Analog Integrated Circuit Device Data

12

Freescale Semiconductor

33886

ELECTRICAL CHARACTERISTICS

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 (27)

X

X

X

X

L

Z

Z

Overtemperature (28)

X

X

X

X

L

Z

Z

Short Circuit (28)

X

X

X

X

L

Z

Z

Notes

27.

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

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

28.

When a short-circuit or over-temperature 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.