User`s manual

RabbitFLEX User’s Manual www.rabbit.com 19
3.2.2.1 One-Transistor Cells
Figure 3.2 shows the complete layout of a one-transistor cell. A one-transistor cell can handle dig-
ital inputs, certain outputs, bidirectional logic and keypads. The one-transistor cells on connector
J4 can also be used as analog inputs.
Figure 3.2 One-Transistor Cell
3.2.2.2 Two-Transistor Cells
A two-transistor cell is required for all sourcing outputs and the 1 A sinking output. The two-transistor
cells on connector J3 can also be used as analog inputs. You can use any circuit that can be placed in a one-
transistor cell, but not vice-versa.
Figure 3.3 Two-Transistor Cell
R1
R2A
R2B
Q1B
Q1A
R7
C1
R5
R6
R3B R3A
R4B R4A
RV1
R9
BD
R15
R14A R14B
R13A R13B
AB
BC
AD
BC
AB DC
R8
R10
R11
R3A R3B
R7
C1
R5
R4A R4B
R6
R12A R12B
Q2A
Q2B
Q1A
Q1B
RV1