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.
V
CC
(Pin 16):
Positive supply; 4.75 < V
CC
< 5.25.
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
U
FU
U
C
U
S
O
TI
INPUT
ENABLES
OUTPUTS
DI
EN12 or EN34
OUT A
OUT B
H
H
H
L
L
H
L
H
X
L
Z
Z
FU
U
C
UO
TI
TABLE
Figure 2. Driver Enable and Disable Times
H: High Level
L: Low Level
X: Irrelevant
Z: High Impedance (Off)
TI
W
E WAVEFOR
S
U
G
WITCHI
W
S
Figure 1. Driver Propagation Delays
LTC487 • TA06
A, B
EN12
3V
0V
f = 1MHz : t 10ns : t 10ns
V
OL
V
OH
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
r
f
–V
O
LTC487 • TA05
B
A
DI
V
O
1/2 V
O
3V
0V
t
SKEW
1.5V
t
PLH
1.5V
t
PHL
1/2 V
O
V = V(A) – V(B)
V
O
80%
20%
t
f
90%
DIFF
10%
t
SKEW
t
r
f = 1MHz : t 10ns : t 10ns
<
<
r
f