7400 Series ICs vs Logisim-evolution Components

If your lab course moves from simulation to a breadboard, you will meet the 7400 series: the classic TTL logic chips. Logisim-evolution ships a built-in TTL library containing faithful models of these chips, so you can prototype with the exact parts you will later wire by hand. Open the component explorer and look under TTL.

Chip-to-component map

Chip	Function	Logisim-evolution equivalent
7400	Quad 2-input NAND	TTL 7400, or NAND Gate (Gates library)
7402	Quad 2-input NOR	TTL 7402, or NOR Gate
7404	Hex inverter (NOT)	TTL 7404, or NOT Gate
7408	Quad 2-input AND	TTL 7408, or AND Gate
7432	Quad 2-input OR	TTL 7432, or OR Gate
7486	Quad 2-input XOR	TTL 7486, or XOR Gate
7410 / 7420	Triple 3-input / dual 4-input NAND	TTL 7410 / 7420, or NAND Gate with more inputs
7474	Dual D flip-flop	TTL 7474, or D Flip-Flop (Memory library)
7476	Dual JK flip-flop	TTL 7476, or J-K Flip-Flop
74161	4-bit synchronous counter	TTL 74161, or Counter (Memory library)
74194	4-bit universal shift register	TTL 74194
74283	4-bit full adder	TTL 74283, or Adder (Arithmetic library)
7447	BCD to 7-segment decoder/driver	TTL 7447, or 7-Segment Display + decoder logic
74138	3-to-8 decoder	TTL 74138, or Decoder (Plexers library)
74151	8-to-1 multiplexer	TTL 74151, or Multiplexer (Plexers library)
7485	4-bit magnitude comparator	TTL 7485, or Comparator (Arithmetic library)

Chip list verified against the TTL library shipped with Logisim-evolution v5.0.0.

Simulation-to-breadboard workflow

1. Prototype with the TTL parts (not the idealized Gates versions) so pin counts and behavior match the real chips.
2. Count pins: a 7400 holds four NAND gates — your design’s gate count tells you how many physical chips to buy.
3. Mind the power pins: real chips need VCC and GND wired; the simulator hides this, so add it to your wiring checklist.
4. Test vectors first: verify every input combination in the simulator before touching a wire — debugging is free in software.