Cantara/logicic

Logic IC Manufacturer Skill

Overview

Logic ICs are standardized digital integrated circuits implementing basic logic functions. The two main families are:

1. 74xx Series - TTL-based logic (originally Texas Instruments, now multi-source)
2. CD4xxx Series - CMOS-based logic (originally RCA, now multi-source)

These parts are produced by multiple manufacturers (TI, ON Semi, Nexperia, Diodes Inc, STMicroelectronics) with identical pinouts and functions.

---

MPN Structure

74xx Series

[PREFIX][FAMILY][SERIES][FUNCTION][PACKAGE]
   |       |       |        |         |
   |       |       |        |         +-- Package code (N, D, PW, etc.)
   |       |       |        +-- Function number (00, 04, 74, 138, etc.)
   |       |       +-- Fixed: "74" (commercial) or "54" (military temp)
   |       +-- Technology family (LS, HC, HCT, AC, AHC, etc.)
   +-- Optional manufacturer prefix (SN for TI)

Example Decoding

SN74HC595N
|  |  |  ||
|  |  |  |+-- N = DIP package
|  |  |  +-- 595 = 8-bit shift register function
|  |  +-- 74 = Commercial temperature range
|  +-- HC = High-speed CMOS family
+-- SN = Texas Instruments prefix

74LS04D
  |  ||
  |  |+-- D = SOIC package
  |  +-- 04 = Hex inverter function
  +-- LS = Low-power Schottky TTL family

CD4xxx Series

CD[FUNCTION][PACKAGE]
|     |         |
|     |         +-- Package suffix (BE, BM, UBE, etc.)
|     +-- Function number (4001, 4017, 4051, etc.)
+-- CD = CMOS Digital prefix

Example Decoding

CD4017BE
|  |   ||
|  |   |+-- E = Economy grade
|  |   +-- B = Buffered output
|  +-- 4017 = Decade counter/divider function
+-- CD = CMOS Digital prefix

CD4001UBE
|  |   |||
|  |   ||+-- E = Economy grade
|  |   |+-- B = Buffered
|  |   +-- U = Unbuffered variant
|  +-- 4001 = Quad 2-input NOR gate
+-- CD = CMOS Digital prefix

---

Technology Families (74xx Series)

Original TTL Technologies

| Family | Name | Speed | Power | Supply | Notes | |--------|------|-------|-------|--------|-------| | (none) | Standard TTL | Slow | High | 5V | Original, obsolete | | L | Low-power TTL | Slow | Low | 5V | Obsolete | | S | Schottky TTL | Fast | High | 5V | Obsolete | | LS | Low-power Schottky | Fast | Low | 5V | Still common | | ALS | Advanced LS | Faster | Lower | 5V | Improved LS | | F | Fast TTL | Very Fast | Medium | 5V | High-speed apps | | AS | Advanced Schottky | Very Fast | High | 5V | Maximum speed |

CMOS Technologies (Modern)

| Family | Name | Speed | Power | Supply | Notes | |--------|------|-------|-------|--------|-------| | C | CMOS | Slow | Very Low | 3-15V | Wide voltage range | | HC | High-speed CMOS | Fast | Very Low | 2-6V | Most common today | | HCT | HC TTL-compatible | Fast | Very Low | 4.5-5.5V | 5V TTL I/O levels | | AC | Advanced CMOS | Very Fast | Low | 2-6V | High-speed CMOS | | ACT | AC TTL-compatible | Very Fast | Low | 4.5-5.5V | Fast + TTL levels | | AHC | Advanced HC | Faster | Very Low | 2-5.5V | Improved HC | | AHCT | AHC TTL-compatible | Faster | Very Low | 4.5-5.5V | Improved HCT |

Low-Voltage Technologies

| Family | Name | Speed | Supply | Notes | |--------|------|-------|--------|-------| | LV | Low Voltage | Medium | 2-5.5V | General low-voltage | | LVC | LV CMOS | Fast | 1.65-5.5V | Common in 3.3V systems | | LVT | LV TTL | Fast | 2.7-3.6V | 3.3V optimized | | ALVC | Advanced LVC | Very Fast | 1.65-3.6V | High-speed 3.3V | | AUC | Advanced ULP | Fast | 0.8-2.7V | Ultra-low voltage | | AUP | Advanced ULP | Medium | 0.8-3.6V | Ultra-low power |

Technology Selection Guide

| Use Case | Recommended Family | |----------|-------------------| | New 5V design | HC or HCT | | Replacing old TTL | HCT (input compatible) | | 3.3V systems | LVC | | Mixed 3.3V/5V | LVC (5V tolerant) | | Low power battery | AUP, HC | | High speed | AC, AHC, ALVC | | Wide voltage range | CD4000 series |

---

Function Number Reference

Gates (2-digit)

| Number | Function | Gates/Package | |--------|----------|---------------| | 00 | Quad 2-input NAND | 4 | | 02 | Quad 2-input NOR | 4 | | 04 | Hex inverter | 6 | | 08 | Quad 2-input AND | 4 | | 10 | Triple 3-input NAND | 3 | | 11 | Triple 3-input AND | 3 | | 20 | Dual 4-input NAND | 2 | | 21 | Dual 4-input AND | 2 | | 27 | Triple 3-input NOR | 3 | | 30 | 8-input NAND | 1 | | 32 | Quad 2-input OR | 4 | | 86 | Quad 2-input XOR | 4 | | 125 | Quad bus buffer (tri-state) | 4 | | 126 | Quad bus buffer (tri-state) | 4 |

Flip-Flops

| Number | Function | Flip-Flops/Package | |--------|----------|-------------------| | 73 | Dual J-K flip-flop (clear) | 2 | | 74 | Dual D flip-flop (preset/clear) | 2 | | 75 | Quad bistable latch | 4 | | 76 | Dual J-K flip-flop (preset/clear) | 2 | | 109 | Dual J-K flip-flop (positive edge) | 2 | | 112 | Dual J-K flip-flop (negative edge) | 2 | | 174 | Hex D flip-flop (common clear) | 6 | | 175 | Quad D flip-flop (common clear) | 4 | | 273 | Octal D flip-flop (common clear) | 8 | | 374 | Octal D flip-flop (tri-state) | 8 | | 574 | Octal D flip-flop (tri-state, edge) | 8 |

Counters

| Number | Function | |--------|----------| | 90 | Decade counter | | 93 | 4-bit binary counter | | 160 | Sync decade counter (async clear) | | 161 | Sync 4-bit counter (async clear) | | 163 | Sync 4-bit counter (sync clear) | | 190 | Sync decade up/down counter | | 191 | Sync binary up/down counter | | 393 | Dual 4-bit binary counter | | 4017 | CD4017 decade counter/divider | | 4040 | CD4040 12-bit binary counter |

Shift Registers

| Number | Function | Bits | |--------|----------|------| | 164 | 8-bit serial-in parallel-out | 8 | | 165 | 8-bit parallel-in serial-out | 8 | | 166 | 8-bit parallel-in serial-out | 8 | | 595 | 8-bit serial-in parallel-out (latch) | 8 | | 597 | 8-bit serial-in parallel-out (latch) | 8 | | 4015 | CD4015 dual 4-bit shift register | 2x4 | | 4094 | CD4094 8-bit shift register | 8 |

Decoders/Demultiplexers

| Number | Function | |--------|----------| | 42 | BCD to decimal decoder | | 138 | 3-to-8 line decoder | | 139 | Dual 2-to-4 line decoder | | 154 | 4-to-16 line decoder | | 155 | Dual 2-to-4 decoder/demux | | 238 | 3-to-8 line decoder (active high) | | 4028 | CD4028 BCD to decimal decoder | | 4514 | CD4514 4-to-16 line decoder (latch) |

Multiplexers

| Number | Function | |--------|----------| | 151 | 8-to-1 multiplexer | | 153 | Dual 4-to-1 multiplexer | | 157 | Quad 2-to-1 multiplexer | | 158 | Quad 2-to-1 multiplexer (inverted) | | 251 | 8-to-1 multiplexer (tri-state) | | 253 | Dual 4-to-1 multiplexer (tri-state) | | 257 | Quad 2-to-1 multiplexer (tri-state) | | 4051 | CD4051 8-channel analog mux | | 4052 | CD4052 Dual 4-channel analog mux | | 4053 | CD4053 Triple 2-channel analog mux |

Buffers/Drivers

| Number | Function | |--------|----------| | 07 | Hex buffer (open-collector) | | 17 | Hex buffer (open-collector) | | 125 | Quad buffer (tri-state) | | 126 | Quad buffer (tri-state) | | 240 | Octal buffer (inverting, tri-state) | | 241 | Octal buffer (non-inverting, tri-state) | | 244 | Octal buffer (non-inverting, tri-state) | | 245 | Octal bus transceiver (tri-state) | | 4049 | CD4049 Hex inverting buffer | | 4050 | CD4050 Hex non-inverting buffer |

---

Package Codes

74xx Series Package Codes

| Code | Package | Pins | Notes | |------|---------|------|-------| | N | PDIP | 14-20 | Through-hole, prototyping | | D | SOIC | 14-20 | Surface mount, 1.27mm pitch | | DW | SOIC-Wide | 16-28 | Wide body SOIC | | PW | TSSOP | 14-24 | Thin profile, 0.65mm pitch | | DB | SSOP | 14-28 | Shrink SOIC | | DBV | SOT-23 | 5-6 | Very small, single gate | | DGV | VSSOP | 8 | Mini SOIC | | RGY | QFN | 16-24 | No-lead package | | NS | SO | 14-20 | Small outline | | M | SOIC | 14-20 | Alternative SOIC code | | T | TSSOP | 14-24 | Alternative TSSOP code | | P | DIP | 14-20 | Plastic DIP (alternate) |

CD4xxx Series Package Codes

| Code | Package | Notes | |------|---------|-------| | BE | PDIP | Standard plastic DIP, buffered | | B | PDIP | Standard buffered output | | E | PDIP | Economy grade | | UBE | PDIP | Unbuffered output | | BC | CERDIP | Ceramic DIP (high reliability) | | BM | SOIC | Surface mount, buffered | | BT | TSSOP | Thin package, buffered | | BD | SOIC | Alternative SOIC code | | PWR | TSSOP | Tape and reel | | N | DIP | Generic DIP | | P | DIP | Plastic DIP | | NSR | SOIC | SOIC tape and reel |

---

Handler Implementation

Supported Component Types

ComponentType.IC         // Base type
ComponentType.LOGIC_IC   // Specific logic IC type

Pattern Recognition

// 74xx series pattern (includes 54xx military)
"^(?:74|54)[LSAHCTTF]{0,4}[0-9]{2,4}.*"

// CD4xxx series pattern
"^CD4[0-9]{3}.*"

Series Extraction Rules

The handler extracts the base series by:

1. 74xx: Extracts digits after technology code until non-digit

   • SN74HC595N -> 595
   • 74LS04D -> 04

2. CD4xxx: Extracts CD4 + 3-digit function

   • CD4017BE -> CD4017
   • CD4001UBE -> CD4001

Package Code Extraction Rules

CD4xxx:

• Check longest suffixes first: UBE, BE, BC
• Then shorter: B, E

74xx:

• Single letter suffix: N, D, P, M, T
• Pattern: .*?([NDPMT])$

---

Similarity Calculation

The LogicICSimilarityCalculator uses these rules:

Same Function, Compatible Technology = HIGH (0.9)

// These are highly similar (same function)
"74LS00" vs "74HC00"    // 0.9 - Same NAND function
"74LS04" vs "74ALS04"   // 0.9 - Same inverter function
"CD4001BE" vs "CD4001BM" // 0.9 - Same NOR gate, different package

Different Functions = LOW (0.3)

// These have low similarity (different functions)
"74LS00" vs "74LS04"    // 0.3 - NAND vs Inverter
"74HC595" vs "74HC138"  // 0.3 - Shift register vs Decoder
"CD4017" vs "CD4001"    // 0.3 - Counter vs NOR gate

Compatible Technology Groups

These 74xx families are considered compatible:

• LS, ALS, F, HC, HCT

Parts with the same function and compatible families score HIGH similarity.

Function Groups

Parts in the same function group may have increased similarity:

| Group | Function Numbers | |-------|-----------------| | NAND | 00, 10, 20, 30, 40 | | NOR | 02, 12, 22, 32, 42 | | NOT | 04, 14, 24, 34, 44 | | AND | 08, 18, 28, 38, 48 | | OR | 32, 42 | | Flip-Flops | 73, 74, 75, 76, 77, 78 | | Multiplexers | 151, 153, 157, 158 | | Decoders | 138, 139, 154, 155 |

---

Example MPNs

Texas Instruments (SN prefix)

| MPN | Description | |-----|-------------| | SN74HC595N | 8-bit shift register, HC CMOS, DIP | | SN74LS04D | Hex inverter, LS TTL, SOIC | | SN74AHC1G04DCKR | Single inverter, AHC, SC70, tape/reel | | SN74LVC245APW | Octal bus transceiver, LVC, TSSOP | | SN74HC138D | 3-to-8 decoder, HC CMOS, SOIC |

Nexperia (74 prefix without SN)

| MPN | Description | |-----|-------------| | 74HC595D | 8-bit shift register, HC, SOIC | | 74LVC1G04GW | Single inverter, LVC, SC70 | | 74AHCT125D | Quad buffer, AHCT, SOIC | | 74HCT245D | Octal bus transceiver, HCT, SOIC |

ON Semiconductor (MC74 prefix)

| MPN | Description | |-----|-------------| | MC74HC595ADG | 8-bit shift register, HC, SOIC | | MC74AC04DG | Hex inverter, AC, SOIC | | MC74VHC1GT04DTT1G | Single inverter, VHC, SC70 |

CD4000 Series (Multi-source)

| MPN | Description | |-----|-------------| | CD4001BE | Quad 2-input NOR, buffered, DIP | | CD4017BM | Decade counter, buffered, SOIC | | CD4051BE | 8-channel mux, buffered, DIP | | CD4066BM | Quad bilateral switch, buffered, SOIC | | CD4093BE | Quad Schmitt NAND, buffered, DIP |

---

Multi-Sourcing Guide

Logic ICs are second-sourced by many manufacturers. These are direct replacements:

| Function | TI | Nexperia | ON Semi | STMicro | |----------|----|---------:|---------|---------| | 74HC595 | SN74HC595 | 74HC595 | MC74HC595A | M74HC595 | | 74LS04 | SN74LS04 | 74LS04 | MC74LS04A | - | | 74HC138 | SN74HC138 | 74HC138 | MC74HC138A | M74HC138 | | CD4001 | CD4001B | HEF4001B | MC14001B | HCF4001 | | CD4017 | CD4017B | HEF4017B | MC14017B | HCF4017 |

Note: Nexperia uses HEF prefix for CD4000 series (e.g., HEF4001BT). STMicro uses HCF prefix (e.g., HCF4017BE). ON Semiconductor uses MC14 prefix (e.g., MC14001BCP).

---

Related Files

• Handler: manufacturers/LogicICHandler.java
• Similarity Calculator: componentsimilaritycalculators/LogicICSimilarityCalculator.java
• Component Types: ComponentType.LOGIC_IC, ComponentType.LOGIC_IC_NEXPERIA, ComponentType.LOGIC_IC_DIODES
• Similarity Skill: .claude/skills/similarity-logic/SKILL.md

---

Learnings & Quirks

Handler Patterns

• Pattern uses character class: [LSAHCTTF]{0,4} captures technology but has duplicates (TT). Works but could be cleaner.
• 54xx military parts: Pattern includes 54xx prefix for military temperature range variants. Same function as 74xx.
• No manufacturer prefix required: Pattern matches both SN74HC595 (TI) and 74HC595 (generic).

Series Extraction Gotcha

• The extractSeries() method uses regex replaceAll("([0-9]{2,4}).*$", "$1") which captures the function number.
• For 74LS04D, this extracts 04 (correct).
• For 74HC595N, this extracts 595 (correct).
• Note: Technology prefix (LS, HC) is NOT included in extracted series.

Package Code Order Matters

// CORRECT - Check longer suffixes first
if (mpn.endsWith("UBE")) return "UBE";  // 3 chars first
if (mpn.endsWith("BE")) return "BE";    // 2 chars second
if (mpn.endsWith("B")) return "B";      // 1 char last

// WRONG - Would never match UBE or BE
if (mpn.endsWith("E")) return "E";      // Matches first!

CD4000 Buffered vs Unbuffered

• B suffix: Buffered output (higher drive, lower speed)
• UB suffix: Unbuffered output (faster, lower drive)
• Most modern designs use buffered versions.

74xx vs CD4000 Comparison

| Aspect | 74xx (CMOS) | CD4000 | |--------|-------------|--------| | Supply Voltage | 2-6V (HC) | 3-15V | | Speed | Faster | Slower | | Power | Low | Very Low | | Output Drive | Higher | Lower | | ESD Tolerance | Lower | Higher | | Noise Immunity | Good | Excellent |

Technology Selection for Mixed Voltage

| Source Logic | Target Logic | Use Family | |--------------|--------------|------------| | 5V TTL | 3.3V CMOS | LVC (5V tolerant inputs) | | 3.3V CMOS | 5V TTL | HCT (TTL output levels) | | 3.3V to 5V bidirectional | - | 74LVC245 (transceiver) |

Debug Statements in Calculator

The LogicICSimilarityCalculator contains System.out.println debug statements (lines 43, 47, 51, 59, 67, 78, 92, 113-123). These should be removed or replaced with SLF4J logging in production.

Cross-Handler Considerations

• LogicICHandler handles generic logic ICs (74xx, CD4xxx).
• Manufacturer-specific handlers (TI, Nexperia, etc.) may also match these parts.
• Handler ordering in ManufacturerHandlerFactory affects which handler processes the part first.

<!-- Add new learnings above this line -->