LTC485IS8 Linear Technology, LTC485IS8 Datasheet - Page 6
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LTC485IS8
Manufacturer Part Number
LTC485IS8
Description
IC TXRX INTRFC RS485 LOPWR 8SOIC
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet
1.LTC485CN8PBF.pdf
(14 pages)
Specifications of LTC485IS8
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC485IS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC485IS8#PBF
Manufacturer:
FAIRCHILD
Quantity:
22 500
Company:
Part Number:
LTC485IS8#TRPBF
Manufacturer:
LT
Quantity:
12 000
Part Number:
LTC485IS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
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