Symbols

• All symbols need >Name (on the Names layer). Size: 0.07 Ratio: 8% Font: Vector
• All symbols need >Value (on the Values layer). Size: 0.07 Ratio: 8% Font: Vector
• Symbol Names
  • Should be the most basic name which can describe the component- reserve part numbers for technologies under the device (if applicable).
  • Center names/values on top/bottom of symbol for resistors, capacitors.
  • Headers.
    • Name position: origin point bottom left, X:-0.1, Y:0.12 (this ensures clearance from symbol outline wire - *and allows for a net to be drawn above with sufficient clearance)
    • Value position: origin point bottom left, X:-0.1, Y:.-0.19 (this ensures clearance from symbol outline wire - *and allows for a net to be drawn below with sufficient clearance)
• Pins
  • Group pins logically by function, or place them in the order they appear on the physical package.
  • Aim to use SHORT pins if possible (bump to MEDIUM if necessary).
  • Names should follow datasheet conventions set by the manufacturer.
  • Use an exclamation point to indicate active low signals- e.g., !RESET will produce a pin name with a bar over it. !R!/W will place a bar over the 'R' only.
  • Don't be afraid to use gates to divide large pin count packages into smaller groups when necessary.
• Symbol Origin:
  • Headers:
    • Centered (above/below)
    • Pin 1 at top, pins to the right
    • Cross-hairs should be centered on box
• Symbol Outline
  • Default to 0.01 for outline width
• Description
  • Use the following format:

<h3>[Manufacturer (if applicable)] [General Part Number (if applicable)] [Short Part Description (required)]</h3>
<p>[Few-sentence description of part(s)</p>
Example: SparkFun-DigitalIC - ATMEGA32U4
<h3>Atmel ATmega32U4 - 8-Bit Microcontroller w/ USB 2.0</h3>
<p>The low-power Atmel 8-bit AVR RISC-based microcontroller featuring 32KB self-programming flash 
program memory, 2.5KB SRAM, 1KB EEPROM, USB 2.0 full-speed/low speed device, 12-channel 10-bit A/D-converter, 
and JTAG interface for on-chip-debug. The device achieves up to 16 MIPS throughput at 16 MHz. 2.7 - 5.5 Volt operation. </p>