Datasheet

LTC487
5
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 4 Outputs 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.
V
CC
(Pin 16): Positive Supply; 4.75 < V
CC
< 5.25.
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
–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
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
Figure 2. Driver Enable and Disable Times
Figure 1. Driver Propagation Delays