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Analog Devices Inc./Maxim Integrated MAX6320PUK30BW-T
- Part No.:
- MAX6320PUK30BW-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6320PUK30BW-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,799
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Product details
Overview
MAX6320PUK30BW-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, manual reset input, and watchdog timer. It features a factory-trimmed 3.0V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and 1.6s typical watchdog timeout. Designed for brownout protection and system recovery in battery-powered embedded controllers.
For engineers reviewing the MAX6320PUK30BW-T datasheet, MAX6320PUK30BW-T pinout, MAX6320PUK30BW-T application, or MAX6320PUK30BW-T equivalent, this page delivers verified electrical parameters, SOT23-5 terminal mapping, real-world use cases in portable instrumentation and industrial control, and two validated alternative parts with documented functional differences.
Technical Context
The MAX6320PUK30BW-T implements a voltage-monitoring architecture with internal precision voltage divider and comparator to assert reset when VCC falls below 3.0V ±2.5%. Its open-drain RESET output requires an external pullup resistor (e.g., 10kΩ) and supports interface with multiple supply domains up to 6V.
It integrates a watchdog timer cleared by rising/falling edges on WDI, with four factory-programmable timeout options - this part uses the 'Y' variant (1.12s to 2.4s, typ 1.6s). Manual reset is enabled via MR pin with internal 52kΩ pullup and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±2.5% over -40°C to +125°C - ensures reliable power-on reset at nominal 3.0V rail without external calibration |
| Reset Timeout Period | 140ms (min) - guarantees sufficient hold time for microcontroller initialization after power stabilization |
| Watchdog Timeout | 1.6s (typ), range 1.12–2.4s - provides robust software hang detection for mid-speed embedded firmware |
| Supply Current | 5µA (typ) at VCC = 3.6V - enables multi-year operation in coin-cell–powered devices |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
| Package | SOT23-5 (U5+2A) - 2.9mm × 1.6mm footprint with 0.95mm height, compatible with standard reflow profiles |
| AEC-Q100 Qualified | Yes - meets stress testing requirements for automotive electronics (Grade 1) |
Pinout & Package
SOT23-5 package (outline 21-0057, land pattern 90-0174), RoHS-compliant, lead-free option available as MAX6320PUK30BW+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset output; sinks current only - requires external pullup to any voltage ≤6V; asserts during VCC undervoltage, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators and logic - must be connected directly to system ground plane |
| 3 | MR | Manual reset input; active-low with internal 52kΩ pullup - debounced internally; 100ns glitch rejection prevents spurious resets |
| 4 | WDI | Watchdog input; edge-sensitive - rising or falling edge clears timer; unconnected = auto-serviced every ~1.4s (7/8 × tWD) |
| 5 | VCC | Power supply input; monitors voltage from 1.0V to 5.5V - reset guaranteed valid down to VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain RESET with 0.4V VOL @ 3.2mA | Enables level-shifting across mixed-voltage systems (e.g., 3.3V supervisor driving 5V µP reset line) |
| Factory-trimmed 3.0V threshold (±2.5%) | Eliminates need for external resistor divider or calibration in 3.0V/3.3V applications |
| 140ms reset timeout (C-suffix) | Matches typical boot-time requirements of ARM Cortex-M0/M3 and PIC18F microcontrollers |
| 1.6s watchdog timeout (Y-suffix) | Optimized for firmware loops executing every 500ms–1s, providing margin against timing jitter |
| AEC-Q100 Grade 1 qualification | Validated for automotive cabin and engine-control module deployment without additional qualification effort |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
|
Use Scenario: Coin-cell–powered wireless sensor node operating intermittently for >5 years. IC Role / Device Role / Timing Role: Supervises 3.0V LDO output; asserts open-drain RESET to hold MCU in reset until stable power is confirmed post-wake. Use Value: 5µA quiescent current extends battery life; 140ms timeout ensures full LDO settling before firmware execution. |
Use Scenario: Industrial PLC I/O module with dual 3.3V/5V rails and watchdog-critical firmware. IC Role / Device Role / Timing Role: Monitors primary 3.0V logic rail; open-drain RESET pulled up to 5V enables direct interface with 5V-compatible FPGA configuration logic. Use Value: Level-flexible reset signaling avoids level translators; AEC-Q100 rating supports extended temperature operation in uncooled enclosures. |
| Intelligent Instruments | Controllers |
|
Use Scenario: Handheld multimeter with auto-ranging ADC and LCD driver requiring clean power-up sequencing. IC Role / Device Role / Timing Role: Generates reset pulse synchronized to 3.0V analog supply stabilization; MR pin used for front-panel hard-reset button. Use Value: Internal MR pullup eliminates external components; 100ns glitch rejection prevents false triggers from ESD events near buttons. |
Use Scenario: HVAC zone controller using 8-bit MCU with limited internal reset supervision. IC Role / Device Role / Timing Role: Provides independent watchdog monitoring of main loop; WDI driven by GPIO toggled at known intervals in firmware main task. Use Value: 1.6s watchdog timeout allows safe margin for communication delays while preventing infinite hangs from UART timeouts or sensor faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6320PUK30DY-T | Same 3.0V threshold, same SOT23-5 package, but D-suffix = 1.12s reset timeout (vs. C-suffix = 140ms) | Requires longer reset assertion - unsuitable where fast MCU boot is critical (e.g., real-time data loggers) | Select only if system demands >1s reset hold time; verify compatibility with target µP's minimum reset pulse width spec. |
| TPS3808G30DBVR | 3.0V threshold, open-drain output, but push/pull MR input (no internal pullup); 200ms min reset timeout; no watchdog | Lacks watchdog functionality - cannot replace MAX6320PUK30BW-T in systems requiring software hang detection | Use only in simple power-monitoring applications without watchdog needs; add external RC or GPIO-based watchdog if required. |
Compared with MAX6320PUK30BW-T, MAX6320PUK30DY-T offers longer reset hold time but identical supervision and watchdog behavior, while TPS3808G30DBVR provides basic voltage monitoring without watchdog capability - both require layout or firmware changes to substitute.
Availability
MAX6320PUK30BW-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial embedded controllers, and automotive cabin electronics requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MAX6320PUK30BW-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, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6316–MAX6322 family targets cost-sensitive, space-constrained embedded systems needing reliable power-on reset, manual reset, and watchdog supervision - with emphasis on low quiescent current and wide temperature operation.
FAQ
What is the exact reset threshold voltage tolerance for MAX6320PUK30BW-T over temperature?
The MAX6320PUK30BW-T has a nominal reset threshold of 3.00V with ±2.5% tolerance over the full operating range of -40°C to +125°C. At +25°C, the tolerance tightens to ±1.5%, and the device guarantees valid reset assertion down to VCC = 1V. This specification is factory-trimmed and verified per Maxim's production test flow.
Does MAX6320PUK30BW-T require an external pullup resistor on the RESET pin?
Yes, MAX6320PUK30BW-T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor to any supply up to 6V is recommended and sufficient in most applications. The pullup value must balance logic-high integrity against total current draw from all connected devices on the reset bus.
What is the watchdog timeout period programmed into MAX6320PUK30BW-T?
The 'W' in the suffix of MAX6320PUK30BW-T indicates the watchdog timeout period is set to the 'Y' variant: 1.12s to 2.4s, with a typical value of 1.6s. This is factory-programmed and non-adjustable. The timer resets on any edge (rising or falling) at the WDI pin or during active reset assertion.
Can MAX6320PUK30BW-T operate with a 2.8V supply rail?
No - MAX6320PUK30BW-T requires VCC ≥ 3.0V to guarantee proper reset deassertion, as its 3.0V threshold means reset remains active below that level. While the device may function down to VCC = 1.0V (per Absolute Maximum Ratings), it will continuously assert RESET below 3.0V and cannot supervise a 2.8V rail. For 2.8V systems, consider MAX6320PUK28BW-T (2.8V threshold).
Is MAX6320PUK30BW-T pin-compatible with other parts in the MAX6316–MAX6322 family?
Yes, all MAX6316–MAX6322 devices share the identical SOT23-5 pinout and package outline (21-0057). However, reset output type varies: MAX6320PUK30BW-T uses open-drain, while MAX6316LUK30BW-T uses push/pull. Swapping requires verifying output stage compatibility and adjusting external circuitry (e.g., removing pullup for push/pull variants).
MAX6320PUK30BW-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6320PUK30BW-T FAQ
1.How can I place an order for MAX6320PUK30BW-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6320PUK30BW-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 MAX6320PUK30BW-T reliable?
The price and inventory of MAX6320PUK30BW-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6320PUK30BW-T is usually 5 days.
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MAX6320PUK30BW-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6320PUK30BW-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 MAX6320PUK30BW-T?
For technical support, including MAX6320PUK30BW-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6320PUK30BW-T requirements.
6.How does Aetrix verify that MAX6320PUK30BW-T is sourced from the original manufacturer or authorized distributors?
All MAX6320PUK30BW-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 MAX6320PUK30BW-T meets industry standards.
7.What is the process for return or replacement of MAX6320PUK30BW-T?
All MAX6320PUK30BW-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6320PUK30BW-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 MAX6320PUK30BW-T part is unused and in its original packaging.
Return procedure for MAX6320PUK30BW-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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