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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:3,475
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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 secondary supply down to 625mV), provides push-pull RESET1 and open-drain RESET2 with fixed 140ms minimum timeout, and includes active-low manual reset (MR). Used in industrial controllers and multivoltage servers requiring controlled power-on order.
For engineers reviewing the MAX6392KA16 datasheet, MAX6392KA16 pinout, MAX6392KA16 application, or MAX6392KA16 equivalent, this device supports precise voltage monitoring, sequenced reset assertion/deassertion timing, manual reset triggering with sub-10µs skew, and operation down to VCC = 1.0V - critical for brownout resilience and dual-processor coordination.
Technical Context
The MAX6392KA16 implements two independent voltage comparators: one fixed-threshold (1.58V) comparator on VCC driving RESET1, and a second 625mV reference comparator on RESET IN2 driving RESET2. RESET2 asserts whenever either input falls below its threshold, but deasserts only after both inputs exceed thresholds *and* RESET1 has deasserted - enforcing strict power-up sequence.
Its internal architecture includes a 600nA current source for capacitor-adjustable RESET2 timeout (via CSRT), a 47kΩ internal pullup on MR, and separate timing chains for RESET1 (fixed 140ms min) and RESET2 (140ms min or user-adjustable). RESET1 is push-pull; RESET2 is open-drain with dedicated R2 pullup terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.58V (factory-fixed; ensures reliable reset assertion during 1.8V rail brownout) |
| RESET IN2 Threshold | 625mV (internal reference; enables monitoring of supplies as low as 625mV via external resistor divider) |
| RESET1 Timeout | 140ms min (guaranteed minimum delay after VCC recovery; ensures µP core stabilization before release) |
| RESET2 Timeout | 140ms min (fixed when CSRT tied to VCC); adjustable up to ~3.1ms with 1500pF capacitor |
| Supply Current | 15µA typical (enables always-on supervision in battery-backed or low-power systems) |
| Reset Valid Down To | VCC = 1.0V (guarantees functional reset assertion even during deep undervoltage conditions) |
| MR Input Pulse Width | 50µs minimum (supports clean manual reset initiation without contact bounce issues) |
Pinout & Package
Package: 8-pin SOT23 (3.00mm × 1.75mm × 1.30mm body; JEDEC MO178 compliant; lead-free available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN2 | Secondary supply monitor input | High-impedance node for external resistive divider; sets RESET2 trigger point down to 625mV |
| 2 - VCC | Main supply and master reset reference | Power input and primary voltage monitor; all resets assert if VCC < 1.58V |
| 3 - CSRT | RESET2 timeout configuration | Connect to VCC for fixed 140ms timeout; connect to capacitor for user-adjustable delay (600nA ramp) |
| 4 - GND | Analog/digital ground reference | Common return for all internal comparators, timers, and output drivers |
| 5 - RESET2 | Secondary reset output | Open-drain, active-low; requires external pullup or connection to R2 for VOH control |
| 6 - R2 | Internal pullup connection for RESET2 | 47kΩ resistor internally connected to RESET2; tie to desired VOH voltage (e.g., 3.3V or 5V) |
| 7 - RESET1 | Primary reset output | Push-pull, active-low; drives low without external components; compatible with TTL/CMOS logic inputs |
| 8 - MR | Manual reset input | Active-low, internally pulled up to VCC via 47kΩ; forces both RESET1 and RESET2 low when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Sequenced reset assertion | RESET2 always asserts before RESET1 on power-down and deasserts after RESET1 on power-up - enforces deterministic boot order |
| Two-tier voltage monitoring | Independent 1.58V VCC monitor + 625mV RESET IN2 reference enables supervision of asymmetric dual-rail systems (e.g., 1.8V core + 3.3V I/O) |
| Manual reset with timing control | MR input triggers synchronized RESET1/RESET2 assertion with <10µs skew - eliminates race conditions in system-level reset propagation |
| Low-voltage operation guarantee | Valid reset signaling down to VCC = 1.0V ensures reliability during marginal supply conditions where many supervisors fail |
| Minimal external components | No external capacitors required for basic operation; only optional for RESET2 timeout adjustment or custom pullup voltages |
Applications
| Industrial PLC Controllers | Servers with Dual-Voltage Processors |
|---|---|
Use Scenario: Powering up an ARM-based PLC with separate 1.8V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: MAX6392KA16 monitors both rails and sequences RESET1 (for core) before RESET2 (for I/O), ensuring core logic stabilizes prior to peripheral initialization. Use Value: Prevents I/O bus contention and state corruption by enforcing strict power-on dependency between voltage domains. | Use Scenario: Managing boot sequence in a dual-CPU server board with 1.2V CPU core and 1.8V memory interface. IC Role / Device Role / Timing Role: MAX6392KA16 uses VCC = 1.2V (1.58V threshold variant selected via resistor divider on RESET IN2) to supervise core, while RESET IN2 monitors memory rail via 625mV reference scaling. Use Value: Enables single-chip coordination of heterogeneous voltage domains without discrete timing logic or additional supervisors. |
| Medical Diagnostic Equipment | Automated Test Equipment (ATE) |
Use Scenario: Ensuring safe startup of FPGA-based imaging subsystem with 1.0V transceiver and 2.5V analog front-end. IC Role / Device Role / Timing Role: MAX6392KA16 asserts RESET2 (for analog section) only after RESET1 (for FPGA core) deasserts, preventing analog biasing before digital configuration. Use Value: Eliminates analog transient injection during FPGA configuration - critical for signal integrity in high-precision diagnostics. | Use Scenario: Coordinating power sequencing across multiple instrument modules with varying supply requirements (1.5V, 3.3V, 5V). IC Role / Device Role / Timing Role: MAX6392KA16 serves as central sequencer: RESET1 controls main controller, RESET2 triggers auxiliary measurement ASICs after stable clock and core operation. Use Value: Reduces test setup time and improves repeatability by eliminating manual power sequencing steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage 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 | Designed for 2.5V or 3.3V main supplies; not suitable for 1.8V systems requiring tight margin | Select MAX6392KA22 only when VCC nominal is ≥2.5V and 1.58V threshold would cause premature reset assertion |
| TPS3808G15 | Single-supply supervisor (1.5V threshold); no secondary input or sequenced outputs; SOT23-6 package | Lacks RESET IN2 monitoring and RESET2 sequencing - cannot replace dual-rail coordination function | Use only as partial substitute in single-rail designs where sequenced reset is unnecessary |
Compared with MAX6392KA22 and TPS3808G15, the MAX6392KA16 uniquely supports 1.8V-system brownout detection with guaranteed reset validity down to 1.0V VCC and full dual-input sequencing - making it irreplaceable in tightly regulated low-voltage embedded platforms.
Availability
MAX6392KA16 is available at Aetrix Electronics and suitable for industrial controllers, medical diagnostic equipment, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C operation.
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 industrial, computing, and communications applications.
The MAX6391/MAX6392 product line delivers integrated dual-supply supervision with sequenced reset outputs - engineered specifically for complex multivoltage systems where deterministic power-up order prevents initialization faults.
FAQ
What is the factory-set VCC reset threshold voltage for MAX6392KA16?
The MAX6392KA16 has a factory-set VCC reset threshold of 1.58V (minimum 1.54V, maximum 1.61V across temperature). This value is laser-trimmed during production and applies to all units bearing the KA16 suffix. The threshold ensures reliable reset assertion during 1.8V rail brownout events while maintaining sufficient hysteresis margin. This exact specification is confirmed in the Electrical Characteristics table of the official MAX6391/MAX6392 datasheet.
Does MAX6392KA16 support manual reset functionality, and how is it implemented?
Yes, MAX6392KA16 includes an active-low manual reset (MR) input on pin 8. When MR is pulled low, it forces both RESET1 (push-pull) and RESET2 (open-drain) into active-low state immediately, with RESET2 asserting within 100ns and RESET1 within 10µs. The MR pin features an internal 47kΩ pullup to VCC. This functionality is exclusive to the MAX6392 family (not present in MAX6391), and is fully documented in the Pin Description and Detailed Description sections of the MAX6392KA16 datasheet.
Can MAX6392KA16 monitor a 1.2V supply directly on the RESET IN2 pin?
No, MAX6392KA16 cannot monitor a 1.2V supply directly on RESET IN2 because its internal reference is fixed at 625mV. To supervise a 1.2V rail, an external resistive divider must be used: e.g., R3 = 470kΩ and R4 = 500kΩ yields VRST ≈ 1.2V per the formula VRST = 0.625V × (R3 + R4)/R4. This configuration is explicitly validated in the Applications Information section of the MAX6392KA16 datasheet and ensures accurate threshold tracking across temperature.
What is the minimum VCC voltage at which MAX6392KA16 guarantees valid reset operation?
MAX6392KA16 guarantees valid reset assertion and timing behavior down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This allows the device to remain functional during severe brownout conditions where other supervisors cease operation. The guarantee covers both RESET1 and RESET2 outputs and is tested across the full -40°C to +85°C temperature range - a key differentiator confirmed in the "Guaranteed Reset Valid to VCC = 1V" feature bullet.
How is the RESET2 timeout period configured on MAX6392KA16?
The RESET2 timeout on MAX6392KA16 is configured via the CSRT pin (pin 3): connecting CSRT to VCC selects a fixed 140ms minimum timeout, while connecting CSRT to an external capacitor (e.g., 1500pF to GND) enables user-adjustable delay calculated as tRP2 ≈ 2.08 × 10⁶ × CCSRT seconds. The internal 600nA current source ramps voltage across the capacitor until it reaches the 1.25V internal reference. This dual-mode configuration is detailed in the Applications Information and Electrical Characteristics sections of the MAX6392KA16 datasheet.
MAX6392KA16 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:
- 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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