LTC485CS8 Linear Technology, LTC485CS8 Datasheet - Page 7

• 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

SWITCHING TIME WAVEFORMS
FUNCTION TABLES
LTC485 Transmitting
RE
A, B
INPUTS
A, B
A, B
RE
DI
–V
R
R
R
V
DE
V
V
1
1
0
1
V
OD2
OD2
V
3V
0V
5V
0V
OH
3V
0V
5V
OH
0V
OL
OL
DI
1
0
CONDITION
N F
N F
LINE
F
t
t
t
Figure 8. Receiver Enable and Disable Times
Figure 6. Driver Enable and Disable Times
t
Figure 7. Receiver Propagation Delays
t
t
t
ZH
t
ZL
PHL
ZH
ZL
B
0
1
OUTPUTS
1.5V
1.5V
0V
2.3V
2.3V
1.5V
1.5V
1.5V
A
1
0
f = 1MHz, t
f = 1MHz, t
f = 1MHz, t
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
LTC485 Receiving
r
r
r
≤ 10ns, t
≤ 10ns, t
≤ 10ns, t
OUTPUT
INPUT
RE
0
0
0
1
f
f
f
≤ 10ns
≤ 10ns
≤ 10ns
t
t
t
LZ
t
HZ
t
HZ
LZ
PLH
INPUTS
DE
0
0
0
0
1.5V
1.5V
0.5V
0.5V
0.5V
0.5V
1.5V
Inputs Open
≤ –0.2V
A – B
0.2V
X
LTC485
485 F08
485 F07
485 F06
OUTPUTS
R
1
0
1
Z
7
485fh