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Analog Devices Inc./Maxim Integrated MAX6301CSA+TCL0
- Part No.:
- MAX6301CSA+TCL0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6301CSA+TCL0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,080
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Product details
Overview
MAX6301CSA+TCL0 from Maxim Integrated is an adjustable low-power microprocessor supervisory circuit with open-drain active-low reset output, 4µA supply current, 1.22V internal reference, and externally programmable reset/watchdog timeout via capacitors on SRT/SWT pins. It monitors VCC or external supply rails in battery-powered embedded controllers requiring brownout immunity and watchdog supervision.
For engineers reviewing the MAX6301CSA+TCL0 datasheet, MAX6301CSA+TCL0 pinout, MAX6301CSA+TCL0 application, or MAX6301CSA+TCL0 equivalent, key selection criteria include guaranteed RESET assertion down to VCC = 1V, power-supply transient immunity up to 50µs at 100mV overdrive, 500× watchdog timeout extension via WDS pin, and compatibility with µP bidirectional reset I/O using external pull-up.
Technical Context
The MAX6301CSA+TCL0 implements a precision 1.22V bandgap reference feeding a high-impedance reset comparator whose threshold is set by an external resistor divider on RESET IN. Its reset timeout (tRP) and watchdog timeout (tWD) are generated by 500nA current sources charging external capacitors at SRT and SWT, respectively.
Watchdog operation supports two modes: normal (WDS = GND, tWD in ms) and extended (WDS = VCC, tWD × 500 in seconds), with automatic timer clearing on WDI/WDS transitions or RESET assertion. The open-drain RESET output ensures safe interfacing with bidirectional µP reset pins and allows wired-OR configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2V to +5.5V - operates across full 3.3V/5V logic domains and tolerates brownout down to 2V |
| Quiescent Current | 4.0µA typical - enables multi-year battery life in portable medical instruments and remote sensors |
| Reset Threshold Reference | 1.22V ±25mV - stable internal reference enabling precise external voltage monitoring via resistor divider |
| Reset Timeout Range | 2.8ms to 5.2ms with 1500pF - user-selectable delay prevents premature µP release during power ramp |
| Watchdog Timeout (Normal) | 2.8ms to 5.2ms with 1500pF - matches typical firmware service intervals for real-time control loops |
| Watchdog Timeout (Extended) | 1.4s to 2.6s with 1500pF - enables ultra-low-power sleep/wake cycles without frequent µP wake-ups |
| Power-Supply Transient Immunity | 50µs max duration at 100mV overdrive - suppresses false resets from switching noise or ESD-induced glitches |
Pinout & Package
MAX6301CSA+TCL0 is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free, with 1.27mm pitch and standard JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | High-impedance reset comparator input | Accepts external resistor-divider to set custom reset threshold VRST = 1.22 × (R1 + R2)/R2 |
| 2 - GND | Analog/digital ground reference | Common return for internal reference, comparators, and timing current sources |
| 3 - SRT | Reset timeout capacitor connection | Sinks 500nA to ground; tRP = 2.67 × CSRT (pF) → µs; requires low-leakage ceramic cap |
| 4 - SWT | Watchdog timeout capacitor connection | Sinks 500nA to ground; tWD = 2.67 × CSWT (pF) → µs; same capacitor requirements as SRT |
| 5 - WDS | Watchdog mode select input | Logic-low = normal mode (ms timeout); logic-high = extended mode (×500, s timeout) |
| 6 - WDI | Watchdog input trigger | Rising/falling edge resets watchdog timer; 30ns minimum pulse width; high-Z in normal mode |
| 7 - RESET | Open-drain active-low reset output | Pulled low during reset assertion; requires external pull-up; compatible with bidirectional µP reset I/O |
| 8 - VCC | Positive supply input | Must be bypassed with 0.1µF ceramic capacitor placed adjacent to pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset threshold | Settable above 1.22V using external resistors - eliminates need for fixed-threshold variants across diverse supply rails |
| 500× watchdog timeout multiplier | WDS pin selects extended mode - enables single-capacitor design for both fast fault detection and long sleep periods |
| Guaranteed RESET assertion at VCC ≥ 1V | Ensures reliable µP initialization even during deep brownout - critical for medical equipment safety compliance |
| Power-supply transient immunity | Immune to ≤50µs negative transients at 100mV overdrive - reduces false resets in noisy industrial environments |
| Open-drain RESET output | Supports wired-OR reset buses and direct interface to bidirectional µP reset pins without level-shifting |
Applications
| Medical Infusion Pumps | Portable Diagnostic Handhelds |
|---|---|
Use Scenario: Battery-powered infusion pump maintaining precise drug delivery during AC/DC adapter transitions and battery depletion. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers hardware reset if voltage drops below 2.7V; asserts reset for 4ms to ensure µP restarts cleanly after brownout. Use Value: Prevents motor runaway or dosage miscalculation by guaranteeing µP reset before supply collapses below functional voltage. |
Use Scenario: Handheld blood glucose meter operating from coin-cell battery with aggressive sleep/wake cycling to extend shelf life. IC Role / Device Role / Timing Role: Generates wake-up pulse every 30s using extended-mode watchdog (WDS = VCC, CSWT = 1µF → ~22min timeout ×500 = ~30s actual). Use Value: Reduces average system current to <1µA by keeping µP asleep >99% of time while ensuring deterministic wake-up timing. |
| Industrial PLC Remote I/O Modules | Set-Top Box Power Sequencing |
Use Scenario: DIN-rail mounted I/O module exposed to 24V DC field wiring with inductive kickback and ESD events. IC Role / Device Role / Timing Role: Monitors isolated 5V logic supply; detects transients via RESET IN; holds µP in reset for 4ms after each event. Use Value: Eliminates spurious reboots caused by 20–50µs supply dips from relay switching or nearby motor starts. |
Use Scenario: Consumer STB requiring controlled power-up sequence between SoC, memory, and tuner ICs after cold start. IC Role / Device Role / Timing Role: Provides 4ms reset pulse synchronized to 5V rail stabilization; RESET IN tied to 3.3V LDO output for secondary monitoring. Use Value: Ensures all subsystems initialize in defined order, preventing bus contention or configuration lockup during boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6303CSA+T | Push-pull active-low RESET output; guaranteed RESET valid down to VCC = 0V with pulldown resistor | Required where µP reset pin cannot tolerate open-drain configuration or needs guaranteed low state at sub-1V VCC | Select when driving reset-sensitive peripherals that require strong drive strength or fail-safe behavior below 1V |
| TPS3808G01DBVR | Fixed 1.0V reset threshold; 1.8–6.0V supply range; 1.8µA quiescent current; no adjustable watchdog | Used in cost-sensitive consumer electronics where only basic reset supervision is needed without watchdog flexibility | Select when design uses fixed-voltage rails and does not require programmable timeout or watchdog extension |
Compared with MAX6303CSA+T, the MAX6301CSA+TCL0 offers lower system-level BOM count via open-drain flexibility but lacks sub-1V reset assurance; compared with TPS3808G01DBVR, it trades lower quiescent current for full adjustability of both reset and watchdog thresholds and timing - essential for battery-constrained or multi-rail systems.
Availability
MAX6301CSA+TCL0 is available at Aetrix Electronics and suitable for medical equipment, portable diagnostic devices, and industrial PLC remote I/O modules requiring stable component supply with long-term lifecycle support.
Supply support for MAX6301CSA+TCL0 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 demanding industrial, medical, and communications applications.
The MAX6301–MAX6304 family was engineered specifically for low-power microprocessor supervision in space-constrained, battery-operated systems where adjustable reset thresholds and flexible watchdog timing are mandatory.
FAQ
What is the guaranteed minimum VCC for RESET assertion in MAX6301CSA+TCL0?
The MAX6301CSA+TCL0 guarantees RESET is asserted (driven low) for VCC ≥ 1V. This ensures reliable µP initialization during power-up and brownout conditions down to 1V, making it suitable for applications where supply collapse must trigger immediate reset before logic becomes unstable. Below 1V, RESET behavior is not guaranteed, and external pulldown may be required for fail-safe operation.
How do I calculate the reset timeout capacitor value for MAX6301CSA+TCL0?
For MAX6301CSA+TCL0, connect a capacitor (CSRT) between pin 3 (SRT) and GND. Use the formula CSRT (pF) = tRP (µs) / 2.67. For example, a 4000µs timeout requires CSRT = 4000 / 2.67 ≈ 1500pF. Ceramic capacitors with leakage <10nA are mandatory; avoid electrolytic or high-leakage types to prevent timing drift.
Can MAX6301CSA+TCL0 monitor voltages other than VCC?
Yes, MAX6301CSA+TCL0 can monitor any DC voltage by connecting it to the RESET IN pin (pin 1) through a resistor divider. The internal 1.22V reference sets VRST = 1.22 × (R1 + R2)/R2. This allows supervision of 1.8V, 2.5V, 3.3V, or custom rails - commonly used in multi-rail systems like set-top boxes or industrial controllers where individual supply integrity must be verified.
What is the function of the WDS pin on MAX6301CSA+TCL0?
The WDS pin (pin 5) on MAX6301CSA+TCL0 selects watchdog timer mode: grounded for normal mode (tWD in milliseconds), or tied to VCC for extended mode (tWD × 500, yielding seconds-scale timeout). A state change on WDS resets the watchdog counter. This dual-mode capability enables one hardware design to serve both fast-fault detection and ultra-low-power wake-up timing without changing components.
Does MAX6301CSA+TCL0 support bidirectional µP reset pins?
Yes, MAX6301CSA+TCL0 supports bidirectional µP reset pins via its open-drain RESET output (pin 7). When used with an external pull-up resistor, either the MAX6301CSA+TCL0 or the µP can assert reset - essential for systems like Motorola 68HC11-based controllers where the µP may also drive reset under software control. No level-shifting or additional logic is required.
MAX6301CSA+TCL0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 2.8ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6301CSA+TCL0 FAQ
1.How can I place an order for MAX6301CSA+TCL0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6301CSA+TCL0 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 MAX6301CSA+TCL0 reliable?
The price and inventory of MAX6301CSA+TCL0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6301CSA+TCL0 is usually 5 days.
3.What payment methods are accepted for MAX6301CSA+TCL0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6301CSA+TCL0 transactions.
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4.How is shipping managed for MAX6301CSA+TCL0?
MAX6301CSA+TCL0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6301CSA+TCL0 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 MAX6301CSA+TCL0?
For technical support, including MAX6301CSA+TCL0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6301CSA+TCL0 requirements.
6.How does Aetrix verify that MAX6301CSA+TCL0 is sourced from the original manufacturer or authorized distributors?
All MAX6301CSA+TCL0 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 MAX6301CSA+TCL0 meets industry standards.
7.What is the process for return or replacement of MAX6301CSA+TCL0?
All MAX6301CSA+TCL0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6301CSA+TCL0, 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 MAX6301CSA+TCL0 part is unused and in its original packaging.
Return procedure for MAX6301CSA+TCL0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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