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Analog Devices Inc./Maxim Integrated MAX6302CPA+
- Part No.:
- MAX6302CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6302CPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,122
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Product details
Overview
MAX6302CPA+ from Maxim Integrated is an active-high, open-drain microprocessor supervisory circuit with adjustable reset threshold (≥1.22V), adjustable reset timeout (2.8–5.2ms typical with 1500pF), and dual-mode watchdog timer (normal mode: 2.8–5.2ms; extended mode: up to 2.6s). It operates from 1.31V to 5.5V, draws only 4µA supply current, and is used in battery-powered medical instruments and embedded controllers requiring reliable brownout detection and software hang protection.
For engineers reviewing the MAX6302CPA+ datasheet, MAX6302CPA+ pinout, MAX6302CPA+ application, or MAX6302CPA+ equivalent, this page delivers verified functional identity, validated 8-pin PDIP package mapping, confirmed active-high open-drain reset output, exact watchdog timing behavior (500× multiplier via WDS), and two field-validated alternative parts with documented technical and application differences.
Technical Context
The MAX6302CPA+ implements a precision 1.22V internal reference driving a high-impedance reset comparator, enabling external resistor-divider programming of VRST ≥1.22V. Its reset assertion is guaranteed for VCC ≥1.31V, and reset deassertion includes a fixed timeout period set by capacitor CSRT on SRT pin.
Watchdog operation uses a 500nA precision current source at SWT to generate timeout periods scalable from milliseconds to seconds; WDS pin selects between normal (CSWT-based) and extended (500× scaled) modes, with automatic timer reset on WDI or WDS transitions. The device features power-supply transient immunity up to 50µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.31V to 5.5V - supports low-voltage battery operation down to single-cell Li-ion or alkaline systems. |
| Quiescent Supply Current | 4.0µA typical - enables multi-year operation in coin-cell–powered portable equipment. |
| Reset Threshold Voltage | Adjustable ≥1.22V via external R1/R2 divider - allows precise brownout detection for custom supply rails. |
| Reset Timeout Period | 2.8ms to 5.2ms (typical, CSRT = 1500pF) - ensures µP initialization completes before release from reset. |
| Watchdog Timeout (Normal) | 2.8ms to 5.2ms (CSWT = 1500pF) - matches fast-boot firmware execution cycles. |
| Watchdog Timeout (Extended) | 1.4s to 2.6s (CSWT = 1500pF, WDS = VCC) - enables long sleep intervals in wake-up timer applications. |
| Reset Output Type | Active-high, open-drain - allows wired-OR configuration with other reset sources and flexible pull-up voltage selection. |
Pinout & Package
MAX6302CPA+ is housed in an 8-pin plastic DIP (PDIP) package, 0.300" wide, RoHS-compliant with lead-free finish (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET IN | Reset threshold input | High-impedance node for external resistor divider; sets VRST = 1.22 × (R1 + R2)/R2. |
| 2 GND | Ground reference | Analog and digital ground common return; must be low-impedance for timing accuracy. |
| 3 SRT | Reset timeout capacitor input | Connects to precision 500nA current source; CSRT value directly sets tRP = 2.67 × CSRT (pF → µs). |
| 4 SWT | Watchdog timeout capacitor input | Connects to same 500nA current source as SRT; CSWT value sets basic tWD = 2.67 × CSWT (pF → µs). |
| 5 WDS | Watchdog mode select | Logic-low = normal mode; logic-high = extended mode (500× timeout); transition resets watchdog timer. |
| 6 WDI | Watchdog input | Rising/falling edge resets watchdog timer; in extended mode, can be left unconnected to disable watchdog. |
| 7 RESET | Active-high open-drain reset output | Drives high when asserted; requires external pull-up; compatible with bidirectional µP reset pins. |
| 8 VCC | Power supply input | Must be bypassed with 0.1µF ceramic capacitor placed adjacent to pin; valid from 1.31V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset threshold ≥1.22V | Enables brownout detection for non-standard supply rails (e.g., 1.8V, 2.5V, 3.3V) without redesigning supervisor IC. |
| 500× watchdog timeout multiplier | Allows one hardware design to support both fast-firmware monitoring (ms) and ultra-low-power wake-up timers (seconds). |
| 4µA supply current | Reduces battery drain in always-on portable devices; enables >10-year shelf life with CR2032 cells. |
| Power-supply transient immunity | Rejects glitches ≤50µs duration at 100mV overdrive - prevents spurious resets during switching noise events. |
| Open-drain active-high RESET output | Permits shared reset bus with multiple supervisors or µPs; eliminates need for level-shifting in mixed-voltage systems. |
Applications
| Medical Patient Monitor | Industrial Data Logger |
|---|---|
Use Scenario: Portable ECG unit powered by AA batteries, entering deep-sleep between measurements. IC Role / Device Role / Timing Role: MAX6302CPA+ acts as wake-up timer and brownout protector: WDS toggled to extend watchdog timeout to ~2s, triggering periodic µP wake-up; RESET IN monitors battery voltage. Use Value: Eliminates need for separate RTC or timer IC; 4µA quiescent current extends battery life beyond 3 years. |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 15 minutes. IC Role / Device Role / Timing Role: MAX6302CPA+ provides fail-safe reset during brownout and detects µP lockup via WDI polling; SRT/CSRT set for 4ms reset hold time. Use Value: Guarantees recovery from corrupted flash writes or SPI bus hangs without manual intervention. |
| Set-Top Box Power Management | Handheld Diagnostic Tool |
Use Scenario: Consumer STB with standby mode drawing <100µA, requiring reliable wake-on-IR and brownout recovery. IC Role / Device Role / Timing Role: MAX6302CPA+ monitors 3.3V rail; RESET output drives µP reset and enables PMIC sequencing; WDS tied high for extended watchdog during standby. Use Value: Prevents boot failure after AC dropout; open-drain RESET allows coexistence with HDMI CEC reset signaling. |
Use Scenario: Battery-powered handheld tool performing real-time signal analysis with FPGA and ARM core. IC Role / Device Role / Timing Role: MAX6302CPA+ supervises both FPGA configuration voltage and ARM core VDD; RESET IN connected to dual-rail monitor network. Use Value: Adjustable threshold ensures reset asserts before FPGA configuration fails (<1.25V), avoiding bitstream corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6304CPA+ | Push-pull active-high RESET output (vs. open-drain); identical timing, threshold, and supply specs. | Requires no external pull-up; unsuitable for wired-OR reset buses or bidirectional µP I/O pins. | Select MAX6304CPA+ when board layout lacks space for pull-up resistor or µP reset pin is unidirectional. |
| TPS3808G01DBVR | Fixed 1.0V reset threshold; 1.8–6.0V supply range; 2.5µA ICC; no adjustable watchdog timeout. | Lacks programmable watchdog and reset threshold; suited for simple power-good monitoring, not software hang detection. | Select TPS3808G01DBVR only for cost-sensitive, fixed-threshold applications where watchdog functionality is unnecessary. |
Compared with MAX6302CPA+, MAX6304CPA+ offers push-pull drive but forfeits reset bus sharing capability, while TPS3808G01DBVR reduces design flexibility with fixed threshold and no watchdog adjustability-making MAX6302CPA+ optimal for adaptive, low-power, multi-rail supervision.
Availability
MAX6302CPA+ is available at Aetrix Electronics and suitable for medical instrumentation, industrial data loggers, and consumer set-top boxes requiring stable component supply across extended production lifecycles.
Supply support for MAX6302CPA+ 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, with emphasis on reliability and low-power operation.
The MAX6301–MAX6304 family was engineered specifically for microprocessor supervision in battery-constrained and noise-prone environments, delivering adjustable reset and watchdog functions in miniature packages.
FAQ
What is the minimum operating voltage for MAX6302CPA+?
The MAX6302CPA+ guarantees full functionality-including active-high RESET assertion and watchdog operation-down to VCC = 1.31V. Below this, reset timing and comparator accuracy degrade; operation below 1.31V is not specified and may result in unreliable reset behavior. This makes MAX6302CPA+ suitable for single-cell lithium systems but not for sub-1.3V energy-harvesting rails.
How do I configure the reset threshold voltage for MAX6302CPA+?
Configure the reset threshold voltage for MAX6302CPA+ using an external resistor divider on RESET IN (Pin 1): VRST = 1.22 × (R1 + R2)/R2. Select R2 = 1MΩ as a starting point, then calculate R1 = R2 × (VRST/1.22 − 1). For example, for VRST = 3.0V, R1 ≈ 1.46MΩ. Use low-leakage resistors (<100pA) and keep traces short to avoid threshold drift.
Can MAX6302CPA+ watchdog function be disabled?
Yes, the watchdog function of MAX6302CPA+ can be disabled in extended mode (WDS = VCC) by leaving WDI unconnected-the internal driver automatically pulses WDI near timeout to prevent reset. In normal mode (WDS = GND), WDI must be actively toggled; leaving it floating will cause spurious resets. Disabling is not possible in normal mode.
What is the purpose of the SRT and SWT pins on MAX6302CPA+?
SRT (Pin 3) and SWT (Pin 4) on MAX6302CPA+ connect to external capacitors that set the reset timeout (tRP) and basic watchdog timeout (tWD), respectively. Both use a precision 500nA current source: tRP = 2.67 × CSRT (pF → µs), tWD = 2.67 × CSWT (pF → µs). Ceramic capacitors with leakage <10nA are mandatory for timing accuracy.
Is MAX6302CPA+ pin-compatible with other MAX630x variants?
Yes, MAX6302CPA+ shares identical 8-pin PDIP pinout and footprint with MAX6301CPA+, MAX6303CPA+, and MAX6304CPA+. However, output type differs: MAX6302CPA+ and MAX6304CPA+ provide active-high RESET, while MAX6301CPA+ and MAX6303CPA+ provide active-low. Swapping requires verifying reset polarity compatibility in the target system.
MAX6302CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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 High
- Reset Timeout:
- 2.8ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6302CPA+ FAQ
1.How can I place an order for MAX6302CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6302CPA+ 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 MAX6302CPA+ reliable?
The price and inventory of MAX6302CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6302CPA+ is usually 5 days.
3.What payment methods are accepted for MAX6302CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6302CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6302CPA+?
MAX6302CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6302CPA+ 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 MAX6302CPA+?
For technical support, including MAX6302CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6302CPA+ requirements.
6.How does Aetrix verify that MAX6302CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX6302CPA+ 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 MAX6302CPA+ meets industry standards.
7.What is the process for return or replacement of MAX6302CPA+?
All MAX6302CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6302CPA+, 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 MAX6302CPA+ part is unused and in its original packaging.
Return procedure for MAX6302CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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