LTC1685 Linear Technology, LTC1685 Datasheet - Page 7

• Manufacturer Part Number: LTC1685
• Description: 52Mbps/ Precision Delay/ RS485 Fail-Safe Transceiver
• Manufacturer: Linear Technology

SWITCHI G TI E WAVEFOR S
DI
A – B
A, B
A, B
DE
RO
RO
RO
RE
–V
–V
V
V
V
V
V
OD2
OD2
3V
0V
V
0V
3V
0V
5V
OH
0V
U
OL
OH
3V
0V
5V
0V
OL
B
A
O
O
W
V
O
1/2 V
O
t
10%
Figure 8. Receiver Enable and Disable Times
r
Figure 6. Driver Enable and Disable Times
t
t
ZH
t
ZL
Figure 7. Receiver Propagation Delays
t
1.5V
t
PHL
ZH
ZL
Figure 5. Driver Propagation Delays
W
90%
t
PLH
t
1.5V
SKEW
1.5V
2.5V
2.5V
0V
2.5V
2.5V
f = 1MHz, t
2.5V
f = 1MHz, t
f = 1MHz, t
f = 1MHz, t
V
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
DIFF
r
= V(A) – V(B)
3ns, t
r
r
r
f
3ns, t
OUTPUT
3ns, t
3ns, t
INPUT
3ns
f
f
f
3ns
3ns
3ns
t
PHL
t
t
t
t
t
HZ
LZ
t
LZ
HZ
f
PLH
1.5V
90%
1.5V
1.5V
10%
0.5V
0.5V
0.5V
0.5V
t
SKEW
2.5V
1/2 V
O
LTC1685
1586 F05
1686 F06
1686 F07
1685 F08
7