User Manual

5
3.0.5 All outputs must be low impedance, with symmetric drive
characteristics (yields same performance when either sinking or
sourcing current.) The output impedance must be less than 100
ohms. This is typically achieved by using a buffer or follower circuit
at the output. Outputs must never be allowed to float. Outputs
must be rail-to-rail.
Figure 3: Example of an output stage, included in the Eagle templates
3.0.6 Polarity conventions must be observed unless otherwise specified.
If output polarity is inverted with respect to inputs and/or violates
reasonable expectations, consultation with littleBits for guidance is
required.
3.0.7 The design must faithfully execute the letter and intent of the PRD.
If there are any ambiguities, consultation with littleBits is required.
3.0.8 All ICs must have at least one 0.1 uF bypass capacitor on every
IC power supply. Some designs will require additional bypassing.