LTC487



487fc

pin FuncTions

DI1 (Pin 1): Driver 1 Input. If Driver 1 is enabled, then a

low on DI1 forces the driver outputs DO1A low and DO1B

high. A high on DI1 with the driver outputs enabled will

force DO1A high and DO1B low.

DO1A (Pin 2): Driver 1 Output.

DO1B (Pin 3): Driver 1 Output.

EN12 (Pin 4): Driver 1 and 2 Outputs Enabled. See Func-

tion Table for details.

DO2B (Pin 5): Driver 2 Output.

DO2A (Pin 6): Driver 2 Output.

DI2 (Pin 7): Driver 2 Input. Refer to DI1.

GND (Pin 8): GND Connection.

DI3 (Pin 9): Driver 3 Input. Refer to DI1.

DO3A (Pin 10): Driver 3 Output.

DO3B (Pin 11): Driver 3 Output.

EN34 (Pin 12): Driver 3 and 4Outputs Enabled. See Func-

tion Table for details.

DO4B (Pin 13): Driver 4 Output.

DO4A (Pin 14): Driver 4 Output.

DI4 (Pin 15): Driver 4 Input. Refer to DI1.

H: High Level

L: Low Level

X: Irrelevant

Z: High Impedance (Off)

INPUT

ENABLES

OUTPUTS

DI

EN12 or EN34

OUT A

OUT B

H

L

X

H

H

L

H

L

Z

L

H

Z

FuncTion Table

swiTching TiMe waveForMs

LTC487 • TA05

B

A

DI

3V

0V

1.5V

1.5V

V

= V(A) – V(B)

80%

20%

90%

DIFF

10%

f = 1MHz : t

10ns : t

10ns

<

<

r

f

LTC487 • TA06

A, B

EN12

3V

0V

f = 1MHz : t

10ns : t

10ns

1.5V

1.5V

5V

OUTPUT NORMALLY LOW

2.3V

0.5V

≤

≤

A, B

0V

2.3V

OUTPUT NORMALLY HIGH

0.5V

r

f

Figure 2. Driver Enable and Disable Times

Figure 1. Driver Propagation Delays