Maxim

Temperature Range Codes

Note: Temperature code is the FIRST letter of the suffix in Maxim's system.

Package Type Codes (Second Letter)

Through-Hole Packages

Surface Mount - Standard

Surface Mount - Small Form Factor

Surface Mount - Power/Thermal

Pin Count Codes (Third Letter)

RoHS/Lead-Free Status

Common Prefixes and Product Categories

MAX Prefix (Maxim Original)

DS Prefix (Dallas Semiconductor)

ICL Prefix (Intersil Legacy)

DG Prefix (Data Gate)

DS18B20 Special Suffixes

The DS18B20 family uses simplified package codes:

Common Series Reference

Interface ICs

Temperature Sensors

Real-Time Clocks

Power Management

Handler Implementation Notes

Current Issues in MaximHandler

1. HashSet Usage: Uses new HashSet<>() instead of immutable Set.of():

   // CURRENT (problematic)
   Set<ComponentType> types = new HashSet<>();
   types.add(...);
   
   // RECOMMENDED
   return Set.of(
       ComponentType.INTERFACE_IC_MAXIM,
       ComponentType.VOLTAGE_REGULATOR_MAXIM,
       ...
   );
   

2. Missing Pattern Coverage: Many product families lack patterns:

   • MAX232/MAX485 interface ICs (only generic IC patterns)
   • MAX6675 thermocouple converters
   • MAX17xxx power management
   • MAX4xxx analog switches

3. Incomplete Package Extraction: Only handles DS18B20 specifically:

   // Current implementation only handles DS18B20
   if (mpn.startsWith("DS18")) {
       if (mpn.endsWith("Z")) return "TO-92";
       // etc.
   }
   

4. Limited Series Extraction: Only extracts DS18B20 and MAX6xxx series.

Recommended Pattern Additions

// Interface ICs
registry.addPattern(ComponentType.INTERFACE_IC_MAXIM, "^MAX[234]8[0-9][A-Z0-9]*$");

// Thermocouple converters
registry.addPattern(ComponentType.TEMPERATURE_SENSOR_MAXIM, "^MAX66[0-9]{2}[A-Z0-9-]*$");

// RTCs
registry.addPattern(ComponentType.RTC_MAXIM, "^DS1[23][0-9]{2}[A-Z0-9]*$");
registry.addPattern(ComponentType.RTC_MAXIM, "^DS3[0-9]{3}[A-Z0-9]*$");

// Power management
registry.addPattern(ComponentType.BATTERY_MANAGEMENT_MAXIM, "^MAX17[0-9]{3}[A-Z0-9-]*$");

// Analog switches
registry.addPattern(ComponentType.IC, "^MAX4[0-9]{3}[A-Z0-9-]*$");
registry.addPattern(ComponentType.IC, "^DG4[0-9]{2}[A-Z0-9-]*$");

Package Code Extraction

// Maxim package codes follow TEMP+PACKAGE+PINS format
// Example: MAX232CPE+ -> C=temp, P=PDIP, E=16-pin

// Extract package from 3-letter suffix
String suffix = extractSuffix(mpn);  // e.g., "CPE"
if (suffix.length() >= 2) {
    char packageCode = suffix.charAt(1);  // Second char is package
    switch (packageCode) {
        case 'P': case 'N': return "PDIP";
        case 'S': return "SOIC (narrow)";
        case 'A': case 'W': return "SOIC (wide)";
        case 'E': return "QSOP";
        case 'U': return "TSSOP";
        case 'T': return "SOT-23";
        // etc.
    }
}

Related Files

• Handler: manufacturers/MaximHandler.java
• Component types: INTERFACE_IC_MAXIM, VOLTAGE_REGULATOR_MAXIM, RTC_MAXIM, TEMPERATURE_SENSOR_MAXIM, BATTERY_MANAGEMENT_MAXIM, MEMORY_MAXIM
• Manufacturer entry: ComponentManufacturer.MAXIM with regex (?:MAX|DS|ICL|DG|UP|LT|LTC|LTM)

Learnings & Edge Cases

• Dallas Semiconductor: Acquired by Maxim in 2001; DS-prefix parts are Maxim products
• Analog Devices acquisition: Maxim was acquired by ADI in 2021; parts still use Maxim naming
• MAX232 vs MAX232A: The "A" suffix indicates improved specs (faster slew rate, smaller caps)
• ESD-protected variants: MAX485E has enhanced ESD protection vs standard MAX485
• Temperature code position: In Maxim's 3/4-letter suffix, temperature is FIRST letter
• DS18B20 authenticity: Counterfeit DS18B20 sensors are common; genuine parts have laser-etched markings
• LT/LTC/LTM prefixes: These are Linear Technology products (also owned by ADI), but registered in Maxim handler