FTDI Manufacturer Skill

Company Overview

FTDI (Future Technology Devices International) specializes in USB interface ICs and bridge chips. Their products convert USB to various protocols including serial UART, I2C, SPI, and parallel FIFO interfaces. FTDI chips are widely used for USB-to-serial converters, development boards, and embedded systems.

MPN Structure

FTDI MPNs follow this general structure:

FT[SERIES][VARIANT][PACKAGE][-QUALIFIER]
│    │       │        │         │
│    │       │        │         └── Optional: REEL=Tape/Reel, TUBE=Tube, TRAY=Tray
│    │       │        └── Package code (see table below)
│    │       └── Variant letter(s) (H=High-speed, D=Device, X=X-series)
│    └── Series number (232, 2232, 4232, 230, etc.)
└── FT prefix (always present)

Example Decoding

FT232RL
│  │ ││
│  │ │└── L = SSOP variant (RL = SSOP-28)
│  │ └── R = First generation revision
│  └── 232 = USB to UART bridge series
└── FT = FTDI prefix

FT2232H-REEL
│  │   │  │
│  │   │  └── REEL = Tape and reel packaging
│  │   └── H = High-speed USB 2.0
│  └── 2232 = Dual channel series
└── FT = FTDI prefix

FT230XS-R
│  │  ││ │
│  │  ││ └── R = Tape and reel (shortened)
│  │  │└── S = SSOP package
│  │  └── X = X-series (low-cost, simplified)
│  └── 230 = Basic UART series
└── FT = FTDI prefix

Supported Component Types

The FTDIHandler supports a single component type:

Note: FTDI products are all ICs - there are no manufacturer-specific component types defined (e.g., no USB_BRIDGE_FTDI).

Package Codes

Single Letter Codes

Two Letter Codes

Packaging Suffixes (After Hyphen)

Product Families

USB to Serial UART

USB to I2C

USB to SPI

USB to FIFO

Specialized Products

USB Speed Reference

Series Extraction Rules

The handler extracts series using these patterns:

// FT232 family - returns "FT232"
if (mpn.matches("^FT232[A-Z]{0,2}.*")) return "FT232";

// FT2232/FT4232 - returns "FT2232" or "FT4232"
if (mpn.matches("^FT2232[A-Z]?.*")) return "FT2232";
if (mpn.matches("^FT4232[A-Z]?.*")) return "FT4232";

// X-series - returns "FT230X", "FT231X", etc.
if (mpn.matches("^FT230X.*")) return "FT230X";
if (mpn.matches("^FT231X.*")) return "FT231X";
if (mpn.matches("^FT234X.*")) return "FT234X";

// USB 3.0 - returns "FT600" or "FT601"
if (mpn.matches("^FT600.*")) return "FT600";
if (mpn.matches("^FT601.*")) return "FT601";

// EVE series - returns "FT800" or "FT810", "FT811", etc.
if (mpn.matches("^FT800.*")) return "FT800";
if (mpn.matches("^FT81[0-9].*")) return mpn.substring(0, 5);  // FT810, FT811, etc.

Package Code Extraction Rules

The handler uses a priority system for package extraction:

1. Remove packaging suffixes first: Strip -REEL, -TUBE, -TRAY
2. Match specific patterns:
   • FT232[A-Z]{1,2}$ - Extract suffix after "FT232" (e.g., RL, RQ)
   • FT[24]232[A-Z]$ - Extract last character (e.g., H, D)
   • FT2[0-4][0-9]X[A-Z]? - Extract character after X (e.g., S, Q)
   • FT260[A-Z] - Extract character after "FT260"
   • FT60[0-1][A-Z]{1,2} - Extract suffix after "FT60x" (e.g., BL, BQ)
3. Resolve to package name: Use PACKAGE_CODES map

// Example: FT232RL-REEL
// Step 1: Remove -REEL -> FT232RL
// Step 2: Match FT232[A-Z]{1,2}$ -> suffix = "RL"
// Step 3: PACKAGE_CODES.get("RL") -> "SSOP"

Replacement Compatibility

The handler implements isOfficialReplacement() with these rules:

Same Series (Always Compatible)

Parts in the same series with different packages are always replacement-compatible:

• FT232RL <==> FT232RQ (same chip, different package)
• FT2232H <==> FT2232D (same functionality)

X-Series UART Upgrade Path

X-series variants can replace each other in one direction (more pins = superset):

FT230X (0 control lines) <-- FT231X (2: RTS/CTS) <-- FT234X (4: +DTR/DSR)

• FT234X can replace FT231X or FT230X (superset)
• FT231X can replace FT230X
• Downgrade is NOT valid (FT230X cannot replace FT231X)

NOT Compatible

• FT2232 vs FT4232 - Different channel count
• FT600 vs FT601 - Different bus width (16-bit vs 32-bit)
• FT232 vs FT2232 - Different channel count

Helper Methods (FTDI-Specific)

The FTDIHandler provides additional helper methods:

getInterfaceType(mpn)

Returns the USB interface type:

getChannelCount(mpn)

Returns number of channels (1, 2, or 4):

• FT232, FT23xX, FT2xxX, FT260 -> 1
• FT2232, FT600 -> 2
• FT4232 -> 4

getUsbVersion(mpn)

Returns USB version string:

• "USB 2.0 Full-Speed" - Most single-channel devices
• "USB 2.0 High-Speed" - FT2232H, FT4232H
• "USB 3.0 Super-Speed" - FT600, FT601

Example MPNs

Handler Implementation Notes

Pattern Matching Order

The handler defines explicit pattern checks in matches() for each family:

// Pattern order in matches():
1. FT232 series:   "^FT232[A-Z]{0,2}.*"
2. FT2232 series:  "^FT2232[A-Z]?.*"
3. FT4232 series:  "^FT4232[A-Z]?.*"
4. X-series UART:  "^FT23[0-9]X[A-Z]?.*"
5. USB to I2C:     "^FT20[0-1]X[A-Z]?.*"
6. USB to SPI:     "^FT22[0-1]X[A-Z]?.*"
7. FT240X FIFO:    "^FT240X[A-Z]?.*"
8. FT260:          "^FT260[A-Z]?.*"
9. USB 3.0:        "^FT60[0-1][A-Z]?.*"
10. FT51A MCU:     "^FT51[A-Z].*"
11. Android AOA:   "^FT31[1-2]D.*"
12. FT120:         "^FT12[0-2].*"
13. EVE:           "^FT8[0-1][0-9].*"

Handler Characteristics

• Uses Set.of() for getSupportedTypes() (correct, immutable)
• Overrides matches() with explicit pattern checks (avoids cross-handler issues)
• Returns empty set for getManufacturerTypes() (no manufacturer-specific types defined)
• Uses Map.ofEntries() for PACKAGE_CODES (correct, immutable)

Related Files

• Handler: manufacturers/FTDIHandler.java
• Component types: Only ComponentType.IC (no FTDI-specific types)
• Tests: Should be in handlers/FTDIHandlerTest.java (not manufacturers package)

Learnings & Edge Cases

• Single ComponentType: FTDI only supports IC - there are no manufacturer-specific types like USB_BRIDGE_FTDI. All FTDI products are ICs.
• X in series name: The "X" in FT230X/FT231X/etc. is part of the series name, not a package suffix. Package code comes AFTER the X.
• Package suffix after X: For X-series devices, the package code is the letter immediately following "X" (e.g., FT230XS = SSOP).
• Two-letter package codes: Some package codes are two letters (RL, RQ, BL, BQ). Check longer codes before shorter ones.
• -R suffix ambiguity: "-R" at the end typically means tape and reel (shortened from -REEL), but should be stripped before package extraction.
• FT600 vs FT601: Different bus widths (16-bit vs 32-bit), NOT interchangeable despite similar names.
• FT8xx series: These are EVE (Embedded Video Engine) display controllers, NOT USB bridge chips. Different product category entirely.
• HID-class FT260: The FT260 is unique - it's a HID-class device (no driver needed on most OS), supporting both I2C and UART.
• H suffix meaning: "H" after series number typically means High-Speed USB 2.0 (480 Mbps), e.g., FT2232H, FT4232H.
• USB 3.0 devices (FT600/FT601): Use BL/BQ package suffixes, not the standard single-letter codes.