LTC485CS8 Linear Technology, LTC485CS8 Datasheet - Page 6

• Manufacturer Part Number: LTC485CS8
• Description: IC TXRX INTRFC RS485 LOPWR 8SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LTC485CS8

• Number Of Drivers/receivers: 1/1
• Protocol: RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC485
TEST CIRCUITS
SWITCHING TIME WAVEFORMS
6
DI
3V
Figure 3. Driver/Receiver Timing Test Circuit
DE
DI
–V
A
B
3V
0V
V
0V
B
A
O
O
Figure 1. Driver DC Test Load
A
B
V
R
OD
DIFF
485 F01
R
R
C
C
V
L1
L2
O
1/2 V
V
OC
A
B
O
t
10%
r
1.5V
Figure 5. Driver Propagation Delays
RE
80%
15pF
t
PLH
t
SKEW
RO
485 F03
f = 1MHz, t
V
r
DIFF
≤ 10ns, t
= V(A) – V(B)
f
≤ 10ns
RECEIVER
OUTPUT
UNDER TEST
OUTPUT
Figure 4. Driver Timing Test Load #2
Figure 2. Receiver Timing Test Load
t
PLH
TEST POINT
t
f
1.5V
C
15pF
RL
90%
20%
C
500
L
t
SKEW
1k
1/2 V
S1
S2
O
S1
S2
1k
485 F02
485 F05
485 F04
V
CC
V
CC
485fh