What’s on the Logic Families poster
A 5-row table: Family · Supply · Character.
Voltage compatibility matters more than raw speed on most boards.
- TTL, 74LS — 5 V — Historic, sinks input current
- CMOS, 4000 — 3 to 15 V — Very low static power, slow
- HC and HCT — 2 to 6 V — HCT accepts TTL levels
- LVCMOS — 1.8 to 3.3 V — Today's default on boards
- LVDS — Differential pair — Fast, quiet, point to point
Mixing families means checking four numbers: V_OH, V_IH, V_OL and V_IL. A valid high on one part may not be one on the next.
Questions about the Logic Families poster
- What’s on the Logic Families poster?
- A 5-row table: Family · Supply · Character. Voltage compatibility matters more than raw speed on most boards. TTL, 74LS — 5 V — Historic, sinks input current; CMOS, 4000 — 3 to 15 V — Very low static power, slow; HC and HCT — 2 to 6 V — HCT accepts TTL levels; LVCMOS — 1.8 to 3.3 V — Today's default on boards; LVDS — Differential pair — Fast, quiet, point to point. Mixing families means checking four numbers: V_OH, V_IH, V_OL and V_IL. A valid high on one part may not be one on the next.
- Who is the Logic Families poster for?
- Logic Families belongs to the Electrical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning digital logic can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Logic Families poster?
- Check it before mixing parts on a board: input and output thresholds must overlap. A wall chart earns its place by being glanceable from where the work is happening, so Logic Families belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
- What other posters go with Logic Families?
- Adders, Boolean Algebra and Counters & Registers sit alongside Logic Families in the Electrical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.AddersBoolean AlgebraCounters & Registers
- Is the Logic Families poster free to download and print?
- Yes. Logic Families downloads as a free PDF with no account, no email and no watermark, like everything else in the Electrical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Logic Families poster print at?
- Logic Families is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Logic Families loses nothing.Printing guide
Related posters
Charts that sit alongside Logic Families on the same wall.
Browse every Electrical Engineering poster, or start from the full catalogue.