Datasheet

2
LTC1485
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
WU
U
PACKAGE
/
O
RDER I FOR ATIO
(Note 1)
Supply Voltage (V
CC
) .............................................. 12V
Control Input Voltages ................... –0.5V to V
CC
+ 0.5V
Control Input Currents ........................ – 50mA to 50mA
Driver Input Voltages ..................... –0.5V to V
CC
+ 0.5V
Driver Input Currents .......................... – 25mA to 25mA
Driver Output Voltages ......................................... ±14V
Receiver Input Voltages ........................................ ±14V
Receiver Output Voltages .............. – 0.5V to V
CC
+ 0.5V
Operating Temperature Range
LTC1485C............................................... 0°C to 70°C
LTC1485I .......................................... – 40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OD1
Differential Driver Output Voltage (Unloaded) I
O
= 0 ● 5V
V
OD2
Differential Driver Output Voltage (With Load) R = 50Ω, (RS422) ● 2V
R = 27Ω, (RS485) (Figure 1) ● 1.5 5 V
∆V
OD
Change in Magnitude of Driver Differential R = 27Ω or R = 50Ω (Figure 1) ● 0.2 V
Output Voltage for Complementary Output States
V
OC
Driver Common-Mode Output Voltage R = 27Ω or R = 50Ω (Figure 1) ● 3V
∆|V
OC
| Change in Magnitude of Driver Common-Mode R = 27Ω or R = 50Ω (Figure 1) ● 0.2 V
Output Voltage for Complementary Output States
V
INH
Input High Voltage DI, DE, RE ● 2.0 V
V
INL
Input Low Voltage DI, DE, RE ● 0.8 V
I
IN1
Input Current DI, DE, RE ● ±2 µA
I
IN2
Input Current (A, B) V
CC
= 0V or 5.25V, V
IN
= 12V ● 1.0 mA
V
CC
= 0V or 5.25V, V
IN
= – 7V ● – 0.8 mA
V
TH
Differential Input Threshold Voltage for Receiver – 7V ≤ V
CM
≤ 12V ● – 0.2 0.2 V
∆V
TH
Receiver Input Hysteresis V
CM
= 0V ● 60 mV
V
OH
Receiver Output High Voltage I
O
= – 4mA, V
ID
= 0.2V ● 3.5 V
V
OL
Receiver Output Low Voltage I
O
= 4mA, V
ID
= – 0.2V ● 0.4 V
I
OZR
Three-State Output Current at Receiver V
CC
= Max 0.4V ≤ V
O
≤ 2.4V ● ±1 µA
I
CC
Supply Current No Load; DI = GND or V
CC
Outputs Enabled ● 1.8 2.3 mA
Outputs Disabled ● 1.7 2.3 mA
R
IN
Receiver Input Resistance – 7V ≤ V
CM
≤ 12V ● 12 kΩ
I
OSD1
Driver Short-Circuit Current, V
OUT
= High V
O
= – 7V ● 250 mA
I
OSD2
Driver Short-Circuit Current, V
OUT
= Low V
O
= 10 V ● 250 mA
I
OSR
Receiver Short-Circuit Current 0V ≤ V
O
≤ V
CC
● 785mA
V
CC
= 5V (Notes 2, 3), unless otherwise noted.
E
LECTR
IC
AL C CHARA TERIST
ICSCD
1
2
3
45
6
7
8
TOP VIEW
RO
B
V
CC
N8 PACKAGE
8-LEAD PLASTIC DIP
D
R
A
GND
DE
DI
S8 PACKAGE
8-LEAD PLASTIC SOIC
RE
T
JMAX
= 125°C, θ
JA
= 100°C/ W (N)
T
JMAX
= 150°C, θ
JA
= 150°C/ W (S)
Consult factory for Military grade parts.
ORDER PART
NUMBER
S8 PART MARKING
LTC1485CN8
LTC1485IN8
LTC1485CS8
LTC1485IS8
1485
1485I