Datasheet

LTC485
2
485fk
For more information www.linear.com/LTC485
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
Supply Voltage ..........................................................12V
Control Input Voltages .....................–0.5V to V
CC
+ 0.5V
Driver Input Voltage .........................–0.5V to V
CC
+ 0.5V
Driver Output Voltage .............................................. ±14V
Receiver Input Voltage ............................................±14V
Receiver Output Voltages ................ –0.5V to V
CC
+ 0.5V
Operating Temperature Range
LTC485I......................................... –40°C ≤ T
A
≤ 85°C
LTC485C
........................................... 0°C ≤ T
A
≤ 70°C
LTC485M..................................... –55°C ≤ T
A
≤ 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
N8 PACKAGE
8-LEAD PLASTIC DIP
1
2
3
4
8
7
6
5
TOP VIEW
V
CC
B
A
GND
S8 PACKAGE
8-LEAD PLASTIC SOIC
R
D
RO
RE
DE
DI
J8 PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 125°C, θ
JA
= 100°C/W (N)
T
JMAX
= 150°C, θ
JA
= 150°C/W (S)
T
JMAX
= 155°C, θ
JA
= 100°C/W (J)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC485CN8#PBF NA LTC485CN8 8-Lead Plastic DIP 0°C to 70°C
LTC485CS8#PBF LTC485CS8#TRPBF 485 8-Lead Plastic SOIC 0°C to 70°C
LTC485IN8#PBF NA LTC485IN8 8-Lead Plastic DIP –40°C to 85°C
LTC485IS8#PBF LTC485IS8#TRPBF 485I 8-Lead Plastic SOIC –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC485CN8 NA LTC485CN8 8-Lead Plastic DIP 0°C to 70°C
LTC485CS8 LTC485CS8#TR 485 8-Lead Plastic SOIC 0°C to 70°C
LTC485IN8 NA LTC485IN8 8-Lead Plastic DIP –40°C to 85°C
LTC485IS8 LTC485IS8#TR 485I 8-Lead Plastic SOIC –40°C to 85°C
LTC485MJ8 NA LTC485MJ8 8-Lead Ceramic DIP –55°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OD1
Differential Driver Output Voltage (Unloaded) I
O
= 0
l
5 V
V
OD2
Differential Driver Output Voltage (with Load) R = 50Ω (RS422)
R = 27Ω (RS485), Figure 1
l
l
2
1.5 5
V
V
ΔV
OD
Change in Magnitude of Driver Differential
Output Voltage for Complementary States
R = 27Ω or R = 50Ω, Figure 1
l
0.2 V
V
OC
Driver Common Mode Output Voltage R = 27Ω or R = 50Ω, Figure 1
l
3 V
Δ|V
OC
| Change in Magnitude of Driver Common Mode
Output Voltage for Complementary States
R = 27Ω or R = 50Ω, Figure 1
l
0.2 V
V
IH
Input High Voltage DE, DI, RE
l
2 V
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V ±5%, unless otherwise noted. (Notes 2 and 3)