until all analog references and digital clocks meet spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6392KA46+T | Higher factory-set VCC threshold (4.63V vs. 4.38V); identical pinout, timing, and feature set | Targeted for 5V nominal rails with tighter margin; not suitable for 4.5V systems requiring early brownout detection | Select when system VCC nominal is 5.0V ±5% and brownout must occur above 4.5V |
| TPS3808G33DBVR | Single-supply supervisor (3.3V fixed threshold); no secondary monitor input or sequenced dual outputs | Lacks RESET IN2 monitoring and independent RESET2 timing control - cannot replace sequenced dual-rail functionality | Use only for single-rail applications where RESET2 sequencing is unnecessary and cost sensitivity outweighs feature requirements |
Compared with MAX6392KA44+T, the MAX6392KA46+T offers higher reset threshold for tighter 5V rail margining but same sequencing capability, while TPS3808G33DBVR provides lower-cost single-rail supervision at the expense of dual-voltage coordination and manual reset integration.
Availability
MAX6392KA44+T is available at Aetrix Electronics and suitable for industrial controllers, multivoltage servers, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6392KA44+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 industrial, communications, and computing applications.
The MAX6392KA44+T belongs to Maxim's µP supervisory product line, engineered specifically for reliable power sequencing and fault detection in dual- and multi-voltage embedded systems.
FAQ
What is the factory-set VCC reset threshold voltage for MAX6392KA44+T?
The MAX6392KA44+T has a factory-set VCC reset threshold of 4.38V, with a tolerance of ±0.13V (min 4.25V, max 4.50V). This value is laser-trimmed during production and applies across the full -40°C to +85°C temperature range. The threshold is optimized for 4.5V nominal supply rails and ensures robust brownout detection without external components.
How does the manual reset (MR) input affect RESET1 and RESET2 timing in MAX6392KA44+T?
When the MR pin of MAX6392KA44+T is pulled low, both RESET1 (push-pull) and RESET2 (open-drain) assert immediately and remain asserted for the full timeout period after MR returns high - 140ms minimum for RESET1 and either 140ms minimum or capacitor-adjustable for RESET2. MR-to-RESET1 delay is ≤10µs; MR-to-RESET2 delay is ≤100ns, ensuring synchronized assertion critical for system-level recovery.
Can MAX6392KA44+T monitor a 1.8V supply as the secondary voltage, and how is it configured?
Yes, MAX6392KA44+T can monitor a 1.8V supply using the RESET IN2 pin. An external resistor divider (e.g., R3 = 1.1MΩ, R4 = 500kΩ) scales the 1.8V rail down to 625mV at RESET IN2, matching the internal reference. The MAX6392KA44+T detects this condition and asserts RESET2 accordingly, enabling precise secondary-rail supervision without additional ICs.
What is the role of the CSRT pin in MAX6392KA44+T, and how does it affect RESET2 behavior?
The CSRT pin in MAX6392KA44+T configures RESET2 timeout: tying CSRT to VCC selects a fixed 140ms minimum delay, while connecting CSRT to a capacitor to ground enables user-adjustable delay (tRP2 ≈ 2.08×10⁶ × CCSRT seconds). This flexibility allows designers to fine-tune sequencing intervals between RESET1 and RESET2 for specific system boot requirements.
Is MAX6392KA44+T compatible with 1.0V VCC operation, and what functions remain active?
Yes, MAX6392KA44+T guarantees valid reset operation down to VCC = 1.0V. At this level, the internal comparators, reset logic, and open-drain RESET2 output remain functional, though RESET1 push-pull drive strength is reduced. This ensures fail-safe reset assertion during severe brownout - a key reliability feature confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
MAX6392KA44+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.38V, Adj
- Output:
- Open Drain, Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 140ms/Adjustable Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6392KA44+T FAQ
1.How can I place an order for MAX6392KA44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6392KA44+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 MAX6392KA44+T reliable?
The price and inventory of MAX6392KA44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6392KA44+T is usually 5 days.
3.What payment methods are accepted for MAX6392KA44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6392KA44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6392KA44+T?
MAX6392KA44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6392KA44+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 MAX6392KA44+T?
For technical support, including MAX6392KA44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6392KA44+T requirements.
6.How does Aetrix verify that MAX6392KA44+T is sourced from the original manufacturer or authorized distributors?
All MAX6392KA44+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 MAX6392KA44+T meets industry standards.
7.What is the process for return or replacement of MAX6392KA44+T?
All MAX6392KA44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6392KA44+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 MAX6392KA44+T part is unused and in its original packaging.
Return procedure for MAX6392KA44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6392KA44+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…
