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Analog Devices Inc./Maxim Integrated MAX6392KA16+
- Part No.:
- MAX6392KA16+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6392KA16+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,068
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Product details
Overview
MAX6392KA16+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with sequenced reset outputs, designed for multi-rail power-up sequencing in embedded systems. It monitors VCC (master supply) at 1.58V threshold and RESET IN2 (adjustable down to 625mV), asserts active-low push-pull RESET1 and open-drain RESET2 with guaranteed reset validity down to VCC = 1V, and supports manual reset via MR input - used in industrial controllers and multivoltage servers.
For engineers reviewing the MAX6392KA16+ datasheet, MAX6392KA16+ pinout, MAX6392KA16+ application, or MAX6392KA16+ equivalent, key selection criteria include its fixed 140ms (min) RESET1 timeout, user-adjustable or fixed RESET2 delay, dual-supply monitoring architecture, and SOT23-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6392KA16+ implements two independent voltage comparators: one for VCC (factory-set 1.58V threshold) and one for RESET IN2 (625mV internal reference). RESET1 is push-pull, asserted when VCC falls below threshold and deasserted ≥140ms after VCC recovery; RESET2 is open-drain, asserted if either VCC or RESET IN2 drops below their thresholds, and deasserted only after both recover and RESET1 has deasserted.
Sequencing logic ensures RESET2 always deasserts after RESET1 on power-up and asserts before RESET1 on power-down. The CSRT pin selects between fixed 140ms (min) RESET2 timeout (when tied to VCC) or capacitor-adjustable timing (via external cap to GND), while MR provides active-low manual reset with 50µs minimum pulse width and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.54V (min) to 1.61V (max) - factory-trimmed for precise 1.58V nominal brownout detection at VCC |
| RESET IN2 Threshold | 610mV to 640mV - fixed internal 625mV reference enables monitoring of secondary supplies as low as 625mV |
| RESET1 Timeout | 140ms (min) to 280ms (max) - guarantees processor reset hold time across -40°C to +85°C temperature range |
| RESET2 Timeout | 140ms (min) fixed when CSRT = VCC; adjustable via external capacitor - enables custom sequencing delays for slave rails |
| Supply Current | 15µA (typ) - ultra-low quiescent current supports battery-backed or energy-sensitive applications |
| Reset Valid Down To | VCC = 1.0V - ensures reliable reset assertion during deep brownout conditions before system collapse |
| MR Input Logic | Active-low with 47kΩ internal pullup - eliminates external pullup resistor; 50µs minimum pulse width prevents noise-induced resets |
Pinout & Package
MAX6392KA16+ is housed in an 8-pin SOT23 package (3.00mm × 1.75mm × 1.30mm body, 0.65mm pitch), rated for -40°C to +85°C operation, with lead-free termination (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN2 | Secondary supply monitor input | High-impedance comparator input referenced to 625mV; accepts external resistive divider to set custom reset threshold |
| 2 - VCC | Main supply and master reset source | Power supply input and primary voltage monitor; all resets assert when VCC drops below 1.58V |
| 3 - CSRT | RESET2 timeout configuration node | Connect to VCC for fixed 140ms (min) delay; connect to external capacitor for user-adjustable timing (600nA current source) |
| 4 - GND | Ground reference | Analog and digital ground common return; required for accurate comparator reference and reset timing |
| 5 - RESET2 | Secondary reset output | Open-drain, active-low output; deasserts only after both VCC and RESET IN2 recover AND RESET1 has deasserted |
| 6 - R2 | Internal pullup connection for RESET2 | 47kΩ internal resistor; connect to external VOH rail (e.g., 3.3V or 5V) to set RESET2 high-level voltage independently |
| 7 - RESET1 | Primary reset output | Push-pull, active-low output; provides direct drive without external pullup; deasserts ≥140ms after VCC recovery |
| 8 - MR | Manual reset input | Active-low input with 47kΩ internal pullup to VCC; forces both RESET1 and RESET2 low for system-initiated reset |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring with sequencing control | Enables deterministic power-up order: RESET1 deasserts first, then RESET2 - critical for FPGA/CPU/ASIC boot sequences |
| Guaranteed reset validity to VCC = 1V | Ensures robust reset assertion during severe brownout, preventing partial initialization or latch-up in downstream logic |
| MR input with glitch rejection | 100ns noise immunity and 50µs minimum pulse width prevent spurious resets from board-level EMI or switch bounce |
| Low 15µA supply current | Minimizes standby power draw in always-on systems such as industrial gateways and remote sensors |
| SOT23-8 footprint with no external timing components required | Reduces BOM count and PCB area vs. discrete RC-based supervisors; compatible with automated SMT assembly |
Applications
| Industrial PLC Controllers | Server Power Sequencing |
|---|---|
|
Use Scenario: Multi-rail power delivery to CPU, memory, and I/O ASICs in programmable logic controllers requiring strict startup order. IC Role / Device Role / Timing Role: Primary supervisor enforcing RESET1 → RESET2 sequence to ensure FPGA config completes before peripheral initialization. Use Value: Eliminates need for discrete timers or CPLD-based sequencing logic, reducing design cycle time and field failure risk from timing violations. |
Use Scenario: Dual-voltage (12V/5V/3.3V/1.8V) server motherboard where auxiliary rails must power up before main core voltage. IC Role / Device Role / Timing Role: Monitors 3.3V master rail (VCC) and 1.8V slave rail (via RESET IN2 divider); generates staggered reset signals aligned to JEDEC JESD79 compliance. Use Value: Ensures DDR memory controller resets only after VDDQ stabilizes, preventing bus contention and data corruption during boot. |
| Medical Diagnostic Equipment | Automotive Infotainment Head Units |
|
Use Scenario: Safety-critical imaging subsystems requiring fail-safe power monitoring across analog sensor, digital processing, and display rails. IC Role / Device Role / Timing Role: Acts as centralized reset arbiter: RESET1 holds main SoC in reset until 5V analog supply meets spec; RESET2 releases display driver after 140ms delay. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing deterministic reset behavior under brownout conditions. |
Use Scenario: In-vehicle infotainment with separate 5V USB, 3.3V MCU, and 1.2V GPU supplies subject to load-dump transients. IC Role / Device Role / Timing Role: Monitors 5V main rail (VCC) and 3.3V MCU rail (RESET IN2); MR input allows head unit reset via front-panel button without firmware involvement. Use Value: Provides hardware-level recovery from frozen UI states, meeting ISO 16750-2 transient immunity requirements with no software dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6392KA22+ | Factory-set VCC threshold = 2.19V (vs. 1.58V); identical pinout, timing, and feature set | Used where higher master supply threshold is needed to tolerate wider VCC tolerance or avoid premature reset | Select MAX6392KA22+ when system VCC nominal is ≥2.5V and tighter brownout margin is required |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold), no RESET IN2 input or sequenced dual-reset outputs | Lacks secondary supply monitoring and RESET2 sequencing - suitable only for single-rail systems | Choose TPS3808G15DBVR only for cost-sensitive, single-voltage applications where sequencing is handled externally |
Compared with MAX6392KA22+, the MAX6392KA16+ enables earlier reset assertion for low-voltage systems (e.g., 1.8V domains), while the TPS3808G15DBVR offers lower cost but forfeits dual-supply coordination - making MAX6392KA16+ essential for multirail integrity.
Availability
MAX6392KA16+ is available at Aetrix Electronics and suitable for industrial PLC controllers, server power sequencing, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6392KA16+ 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 demanding industrial, automotive, and communications applications.
The MAX6392KA16+ belongs to Maxim's µP supervisory product line, engineered specifically for deterministic, dual-rail power sequencing in systems where voltage-dependent boot order directly impacts functional safety and reliability.
FAQ
What is the exact VCC reset threshold voltage for MAX6392KA16+?
The MAX6392KA16+ has a factory-trimmed VCC reset threshold of 1.58V nominal, with guaranteed limits of 1.54V (minimum) and 1.61V (maximum) over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and is specific to the KA16 variant - confirmed in the Electrical Characteristics table and Selector Guide.
Does MAX6392KA16+ support adjustable RESET2 timeout, and how is it configured?
Yes, MAX6392KA16+ supports user-adjustable RESET2 timeout via the CSRT pin. Connect an external capacitor from CSRT to GND to set the delay; timing follows tRP2 = 2.08 × 10⁶ × CCSRT (seconds). For fixed 140ms (min) timeout, tie CSRT directly to VCC - this disables the capacitor ramp and activates the internal counter chain.
Can MAX6392KA16+ monitor a 1.2V supply as the secondary voltage (RESET IN2)?
Yes, MAX6392KA16+ can monitor a 1.2V supply on RESET IN2 using an external resistive divider. With its internal 625mV reference, a divider ratio of R3/R4 = (1.2V / 0.625V) − 1 ≈ 0.92 sets the correct threshold. For example, R4 = 500kΩ and R3 = 460kΩ yields ~1.2V trip point - verified in Applications Information section.
What is the function of the MR pin on MAX6392KA16+, and does it affect both reset outputs?
The MR pin on MAX6392KA16+ is an active-low manual reset input with internal 47kΩ pullup to VCC. When pulled low, it forces both RESET1 (push-pull) and RESET2 (open-drain) active simultaneously. RESET1 remains asserted for its full timeout after MR release; RESET2 follows its own timing, ensuring coordinated system reset - a feature absent in the MAX6391 series.
Is MAX6392KA16+ compatible with 1.0V VCC operation, and what happens to reset functionality?
Yes, MAX6392KA16+ guarantees valid reset operation down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. At 1.0V, RESET1 and RESET2 remain fully functional - asserting low when thresholds are violated and holding reset for minimum timeout periods - enabling use in ultra-low-voltage brownout scenarios.
MAX6392KA16+ 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.58V, 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
MAX6392KA16+ FAQ
1.How can I place an order for MAX6392KA16+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6392KA16+ 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 MAX6392KA16+ reliable?
The price and inventory of MAX6392KA16+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6392KA16+ is usually 5 days.
3.What payment methods are accepted for MAX6392KA16+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6392KA16+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6392KA16+?
MAX6392KA16+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6392KA16+ 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 MAX6392KA16+?
For technical support, including MAX6392KA16+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6392KA16+ requirements.
6.How does Aetrix verify that MAX6392KA16+ is sourced from the original manufacturer or authorized distributors?
All MAX6392KA16+ 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 MAX6392KA16+ meets industry standards.
7.What is the process for return or replacement of MAX6392KA16+?
All MAX6392KA16+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6392KA16+, 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 MAX6392KA16+ part is unused and in its original packaging.
Return procedure for MAX6392KA16+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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