LP3929 Datasheet, PDF (5/14 Pages) National Semiconductor (TI) – High Speed Bi-Directional Level Shifter and Ultra Low-Dropout CMOS Voltage Regulator and Line

TABLE 1. Operation Modes
Inputs
Mode
EN CMD_DIR DIR_0 DIR_1-3
L
X
X
X Level shifter / LDO = off (Shutdown Mode)
H
L
L
L _{All channels (D0-D3 and CMD): B → A Direction}
H
L
L
H _{A → B Direction: D1-D3, B → A Direction: CMD and D0}
H
L
H
L _{A → B Direction: D0, B → A Direction: CMD and D1-D3}
H
L
H
H _{A → B Direction: D0-D3, B → A Direction: CMD}
H
H
L
L _{A → B Direction: CMD, B → A Direction: D0-D3}
H
H
L
H _{A → B Direction: CMD and D1-D3, B → A Direction: D0}
H
H
H
L _{A → B Direction: CMD and D0, B → A Direction: D1-D3}
H
H
H
H _{All channels (D0-D3 and CMD): A → B Direction}
H = V_DDA, L = V_SS
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