The ☒CHIPs comes in unit sizes. 1 unit size or 1U x 1U (or 1x1U) is 16mm x 16mm (or 16x16mm). A 1x2U is therefore 16x32mm and 2x4U is 32x64mm. The current version of the ☒CHIPs has a minimum size of 2U and subsequent sizes are divisible with 2U, so 2x2U, 2x4U, 4x4U, 2x6U, 4x6U, etc.
There is a ☒BUS connection typically for each 2U side, so a 2x2U will have 4 ☒BUS connections, a 4x4U will have 8 ☒BUS connections, and a 2x6U will have 8 ☒BUS connections. Note, not all ☒CHIPs will have ☒BUS connections all around the ☒CHIP. When a special connector has to be used, such as antenna connector or screw terminal, a ☒BUS connection will be sacrifices to give space for such connector. From time to time a ☒CHIP might be just too small to contain the circuitry, so instead of going to the next side in U, a design which sacrifices a ☒BUS in order to allow room for the components, has been chosen.
Each ☒CHIP has been shortened on all sides with 0.1 mm in order to allow space for interconnecting the chips. This shortening is on the total ☒CHIP, not per U, so a 2x2U is 31.8x31.8mm and a 2x6U is 31.8x95.8mm.
|☒CHIP||Allocated size||Actual size||Max. ☒BUS connections|
A 4x4 LEGO™ brick has same dimensions as a 2x2U ☒CHIP
The net weight of the ☒CHIP, excluding packaging, ☒BUS connectors, batteries, external antennas, etc.
The net weight is in grams (g).
The height is indicated in:
- Ht: The total height of PCB and all the components on the top and bottom of the PCB.
- Hts: The height of the tallest component on the top side of the PCB.
- Hbs: The height of the tallest component on the bottom side of the PCB.
The heights are all in mm.
- 7.8 mm total height, aka total thickness.
- 5.6 mm height from PCB to the tallest component - on the top side
- 0.6 mm height from PCB to the tallest component - on the bottom side
PCBs used is always 1.6 mm thick, so to verify the height: 7.8 = 5.6 + 1.6 + 0.6
- "Lego Design". Wikipedia.