Analog Integrated Circuit Device Data

12

Freescale Semiconductor

33886

TYPICAL SWITCHING WAVEFORMS

Table 5. Truth Table

H = High, X = High or Low, and Z = High impedance (all output power transistors are switched off).

Device State

Input Conditions

Fault Status

Flag

Output States

D1

D2

IN1

IN2

FS

OUT1

OUT2

Forward

L

H

H

L

H

H

L

Reverse

L

H

L

H

H

L

H

Freewheeling Low

L

H

L

L

H

L

L

Freewheeling High

L

H

H

H

H

H

H

Disable 1 (D1)

H

X

X

X

L

Z

Z

Disable 2 (D2)

X

L

X

X

L

Z

Z

IN1 Disconnected

L

H

Z

X

H

H

X

IN2 Disconnected

L

H

X

Z

H

X

H

D1 Disconnected

Z

X

X

X

L

Z

Z

D2 Disconnected

X

Z

X

X

L

Z

Z

Undervoltage (28)

X

X

X

X

L

Z

Z

Overtemperature (29)

X

X

X

X

L

Z

Z

Short Circuit (29)

X

X

X

X

L

Z

Z

Notes

28.

In the case of an undervoltage condition, the outputs tri-state and the fault status is set logic Low. Upon undervoltage recovery, fault

status is reset automatically or automatically cleared and the outputs are restored to their original operating condition.

29.

When a short circuit or overtemperature condition is detected, the power outputs are tri-state latched-OFF independent of the input

signals and the fault status flag is set logic Low.