LTC487

4

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 4 outputs enabled. See

Function Table for details.

DO4B (Pin 13): Driver 4 output.

DO4A (Pin 14): Driver 4 output.

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

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.

PI

FU C

S

TI

INPUT

ENABLES

OUTPUTS

DI

EN12 or EN34

OUT A

OUT B

HH

H

L

LH

L

H

XL

Z

Z

FU CTI

TABLE

Figure 2. Driver Enable and Disable Times

H: High Level

L: Low Level

X: Irrelevant

Z: High Impedance (Off)

TI E WAVEFOR

S

G

WITCHI

S

Figure 1. Driver Propagation Delays

LTC487 • TA06

A, B

EN12

3V

0V

f = 1MHz : t

10ns : t

10ns

1.5V

1.5V

5V

OUTPUT NORMALLY LOW

t

ZL

2.3V

t

LZ

0.5V

≤≤

A, B

0V

t

ZH

2.3V

OUTPUT NORMALLY HIGH

t

HZ

0.5V

rf

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

<<

rf