My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6301CUA
- Part No.:
- MAX6301CUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6301CUA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,432
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6301CUA from Maxim Integrated is an 8-pin µMAX® low-power microprocessor supervisory circuit with adjustable reset threshold (≥1.22V), adjustable reset timeout (2.8–5.2ms with 1500pF), and adjustable watchdog timeout (2.8–5.2ms normal / 1.4–2.6s extended mode). It features open-drain active-low RESET output, 4µA supply current, and immunity to power-supply transients - used in battery-powered medical equipment and embedded controllers for reliable brownout and hang detection.
For engineers reviewing the MAX6301CUA datasheet, MAX6301CUA pinout, MAX6301CUA application, or MAX6301CUA equivalent, this page delivers verified electrical parameters, exact µMAX-8 package mapping, confirmed reset/watchdog timing behavior, and two validated alternative parts - all directly traceable to Maxim's official documentation and ordering guide.
Technical Context
The MAX6301CUA implements a precision bandgap-based reset comparator with 1.22V internal reference, externally adjustable via resistor divider on RESET IN. Its reset assertion is guaranteed down to VCC = 1V, and reset deassertion includes a programmable timeout determined by capacitor CSRT on SRT pin.
Its watchdog timer uses a 500nA precision current source at SWT pin to generate timeout periods; WDS pin selects between normal (2.67 × CSWT) and extended (500×) modes. Watchdog clearing occurs on WDI edge transitions or WDS state changes, with internal pull-down behavior in extended mode when WDI is unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2V to +5.5V - supports standard +3.3V and +5V systems with brownout detection down to 1V operation. |
| Quiescent Current | 4.0µA typical - enables multi-year battery life in portable medical and IoT monitoring devices. |
| Reset Threshold Accuracy | ±25mV at 1.22V reference - allows precise voltage monitoring with external resistor network (VRST = 1.22 × (R1+R2)/R2). |
| Reset Timeout Period | 2.8–5.2ms with 1500pF on SRT - provides configurable delay to ensure stable µP initialization after power-up. |
| Watchdog Timeout (Normal) | 2.8–5.2ms with 1500pF on SWT - matches fast software loops requiring frequent watchdog servicing. |
| Watchdog Timeout (Extended) | 1.4–2.6s with 1500pF on SWT and WDS = VCC - enables ultra-low-power wake-up timer applications without µP intervention. |
| Power-Supply Transient Immunity | Withstands ≤50µs negative transients of 100mV below VRST - prevents false resets during switching noise or ESD events. |
Pinout & Package
MAX6301CUA is housed in an 8-pin µMAX® package (U8-1 outline, 3mm × 3mm, 0.5mm pitch), RoHS-compliant and thermally rated for 0°C to +70°C operation. The package supports high-density PCB layouts and offers thermal dissipation of 330mW at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | High-impedance reset comparator input | Accepts external resistor divider to set custom reset threshold ≥1.22V; leakage < ±1nA avoids threshold drift. |
| 2 - GND | Analog and digital ground reference | Common return for precision current sources (SRT/SWT) and reset comparator; must be low-impedance. |
| 3 - SRT | Reset timeout capacitor connection | Connects to ground via low-leakage ceramic capacitor (e.g., 1500pF); sets tRP = 2.67 × CSRT (µs). |
| 4 - SWT | Watchdog timeout capacitor connection | Connects to ground via low-leakage ceramic capacitor; sets tWD = 2.67 × CSWT (µs) in normal mode. |
| 5 - WDS | Watchdog mode select input | Logic-low = normal mode; logic-high = extended mode (500× timeout); transition clears watchdog timer. |
| 6 - WDI | Watchdog input trigger | Rising/falling edge resets watchdog timer; in extended mode, unconnected WDI is internally serviced. |
| 7 - RESET | Open-drain active-low reset output | Drives µP reset pin low during fault; requires external pull-up; sinks ≥3.2mA at VCC ≥ 4.5V. |
| 8 - VCC | Positive supply input | Must be bypassed with 0.1µF ceramic capacitor placed adjacent to pin; operates from +2V to +5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset threshold | Set to any voltage ≥1.22V using external resistors - eliminates need for fixed-threshold variants across diverse supply rails. |
| 500× watchdog timeout multiplier | WDS pin extends timeout from milliseconds to seconds - enables sleep/wake cycles without µP firmware changes. |
| Guaranteed RESET assertion at VCC ≥ 1V | Ensures valid reset signal even during deep brownout - critical for fail-safe shutdown in medical and industrial systems. |
| Power-supply transient immunity | Rejects ≤50µs, 100mV transients - reduces false resets in noisy environments like motor-driven or RF-adjacent designs. |
| Open-drain RESET output | Allows wired-OR configuration with other reset sources and compatibility with bidirectional µP reset pins (e.g., 68HC11). |
Applications
| Medical Vital Sign Monitors | Portable Diagnostic Handhelds |
|---|---|
|
Use Scenario: Battery-powered ECG/SpO₂ monitor operating on single Li-ion cell with dynamic voltage sag during measurement bursts. IC Role / Device Role / Timing Role: Supervises main supply rail; asserts RESET if VCC drops below 3.0V (set via R1/R2); holds reset for 4ms to guarantee µP reinitialization. Use Value: Prevents corrupted sensor data capture during brownout by forcing controlled reboot before firmware executes invalid instructions. |
Use Scenario: Handheld ultrasound probe with intermittent usage and aggressive power gating to extend battery life beyond 8 hours. IC Role / Device Role / Timing Role: Configured in extended watchdog mode (WDS = VCC); wakes µP every 2.2s via RESET pulse to perform self-test and sensor calibration. Use Value: Reduces average system current to <10µA by eliminating continuous µP clocking - no additional wake-up controller required. |
| Industrial PLC I/O Modules | Set-Top Box Power Management |
|
Use Scenario: DIN-rail mounted I/O module exposed to 24V DC supply fluctuations and EFT noise in factory environments. IC Role / Device Role / Timing Role: Monitors isolated 3.3V logic rail; detects transients >100mV/50µs and suppresses false resets using built-in immunity. Use Value: Maintains operational continuity during brief line disturbances - avoids spurious I/O state loss or communication timeouts. |
Use Scenario: Consumer STB entering deep sleep between channel changes; requires deterministic wake-up on IR or network event. IC Role / Device Role / Timing Role: Uses manual reset switch (parallel to R2) for user-initiated recovery; RESET IN tied to 5V standby rail for power-fail detection. Use Value: Enables hardware-level debounced reset independent of firmware - eliminates boot-loop risk after power interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6303CUA | Push-pull active-low RESET output (vs. open-drain); same pinout, timing, and adjustment capability. | Eliminates need for external pull-up resistor; better suited for driving multiple loads or long traces with capacitive loading. | Select MAX6303CUA when board layout lacks space for pull-up or when driving >100pF net capacitance. |
| TPS3808G01DBVR | Fixed 1.0V reset threshold; 1.8–6.0V supply range; 1.6µA quiescent current; no adjustable watchdog. | Lower power but no timeout or watchdog configurability; requires different resistor network for threshold scaling. | Choose TPS3808G01DBVR only for cost-sensitive, fixed-voltage applications where watchdog functionality is unnecessary. |
Compared with MAX6303CUA, MAX6301CUA saves BOM cost and board area by omitting the pull-up resistor but requires careful trace routing to avoid floating RESET. Compared with TPS3808G01DBVR, MAX6301CUA trades slightly higher current for full field-adjustability of both reset and watchdog timing - essential for prototyping and multi-rail designs.
Availability
MAX6301CUA is available at Aetrix Electronics and suitable for medical equipment, portable diagnostic devices, and industrial embedded controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6301CUA 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 - emphasizing low power, high reliability, and robust performance.
The MAX6301CUA belongs to Maxim's µP supervisory product line, engineered specifically for fail-safe reset generation and software hang detection in battery-constrained and noise-prone embedded systems.
FAQ
What is the minimum VCC at which MAX6301CUA guarantees RESET assertion?
MAX6301CUA guarantees RESET assertion at or above VCC = 1V. Below 1V, the internal circuitry cannot maintain valid logic levels on the open-drain RESET output. This specification ensures reliable brownout detection during gradual power failure - critical for preserving data integrity in medical monitors and industrial controllers before shutdown. The MAX6301CUA remains functional across its full +2V to +5.5V operating range, but the 1V guarantee defines its lower safe operating boundary for reset generation.
Can MAX6301CUA monitor a 3.3V supply while powered from 5V?
Yes. MAX6301CUA can monitor any supply voltage ≥1.22V independently of VCC. To monitor a 3.3V rail, connect RESET IN to a resistor divider (e.g., R1 = 1.69MΩ, R2 = 1MΩ) referenced to that 3.3V rail - not to VCC. The device's high-impedance RESET IN input draws <±1nA, minimizing loading. VCC may be supplied from a separate 5V source, enabling dual-rail supervision without level-shifting. This configuration is explicitly supported in Maxim's Typical Operating Circuit and Applications Information sections.
How does the 500× watchdog timeout extension work in MAX6301CUA?
The 500× watchdog timeout extension in MAX6301CUA is activated by driving WDS high (to VCC), which configures the internal timer to multiply the base timeout (set by CSWT on SWT pin) by 500. For example, a 1500pF capacitor yields ~4ms base timeout and ~2s extended timeout. Crucially, in extended mode, the watchdog function can be disabled by leaving WDI unconnected - the internal circuitry pulses WDI near timeout expiration to auto-clear the timer. This eliminates software overhead for periodic servicing in sleep-mode applications.
Is MAX6301CUA pin-compatible with MAX6302CUA or MAX6303CUA?
Yes - MAX6301CUA, MAX6302CUA, MAX6303CUA, and MAX6304CUA share identical 8-pin µMAX® pinouts and package dimensions (U8-1). They differ only in reset polarity (active-low vs. active-high) and output type (open-drain vs. push-pull). This allows direct substitution in existing layouts when changing reset interface requirements - e.g., replacing MAX6301CUA with MAX6303CUA removes the need for an external pull-up resistor while retaining identical timing and adjustment behavior.
What capacitor type is recommended for SRT and SWT connections on MAX6301CUA?
Low-leakage ceramic capacitors are recommended for both SRT and SWT pins, with leakage <10nA. X7R or C0G dielectrics are preferred due to stable capacitance over temperature and voltage. Avoid electrolytic or high-leakage tantalum types, as the internal 500nA timing current sources are highly sensitive to leakage - even 10nA error introduces >2% timing inaccuracy. For 4ms reset timeout, a 1500pF C0G capacitor yields precise 4.0ms ±5% tolerance per Maxim's Electrical Characteristics table.
MAX6301CUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-uMAX/uSOP
MAX6301CUA FAQ
1.How can I place an order for MAX6301CUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6301CUA 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 MAX6301CUA reliable?
The price and inventory of MAX6301CUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6301CUA is usually 5 days.
3.What payment methods are accepted for MAX6301CUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6301CUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6301CUA?
MAX6301CUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6301CUA 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 MAX6301CUA?
For technical support, including MAX6301CUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6301CUA requirements.
6.How does Aetrix verify that MAX6301CUA is sourced from the original manufacturer or authorized distributors?
All MAX6301CUA 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 MAX6301CUA meets industry standards.
7.What is the process for return or replacement of MAX6301CUA?
All MAX6301CUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6301CUA, 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 MAX6301CUA part is unused and in its original packaging.
Return procedure for MAX6301CUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6301CUA 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…
