LTC485IS8 Linear Technology, LTC485IS8 Datasheet - Page 5

• Manufacturer Part Number: LTC485IS8
• Description: IC TXRX INTRFC RS485 LOPWR 8SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

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

TYPICAL PERFORMANCE CHARACTERISTICS
RO (Pin 1): Receiver Output. If the receiver output is en-
abled (RE low), then if A > B by 200mV, RO will be high.
If A < B by 200mV, then RO will be low.
RE (Pin 2): Receiver Output Enable. A low enables the
receiver output, RO. A high input forces the receiver output
into a high impedance state.
DE (Pin 3): Driver Outputs Enable. A high on DE enables
the driver output. A and B, and the chip will function as a
line driver. A low input will force the driver outputs into a
high impedance state and the chip will function as a line
receiver.
PIN FUNCTIONS
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
–50
Receiver |t
vs Temperature
–25
0
TEMPERATURE (°C)
PLH
25
– t
PHL
50
|
75
100
485 G10
125
5.4
4.8
4.2
3.6
3.0
2.4
1.8
1.2
0.6
0
–50
Driver Skew vs Temperature
–25
0
TEMPERATURE (°C)
25
DI (Pin 4): Driver Input. If the driver outputs are enabled
(DE high), then a low on DI forces the outputs A low and
B high. A high on DI with the driver outputs enabled will
force A high and B low.
GND (Pin 5): Ground Connection.
A (Pin 6): Driver Output/Receiver Input.
B (Pin 7): Driver Output/Receiver Input.
V
CC
50
(Pin 8): Positive Supply; 4.75 < V
75
100
485 G11
125
640
580
520
460
400
340
280
220
160
100
–50
Supply Current vs Temperature
–25
0
TEMPERATURE (°C)
DRIVER DISABLED
DRIVER ENABLED
25
CC
< 5.25.
50
LTC485
75
100
485 G12
5
485fh
125